This paper argues that the conventional definition of the elasticity of complementarity is not well suited to deal with the case of increasing returns. It proposes a slightly different formula, that uses a distance function formulation instead of a production function. The proposed definition...

I. Introduction -- 1.1 Scope and significance -- 1.2 Methodological considerations -- 1.3 An outline of the remaining chapters -- II. Some elements from the neoclassical research programme of the firm -- 2.1 Introduction -- 2.2 Keynesian theories of the firm -- 2.3 The neoclassical programme --...

This paper deals with recent proposals concerning temporary immigration visas as a means to combat the problem of illegal immigration. We set up a simple two-period model of international migration between a poor South and a rich North with temporary visas issued for one period. Because of...