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"This paper examines the adult-mortality transition in Costa Rica and its determinants. The risk of dying declined by 80% for young adults and by 40% for old adults from 1920 to 1990. The fastest decline took place in the 1950s for young-adult ages and in the late 1980s for old-adult ages.... By 1990, about 40% of Costa Rican deaths are caused by accidents and violence at young-adult ages and by cardiovascular diseases at old ages. Infectious and nutritional-related conditions (especially respiratory tuberculosis and malaria) account for three-fourths of the adult-mortality decline between 1951 and 1971, but only for 30% since that year on." (SUMMARY IN ENG), (excerpt)

"The paper examines the relationship between medium and short-term changes in aggregate economic activity, and national morbidity and mortality rates by certain causes. Although overall mortality conditions have continued to improve during the economic crisis of the nineteen-eighties in the three countries studied, mortality by some causes...[has] discontinued [its] decline and [has] even increased [its] rates in some recent years.... The short-term changes in mortality in Costa Rica and Chile are generally lower than in Guatemala, but tend to be more systematic in their inverse relationship with economic fluctuations in the former. Many of the causes studied affect young and older adults, which are groups that have so far received little attention in evaluations of the health effects of economic crises in the region." (SUMMARY IN ENG), (excerpt)

This paper describes and analyzes the main characteristics identified in seasonal Guatemalan workers who migrate every year to coffee plantations in the Sosonusco region in the state of Chiapas. Stress is placed on the disadvantageous working and living conditions of said population in their original areas of residence, as a necessary referent for understanding the nature and function of seasonal migratory work as a part of a social sector whose living conditions are marked by poverty. The data utilized for the analysis were obtained through a survey carried out in the 1986-1987 harvest season, in which 591 migrants working in 13 ejido or privately-owned productive units in the municipalities of Tapachula and Union Juarez were interviewed.

Changes in the relationship between population factors and the development process in Mexico from 1940 to the present are reviewed. The authors show how the development that occurred up to about 1970 both absorbed and encouraged rapid population growth. They then describe how the emergence of problems concerning this relationship led to the development of a population policy during the 1970s. "The paper then takes up the implementation of that policy and the determinants of the fertility decline that took place afterwards, and closes with a brief review of the implications that demographic considerations have for Mexico's future." (SUMMARY IN ENG), (excerpt)

"This paper describes the historical evolution of five populations and analyzes the circumstances under which data on maternal and paternal orphanhood of couples at the moment of marriage were collected and compiled." The data, which concern historical populations in Mexico, Chile, Peru, Brazil, and Argentina, are used to construct life tables for male and female adults. Consideration is given to mortality differentials by sex. (summary in ENG), (excerpt)