Editing Supply and demand (section)

==History==
The 256th couplet of [[Tirukkural]], which was composed at least 2000 years ago, says that "if people do not consume a product or service, then there will not be anybody to supply that product or service for the sake of price".<ref>C Chendroyaperumal (2010). [https://papers.ssrn.com/sol3/papers.cfm?abstract_id=1545247 ''The First Laws in Economics and Indian Economic Thought – Thirukkural'']</ref>

According to Hamid S. Hosseini, the power of supply and demand was understood to some extent by several early Muslim scholars, such as fourteenth-century Syrian scholar [[Ibn Taymiyyah]], who wrote: "If desire for goods increases while its availability decreases, its price rises. On the other hand, if availability of the good increases and the desire for it decreases, the price comes down."<ref name=Hosseini>{{cite book |title=A Companion to the History of Economic Thought |chapter=Contributions of Medieval Muslim Scholars to the History of Economics and their Impact: A Refutation of the Schumpeterian Great Gap |last=Hosseini |first=Hamid S. |editor=Biddle, Jeff E. |editor2=Davis, Jon B. |editor3=Samuels, Warren J. |year=2003 |publisher=Blackwell |location=Malden, MA |isbn=978-0-631-22573-7 |doi=10.1002/9780470999059.ch3 |pages=28–45 [28 & 38]}} (citing Hamid S. Hosseini, 1995. "Understanding the Market Mechanism Before Adam Smith: Economic Thought in Medieval Islam," ''History of Political Economy'', Vol. 27, No. 3, 539–61).</ref>
{{Rquote|right|If desire for goods increases while its availability decreases, its price rises. On the other hand, if availability of the good increases and the desire for it decreases, the price comes down.|[[Ibn Taymiyyah]]|<ref name=Hosseini />}}
[[File:AdamSmith.jpg|upright|150px|thumb|Adam Smith]]

Shifting focus to the English etymology of the expression, it has been confirmed that the phrase 'supply and demand' was not used by English economics writers until after the end of the 17th century.<ref>{{cite journal |last1=Thweatt |first1=W.O. |title=Origins of the terminology, supply and demand. |journal=Scottish Journal of Political Economy |date=1983 |volume=30 |issue=3 |pages=287–294|doi=10.1111/j.1467-9485.1983.tb01020.x }}</ref> 
In [[John Locke]]'s 1691 work ''Some Considerations on the Consequences of the Lowering of Interest and the Raising of the Value of Money'',<ref>John Locke (1691) [http://www.marxists.org/reference/subject/economics/locke/contents.htm ''Some Considerations on the consequences of the Lowering of Interest and the Raising of the Value of Money'']</ref> Locke alluded to the idea of supply and demand, however, he failed to accurately label it as such and thus, he fell short in coining the phrase and conveying its true significance.<ref name="Groenewegen P. 2008">Groenewegen P. (2008) ‘Supply and Demand’. In: Palgrave Macmillan (eds) The New Palgrave Dictionary of Economics. Palgrave Macmillan, London</ref>  Locke wrote: “The price of any commodity rises or falls by the proportion of the number of buyer and sellers” and “that which regulates the price... [of goods] is nothing else but their quantity in proportion to [the] Vent.”<ref name="Groenewegen P. 2008"/>  Locke's terminology drew criticism from John Law. Law argued that,"The Prices of Goods are not according to the quantity in proportion to the Vent, but in proportion to the Demand."<ref>{{cite book |last1=Law |first1=J. |title=Money and Trade Considered with a Proposal for Supplying the Nation with Money |date=1705 |publisher=Anderson |location=Edinburgh}}</ref> From Law the demand part of the phrase was given its proper title and it began to circulate among "prominent authorities" in the 1730s.<ref name="Groenewegen P. 2008"/> In 1755, [[Francis Hutcheson (philosopher)|Francis Hutcheson]], in his ''A System of Moral Philosophy'', furthered development toward the phrase by stipulating that, "the prices of goods depend on these two jointly, the Demand... and the Difficulty of acquiring."<ref name="Groenewegen P. 2008"/>

It was not until 1767 that the phrase "supply and demand" was first used by Scottish writer [[James Denham-Steuart]] in his ''Inquiry into the Principles of Political Economy.'' He originated the use of this phrase by effectively combining "supply" and "demand" together in a number of different occasions such as [[price determination]] and [[Competitor analysis|competitive analysis]]. In Steuart's chapter entitled "Of Demand", he argues that "The nature of Demand is to encourage industry; and when it is regularly made, the effect of it is, that the supply for the most part is found to be in proportion to it, and then the demand is simple". It is presumably from this chapter that the idea spread to other authors and economic thinkers. [[Adam Smith]] used the phrase after Steuart in his 1776 book ''[[The Wealth of Nations]]''. In ''The Wealth of Nations'', Smith asserted that the supply price was fixed but that its "merit" (value) would decrease as its "scarcity" increased, this idea by Smith was later named the law of demand. In 1803, Thomas Robert Malthus used the phrase "supply and demand" twenty times in the second edition of the ''Essay on Population''.<ref name="Groenewegen P. 2008"/> 
And [[David Ricardo]] in his 1817 work, ''[[Principles of Political Economy and Taxation]]'', titled one chapter, "On the Influence of Demand and Supply on Price".<ref name=Humphrey>{{Cite journal
| issue = Mar/Apr
| pages = 3–23
| last = Humphrey
| first = Thomas M.
| title = Marshallian Cross Diagrams and their Uses before Alfred Marshall
| journal = Economic Review
| date = 1992
| url = https://www.richmondfed.org/-/media/richmondfedorg/publications/research/economic_review/1992/pdf/er780201.pdf
| access-date = 2019-07-27}}</ref> In ''Principles of Political Economy and Taxation'', Ricardo more rigorously laid down the idea of the assumptions that were used to build his ideas of supply and demand. In 1838, [[Antoine Augustin Cournot]] developed a mathematical model of supply and demand in his ''Researches into the Mathematical Principles of Wealth'', it included diagrams. It is important to note  that the use of the phrase was still rare and only a few examples of more than 20 uses in a single work have been identified by the end of the second decade of the 19th century.<ref name="Groenewegen P. 2008"/>

During the late 19th century the marginalist school of thought emerged. The main innovators of this approach were [[William Stanley Jevons|Stanley Jevons]], [[Carl Menger]], and [[Léon Walras]]. The key idea was that the price was set by the subjective value of a good at the margin. This was a substantial change from Adam Smith's thoughts on determining the supply price.

In his 1870 essay "On the Graphical Representation of Supply and Demand", [[Fleeming Jenkin]] in the course of "introduc[ing] the diagrammatic method into the English economic literature"  published the first drawing of supply and demand curves in English,<ref>A.D. Brownlie and M. F. Lloyd Prichard, 1963. "Professor Fleeming Jenkin, 1833–1885 Pioneer in Engineering and Political Economy," ''Oxford Economic Papers'', NS, 15(3), p. 211.</ref> including [[comparative statics]] from a shift of supply or demand and application to the labor market.<ref>Fleeming Jenkin, 1870. "''The Graphical Representation of the Laws of Supply and Demand, and their Application to Labour,''" in Alexander Grant, ed., (Scroll to chapter) [https://books.google.com/books?id=NC5BAAAAIAAJ ''Recess Studies'', ch. VI, pp. 151–85.] Edinburgh: Edmonston and Douglas</ref> The model was further developed and popularized by [[Alfred Marshall]] in the 1890 textbook ''[[Principles of Economics (Marshall)|Principles of Economics]]''.<ref name="Humphrey" />