This article examines the validity of a gains from trade proposition in a world in which the direction of technological change is determined endogenously. We first give an extreme example in which a part of the world that would smoothly develop under autarchy forever remains underdeveloped under...

This article studies the long-run direction of technological change in an endogenous growth model. Development is modeled as a sequence of temporary equilibria in an overlapping generations framework. We introduce a concept of `long-run efficient development' which excludes persistent...

This paper explores the impact of insatiable needs on the sustainability and the direction of technological change and economic growth. In a simple framework it is shown that growth can only be sustained if either the opportunity costs of research are small at low levels of research or if some...

In this article we show how absolute poverty and per capita growth can be sustained simultaneously in a fully integrated world economy even in the absence of population growth. In contrast to the literature we use a model of endogenously sustained growth in which not only the intensity of...