The mathematical(logical), technical, theoretical exposition of the multiplier given in chapter 10 of the General Theory by Keynes is identical to the exposition given by Keynes in chapter 26 of the A Treatise on Probability in footnote 1 on page 315. The mathematical theory requires that the...

An enduring myth accepted by all Orthodox and heterodox economists is that it was Richard Kahn who discovered and originated the concept of the multiplier. Kahn then supposedly showed Keynes how the multiplier concept could be specified mathematically so as to provide hard support for Keynes's...

The myth that R. Kahn taught J M Keynes the multiplier,so that without Kahn's contribution,there would have been no possibility of Keynes having written the General Theory in 1936,like the myth that there is no IS-LM mathematical model in the General Theory , can be traced to deliberate canards...

There is a very major problem with Shackle's 1951 paper in the Economic Journal concerning the history of the multiplier. Shackle makes claims in his 1951 article, that were later repeated many times in other Shackle articles, that lead a reader to the conclusion that Kahn invented and developed...

J M Keynes had already completely developed the technical, mathematical and logical framework of analysis for the concept of the multiplier in his A Treatise on Probability in 1921 long before Richard Kahn came to Cambridge in 1927 at the age of 22. However, Keynes did not have the time or...

R J Kent's 2007 History Of Political Economy article ends with the claim that “…But there certainly are many unanswered questions concerning Keynes's role in the development of the multiplier…”. Pace Kent, anyone who has read Keynes's chapter 26 in the A Treatise on Probability in 1921...

Keynes had completely developed the Logical Theory of the Multiplier in his A Treatise on Probability in 1921 in chapter 26 on page 315 and in footnote 1 on page 315. This same analysis appears in his second, 1908, Fellowship Dissertation at Cambridge University. Keynes, however, had no interest...

Dennis Robertson had no understanding of how J M Keynes's Multiplier concept was based on the use of differential calculus techniques that required one to take the mathematical limit of an infinite, decreasing, geometric series. Robertson failed to see that the derivative concept requires that...