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...

This paper shows that the results of Venables (1987) depend critically on the assumption that there are no fixed costs of trade. The introduction of fixed costs of exporting, while making the model more consistent with the empirical evidence, leads to the opposite conclusion that technological...

Using annual data 1963-1989 for technical progress in GECD countries (as measured by Solow residuals constructed using GECD data made internationally comparable through the use of purchasing power parties), the paper first shows that there has been significant international convergence in the...