We develop a model of international trade with increasing returns to scale by taking into account the possibility of cooperation among agents in an egalitarian economy. It is shown that each country gains from trade in a trading world in which there are arbitrary numbers of...

The classical gains-from-trade conjecture was finally given a thorough Arrow-Debreu proof in 1972. Since then, the proposition has been repeatedly challenged. Some of the challenges rest on grounds which in no respect violate Arrow-Debreu assumptions. Those challenges are therefore without...

The Frankel, Romer and Lucas theories of endogenous growth rest on the assumptions of knowledge-based externalities and price-taking representative agents. It is argued that, in a context of long-run growth, these assumptions are mutually incompatible, that representative agents will cooperate...

We offer a new proof of the maximum principle, by using the envelope theorem that is frequently used in the standard microeconomic theory. Copyright Springer-Verlag Berlin Heidelberg 2003

The Hicks-Ikema theorem, that a uniform expansion of a trading country's production set must benefit its trading partner if the preferences of the expanding country are homothetic, has been demonstrated under assumptions of the Lerner-Samuelson kind. It is shown here that the theorem remains...

This paper presents a pair of new equivalent conditions for a given n x n matrix of distributive shares to satisfy the Stolper-Samuelson criterion. Specifying n as four and making use of barycentric coordinates, the author gives geometric characterization to the equivalent conditions. Copyright...