----------------- HES POSTING ----------------- David Laidler has the answer (D H Robertson, "Mr Keynes and the Rate of Interest", 1940), together with an excellent discussion, in his "Fabricating the Keynesian Revolution", Cambridge University Press, p. 286. Roger Sandilands University of Strathclyde Glasgow, UK ------------ FOOTER TO HES POSTING ------------ For information, send the message "info HES" to [log in to unmask]