----------------- HES POSTING ----------------- >Can anyone tell me how, in the past, economists have defined the idea of an industry? Alternative words that have been used are 'sector','branch of production' and 'industrial sector'< The is a large older theory literature that emerged as the statistical categories were being developed. Some of the controversies here swirled around, and were in response to, Triffin, Robert. Monopolistic competition and general equilibrium theory / Cambridge : Harvard University Press, 1940. There is a full discussion of these issues in Weintraub, Sidney. Price theory. New York, Pitman Pub. Corp. [1949] E. Roy Weintraub Duke University ------------ FOOTER TO HES POSTING ------------ For information, send the message "info HES" to [log in to unmask]