Migration decisions among settler families in the Ecuadorian Amazon: the second generation.

The authors use survey data collected in 1990 from 418 household heads of recent settlements in the Ecuadorian Amazon to study the extent of and reasons for out-migration of the settlers' children. "Our research identifies the types and incidence of out-migration of young adults from settler households in the Ecuadorian Amazon, as well as the effects of individual and household-level factors of out-migration. Important gender differences in both the levels and patterns of migration and in the factors affecting migration decisions are documented."

[Polarization reversal in the development of Brazilian metropolises? An analysis based on demographic indicators, using the example of Sao Paulo]. / Polarization reversal in der Entwicklung brasilianischer Metropolen? Eine Analyse anhand demographischer Indikatoren am Beispiel von Sao Paulo.

"Using the example of Sao Paulo, this paper addresses itself to the question of how far the decrease in growth rates one observes in large Brazilian metropolises can be interpreted as a process of polarization reversal. The analysis is carried out on the basis of demographic data from small area units, which include the results from the most recent 1991 census. Although it had already been possible in the 1970s to discern first indications of such a process setting in, in the decade 1981-91 indicators of population growth and migration balances agree in pointing to a polarization reversal." (SUMMARY IN ENG)

[A new migratory horizon in Central Mexico: 1970-1990]. / Nuevo horizonte de la migracion en el centro de Mexico: 1970-1990.

"During the last few decades migration in Central Mexico has undergone important changes. Not only have populations been moving increasingly towards the periphery and decreasingly towards the center, but those originally living in the center are also moving to the immediate periphery. This behavior allows us to claim that Central Mexico is undergoing a process of deconcentration or suburbanization. This study describes the way in which such a process has developed and the situation of geographical entities within that process. Analysis of the new regional configuration takes into account demographic growth and the direction and characteristics of migration in the Mexico City Metropolitan Area and its surrounding states during the last twenty years." (SUMMARY IN ENG)

Migrant fertility differentials in Ecuador.

PIP: The effects of migration on fertility in Ecuador were analyzed by subdividing migrant categories into permanent-, return-, circular-, and non-migrants, and context factors into 6 socioeconomic and agrarian variables. The study is introduced with a conceptual framework that explains personal intermediate variables and their influence on fertility in terms of demographic transition theory, and then defines the influences of selection for fertility, disruption of marital unions, and socialization into fertility norms at the origin vs. assimilation of norms at the destination. Migrants are usually better educated, younger and upwardly mobile, all selecting for lower fertility. Migration disrupts formation of marital unions, and causes separation of spouses, lowering fertility. Data for this study were from the 1974 and 1982 Ecuadorian Population Censuses. The contextual variables analyzed were urban/rural; manufacturing/agricultural; mineral extraction/economic recession; long/recent agricultural settlement; domestic/export crop; and large/medium sized farm. The analysis of personal attributes showed that fertility increased over the range on non-migrants through circular-, return- to permanent-migrants, a finding explained by degrees of disruption of unions. Higher fertility was associated with less education, lower economic participation, higher prevalence of marriage, longer residence and older ages. Regression analysis also showed that personal attributes outweighed contextual factors: thus age, marriage rates, residence time, education and economic activity were significant. Contextual factors were important only for non-migrants, except for destination variables which affected return-migrants and origin variables which affected circular-migrants. Low fertility was associated with urbanization, industrialization, mineral extraction, large farms, recent farm settlement and export crops. The results indicate cear influences of modernity and place influences on fertility of migrants.^ieng

[The advance and retreat of the agricultural frontier in Brazil: an attempt at a structural and spatial interpretation]. / Fluxo e refluxo da fronteira agricola no Brasil: ensaio de interpretacao estrutural e espacial

PIP: The relationship between economic activities and population movement in the Brazilian Amazon frontier is explored. A historical review of the frontier's changing conditions over time is presented. Consideration is given to the original role of the frontier as a destination for surplus population from urban-centered industrial development. The growing influence of the capitalist economy on the frontier since the 1960s, particularly on the region's agricultural development, is also examined. (summary in ENG)^ieng

[The rural-urban nature and geographical nature of patterns of internal migration]. / Naturaleza rural-urbana y patrones geograficos de la migracion interna

PIP: The rural-urban nature and geographical patterns of internal migration in Chile are studied. The magnitude, nature, and relative importance of rural-urban, interurban, inter-rural, and urban-rural movements in the country are examined, with a focus on the impact of internal migration on urbanization and on the demographic growth of cities and rural areas. Rural and urban differentials in propensity to migrate and in the capacity to attract and retain population are investigated using 1970 census data on migratory flows to and from the Santiago metropolitan area and those directed to other parts of the country.^ieng