As to Kalecki's role in the use of the term macrodynamics, Barkley is right in his latest post: Kaleci almost surely picked it up from Frisch. In fact, in a footnote to his 1935 Econometrica paper, Kalecki points out that "The term "macrodynamic" was first applied by Professor Frisch in his work "Propagation problems and impulse problems in dynamics" (Economic Essays in Honour of Gustav Cassel, London, 1933), to determine processes connected with the functioning of the economic system as a whole, disregarding the details of disproportionate development of special parts of that system" (p. 327). As to macrodynamics and macroeconomics, there is of course a big difference: the first applies to dynamic systems (that is, in Frisch's own terminology, systems where the state at one instant -- wich includes values of the variable at different times-- determins the successive states), while macroeconomics may well include static systems --e.g., Keynes's. If I am allowed to say so, my paper cited by Barkley, "Formal modeling vs. insight in Kalecki's theory of business cycles", is now published in Research in the History of Economic Thought and Methodology, vol. 24-A, 2006, pp. 1-48. Daniele Besomi