----------------- HES POSTING ----------------- A colleague of mine sent me the following query. Can anyone help? "I was wondering when the concepts of demand and supply curves (in the partial equilibrium framework) appeared in economics. The clearest and the most beautiful classical exposition of the concepts, that I know of, is Marshall. However, I find it improbable that the concepts appeared as late as Marshall. I just checked Schumpeter and Blaug, but they do not seem to discuss this explicitly. I was wondering whether you might know the answer to my question or you might be able to indicate some source where I could look for the answer." Stephen Cullenberg University of California--Riverside ------------ FOOTER TO HES POSTING ------------ For information, send the message "info HES" to [log in to unmask]