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Abstract:
Abstract The study of nuptiality has taken on urgency, for demographers as well as for sociologists, with the increased world concern over sustained high fertility and the evident contribution of early marriage to that high fertility. Moreover, along with despair over the efficacy of conventional family planning programmes has come an expectation that more basic institutional changes, such as changes in marriage patterns, will be necessary in order finally to achieve a tolerably low world population growth rate. Yet our understanding of the determinants of such primary nuptiality dimensions as age at first marriage is very imperfect and unlikely to give much guidance in policy formation.
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Two couples are considered to be equivalent if they produce the same rotational effect on a rigid body. In other words, the two couples have the same magnitude and act in the same direction, causing the same angular displacement or acceleration in the body.
For instance, consider two couples lying in the plane of the page, with one having a pair of equal...
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