Editing Human migration

{{short description |Movement of people for their benefit}}
{{about| contemporary migration|a historical overview|History of human migration|pre-modern history (Neolithic to AD 1800)|Pre-modern human migration|specific types of migration|Immigration|and|Emigration}}
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'''Human migration''' is the movement of people from one place to another,<ref>{{Cite web |date=2010-12-14 |title=Introduction to Human Migration |url=http://www.nationalgeographic.org/activity/introduction-human-migration/ |url-status=dead |archive-url=https://web.archive.org/web/20160910165944/http://www.nationalgeographic.org/activity/introduction-human-migration/ |archive-date=2016-09-10 |access-date=2023-08-12 |website=National Geographic Society |language=en}}</ref> with intentions of settling, permanently or temporarily, at a new location (geographic region). The movement often occurs over long distances and from one [[country]] to another (external migration), but [[internal migration]] (within a single country) is the dominant form of human migration globally.<ref name="WMR">''[https://www.iom.int/wmr/ World Migration Report]''</ref>{{rp|page=21}}

Migration is often associated with better [[human capital]] at both individual and household level, and with better access to migration networks, facilitating a possible second move.<ref>{{cite encyclopedia |last1=Razum |first1=Oliver |title=Populations at Special Health Risk: Migrants |date= 2017 |url=https://www.sciencedirect.com/science/article/pii/B9780128036785003453 |encyclopedia=International Encyclopedia of Public Health |edition= 2nd |pages=591–598 |editor-last=Quah |editor-first=Stella R. |place=Oxford |publisher=[[Academic Press]] |language=en |isbn=978-0128037089 |access-date=October 11, 2022 |last2=Samkange-Zeeb |first2=Florence |doi=10.1016/B978-0-12-803678-5.00345-3 |archive-date=October 14, 2022 |archive-url=https://web.archive.org/web/20221014084425/https://www.sciencedirect.com/science/article/pii/B9780128036785003453 |url-status=live|url-access=subscription }}</ref> It has a high potential to improve human development, and some studies confirm that migration is the most direct route out of poverty.<ref>{{Cite journal |last1=Kumar |first1=Shailendra |last2=Choudhury |first2=Sanghamitra |date=2021-01-01 |title=Migrant workers and human rights: A critical study on India's COVID-19 lockdown policy |journal=Social Sciences & Humanities Open |language=en |volume=3 |issue=1 |pages=100130 |doi=10.1016/j.ssaho.2021.100130 |s2cid=234161193 |issn=2590-2911|doi-access=free }}</ref> Age is also important for both work and non-work migration.<ref>{{cite journal |last1=Coxhead |first1=Ian |last2=Cuong |first2=Nguyen Viet |last3=Vu |first3=Linh Hoang |title=Migration in Vietnam: New Evidence from Recent Surveys |journal=SSRN Electronic Journal |date=2015 |doi=10.2139/ssrn.2752834 |s2cid=34975118 |url=https://mpra.ub.uni-muenchen.de/70217/1/MPRA_paper_70217.pdf}}</ref> People may migrate as individuals, in [[family unit]]s or in [[Mass migration|large groups]].<ref>{{cite web |url=http://migrationsmap.net/#/USA/arrivals |title=Migrations country wise |access-date=7 June 2014 |archive-url=https://web.archive.org/web/20160211025416/http://migrationsmap.net/#/USA/arrivals |archive-date=2016-02-11 |url-status=dead}}</ref> There are four major forms of migration: [[invasion]], [[conquest]], [[colonization]] and [[emigration]]/[[immigration]].<ref>{{Cite book |title=Encyclopedia of the City |url=https://archive.org/details/encyclopediacity00cave |url-access=limited |last= Caves |first=R. W. |publisher=[[Routledge]] |year=2004 |isbn=978-0415252256 |pages=[https://archive.org/details/encyclopediacity00cave/page/n501 461]}}</ref>

People moving from their home due to [[forced displacement]] (such as a natural disaster or civil disturbance) may be described as displaced persons or, if remaining in the home country, [[internally displaced person|internally-displaced person]]s. People who flee to a different country due to political, religious, or other types of persecution in their home country can formally request shelter in the host country. These people are commonly referred to as [[asylum seeker]]s. If the application is approved, their legal classification changes to that of [[refugee]]s.<ref>{{Cite web |title=What is a refugee? |url=https://www.unhcr.org/what-refugee |access-date=2023-08-12 |website=UNHCR}}</ref>

== Definition ==
Depending on the goal and reason for relocation, migrants can be divided into three categories: migrants, [[Refugee|refugees]], and [[asylum seeker]]s. Each category is defined broadly as the combination of circumstances that motivate a person to change their location. As such, ''migrants'' are traditionally described as persons who change the country of residence for general reasons. These purposes may include better job opportunities or healthcare needs. This term is the most widely understood, as anyone changing their geographical location permanently is a migrant.<ref name="migration-vs-immigration" />

In contrast, [[refugee|''refugees'']] are defined by the [[United Nations High Commissioner for Refugees|UNHCR]] as "persons forced to flee their country because of violence or persecution".[https://www.unrefugees.org/refugee-facts/what-is-a-refugee/] The reasons for the refugees' migration usually involve war actions within the country or other forms of oppression, coming either from the government or non-governmental sources. Refugees are usually associated with people who must unwillingly relocate as fast as possible; hence, such migrants are likely to relocate undocumented.<ref name="migration-vs-immigration" />

[[Asylum seekers]] are associated with persons who also leave their country unwillingly, yet, who also do not do so under oppressing circumstances such as war or death threats. The motivation to leave the country for asylum seekers might involve an unstable economic or political situation or high [[Crime statistics|rates of crime]]. Thus, asylum seekers relocate predominantly to escape the degradation of the [[Quality of life|quality of their lives]].<ref name="migration-vs-immigration" />

[[Nomad]]ic movements usually are not regarded as migrations, as the movement is generally [[Seasonal human migration|seasonal]], there is no intention to settle in the new place, and only a few people have retained this form of lifestyle in modern times. Temporary movement for travel, tourism, pilgrimages, or the commute is also not regarded as migration, in the absence of an intention to live and settle in the visited places.<ref name="migration-vs-immigration">{{cite web |url=https://thewordpoint.com/blog/migration-vs-immigration |title=Migration vs. Immigration: Differences and Similarities |date=27 August 2020}}</ref>

== Migration patterns and related numbers ==
{{multiple image
| total_width       = 500
| image1            = 1990- Growth in share of population that is foreign-born - by country.svg
| caption1          = In recent decades, [[Immigration to the Western world|migration to nearly every Western country]] has risen sharply.<ref name=NYTimes_20240612>{{cite news |last1=Leonhardt |first1=David |title=The Force Shaping Western Politics |url=https://www.nytimes.com/2024/06/12/briefing/immigration-european-us-elections.html |newspaper=The New York Times |date=12 June 2024 |archive-url=https://web.archive.org/web/20240612124539/https://www.nytimes.com/2024/06/12/briefing/immigration-european-us-elections.html |archive-date=12 June 2024 |url-status=live }}</ref> The slopes of the tops of the differently-colored columns show the rate of percent increase in foreign-born people living in the respective countries.
| image2            = Annual Net Migration Rate 2015–2020.svg
| caption2          = Annual Net Migration Rate 2015–2020. Prediction by UN in 2019.
}}
[[File:Migrants in the world 1960-2015-en.png|thumb|upright=1.25|The number of migrants in the world, 1960–2015<ref>{{cite web|access-date=2017-09-29|title=International migrant stock, total|url=https://data.worldbank.org/indicator/SM.POP.TOTL|work=The World Bank Data}}<!-- auto-translated by Module:CS1 translator --></ref>]]
There exist many statistical estimates of worldwide migration patterns. The [[World Bank]] has published three editions of its ''Migration and Remittances Factbook'', beginning in 2008, with a second edition appearing in 2011 and a third in 2016.<ref>"[https://openknowledge.worldbank.org/discover?scope=%2F&query=Migration+and+Remittances+Factbook&submit= Open Knowledge Repository: Migration and Remittances Factbook]". World Bank Group. Retrieved 2019-08-11; ''Migrations and Remittances Factbook 2016'', p. xiii: "Factbook 2016 builds on the two previous editions of Factbooks".</ref> The [[International Organisation for Migration]] (IOM) has published ten editions of the ''[[World Migration Report]]'' since 1999.<ref name="WMR"/><ref name="world-migration-report-2020">{{Cite journal |date=2019-01-02 |title=World Migration Report 2020 |url=https://publications.iom.int/books/world-migration-report-2020 |journal=International Organisation for Migration |language=en |issn=1561-5502}}</ref> The [[United Nations Statistics Division]] also keeps a database on worldwide migration.<ref>{{Cite web |url=http://esa.un.org/unmigration/wallchart2013.htm |title=United Nations Population Division &#124; Department of Economic and Social Affairs |access-date=2014-09-09 |archive-date=2023-04-21 |archive-url=https://web.archive.org/web/20230421022751/https://esa.un.org/unmigration/wallchart2013.htm |url-status=dead }}</ref> Recent advances in research on migration via the Internet promise better understanding of migration patterns and migration motives.<ref>{{cite journal |last1=Oiarzabal |first1=P. J. | last2 = Reips |first2=U.-D. |year=2012 |title=Migration and diaspora in the age of information and communication technologies |url=https://zenodo.org/record/897706 |journal=[[Journal of Ethnic and Migration Studies]] |volume=38 |issue=9 |pages=1333–1338 |doi=10.1080/1369183X.2012.698202 |s2cid=144246309}}</ref><ref>Reips, U.-D., & Buffardi, L. (2012). [http://www.uni-konstanz.de/iscience/reips/pubs/papers/2012ReipsBuffardi_JEMS.pdf "Studying migrants with the help of the Internet: Methods from psychology"], ''Journal of Ethnic and Migration Studies'', 38(9), 1405–1424. {{doi|10.1080/1369183X.2012.698208}}</ref>

