We develop a simple endogenous growth model with two countries, North that innovates, and South. As in Dinopoulos and Segerstrom (1999), trade liberalization raises wage inequality through stimulating R&D activity. However, the consequences of North-South trade become ambiguous when a service...

Aghion and coauthors put forward a model which exhibits an inverted-U-shape relationship between innovation and competition: competition may increase the innovation profit margin for firms close to the technological frontier (since they escape competition) but strong competition could also...