We analyze recent contributions to growth theory based on the model of expanding variety of Romer (1990). In the first part, we present different versions of the benchmark linear model with imperfect competition. These include the 'labequipment' model, labor-for-intermediates' and 'directed...

We review the micro-level evidence on the effects of trade and investment liberalization in the developing world. The main findings can be summarized as follows. 1) There is evidence of trade-induced productivity gains; 2) These gains mainly stem from the intra-industry real-location of...

We review the micro-level evidence on the effects of trade and investment liberalization in the developing world. We focus, in particular, on the effects of the 1991 trade reform in India, since it provides an excellent controlled experiment in which the effects of a drastic trade regime change...