Structurally, there is substantial [[South–South cooperation|South–South]] and North–North migration; in 2013, 38% of all migrants had migrated from developing countries to other developing countries, while 23% had migrated from high-income [[OECD]] countries to other high-income countries.<ref>''Migration and Remittances Factbook 2016'', p. 11 (reflecting figures from 2013).</ref> The [[United Nations Population Fund]] says that "while the North has experienced a higher absolute increase in the migrant stock since 2000 (32 million) compared to the South (25 million), the South recorded a higher growth rate. Between 2000 and 2013, the average annual rate of change of the migrant population in developing regions (2.3%) slightly exceeded that of the developed regions (2.1%)."<ref name="UNFrPA">{{cite web |year=2013 |title=International Migration 2013 (wall chart) |url=http://www.unfpa.org/resources/international-migration-2013-wall-chart |publisher=UNFPA}}</ref>

Substantial internal migration can also take place within a country, either [[seasonal human migration]] (mainly related to agriculture and tourism to urban places), or shifts of the population into cities ([[urbanisation]]) or out of cities ([[suburbanisation]]). However, studies of worldwide migration patterns tend to limit their scope to [[international migration]].

{| class="wikitable"
|+ International migrants, 1970–2015<ref>{{cite web |title=World Migration Report 2018 |url=https://publications.iom.int/system/files/pdf/wmr_2018_en.pdf |publisher=[[International Organization for Migration]] |access-date=26 November 2019 |pages=15}}</ref>
|-
! Year !! Number of migrants !! Migrants as a % <p> of the world's population </p>
|-
| 1970 || 84,460,125 || 2.3%
|-
| 1975 || 90,368,010 || 2.2%
|-
| 1980 || 101,983,149 || 2.3%
|-
| 1985 || 113,206,691 || 2.3%
|-
| 1990 || 152,563,212 || 2.9%
|-
| 1995 || 160,801,752 || 2.8%
|-
| 2000 || 172,703,309 || 2.8%
|-
| 2005 || 191,269,100 || 2.9%
|-
| 2010 || 221,714,243 || 3.2%
|-
| 2015 || 243,700,236 || 3.3%
|-
| 2020 || 280 598 105 || 3.6%<ref>World Migration Report 2024, https://publications.iom.int/books/world-migration-report-2024</ref>
|}
Almost half of these migrants are women, one of the most significant migrant-pattern changes in the last half-century.<ref name="UNFrPA" /> Women migrate alone or with their family members and community. Even though female migration is largely viewed as an association rather than independent migration, emerging studies argue complex and manifold reasons for this.<ref>{{cite book |last=Thapan |first=M. |date=2008 |chapter=Series Introduction |title=Women and Migration in Asia |editor1-last=Palriwala |editor2-last=Uberoi |location=New Delhi |publisher=Sage Publications |isbn=978-0761936756 |page=359}}</ref>

As of 2019, the top ten [[immigration|immigration destinations]] were:<ref name="WMR2020chapter02" />
{{div col|colwidth=10em}}
* [[United States]]
* [[Germany]]
* [[Saudi Arabia]]
* [[Russian Federation]]
* [[United Kingdom]]
* [[United Arab Emirates]]
* [[France]]
* [[Canada]]
* [[Australia]]
* [[Italy]]
{{Div col end}}
In the same year, the top countries of origin were:<ref name="WMR2020chapter02">IOM. "[https://www.iom.int/wmr/2020/chapter/02 Migration and migrants: A global overview]." Ch. 2 in ''World Migration Report 2020''.  {{Webarchive|url=https://web.archive.org/web/20210118155722/https://www.iom.int/wmr/2020/chapter/02 |date=2021-01-18 }}</ref>
{{div col|colwidth=10em}}
* [[India]]
* [[Mexico]]
* [[China]]
* [[Russian Federation]]
* [[Syrian Arab Republic]]
* [[Bangladesh]]
* [[Pakistan]]
* [[Philippines]]
* [[Afghanistan]]
* [[Indonesia]]
{{Div col end}}

Besides these rankings, according to absolute numbers of migrants, the ''Migration and Remittances Factbook'' also gives statistics for top immigration destination countries and top emigration origin countries according to percentage of the population; the countries that appear at the top of those rankings are entirely different from the ones in the above rankings and tend to be much smaller countries.<ref name="MRF2016">''Migration and Remittances Factbook 2016''</ref>{{Rp|2, 4}}

[[File:Brooklyn Chinatown.png|thumb|Typical grocery store on [[Eighth Avenue (Brooklyn)#Chinatown|8th Avenue]] in one of the [[Chinatown, Brooklyn#Streetscape|Brooklyn Chinatowns]] on [[Long Island]], [[New York (state)|New York]].]] 
[[Chinese Americans in New York City|New York City]]'s multiple [[Chinatowns in New York|Chinatowns]] in [[Chinatowns in Queens#Streetscape|Queens]], [[Chinatown, Manhattan#Streetscape|Manhattan]], and Brooklyn are thriving as traditionally urban [[ethnic enclave|enclaves]], as large-scale Chinese immigration continues into New York,<ref name=Immigrants2013est>{{cite web |url=https://www.dhs.gov/sites/default/files/publications/immigration-statistics/yearbook/2013/LPR/immsuptable2d.xls |title=Yearbook of Immigration Statistics: 2013 Supplemental Table 2 |publisher=U.S. Department of Homeland Security |access-date=14 April 2016}}</ref><ref name=Immigrants2012est>{{cite web |url=https://www.dhs.gov/sites/default/files/publications/immigration-statistics/yearbook/2012/LPR/immsuptable2d.xls |title=Yearbook of Immigration Statistics: 2012 Supplemental Table 2 |publisher=U.S. Department of Homeland Security |access-date=14 April 2016 |archive-url=https://web.archive.org/web/20141222152450/http://www.dhs.gov/sites/default/files/publications/immigration-statistics/yearbook/2012/LPR/immsuptable2d.xls |archive-date=22 December 2014 |url-status=dead }}</ref><ref>{{cite web |url=https://www.dhs.gov/xlibrary/assets/statistics/yearbook/2011/immsuptable2d.xls |title=Yearbook of Immigration Statistics: 2011 Supplemental Table 2 |publisher=U.S. Department of Homeland Security |access-date=14 April 2016}}</ref><ref>{{cite news|url=http://www.nydailynews.com/news/world/malaysian-man-smuggled-illegal-chinese-immigrants-brooklyn-queen-mary-2-authorities-article-1.143516|title=Malaysian man smuggled illegal Chinese immigrants into Brooklyn using Queen Mary 2: authorities |author=John Marzulli|work=Daily News|location=New York |date=9 May 2011 |access-date=14 April 2016 }}</ref> with the largest metropolitan Chinese population outside Asia,<ref>{{cite web|url=http://www.queensbuzz.com/flushing-neighborhood-corona-neighborhood-cms-302|title=Chinese New Year 2012 in Flushing|publisher=QueensBuzz.com|date=25 January 2012|access-date=14 April 2016}}</ref> The [[New York metropolitan area]] contains the [[Chinese Americans in New York City|largest ethnic Chinese population]] outside of [[Asia]], comprising an estimated 893,697 uniracial individuals as of 2017.<ref>{{cite web|url=https://factfinder.census.gov/bkmk/table/1.0/en/ACS/17_1YR/S0201/330M400US408/popgroup~016|title=SELECTED POPULATION PROFILE IN THE UNITED STATES 2017 American Community Survey 1-Year Estimates New York-Newark, NY-NJ-CT-PA CSA Chinese alone|publisher=[[United States Census Bureau]]|access-date=27 January 2019|archive-url=https://archive.today/20200214002005/https://factfinder.census.gov/bkmk/table/1.0/en/ACS/17_1YR/S0201/330M400US408/popgroup~016|archive-date=14 February 2020|url-status=dead}}</ref>
{{clear}}
As of 2013, the top 15 migration corridors (accounting for at least two million migrants each) were:<ref name="MRF2016" />{{Rp|5}}
{{div col|colwidth=20em}}
# [[Mexican Americans|Mexico–United States]]
# [[Russians in Ukraine|Russian Federation–Ukraine]]
# [[Bangladeshis in India|Bangladesh–India]]
# [[Ukrainians in Russia|Ukraine–Russian Federation]]
# [[Kazakhs in Russia|Kazakhstan–Russian Federation]]
# [[Chinese Americans|China–United States]]
# [[Russians in Kazakhstan|Russian Federation–Kazakhstan]]
# [[Afghans in Pakistan|Afghanistan–Pakistan]]
# [[Afghans in Iran|Afghanistan–Iran]]
# [[New immigrants in Hong Kong|China–Hong Kong]]
# [[Indians in the United Arab Emirates|India–United Arab Emirates]]
# [[Palestinians in Jordan|West Bank and Gaza–Jordan]]
# [[Indian Americans|India–United States]]
# [[Non-Resident Indians in Saudi Arabia|India–Saudi Arabia]]
# [[History of Filipino Americans|Philippines–United States]]
{{Div col end}}

