International Union for the Scientific Study of Population (IUSSP)Demographers, economists, sociologists, physicians, public health officials, public administrators, statisticians, and other individuals in 127 countries engaged in the statistical study of populations, the effect of births, marriages, mortality, and health upon populations, and the relationship between these population phenomena and other economic, social, and biological phenomena. Stimulates interest in demography among governments, national and international organizations, scientific bodies, and the public.