Joan Robinson had no idea about what Keynes was talking about in the General Theory with respect to (a) Keynes's Aggregate Supply Curve of Chapter 20,which is a locus of all possible, multiple equilibrium results (Full employment, underemployment, involuntary unemployment), his Liquidity...

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...