Martine Corijn, Aart C. Liefbroer, Jenny de Jong Gierveld, It Takes Two to Tango, Doesn't It? The Influence of Couple Characteristics on the Timing of the Birth of the First Child, Journal of Marriage and Family, Vol. 58, No. 1 (Feb., 1996), pp. 117-126
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Corijn et al. (1996) studied this question.
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