== Economic impacts ==

=== World economy ===
[[File:Dorothea Lange, Drought refugees from Oklahoma camping by the roadside, Blythe, California, 1936.jpg|thumb|upright|[[Dorothea Lange]], Drought refugees from [[Oklahoma]] camping by the roadside, [[Blythe, California]], 1936]]
The impacts of human migration on the [[world economy]] have been largely positive. In 2015, migrants, who constituted 3.3% of the [[world population]], contributed 9.4% of global GDP.<ref>{{Cite book |url=https://www.mckinsey.com/featured-insights/employment-and-growth/global-migrations-impact-and-opportunity |title=People on the Move: Global Migration's Impact and Opportunity |publisher=McKinsey Global Institute |year=2016}}</ref><ref>{{cite journal |last1=Bove |first1=Vincenzo |last2=Elia |first2=Leandro |title=Migration, Diversity, and Economic Growth |journal=[[World Development (journal)|World Development]] |date=2017 |volume=89 |pages=227–239 |doi=10.1016/j.worlddev.2016.08.012 |doi-access=free|hdl=11566/263676 |hdl-access=free }}</ref>

At a microeconomic level, the value of a human mobility is largely recognized by firms. A 2021 survey by the Boston Consulting Group found that 72% of 850+ executives across several countries and industries believed that migration benefited their countries, and 45% considered globally diverse employees a strategic advantage.<ref>{{Cite web |date=2022-06-06 |title=When Innovation Has No Borders, Culture Is Key |url=https://www.bcg.com/publications/2022/innovation-without-borders |access-date=2022-06-20 |website=BCG Global |language=en}}</ref>

According to the [[Center for Global Development|Centre for Global Development]], opening all borders could add $78 trillion to the [[Gross world product|world GDP]].<ref>{{Cite news |url=https://www.economist.com/the-world-if/2017/07/13/a-world-of-free-movement-would-be-78-trillion-richer |title=A world of free movement would be $78 trillion richer |date=2017-07-13 |newspaper=[[The Economist]] |access-date=2019-02-10 |issn=0013-0613}}</ref><ref>{{Cite journal |last=Clemens |first=Michael A. |date=September 2011 |title=Economics and Emigration: Trillion-Dollar Bills on the Sidewalk? |journal=[[Journal of Economic Perspectives]] |language=en |volume=25 |issue=3 |pages=83–106 |doi=10.1257/jep.25.3.83 |s2cid=59507836 |issn=0895-3309 |url=http://www.aeaweb.org/articles.php?doi=10.1257/jep.25.3.83|url-access=subscription }}</ref>

=== Remittances ===
[[Remittance]]s (funds transferred by migrant workers to their home country) form a substantial part of the economy of some countries. The top ten remittance recipients in 2018.
{| class="wikitable sortable"
!Rank
!Country
!Remittance (in billions of US dollars)
!Percent of GDP
|-
||1||{{Flag|India}}||80||2.80
|-
||2||{{Flag|China}}||67||0.50
|-
||3||{{Flag|Philippines}}||34||9.14
|-
||4||{{Flag|Mexico}}||34||1.54
|-
||5||{{Flag|France}}||25||0.96
|-
||6||{{Flag|Nigeria}}||22||5.84
|-
||7||{{Flag|Egypt}}||20||8.43
|-
||8||{{Flag|Pakistan}}||20||6.57
|-
||9||{{Flag|Bangladesh}}||18||5.73
|-
||10||{{Flag|Vietnam}}||14||6.35
|}

In addition to economic impacts, migrants also make substantial contributions in sociocultural and civic-political life. Sociocultural contributions occur in the following areas of societies: food/cuisine, sport, music, art/culture, ideas and beliefs; civic-political contributions relate to participation in civic duties in the context of accepted authority of the State.<ref>McAuliffe, Kitimbo & Khadria, 2019, 'Reflections on migrations' contributions in an era of increasing disruption and disinformation', World Migration Report 2020, IOM: Geneva.</ref> It is in recognition of the importance of these remittances that the United Nations [[Sustainable Development Goal 10]] targets to substantially reduce the transaction costs of migrants remittances to less than 3% by 2030.<ref>{{Cite web |title=Goal ten targets |url=https://www.undp.org/content/undp/en/home/sustainable-development-goals/goal-10-reduced-inequalities/targets.html |access-date=2020-09-23 |website=UNDP |language=en |archive-date=2020-11-27 |archive-url=https://web.archive.org/web/20201127140337/https://www.undp.org/content/undp/en/home/sustainable-development-goals/goal-10-reduced-inequalities/targets.html |url-status=dead }}</ref>

== Voluntary and forced migration ==
Migration is usually divided into ''voluntary migration'' and ''forced migration''. The distinction between ''involuntary'' (fleeing political conflict or natural disaster) and ''voluntary migration'' (economic or [[Labour Migration|labour migration]]) is difficult to make and partially subjective, as the motivators for migration are often correlated. The [[World Bank]] estimated that, as of 2010, 16.3 million or 7.6% of migrants qualified as refugees.<ref name="worldbankfactbook2011">{{cite web |title=Migration and Remittances Factbook 2011 |url=https://siteresources.worldbank.org/INTLAC/Resources/Factbook2011-Ebook.pdf |access-date=25 March 2019 |publisher=[[World Bank]] |page=18 |edition=2nd |place=Washington, D.C.}}</ref> This number grew to 19.5 million by 2014 (comprising approximately 7.9% of the total number of migrants, based on the figure recorded in 2013).<ref name="worldbankfactbook2016">{{cite web |title=Migration and Remittances Factbook 2016 |url=https://openknowledge.worldbank.org/bitstream/handle/10986/23743/9781464803192.pdf?sequence=3&isAllowed=y |access-date=25 March 2019 |publisher=[[World Bank]] |pages=19–20 |edition=3rd |place=Washington, D.C.}} As noted on p. xiii, the report presents migrant stocks for 2013, refugee numbers for 2014, remittance outflows for 2014, and remittance inflows for 2015.</ref> At levels of roughly 3 percent the share of migrants among the world population has remained remarkably constant over the last 5 decades.<ref>{{Cite journal |first1=Mathias |last1=Czaika |first2=Hein de |last2=Haas |year=2014 |title=The Globalization of Migration: Has the World Become More Migratory? |journal=[[International Migration Review]] |volume=48 |issue=2 |pages=283–323 |doi=10.1111/imre.12095 |s2cid=144759565}}</ref>

=== Voluntary migration ===
{{See also|Free State Project}}
'''Voluntary migration''' is based on the initiative and the free will of the person and is influenced by a combination of factors: economic, political and social: either in the migrants' country of origin (determinant factors or "push factors") or in the country of destination (attraction factors or "pull factors"). "Push-pull factors" are the reasons that push or attract people to a particular place. "Push" factors are the negative aspects(for example wars) of the country of origin, often decisive in people's choice to emigrate. The "pull" factors are the positive aspects of a different country that encourages people to emigrate to seek a better life. For example, the government of [[Armenia]] periodically gives incentives to people who will migrate to live in villages close to the border with Azerbaijan. This is an implementation of a push strategy, and the reason people do not want to live near the border is security concerns given tensions and hostility because of Azerbaijan.<ref>{{Cite news |title=More Armenian Border Villages Eligible For Tax Breaks, Subsidies |url=https://www.azatutyun.am/a/31106046.html |access-date=2021-05-01 |website=«Ազատ Եվրոպա/Ազատություն» ռադիոկայան |date=16 February 2021 |language=hy|last1=Badalian |first1=Susan }}</ref>

