Editing Fleeming Jenkin (section)

===Pioneer of the supply and demand graphic===
In 1870, Jenkin published the essay "On the Graphical Representation of the Laws of Supply and Demand and their Application to Labour,"<ref>Fleeming Jenkin, 1870. "The Graphical Representation of the Laws of Supply and Demand, and their Application to Labour," in Alexander Grant, ed., ''Recess Studies'', Edinburgh. ch. VI, pp. 151–85. Edinburgh. Scroll to chapter [https://books.google.com/books?id=NC5BAAAAIAAJ link.]</ref> in which he "introduced the diagrammatic method into the English economic literature" – an early published instance of [[supply and demand]] curves.<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> His treatment extended beyond earlier treatments on the Continent (not apparently known by him), complete with [[comparative statics]] (a change in equilibrium from a shifts of a curve), [[welfare economics|welfare analysis]], application to the labour market, and market-period and long-run distinctions.<ref>Thomas M. Humphrey, 1992. "Marshallian Cross Diagrams and Their Uses before Alfred Marshall," ''Economic Review'', Mar/Apr, Federal Reserve Bank of Richmond, pp. [https://www.richmondfed.org/publications/research/economic_review/1992/er780201 16–21.] </ref> It was later popularised by [[Alfred Marshall]] and remains arguably the most famous graphic in economics.{{citation needed |date=December 2012}}