作者：Galbraith, VL; Thomas, DS
摘要：With the onset of World War II, the experience of the 2 decades separating it from the first makes possible the only analysis for some time to come of the normal impact of business cycles upon birth rates. Data more suitable than any formerly used were provided by computing maternal frequencies for each order of birth separately within each quinquennial age group of women in the reproductive period. These frequencies were summed for all age groups so as to give a total for each order of birth ...
作者：Deming, WE; Stephan, FF
摘要：By historical precedence, and by law, one of the primary functions of the census is to provide a count or inventory of the population as it actually existed on a specified census date. For such purposes the census must be complete. As a basis for scientific generalizations and decisions for action, a census is only a sample. It gives data of the past, and inferences are drawn on the future. A well drawn sample will give the greatest amt. of information for the money expended. The size and type...
作者：Zimmerman, CC
作者单位：Harvard University; Harvard University
