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In: United Nations. Economic and Social Commission for Asia and the Pacific, World Fertility Survey, and International Institute for Population Studies. Regional Workshop on Techniques of Analysis of World Fertility Survey data: report and selected papers. New York, UN, 1979. 15-36. (Asian Population Studies Series No. 44)The World Fertility Survey provides data from national maternity history inquiries. Detecting trends and differentials is only as accurate as the data collected. Where evidence suggests error, the analysis may be restricted to obtaining only a measure of fertility level. The basic data is the date and order of birth of each live born child for a sample of women in the reproductive period, according to the current age of the women and their duration of marriage. The cohort marker is usually separated into 7 5-year classes determined by age at interview; sample of women is representative of the female population of childbearing age. Total births for each cohort are allocated to different periods preceding the survey date. Reading down the columns gives the births to different cohorts over different ranges in the same time interval preceding the survey. To detect omissions, check the overall sex ratio and the sex ratios by periods; examine the trends of infant mortality by cohorts and periods; an excess of male mortality over female indicates poor reporting of dead female children and/or of sex (a common omission). From data on age of mother and number of surviving children at the survey and estimates of mortality level, the numbers of births at preceding periods may be calculated.
New York, UN, 1979. 279 p. (Population studies No. 62)This report was prepared by the Population Division of the Department of Economic and Social Affairs of the United Nations Secretariat on the basis of inputs by the Division, the International Labour Organisation, the Food and Agriculture Organization of the UN, the UN Educational, Scientific and Cultural Organization, and the World Health Organization. Tables are presented for sex compositions of populations; demographic variables; percentage rates of change of unstandardized maternal mortality rates and ratios; population enumerated in the United States and born in Latin America; urban and rural population, annual rates of growth, and percentage of urban in total population, the world, the more developed and the less developed regions, 1950-75; crude death rates, by rural and urban residence, selected more developed countries; childhood mortality rates, age 1-4 years; and many others. The world population amounted to nearly 4 billion in 1975, a 60% increase over the 1950 population of 2.5 billion. The global increase is about 2%. The average death rate in developing areas has dropped from 25/1000 in 1950 to about 15/1000, a 40% decline. Estimates of birth rates in developing countries are 40-45 for 1950 and 35-40/1000 for 1975. Most of the shifts in vital trends in the less developed regions are still at an early stage or of limited geographical scope.