Although the push-pull factors are opposed, both are sides of the same coin, being equally important. Although specific to forced migration, any other harmful factor can be considered a "push factor" or determinant/trigger factor, such examples being: poor quality of life, lack of jobs, excessive pollution, hunger, drought or natural disasters. Such conditions represent decisive reasons for voluntary migration, the population preferring to migrate in order to prevent financially unfavorable situations or even emotional and physical suffering.<ref>{{Cite journal |last=Tataru |first=Georgiana |date=2020-01-14 |title=Migration – an Overview on Terminology, Causes and Effects |url=https://www.researchgate.net/publication/338590488 |journal=Logos Universality Mentality Education Novelty: Law |volume=7 |issue=2 |pages=10–29 |doi=10.18662/lumenlaw/24 |doi-access=free}}</ref>

=== Forced migration ===
There are contested definitions of forced migration. However, the editors of a leading scientific journal on the subject, the ''[[Forced Migration Review]]'', offer the following definition: Forced migration refers to the movements of refugees and internally displaced people (displaced by conflict) as well as people displaced by natural or environmental disasters, chemical or nuclear disasters, famine, or development projects.<ref>{{Cite web |title=Welcome {{!}} Forced Migration Review |url=https://www.fmreview.org/ |access-date=2022-11-16 |website=www.fmreview.org}}</ref> These different causes of migration leave people with one choice, to move to a new environment. Immigrants leave their beloved homes to seek a life in camps, spontaneous settlement, and countries of asylum.<ref>[[Colson, Elizabeth]], [http://web.mnstate.edu/robertsb/308/forced%20migration%20and%20the%20anthropological%20response.pdf "Forced Migration and the Anthropological Response"]. ''[[Journal of Refugee Studies]]''. Vol. 16, No. 1, 2003, pp. 1–19</ref>

By the end of 2018, there were an estimated 67.2 million forced migrants globally{{snd}}25.9 million refugees displaced from their countries, and 41.3 million internally displaced persons that had been displaced within their countries for different reasons.<ref name="world-migration-report-2020"/> In 2022, 6 million Ukrainian people fled their country; meanwhile, 3 million Syrian people fled in 3 years.

== Transit migration ==
Transit migration is a highly debated term with no official definition. The common understanding is that it describes immigrants who are in the process of moving to an end goal country. The term was first coined by the UN in 1990 to describe immigrants who were traveling through countries surrounding Europe to end up in a European Union state.<ref name="Basok2018">{{Cite book |last=Basok |first=Tanya |title=New Migration Patterns in the Americas |chapter=The Discourse of "Transit Migration" in Mexico and its "Blind Spot": Changing Realities and New Vocabularies |date=26 July 2018 |chapter-url=https://link.springer.com/chapter/10.1007/978-3-319-89384-6_4 |pages=85–107 |doi=10.1007/978-3-319-89384-6_4 |isbn=978-3-319-89383-9 |s2cid=158975397 |via=SpringerLink}}</ref> Another example of transit migrants is Central Americans who travel through Mexico in order to live in the United States.<ref>{{Cite journal |last1=Cantalapiedra |first1=Eduardo Torre |last2=Nava |first2=Dulce María Mariscal |date=2020-04-22 |title=Batallando con fronteras: estrategias migratorias en tránsito de participantes en caravanas de migrantes |url=https://ref.uabc.mx/ojs/index.php/ref/article/view/854 |journal=Estudios Fronterizos |language=es |volume=21 |doi=10.21670/ref.2005047 |s2cid=219100760 |issn=2395-9134|doi-access=free }}</ref>

The term "transit migration" has generated a lot of debate among migration scholars and immigration institutions. Some criticize it as a Eurocentric term that was coined to place responsibility of migrants on states outside the European Union; and also to pressure those states to prevent migration onward to the European Union.<ref name="Basok2018" /> Scholars note that EU countries also have identical migrant flows and therefore it is not clear (illogical or biased) why it is only migrants in non-EU countries that are labeled as transit migrants.<ref>{{Cite journal |last=Düvell |first=Frank |date=26 October 2010 |title=Transit migration: A blurred and politicised concept |url=https://onlinelibrary.wiley.com/doi/abs/10.1002/psp.631 |journal=Population Space and Place |volume=18 |issue=4 |pages=415–427 |doi=10.1002/psp.631 |via=Wiley Online Library|url-access=subscription }}</ref> It is also argued that the term "transit" glosses over the complexity and difficulty of migrant journeys: migrants face many types of violence while in transit; migrants often have no set end destination and must adjust their plan as they move (migrant journeys can take years and go through several stages).

== Contemporary labor migration theories ==

=== Overview ===
Numerous causes impel migrants to move to another country. For instance, [[globalization]] has increased the demand for workers in order to sustain national economies. Thus one category of [[economic migrant]]s – generally from impoverished developing countries – migrates to obtain sufficient income for survival.<ref name="unfpa.org">{{Cite news|url=https://www.unfpa.org/migration|title=Migration|website=United Nations Population Fund}}</ref>{{request quotation|date=October 2018}}<ref>{{cite book |last1=Yeoh |first1=Brenda S. A. |last2=Huang |first2=Shirlena |last3=Lam |first3=Theodora |chapter=Transnational family dynamics in Asia |editor1-last=Triandafyllidou |editor1-first=Anna |title=Handbook of Migration and Globalisation |chapter-url=https://books.google.com/books?id=S1RMDwAAQBAJ |series=Handbooks on Globalisation Series |location=Cheltenham, UK |publisher=[[Edward Elgar Publishing]] |date=2018 |page=416 |isbn=978-1785367519 |access-date=2018-10-29 |quote=[...]families may assume transnational morphologies with the strategic intent of ensuring economic survival or maximising social mobility. |via=[[Google Books]]}}</ref> Such migrants often send some of their income homes to family members in the form of [[remittances|economic remittances]], which have become an economic staple in a number of developing countries.<ref>Jason de Parle, "A Good Provider Leaves", ''New York Times'', 22 Apr 2007.</ref> People may also move or are forced to move as a result of conflict, of [[human rights violations|human-rights violations]], of violence, or to escape persecution. In 2014, the UN Refugee agency estimated that around 59.5 million people fell into this category.<ref name="unfpa.org" /> Other reasons people may move include to gain access to opportunities and services or to escape extreme weather. This type of movement, usually from rural to urban areas, may be classed as [[internal migration]].<ref name="unfpa.org" />{{request quotation|date=October 2018}} Sociology-cultural and ego-historical factors also play a major role. In North Africa, for example, emigrating to Europe counts as a sign of social prestige. Moreover, many countries were former [[colony|colonies]]. This means that many have relatives who live legally in the (former) colonial [[metropole|metro pole]] and who often provide important help for immigrants arriving in that metropole.<ref>For example, [[Moroccans in France]], [[Filipino Americans|Filipinos in the United States of America]], [[Koreans in Japan]] or [[Samoans in New Zealand]].</ref>

Relatives may help with job research and with accommodation.<ref>{{Cite journal |last=Geschiere |first=Peter |date=2020 |title="The African family is large, very large" mobility and the flexibility of kinship – examples from Cameroon |journal=Ethnography |volume=21 |issue=3 |pages=335–354|doi=10.1177/1466138120938076 |s2cid=221039801 |doi-access=free |hdl=11245.1/2cabfab4-2255-41ec-8133-4a2498454ae7 |hdl-access=free }}</ref> The geographical proximity of Africa to Europe and the long historical ties between Northern and Southern Mediterranean countries also prompt many to migrate.<ref>{{cite web |last1=Fanack |title=The Key Drivers of North African Illegal Migration to Europe |url=https://chronicle.fanack.com/specials/international-affairs/north-african-illegal-migration-to-europe/ |website=Fanack.com |access-date=14 Jul 2015 |url-status=dead |archive-url=https://web.archive.org/web/20150714172715/https://chronicle.fanack.com/specials/international-affairs/north-african-illegal-migration-to-europe/ |archive-date=14 July 2015 |quote=The proximity of North Africa to southern Europe, the liberal mobility policies of most European countries, and the historical links between northern and southern Mediterranean countries are all key factors encouraging people to migrate to Europe.}}</ref> Whether a person decides to move to another country depends on the relative skill premier of the source and host countries. One is speaking of [[positive selection]] when the host country shows a higher skill premium than the source country. On the other hand, negative selection occurs when the source country displays a lower skill premium. The relative skill premia define migrants selectivity. [[Age heaping]] techniques display one method to measure the relative skill premium of a country.<ref>{{cite journal |last1=Baten |first1=Jörg |last2=Stolz |first2=Yvonne Stolz |title=Brain drain, numeracy and skill premia during the era of mass migration: reassessing the Roy-Borjas model |journal=[[Explorations in Economic History]] |date=2012 |volume=49 |pages=205–220}}</ref> A number of theories attempt to explain the international flow of capital and people from one country to another.<ref name="Jennissen, R 2007">Jennissen, R. 2007. "Causality Chains in the International Migration Systems Approach." ''[[Population Research and Policy Review]]'' 26(4):411–436.</ref>

