We estimate productivities at the sector level for 72 countries and 5 decades, and examine how they evolve over time in both developed and developing countries. In both country groups, comparative advantage has become weaker: productivity grew systematically faster in sectors that were initially...

In developing countries, informal firms (those that are not registered with the government) account for about half of all economic activity. We consider three broad views of the role of such firms in economic development. According to the romantic view, these firms would become the engine of...

In this paper I use a cross country data set to analyze the relationship between trade orientation, trade distortions and growth. I first develop a simple endogenous growth model that emphasizes the process of technological absorption in small developing countries. According to this model...