Good question. I had presumed that it was in Pigou's _Economics of Welfare_, 1922, but I could not find it in there. It does not seem to be in my copy of Marshall either, nor does it appear in Schumpeter's 1954, _History of Economic Analysis_, nor even in Richard Musgrave standard pub fin text from 1959, _The Theory of Public Finance_. I have even scanned Coase's famous 1961 article, "The Problem of Social Cost" and do not see it even there. I note that he and Pigou are concerned with "divergences between private and social marginal product," which we would now claim to be due to externalities. But as near as I can tell, neither uses the term. So, anybody out there know who did introduce this term into standard economics? I doubt they got it from Marx, but who knows? Barkley Rosser On Wed, 11 Dec 1996 15:18:41 -0800 (PST) "David N. Smith" <[EMAIL PROTECTED]> wrote: > Does anyone know the exact origin of the term "externalities"? I ask > because I'm struck by the etymological symmetry of this term and Marx's > "entausserung," which is usually rendered "alienation" but is literally > externalization. (Entausserung is Marx's main term for alienation in > Capital; in his early manuscripts he spoke often of Entfremdung, i.e. > estrangement, but this became far less common later.) > > This is a very minor issue -- but it seems safe to say, at least, that > entausserung has many negative externalities as corollaries... > > Thanks, > > David Smith > > David N. Smith > Department of Sociology > University of Kansas > Lawrence KS 66045 > (913) 842-2793 > > -- Rosser Jr, John Barkley [EMAIL PROTECTED]