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...

It is shown that, whatever the multiplicity of the integrated world equilibrium, (i) factor prices are equalized if and only if the distribution of primary factors between trading countries can be represented by a point in or on the boundary of a certain convex subset of R[superscript m], where...

Consider the optimal time path of a tax on capital income, the proceeds of which are transferred to labor in a lump sum. It is known from earlier open-loop formulations that, if the optimal rate of tax converges to a point, it converges to zero, implying that, in the long run, a tax on capital...

The paper describes a class of imperfectly competitive world economies for which factor price equalization is inevitable. Specifically, it is shown that factor price equalization must prevail if the trading economies differ at most in scale, if they share a constant-returns no-joint-products...