Mathematical Economics Lectures given at the 2nd 1986 Session of the Centro Internazionale Matematico Estivo (C.I.M.E.) held at Montecatini Terme, Italy June 25 – July 3, 1986 - Ambrosetti, Antonio 1944-2020; Gori, Franco 1944-; Lucchetti, Roberto (Springer, 1988)