The papers collected here represent the growing range of issues addressed by both economists and psychologists. The collection's main objectives are twofold: to broaden the behavioral basis of economic analysis at a social level and to expand the limits of economic theory's applicability. The contributors attempt to find a common ground of analysis that bridges disciplines and to establish a framework that integrates psychology's contributions with economics. They explore mathematical models of psychological functions, the use of psychoanalytic theory in economics, entrepreneurial behaviour, and the impact of personality types on organizations.