================= HES POSTING ================= To Professor Barkley Rosser: If you are interested in the actual usage of the term 'externality', Ronald Coase has a footnote on it in his _The Firm, The Market and The Law_ (Chicago: University of Chicago Press, 1988): "The earliest uses of the term 'externality' that I have come across are contained in Samuelson's review of de Graaf's _Theoretical Welfare Economics_in the_Economic Journal_(September 1958): 539-41, and in his article 'Aspects of Public Expenditure Theories,' _The Review of Economics and Statistics_(November 1958): 332-38. This article was a slight revision of paper delivered in December,1955" (23 n35). I hope this would be of help. Masazumi Wakatabe [log in to unmask] ============ FOOTER TO HES POSTING ============ For information, send the message "info HES" to [log in to unmask]