The Population Commission and IUSSP.
The United Nations (UN) and the International Union for the Scientific Study of Population (IUSSP) have cooperated since the 1940s. In 1927 an International Population Conference in Geveva established a permanent Population Union to cooperate with the population activities of the League of Nations. The 2 institutions' successors, IUSSP and the United Nations (UN), developed close and productive linkages, collaborating to create a Multilingual Demographic Dictionary, published in English, French, Russian, and Spanish and in many other languages. Meanwhile the Union, at the request of UNESCO, prepared a pioneering study attempting to define the cultural factors affecting developing country fertility in the context of the demographic transition, In 1966 the Union and the UN collaborated to develop criteria for internationally comparable studies in fertility and family planning (FP). The resulting monograph served as a reference for many fertility studies, including the World Fertility Survey. Another study on the impact of FP programs on fertility, resulted in the organization of expert meetings and the production of a manual and monographs on FP program evaluation. There was futher cooperation in a study on mortality, internal migration and international migration, resulting in manuals on methods of analysing internal migration and indirect measures of emigration, among other things. The 1954 Wold Population Conference (WPC) and the 1965 UN WPC were organized by the UN collaborating with the Union, and the Union administered the funds used to bring developing country delegates to the Conference. Subsequent WPCs at Bucharest and Mexico City were political in nature, bu the Union contributed to both a report outlining demographic research needs. The Union also assisted the UN in organizing a series of regional population conferences, and its Committee on Demographic Instruction prepared a report for UNESCO on teaching demography, and cooperated with the Secretariat in funding the UN Regional Demographic Training Centers at Bombay and Santiago.