=== Research contributions ===
Recent academic output on migration comprises mainly journal articles. The long-term trend shows a gradual increase in academic publishing on migration, which is likely to be related to the general expansion of academic literature production, and the increased prominence of migration research.<ref>IOM. 'Chapter 4: Migration research and analysis: Growth, reach and recent contributions.' World Migration Report 2020. p.127. https://www.iom.int/wmr/2020/chapter/04 {{Webarchive|url=https://web.archive.org/web/20210118172700/https://www.iom.int/wmr/2020/chapter/04 |date=2021-01-18 }}</ref>
Migration and its research have further changed with the revolution in information and communication technologies.<ref>Oiarzabal, P. J., & Reips, U.-D. (2012). Migration and diaspora in the age of information and communication technologies. Journal of Ethnic and Migration Studies, 38(9), 1333–1338. {{doi|10.1080/1369183X.2012.698202}}</ref><ref>Oiarzabal, P. J., & Reips, U.-D. (eds.) (2012). Migration and the Internet: Social networking and diasporas [Special issue]. Journal of Ethnic and Migration Studies, 38(9).</ref><ref>Reips, U.-D., and L. Buffardi. 2012. "Studying migrants with the help of the Internet: Methods from psychology." ''[[Journal of Ethnic and Migration Studies]]'' 38(9):1405–1424. {{doi|10.1080/1369183X.2012.698208}}</ref>

=== Neoclassical economic theory ===
{{main|Neoclassical economics}}

This migration theory states that the main reason for labour migration is wage difference between two geographic locations. These wage differences are usually linked to [[Geographic mobility|geographic labour demand and supply]]. It can be said that areas with a shortage of labour but an excess of capital have a high relative wage while areas with a high labour supply and a dearth of capital have a low relative wage. Labour tends to flow from low-wage areas to high-wage areas. Often, with this flow of labour comes changes in the sending and the receiving country. Neoclassical economic theory best describes transnational migration because it is not confined by international immigration laws and similar governmental regulations.<ref name="Jennissen, R 2007" />

=== Dual labor market theory ===
Dual labour market theory states that pull factors in more developed countries mainly cause migration. This theory assumes that the labour markets in these developed countries consist of two segments: the primary market, which requires high-skilled labour, and the secondary market, which is very labour-intensive, requiring low-skilled workers. This theory assumes that migration from less developed countries into more developed countries results from a pull created by a need for labour in the developed countries in their secondary market. [[Migrant worker]]s are needed to fill the lowest rung of the labour market because the native labourers do not want to do these jobs as they present a lack of mobility. This creates a need for migrant workers. Furthermore, the initial dearth in available labour pushes wages up, making migration even more enticing.<ref name="Jennissen, R 2007"/>

=== New economics of labor migration ===
This theory states that migration flows and patterns cannot be explained solely at the level of individual workers and their economic incentives but that wider social entities must also be considered. One such social entity is the household. Migration can be viewed as a result of risk aversion from a household that has insufficient income. In this case, the household needs extra capital that can be achieved through remittances sent back by family members who participate in migrant labour abroad. These [[remittances]] can also have a broader effect on the economy of the sending country as a whole as they bring in capital.<ref name="Jennissen, R 2007"/> Recent research has examined a decline in US interstate migration from 1991 to 2011, theorising that the reduced interstate migration is due to a decline in the geographic specificity of occupations and an increase in workers' ability to learn about other locations before moving there, through both information technology and inexpensive travel.<ref>{{cite journal |url=http://www.minneapolisfed.org/research/wp/wp697.pdf |journal=[[Federal Reserve Bank of Minneapolis]] |title=Understanding the Long-Run Decline in Interstate Migration |date=April 2012 |access-date=18 May 2019 |first1=Greg |last1=Kaplan |first2=Sam |last2=Schulhofer-Wohl |author2-link=Sam Schulhofer-Wohl |pages=58}}</ref> Other researchers find that the location-specific nature of housing is more important than moving costs in determining labour reallocation.<ref>{{cite journal |url=http://www.chicagofed.org/digital_assets/publications/working_papers/2010/wp2010_18.pdf |journal=[[Federal Reserve Bank of Chicago]] |title=The Role of Housing in Labour Reallocation |date=29 November 2010 |access-date=18 May 2019 |first1=Morris |last1=Davis |first2=Jonas |last2=Fisher |first3=Marcelo |last3=Veracierto |pages=50}}</ref>

=== Relative deprivation theory ===
{{main|Relative deprivation}}
Relative deprivation theory states that awareness of the income difference between neighbours or other households in the migrant-sending community is essential in migration. The incentive to migrate is a lot higher in areas with a high level of [[economic inequality]]. In the short run, remittances may increase inequality, but in the long run, they may decrease it. There are two stages of migration for workers: first, they invest in human capital formation, and then they try to capitalise on their investments. In this way, successful migrants may use their new capital to provide better schooling for their children and better homes for their families. Successful high-skilled emigrants may serve as an example for neighbours and potential migrants who hope to achieve that level of success.<ref name="Jennissen, R 2007"/>

=== World systems theory ===
[[World-systems theory]] looks at migration from a global perspective. It explains that interaction between different societies can be an important factor in social change. Trade with one country, which causes an economic decline in another, may create incentive to migrate to a country with a more vibrant economy. It can be argued that even after decolonisation, the economic dependence of former colonies remains on mother countries. However, this view of [[international trade]] is controversial, and some argue that free trade can reduce migration between developing and developed countries. It can be argued that the developed countries import labour-intensive goods, which causes an increase in the employment of unskilled workers in the less developed countries, decreasing the outflow of migrant workers. Exporting capital-intensive goods from rich countries to developing countries also equalises income and employment conditions, thus slowing migration. In either direction, this theory can be used to explain migration between countries that are geographically far apart.<ref name="Jennissen, R 2007"/>

=== Osmosis theory ===
Based on the [[history of human migration]]<ref>Djelti S, [https://www.researchgate.net/publication/320427737_The_Evolution_of_the_Human_Migration_Determinants_1_Draft_paper "The Evolution of the Human Migration Determinants"] draft paper presented in the international conference on "Crossing Boundaries: Youth, Migration, and Development", At Alakhawayn University in Ifran, Morocco – March 2–4, 2017</ref> osmosis theory studies the evolution of its natural determinants. In this theory migration is divided into two main types: simple and complicated. The simple migration is divided, in its turn, into diffusion, stabilisation and concentration periods. During these periods, water availability, adequate climate, security and population density represent the natural determinants of human migration. The complicated migration is characterised by the speedy evolution and the emergence of new sub-determinants, notably earning, unemployment, networks, and migration policies. Osmosis theory<ref>Djelti S, [https://www.researchgate.net/publication/320427688_Osmosis_the_unifying_theory_of_human_migration "Osmosis: the Unifying Theory of Human Migration"], ''Revue Algérienne d’Economie et du Management'' Vol. 08, N°: 02 (2017)</ref> explains analogically human migration by the biophysical phenomenon of [[osmosis]]. In this respect, the countries are represented by [[animal cells]], the borders by the [[semipermeable membranes]] and the humans by [[ions]] of water. According to the theory, according to the osmosis phenomenon, humans migrate from countries with less migration pressure to countries with high migration pressure. To measure the latter, the natural determinants of human migration replace the variables of the [[second principle of thermodynamics]] used to measure the [[osmotic pressure]].

