The authors investigate the consequences of imposing additivity on community preferences. They show that there are import ant implications of additive community preferences that are not implied. by the additivity of a single consumer's preferences. In particular, th ey show that imposing...

Although models with factor price equalization are used frequently in both theoretical and applied research in international economics, only sufficient conditions for factor price equalization have been presented in the literature. In this paper, the authors present necessary and sufficient...