We develop a model where the unemployed workers in the city can find a job either directly or through weak or strong ties. We show that, in denser areas, individuals choose to interact with more people and meet more random encounters (weak ties) than in sparsely populated areas. We also...

Based on the realities of the cities of São Paulo, Brasilia, Fortaleza and Belém, the author explores the dynamics that characterize the activities of the national economy in the period of globalization. As big city economies are increasingly based in information and finance activities, work...