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The Industrial Classification of the Population

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II. The Industrial Classification of the Population This PDF is a selection from an out-of-print volume from the National Bureau of Economic Research Volume Title: The National Income and Its Purchasing Power Volume Author/Editor: Willford Isbell King, assisted by Lillian Epstein Volume Publisher: NBER Volume ISBN: 0-87014-014-0 Volume URL: Publication Date: 1930 Chapter Title: II. The Industrial Classification of the Population Chapter Author: Willford Isbell King Chapter URL: Chapter pages in book: (p. 44 - 64) CHAPTER II THE INDUSTRIAL CLASSIFICATION OF THE POPULATION Method of Estimating Population of United States. Estimates of national income cannot be made without knowing the total and the working population of the country. Since the census of population is taken oniy once in a decade, it is necessary to estimate the population for each inter-censal year. The method employed in interpolating population estimates has been to build up from the last census by calculating for each year the number of births and deaths and the net immigration. Evidently, if births and net immigration are added together and the number of deaths subtracted, the remainder represents the population increase during the given period. None of these three quantities can, however, be calculated with precision. Reliability of Information Underlying Population Estimates. During recent years, the Census registration area for deaths has come to cover the major portion of the population of the United States. The probabilities are that the great majority of deaths ac- tually occurring within that area are reported to the proper regis- tration official, and that, therefore, the statistics for the registration area are reasonably accurate. Since the registration area. covers the majority of the inhabitants, it constitutes a sample which can now be safely used to represent the population as a whole. One cannot fe

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