March 2, 2001 Eric Rasmusen notes, erasmuse@indiana.edu Http://Php.Indiana.edu/~erasmuse Francis Edgeworth, "The Mathematical Economics of Professor Amoroso," Economic Journal, 30: 400-407 (September 1922). ophelimity n. economic satisfaction. Kenneth Arrow has written that this term was coined by Pareto. "For it became clear to Vilfredo Pareto (1927, originally published in Italian in 1906) that the cardinal concept of a utility function was unnecessary as an explanation of demand behavior... The indfference surfaces can be thought of (at least ideally) as observable entities. To them can be associated a utility function (Pareto tried to introduce the new term, *ophelimity*, presumably to eliminate the cardinal overtones, but the neologism did not last) that will ratinalize the indifference surfaces..." p. 17, Kenneth Arrow, "Contributions to Welfare Economics," pp. 15-31 of *Paul Samuelson and Modern Economic Theory*, edited by E. Cary Brown and Robert Solow, McGraw-Hill, 1983.