Editing Round number (section)

== Round number bias ==
Round number bias is the [[psychological]] tendency to prefer round numbers over others,<ref name=":0">{{Cite web|last=Bikos|first=Konstantin|date=|title=When Did the 21st Century Start?|url=https://www.timeanddate.com/counters/mil2000.html|url-status=live|archive-url=https://web.archive.org/web/20201218094222/https://www.timeanddate.com/counters/mil2000.html|archive-date=18 December 2020|access-date=29 December 2020|website=timeanddate.com}}</ref><ref name=":1">{{Cite web|last=Vižintin|first=Žiga|date=6 February 2018|title=Why Five and Not Eight? How Round Number Bias Can Reduce Your Nest Egg|url=https://behavioralscientist.org/five-not-eight-round-number-bias-can-reduce-nest-egg/|url-status=live|archive-url=https://web.archive.org/web/20200804133150/https://behavioralscientist.org/five-not-eight-round-number-bias-can-reduce-nest-egg/|archive-date=4 August 2020|access-date=29 December 2020|website=Behavioral Scientist}}</ref> which is passed onto a person through socialization.<ref>{{Cite web|last=|first=|date=19 June 2017|title=How Round Number Bias and Psychological Pricing Affect Your Gains and Spending|url=https://dqydj.com/round-number-bias-psychological-pricing/|url-status=live|archive-url=https://archive.today/20201229212147/https://dqydj.com/round-number-bias-psychological-pricing/|archive-date=29 December 2020|access-date=29 December 2020|website=Don't Quit Your Day Job}}</ref> Round numbers are also easier for a person to remember, process, and perform [[mathematical operations]] on.<ref name=":1" />

Round number bias has been observed mainly in retail and [[Grocery store|grocery]], where prices are often just slightly less than a rounded number (ex. $9.99 or $9.95), in investments, including [[crowdfunding]], in the [[real estate market]] through [[mortgages]], and number [[milestone]]s.<ref name=":12">{{Cite web|last=Vižintin|first=Žiga|date=6 February 2018|title=Why Five and Not Eight? How Round Number Bias Can Reduce Your Nest Egg|url=https://behavioralscientist.org/five-not-eight-round-number-bias-can-reduce-nest-egg/|url-status=live|archive-url=https://web.archive.org/web/20200804133150/https://behavioralscientist.org/five-not-eight-round-number-bias-can-reduce-nest-egg/|archive-date=4 August 2020|access-date=29 December 2020|website=Behavioral Scientist}}</ref><ref>{{Cite journal|last1=Hervé|first1=Fabrice|last2=Schwienbacher|first2=Armin|date=January 2018|title=Round-Number Bias in Investment: Evidence from Equity Crowdfunding|url=https://www.cairn.info/revue-finance-2018-1-page-71.htm?ref=doi|journal=[[Finance (journal)|Finance]]|volume=39|page=71|doi=10.3917/fina.391.0071|archive-url=https://archive.today/20201229212548/https://www.cairn.info/revue-finance-2018-1-page-71.htm?ref=doi|archive-date=29 December 2020|via=cairn.info|access-date=21 January 2021|url-status=live|doi-access=free}}</ref><ref>{{Cite journal|last=Guo|first=Tiansheng|title=The Effect of Round Number Bias inU.S. and Chinese Stock Markets|url=http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.670.6061&rep=rep1&type=pdf|journal=[[Michigan Journal of Business]]|pages=41–42|citeseerx=10.1.1.670.6061|archive-url=https://archive.today/20201229212735/http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.670.6061&rep=rep1&type=pdf|archive-date=29 December 2020|via=[[CiteSeerX]]|access-date=21 January 2021|url-status=live}}</ref><ref>{{Cite journal|last1=L. Ross|first1=Stephen|last2=Zhou|first2=Tingyu|date=3 November 2020|title=Documenting Loss Aversion using Evidence of Round Number Bias|url=https://media.economics.uconn.edu/working/2020-17.pdf|journal=[[University of Connecticut]]|page=2|archive-url=https://web.archive.org/web/20201229213136/https://media.economics.uconn.edu/working/2020-17.pdf|archive-date=29 December 2020|via=uconn.edu}}</ref>

Round numbers are often used when estimating the time taken to complete a task.<ref>{{cite web|url=https://shape-of-code.coding-guidelines.com/2020/05/31/estimating-in-round-numbers/|title=Estimating in round numbers|accessdate=9 August 2021}}</ref>