The four papers in this volume discuss various facets of the poverty-demography interaction: the rationale for the desired family size of the poor, the problems of attaining such size, the effect of family size/structure on household economy, and the future well-being of the children of the poor. "Mass Poverty, Demography, and Development Strategy: A Selective Survey" (B. Abegaz) is a selective survey of the major economic and demographic characteristics of mass poverty. "Poverty and Household Responses in Rural Bangladesh (Q. M. Khan) explores the linkages between rural poverty and demographic behavior, using 1976-77 data from the Rural Poverty Survey of Bangladesh. "Child Fostering and High Fertility Interrelationships in West Africa" (U. C. Isiugo-Abanihe) examines the interrelationships between socio-cultural and demographic events that arise from the prevalent practice of child fostering, with an emphasis on the practice in Ghana and Nigeria. "Underdevelopment, Urban Growth, and Collective Social Action in Sao Paulo (Brazil)" (C. H. Wood and S. D. McCracken) raises a host of philosophical and substantive issues concerning the nature of the urban labor market in Sao Paulo, Brazil. (BZ)