The paper presents a general equilibrium model of a pure exchange economy with stochastic endowments, in which speculation in the forward market is profitable and stabilizes prices but is useless from a welfare point of view. Reconciling the Siegel paradox with the theory of incomplete markets,...

We show that the Kemp-Wan proposition concerning the formation of customs union holds under conditions of imperfect competition and increasing returns.

The theory of involuntary international transfers (war indemnities) has been constructed on the assumption that the donor and recipient are completely indifferent to each other's well-being. The assumption is hard to justify since usually the transfers closely follow periods during which the...