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Published online by Cambridge University Press: 18 August 2016
Since the formation of the Demographic Study Group by the Students' Society at the end of 1949, much attention has been devoted by a small but keenly interested body of members of the Institute to the analysis of fertility and reproductivity. One of the aims of their researches has been to arrive at an independent method of assessing the degree of sufficiency of the numbers of births in this country for the replacement of the population. The present paper, founded as it is upon the ideas expressed at the Group meetings, is in essence a joint production with members of the Group, and their share in it is gratefully acknowledged.