literature. In contrast, studies on relative location tend to be weakly linked to theory, but apply relatively sophisticated … appropriateness of such models, and identify areas of potential concern. The rather weak linkage between theory and operational models …

We present a multi-country theory of economic growth and R&D-driven technological progress in which countries are … countries it exchanges knowledge with. The diffusion of knowledge throughout the world explains a period of increasing world …. Knowledge diffusion through a Small World network produces an extraordinary diversity of country growth performances, including …

We present a multi-country theory of economic growth in which countries are connected by a network of mutual knowledge … country depends on its connections to the rest of the world and on the human capital of the countries it is exchanging … knowledge with. We show how the diffusion of knowledge through the world explains the evolution of global income inequality. It …