== Social-scientific theories ==

=== Sociology ===
{{main|Sociology of immigration}}A number of social scientists have examined immigration from a [[Sociology|sociological]] perspective, paying particular attention to how immigration affects and is affected by, matters of [[Race (human categorisation)|race]] and [[Ethnic group|ethnicity]], as well as [[social structure]]. They have produced three main sociological perspectives:
* [[symbolic interactionism]], which aims to understand migration via face-to-face interactions on a micro-level
* [[social conflict theory]], which examines migration through the prism of competition for [[Power (social and political)|power]] and [[resource]]s
* [[structural functionalism]] (based on the ideas of [[Émile Durkheim]]), which examines the role of migration in fulfilling certain functions within each society, such as the decrease of [[Anomie|despair and aimlessness]] and the consolidation of [[social network]]s

In the 21st century, as attention has shifted away from countries of destination, sociologists have attempted to understand how [[transnationalism]] allows us to understand the interplay between migrants, their countries of destination, and their countries of origins.<ref>{{Cite book|url= https://books.google.com/books?id=sBJTOhDpauQC&q=schiller+basch&pg=PT5 |title=Nations Unbound: Transnational Projects, Postcolonial Predicaments, and Deterritorialized Nation-States|last1= Basch |first1=Linda |last2=Schiller|first2= Nina Glick|last3= Blanc|first3= Christina Szanton|date= 2005|publisher= Routledge |isbn=978-1135307035 |language=en}}</ref> In this framework, work on social remittances by [[Peggy Levitt]] and others has led to a stronger conceptualisation of how migrants affect socio-political processes in their countries of origin.<ref>{{Cite journal |last=Levitt |first=Peggy |date=1998 |title=Social Remittances: Migration Driven Local-Level Forms of Cultural Diffusion|jstor= 2547666 |journal=The International Migration Review |volume=32 |issue=4 |pages=926–948 |doi=10.2307/2547666 |pmid=12294302}}
</ref> Much work also takes place in the field of [[Social integration|integration]] of migrants into destination-societies.<ref>
For example:
{{cite book
 | last1 = Hack-Polay
 | first1 = Dieu
 | year = 2013
 | title = Reframing Migrant Integration
 | url = https://books.google.com/books?id=fwEvDAAAQBAJ
 | location = Kibworth, Leicestershire
 | publisher = Book Guild Publishing
 | publication-date = 2016
 | isbn = 978-1911320319
 | access-date = 12 January 2020
}}
</ref>

===Political science===
Political scientists have put forth a number of theoretical frameworks relating to migration, offering different perspectives on processes of [[International security|security]],<ref>{{cite book |last=Faist |first= Thomas |date=2006 |pages=103–119 |publisher=[[Palgrave Macmillan]] US |language=en |doi=10.1057/9781403984678_6 |isbn=978-1349532650 |title=Migration, Citizenship, Ethnos |chapter=The Migration-Security Nexus: International Migration and Security Before and After 9/11 |hdl=2043/686 |chapter-url=https://pub.uni-bielefeld.de/record/2318503 |hdl-access=free}}</ref><ref>{{Cite journal |last=Adamson |first=Fiona B. |date=July 2006 |title=Crossing Borders: International Migration and National Security |journal=International Security |language=en |volume=31 |issue=1 |pages=165–199 |doi=10.1162/isec.2006.31.1.165 |s2cid=57567184 |issn=0162-2889}}</ref> [[citizenship]],<ref>{{Cite book |url=https://global.oup.com/academic/product/the-oxford-handbook-of-citizenship-9780198805854?cc=gb&lang=en& |title=The Oxford Handbook of Citizenship |date=2017 |publisher=[[Oxford University Press]] |isbn=978-0198805854 |editor1-last=Shachar |editor1-first=Ayelet |series=Oxford Handbooks in Law |location=Oxford, New York |editor2-last=Bauboeck |editor2-first=Rainer |editor3-last=Bloemraad |editor3-first=Irene |editor4-last=Vink |editor4-first=Maarten}}</ref> and [[international relations]].<ref>{{Cite book |url=https://books.google.com/books?id=wERHBAAAQBAJ&q=Oxford+handbook+citizenship+migration&pg=PP1 |title=Migration Theory: Talking across Disciplines |last1=Brettell |first1=Caroline B.|last2=Hollifield |first2=James F. |date=2014 |publisher=[[Routledge]] |isbn=978-1317805984 |language=en |via=[[Google Books]]}}</ref> The political importance of [[diaspora]]s has also become in the 21st century a growing field of interest, as scholars examine questions of diaspora [[activism]],<ref>{{Cite journal |last=Bauböck |first=Rainer |date=2006-02-23 |title=Towards a Political Theory of Migrant Transnationalism |journal=[[International Migration Review]] |volume=37 |issue=3 |pages=700–723 |doi=10.1111/j.1747-7379.2003.tb00155.x |s2cid=55880642 |issn=0197-9183}}</ref> state-diaspora relations,<ref>{{Cite journal |last1=Délano |first1=Alexandra |last2=Gamlen |first2=Alan |date=July 2014 |title=Comparing and theorizing state–diaspora relations |journal=Political Geography |volume=41 |pages=43–53 |doi=10.1016/j.polgeo.2014.05.005 |issn=0962-6298 |hdl=2440/102448 |url=https://digital.library.adelaide.edu.au/dspace/bitstream/2440/102448/3/hdl_102448.pdf |hdl-access=free}}</ref> out-of-country [[voting]] processes,<ref>{{Cite journal |last=Lafleur |first=Jean-Michel |date=2014 |title=The enfranchisement of citizens abroad: variations and explanations |journal=Democratization |volume=22 |issue=5 |pages=840–860 |doi=10.1080/13510347.2014.979163 |hdl=2268/181007 |s2cid=143524485 |url=https://orbi.uliege.be/handle/2268/181007}}</ref> and states' [[soft power]] strategies.<ref>{{Cite journal |last=Tsourapas |first=Gerasimos |date=2018 |title=Authoritarian emigration states: Soft power and cross-border mobility in the Middle East |journal=[[International Political Science Review]] |volume=39 |issue=3 |pages=400–416 |doi=10.1177/0192512118759902 |s2cid=158085638 |url=http://pure-oai.bham.ac.uk/ws/files/48708510/Tsourapas_Authoritarian_emigration_states_IPSR_2018.pdf}}</ref> In this field, the majority of work has focused on immigration politics, viewing migration from the perspective of the country of destination.<ref>{{Cite book |url=https://books.google.com/books?id=oec_BAAAQBAJ&q=Oxford+handbook+citizenship+migration&pg=PR5 |title=Controlling Immigration: A Global Perspective |edition=3rd|last1=Hollifield |first1=James |last2=Martin |first2=Philip L. |last3=Orrenius |first3=Pia |date=2014 |publisher=[[Stanford University Press]] |isbn=978-0804787352 |language=en |via=[[Google Books]]}}</ref> With regard to [[emigration]] processes, political scientists have expanded on [[Albert O. Hirschman|Albert Hirschman's]] framework on '"voice" vs. "exit" to discuss how emigration affects the politics within countries of origin.<ref>{{Cite journal |last=Hirschman |first=Albert O. |date=January 1993 |title=Exit, Voice, and the Fate of the German Democratic Republic: An Essay in Conceptual History |journal=World Politics |language=en |volume=45 |issue=2 |pages=173–202 |doi=10.2307/2950657 |issn=1086-3338 |jstor=2950657 |s2cid=145574536}}</ref><ref>{{Cite journal |last=Brubacker |first=Rogers |date=1990 |title=Frontier theses: Exit, voice, and loyalty in East Germany |url=http://www.sscnet.ucla.edu/soc/faculty/brubaker/Publications/27_frontier_theses.pdf |archive-url=https://web.archive.org/web/20130124105756/http://www.sscnet.ucla.edu/soc/faculty/brubaker/Publications/27_frontier_theses.pdf |url-status=dead |archive-date=January 24, 2013 |journal=Migration World}}</ref>

== Historical theories ==

=== Ravenstein ===
{{unreferenced section|date=May 2020}}
Certain laws of [[social sciences|social science]] have been proposed to describe human migration. The following was a standard list after [[Ernst Georg Ravenstein]]'s proposal in the 1880s:

# every migration flow generates a return or counter migration.
# the majority of migrants move a short distance.
# migrants who move longer distances tend to choose big-city destinations.
# urban residents are often less migratory than inhabitants of rural areas.
# families are less likely to make international moves than young adults.
# most migrants are adults.
# large towns grow by migration rather than natural increase.
# migration stage by stage ([[step migration]]).
# urban, rural difference.
# migration and technology.
# economic condition.

