Much of the modern long-run theory of international trade derives from what has come to be called the 2 x 2 or HeckscherOhlin model of production; and the rest of the theory derives from straightforward extensions of that model achieved by the accommodation of additional factors and products and...

The paper presents a general equilibrium model of a pure exchange economy with stochastic endowment in which speculation 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 banning...