[Urban differential growth and migration in Argentina: changes in trends since 1970].

The role of migration in urban growth in Argentina is analyzed over the period 1951-1991. "Three cohorts or groups are considered, based on the population each agglomeration had in 1951: under 50,000 inhabitants, over 50,000 but smaller than Greater Buenos Aires and, finally, Greater Buenos Aires. Analysis of available data shows that trends in growth changed since 1970, with a lower negative migration balance in the first cohort, a definite, stronger growth of the second one and a slower growth of Greater Buenos Aires on account of a reduction in the migration balance. Variations in rhythm for the three cohorts are considered and compared to the overall development in the country." (SUMMARY IN ENG)