=== Push and pull ===
Demographer Everett S. Lee's model divides factors causing migrations into two groups of factors: push and pull. Push factors are things that are unfavourable about the home area that one lives in, and pull factors are things that attract one to another host area.<ref>{{cite journal |jstor=2060063 |title=A Theory of Migration |journal=Demography |first=Everett S. |last=Lee |year=1966 |volume=3 |issue=1 |pages=47–57 |doi=10.2307/2060063 |s2cid=46976641 |doi-access=free}}</ref><ref>Guido Dorigo, and Waldo Tobler, "Push-pull migration laws." ''Annals of the Association of American Geographers'' 73.1 (1983): 1-17 [https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=9fc54ac2a2b06286b10ebf873e6a227b4bf43953 online]</ref>

'''Push factors''':
{{div col|colwidth=20em}}
* Not enough jobs
* Few opportunities
* Conscription (draft young men into army)
* Famine or drought
* Political fear of persecution
* Poor medical care
* Loss of wealth
* Natural disasters
* Death threats
* Desire for more political or religious freedom
* Pollution
* Poor housing
* Discrimination
* Poor chances of marrying
* War or threat of invasion
* Disease
{{Div col end}}
'''Pull factors''':
{{div col|colwidth=20em}}
* Job opportunities
* Better living conditions
* The feeling of having more political or religious freedom
* Enjoyment
* Education
* Better medical care
* Attractive climates
* Security
* Family links
* Industry
* Better chances of marrying
{{Div col end}}

=== Climate cycles ===
The modern field of climate history suggests that the successive waves of Eurasian nomadic movement throughout history have had their origins in [[Climate change (general concept)|climatic cycles]], which have expanded or contracted pastureland in Central Asia, especially [[Mongolia]] and to its west the [[Altai Mountains]]. People were displaced from their home ground by other tribes trying to find land that essential flocks could graze, each group pushing the next further to the south and west, into the highlands of [[Anatolia]], the [[Pannonian Plain]], into [[Mesopotamia]], or southwards, into the rich pastures of China. Bogumil Terminski uses the term "migratory domino effect" to describe this process in the context of [[Sea People]] invasion.<ref>{{cite book |last=Terminski |first=Bogumil |title=Environmentally-Induced Displacement. Theoretical Frameworks and Current Challenges |publisher=CEDEM, Université de Liège |date=2012}}</ref>

=== Food, sex, and security ===
The theory is that migration occurs because individuals search for food, sex and security outside their usual habitation; Idyorough (2008) believes that towns and cities are a creation of the human struggle to obtain food, sex and security. To produce food, security and reproduction, human beings must, out of necessity, move out of their usual habitation and enter into indispensable social relationships that are cooperative or antagonistic. Human beings also develop the tools and equipment to interact with nature to produce the desired food and security. The improved relationship (cooperative relationships) among human beings and improved technology further conditioned by the push and pull factors all interact together to cause or bring about migration and higher concentration of individuals into towns and cities. The higher the technology of production of food and security and the higher the cooperative relationship among human beings in the production of food and security and the reproduction of the human species, the higher would be the push and pull factors in the migration and concentration of human beings in towns and cities. Countryside, towns and cities do not just exist, but they do so to meet the basic human needs of food, security and the reproduction of the human species. Therefore, migration occurs because individuals search for food, sex and security outside their usual habitation. Social services in the towns and cities are provided to meet these basic needs for human survival and pleasure.<ref>Idyorough, 2008</ref>

=== Other models ===
* [[Zipf's law|Zipf's inverse distance law]] (1956)
* [[Gravity model of migration]] and the [[friction of distance]]
* [[Radiation law for human mobility]]
* [[Buffer theory]]
* Stouffer's [[theory of intervening opportunities]] (1940)
* [[Zelinsky Model|Zelinsky's Mobility Transition Model]] (1971)
* Bauder's regulation of [[labour economics|labour markets]] (2006): "suggests that the international migration of workers is necessary for the survival of industrialised economies...[It] turns the conventional view of international migration on its head: it investigates how migration regulates labour markets, rather than labour markets shaping migration flows."<ref>{{cite book |last=Bauder |first=Harald |title=Labour Movement: How Migration Regulates Labour Markets |publisher=[[Oxford University Press]] |edition= |date=2006 |isbn=978-0195180886}}</ref>

== Migration governance ==
By their very nature, international migration and displacement are transnational issues concerning the origin and destination States and States through which migrants may travel (often referred to as "transit" States) or in which they are hosted following displacement across national borders. And yet, somewhat paradoxically, the majority of migration governance has historically remained with individual states. Their policies and regulations on migration are typically made at the national level.<ref>McAuliffe, M. and A.M. Goossens. 2018. "Regulating international migration in an era of increasing interconnectedness". In: ''Handbook of Migration and Globalisation'' (A. Triandafyllidou, ed.). Edward Elgar Publishing, Cheltenham/Northampton, pp. 86–104.</ref> For the most part, migration governance has been closely associated with State sovereignty. States retain the power of deciding on the entry and stay of non-nationals because migration directly affects some of the defining elements of a State.<ref>For example, a permanent population and a defined territory, as per article 1 of the 1933 Montevideo Convention on the Rights and
Duties of States.</ref> Comparative surveys reveal varying degrees of openness to migrants across countries, considering policies such as visa availability, employment prerequisites, and paths to residency.<ref>{{Cite web |date=2022-02-05 |title=The CEO Agenda for an Era of Innovation Without Borders |url=https://www.bcg.com/en-us/publications/2022/innovation-without-borders-era-with-global-talent |access-date=2022-06-20 |website=United States – EN |language=en-US}}</ref>

Bilateral and multilateral arrangements are features of migration governance at an international level. There are several global arrangements in the form of international treaties in which States have reached an agreement on the application of human rights and the related responsibilities of States in specific areas. The 1966 [[International Covenant on Civil and Political Rights]] and the 1951 [[Convention Relating to the Status of Refugees]] (Refugee Convention) are two significant examples notable for being widely ratified. Other migration conventions have not been so broadly accepted, such as the International Convention on the Protection of the Rights of All Migrant Workers and Members of Their Families, which still has no traditional countries of destination among its States parties. Beyond this, there have been numerous multilateral and global initiatives, dialogues and processes on migration over several decades. The [[Global Compact for Migration|Global Compact for Safe, Orderly and Regular Migration]] (Global Compact for Migration) is another milestone, as the first internationally negotiated statement of objectives for migration governance striking a balance between migrants' rights and the principle of States' sovereignty over their territory. Although it is not legally binding, the Global Compact for Migration was adopted by consensus in December 2018 at a United Nations conference in which more than 150 [[United Nations Member States]] participated and, later that same month, in the [[United Nations General Assembly]] (UNGA), by a vote among the Member States of 152 to 5 (with 12 abstentions).<ref>IOM. 'Chapter 11: Recent developments in the global governance of migration: An update to the World Migration Report 2018.' [https://www.iom.int/wmr/2020/chapter/11 World Migration Report 2020. p. 291.] {{Webarchive|url=https://web.archive.org/web/20191221182355/https://www.iom.int/wmr/2020/chapter/11 |date=2019-12-21 }}</ref>

===Migration programs===
[[Colonialism]] and [[colonization]] opens up distant territories and their people to migration, having dominated what is identified as [[History of human migration#Modern history|modern migration]]. Colonialism globalized systems of migration and established ties effective until today.<ref name="o590">{{cite book | last=Mayblin | first=Lucy | title=Migration Studies and Colonialism | publisher=Polity | publication-place=Cambridge Medford (Mass.) | date=2021-01-26 | isbn=978-1-5095-4293-2 | page=}}</ref>

While classic modern colonialism relied on the subjugation and rule of local [[indigenous peoples]] by small groups of conquering [[metropole|metropolitan]] people, soon [[forced migration]], through [[slavery]] or [[indentured servitude]] supplanted the subjugated local indigenous peoples.
[[Settler colonialism]] later continued or established the rule of the colonizers through migration, particularly [[settler|settlement]].
Settler colonies relied on the attraction of [[Metropole|metropolitan]] migrants with the [[Manifest destiny|promise of settlement]] and increasingly outnumbering, [[ethnic cleansing|displacing]] or [[genocide|killing]] [[indigenous peoples]].

