| Résumé: | In 1980, the metropolitan region known as "Grande Sao Paulo" consisted of 37 municipalities, containing 11% of the Brasilian population and 51% of the state's population. Its rapid growth during the last decades is closely linked to migration. This massive growth and demographic concentration brought about a change in the internal distribution of the population. In this context, intrametropolitan migratory patterns play an important role, because they delineate the transference of thousands of individuals from the center of town (the capital) out to its surrounding municipalities and to more distant settlements. Based on the 1980 census, the study attempts to provide a general overview of this type of migration, using information regarding previous place of residence -data included for the first time in a Brasilian census-, which helps to establish the internal, intermunicipal, migratory flow. The article also presents certain aspects related to volume, direction and reasons for these movements as well as some of the characteristics of influencing factors. From the empirical analysis, the author suggests that at least two major sets of motivations (or constraints) contribute to a move from one municipality to another: those related to the use of urban land, in particular those related to housing availability; and those due to a reorganization in economic activity and, therefore, a reorganization of the labor force within the metropolitan area.
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