Lee C F, Khan M M
Demography. 1978 Aug;15(3):337-44.
Reproductive intentions of white mothers with no more than three children in 1965 and in 1970 were analyzed for their stability and change with respect to such factors as parity, age of the youngest child, wife's employment, and husband's education. Parity and age of the youngest child were found to have a much more important effect on the intent to have additional children than were such socioeconomic variables as wife's employment and husband's education. Parity and the interval since the latest birth (or the age of the youngest child) were found to have a nonlinear effect and to interact in affecting the reproductive intention. This suggests a convergence to a two-child family as the threshold size and that the lenght of childspacing is contingent on the parity. Change during 1965--1970 in this direction was found to be greater among mothers with husbands having college or higher educations.
对1965年和1970年子女不超过三个的白人母亲的生育意愿进行了分析，研究其在胎次、最小孩子年龄、妻子就业情况和丈夫受教育程度等因素方面的稳定性和变化。结果发现，与妻子就业和丈夫受教育程度等社会经济变量相比，胎次和最小孩子年龄对生育更多子女意愿的影响要重要得多。胎次和最近一次生育后的间隔时间（或最小孩子的年龄）被发现具有非线性影响，并且在影响生育意愿方面存在相互作用。这表明，作为门槛规模，家庭向两个孩子的模式趋同，而且生育间隔的长度取决于胎次。1965年至1970年期间，在丈夫受过大学或更高教育的母亲中，朝这个方向的变化更大。