Only in the late stage of colonialism migration flows oriented towards the metropole instead of out or outside of it. After [[decolonization]] migration ties between former colonies to former metropoles have been continuing. Today's independent countries have developed selective or targeted [[foreign worker]] policies or [[Guest worker program|programs]], with the aim of boosting economies with skilled or relatively cheap new local labour, while discrimination and exploitation are often fed by [[ethnic nationalism|ethnic nationalist]] opposition to such policies.<ref name="i573">{{cite book | last=Gonzalez | first=Gilbert G. | title=Guest Workers Or Colonized Labor? | publisher=Routledge | publication-place=Boulder (Colo.) | date=2013 | isbn=978-1-61205-447-6 | page=}}</ref>

== See also ==
{{Div col|colwidth=16em}}
* [[Demographics of the world]]
* [[Early human migrations]]
* ''[[El Inmigrante]]'' – 2005 film
* [[Environmental migrant]]
* [[Existential migration]]
* [[Expatriate]]
* [[Feminisation of migration]]
* [[Genographic Project]]
* [[Humanitarian crisis]]
* [[International migration]]
* [[Illegal immigration]]
* ''[[Linguistic Diversity in Space and Time]]''
* [[Immigration to Europe]]
* [[List of diasporas]]
** [[Jewish diaspora]]
* [[Migrant literature]]
* [[Migration in China]]
* [[Most recent common ancestor]]
* [[Offshoring]]
* [[Political demography]]
* [[Queer migration]]
* [[Refugee roulette]]
* [[Religion and human migration]]
* [[Replacement migration]]
* [[Return migration]]
* [[Separation barrier]]
* [[Snowbird (person)]]
* [[Space colonization]]
* [[Timeline of maritime migration and exploration]]
* [[Cultural bereavement]]
{{Div col end}}

== References ==
{{Reflist}}

== Sources and further reading==

* Anderson, Vivienne. and Johnson, Henry. (eds) [https://www.routledge.com/Migration-Education-and-Translation-Cross-Disciplinary-Perspectives-on/Anderson-Johnson/p/book/9780367260347 Migration, Education and Translation: Cross-Disciplinary Perspectives on Human Mobility and Cultural Encounters in Education Settings]. New York: Routledge, 2020.
* Behdad, Ali. ''A Forgetful Nation: On Immigration and Cultural Density in the United States'', Duke UP, 2005.
* Brettell, Caroline B.; Hollifield, James F. ''Migration Theory''(Routledge, 2000) [''Migration Theory'' online]
* Chaichian, Mohammad. ''Empires and Walls: Globalisation, Migration, and Colonial Control'', Leiden: Brill, 2014. 
* [[Jared Diamond]], ''[[Guns, Germs, and Steel|Guns, germs and steel. A short history of everybody for the last 13'000 years]]'', 1997. 
* [[Miguel A. De La Torre|De La Torre, Miguel A.]], ''Trails of Terror: Testimonies on the Current Immigration Debate'', Orbis Books, 2009.
* Fell, Peter and Hayes, Debra. ''What are they doing here? A critical guide to asylum and immigration'', Birmingham (UK): Venture Press, 2007. {{ISBN?|date=December 2022}}
* Hanlon, Bernadette and Vicino, Thomas J. ''Global Migration: The Basics'', New York and London: Routledge, 2014. 
* de Haas, Hein. ''How Migration Really Works'', Penguin, 2023. 
* Harzig, Christiane, and Dirk Hoerder. ''What is migration history?'' (John Wiley & Sons, 2013) [https://arbor.revistas.csic.es/index.php/arbor/article/download/1226/1231/1228 online].
* Hoerder, Dirk. ''Cultures in Contact. World Migrations in the Second Millennium'', Duke University Press, 2002. {{ISBN?|date=December 2022}}
* Idyorough, Alamveabee E. "Sociological Analysis of Social Change in Contemporary Africa", Makurdi: Aboki Publishers, 2015.{{ISBN?|date=December 2022}}
* IOM World Migration Report, see [http://www.iom.int/wmr/ World Migration Report International Organization for Migration]
* Kleiner-Liebau, Désirée. ''Migration and the Construction of National Identity in Spain'', Madrid / Frankfurt, Iberoamericana / Vervuert, Ediciones de Iberoamericana, 2009. {{ISBN|978-8484894766}}.
* Knörr, Jacqueline. ''Women and Migration. Anthropological Perspectives'', Frankfurt & New York: Campus Verlag & St. Martin's Press, 2000. {{ISBN?|date=December 2022}}
* Knörr, Jacqueline. ''Childhood and Migration. From Experience to Agency'', Bielefeld: Transcript, 2005.{{ISBN?|date=December 2022}}
* Manning, Patrick. ''Migration in World History'', New York and London: Routledge, 2005. {{ISBN?|date=December 2022}}
* Miller, Mark & Castles, Stephen (1993). ''The Age of Migration: International Population Movements in the Modern World.'' Guilford Press. {{ISBN?}}
* ''Migration for Employment'', Paris: OECD Publications, 2004. {{ISBN?|date=December 2022}}
* ''OECD International Migration Outlook 2007'', Paris: OECD Publications, 2007.{{ISBN?|date=December 2022}}
* Pécoud, Antoine and Paul de Guchteneire (Eds): ''Migration without Borders, Essays on the Free Movements of People '' (Berghahn Books, 2007). {{ISBN?|date=December 2022}}
* Purohit, A. K. (ed.) ''The Philosophy of Evolution'', Yash Publishing House, Bikaner, 2010. {{ISBN|8186882359}}.
* [[Alexander Rubel|Rubel, Alexander]] (2024a). ''Migration in der Antike. Von der Odyssee bis Mohammed'' [Migration in Antiquity. From the Odyssey to Muhammad]. Freiburg: wbg Academic, {{ISBN|978-3-534-61013-6}}.
* Rubel, Alexander (2024b). ''Migration. Eine Kulturgeschichte der Menschheit'' [Migration. A cultural history of mankind]. Stuttgart: Kohlhammer, {{ISBN|978-3-17-044528-4}}.
* Abdelmalek Sayad. ''The Suffering of the Immigrant'', Preface by [[Pierre Bourdieu]], Polity Press, 2004. {{ISBN?|date=December 2022}}
* {{cite book |title=Who We Are And How We Got Here – Ancient DNA and the New Science of the Human Past |first=David |last=Reich |publisher=[[Pantheon Books]] |year=2018 |isbn=978-1101870327 }}
** {{cite news |last=Diamond |first=Jared |author-link=Jared Diamond|title=A Brand-New Version of Our Origin Story |url=https://www.nytimes.com/2018/04/20/books/review/david-reich-who-we-are-how-we-got-here.html |date=April 20, 2018 |work=[[The New York Times]] |access-date=April 23, 2018 }}
* Stalker, Peter. ''No-Nonsense Guide to International Migration'', New Internationalist, 2nd ed., 2008. {{ISBN?|date=December 2022}}
* White, Micheal (Ed.) (2016). ''International Handbook of Migration and Population Distribution''. Springer. {{ISBN?}}

=== Journals ===
* ''[[International Migration Review]]''
* ''[[Migration Letters]]''
* ''[https://onlinelibrary.wiley.com/journal/14682435 International Migration]'' {{ISSN|1468-2435}}
* ''[[Journal of Ethnic and Migration Studies]]''
* ''[[Review of Economics of the Household]]''

==External links==
{{Library resources box|by=no|onlinebooks=no|about=yes|wikititle=human migration}}
{{Commons category|Human migration}}
* {{Cite EB1911|wstitle=Civilization|volume=6|pages=403–410|first=Henry Smith|last=Williams|author-link=Henry Smith Williams}}
* {{Cite EB1911|wstitle=Migration|volume=18|pages=427–437|first=Hans Friedrich|last=Gadow|author-link=Hans Friedrich Gadow}}
* ''[https://worldmigrationreport.iom.int/ International Organization for Migration's World Migration Report 2020]''
* ''[https://www.oecd.org/els/internationalmigrationoutlook2007.htm OECD International Migration Outlook 2007]'' (subscription service)
* ''[https://migrationpolicycentre.eu/ Migration Policy Centre]''
* [https://www.iom.int/ iom.int International Organisation for Migration]
* [https://web.archive.org/web/20150905103734/https://www.cia.gov/library/publications/the-world-factbook/fields/2112.html CIA World Factbook], up-to-date statistics on net immigration by country
* [https://www.pstalker.com/?/migration/ Stalker's Guide to International Migration], a comprehensive interactive guide to modern migration issues, with maps and statistics
* [https://www.academia.edu/105625456/P_Peykovska_BULGARIA_ON_THE_MOVE/ Peykovska, P. Bulgaria on the Move. Migration, Refugees, Integration and Urbanisation... Sofia, 2022]
* [https://web.archive.org/web/20110322051627/http://www.unaoc.org/communities/migrationintegration/ Integration: Building Inclusive Societies (IBIS)], a UN Alliance of Civilisations online community on good practices of integration of migrants across the world
* [https://web.archive.org/web/20131129032557/http://www.accademiapulia.org/en/events/home-my-place-in-the-world---summer-exhibition-580.html The importance of migrants in the modern world]
* [http://www.business-of-migration.com Mass migration as a travel business]
* "[https://www.newseye.eu/case-studies/case-study-1-migration/return-migration-between-1850-and-1950 Return migration between 1850 and 1950]" by Sarah Oberbichler, Newseye projet (https://newseye.eu {{Webarchive|url=https://web.archive.org/web/20230613121204/https://www.newseye.eu/ |date=2023-06-13 }})
* [https://mappingaround.in/story-of-migration/ Story of migration]
* [https://www.migrant.ch/en/here-and-away-living-in-two-worlds/view.html Oral history of internal and external migration, a case study]

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{{DEFAULTSORT:Human Migration}}
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[[Category:Demographic economics]]
[[Category:Demography]]
[[Category:Genetic genealogy]]