Economic theories of systems of cities explain why production and consumption activities are concentrated in a number of urban areas of different sizes and industrial composition rather than uniformly distributed in space. These theories have been successively influenced by four paradigms: (i)...

Economic theories of systems of cities explain why production and consumption activities are concentrated in a number of urban areas of different sizes and industrial composition rather than uniformly distributed in space. These theories have been successively influenced by four paradigms: (i)...

In this paper we develop a North-South trade model in which the South produces food and the North produces both food and a high-tech good. Food production is undertaken by unskilled workers, while the high-tech product is made only by horizontally differentiated skilled workers. Owing to the...