Center for Demography and Ecology, Department of Sociology, University of Wisconsin-Madison, 1180 Observatory Drive, Madison, WI 53706, USA.
Popul Stud (Camb). 2011 Mar;65(1):115-28. doi: 10.1080/00324728.2010.543693.
Several studies have demonstrated that stepfamily couples have a higher risk of childbearing than couples in a stable union with the same total number of children. Analysing retrospective data from a nationally representative sample of Swedish adults, we find that the risk of a second or third birth is higher when it is the first or second child in a new union. We also find a faster pace of childbearing after stepfamily formation than after a shared birth. The risk of a second birth (in total) is only a little higher in the first two years after stepfamily formation than in the first two years after a shared birth, and thereafter the risk is lower for stepfamilies. The risk of a third birth (in total) is particularly high early in the stepfamily union and remains higher than that of couples with two shared children for at least five years. The stepfamily difference was lower after than before 1980, when the Swedish government introduced parental leave incentives for short birth intervals.
多项研究表明，继亲家庭的生育风险高于具有相同子女总数的稳定婚姻家庭。本研究利用瑞典全国代表性成人样本的回溯数据发现，在新家庭中，生育第一个或第二个孩子时，生育第二个或第三个孩子的风险更高。我们还发现继亲家庭形成后生育速度比共享生育后更快。继亲家庭在形成后两年内（总共）生育第二个孩子的风险仅比共享生育后两年内高一点，此后风险则低于共享生育家庭。继亲家庭生育第三个孩子（总共）的风险在继亲关系早期特别高，并且至少在五年内仍高于有两个共享孩子的夫妇。继亲家庭的差异在 1980 年之后比之前有所降低，当时瑞典政府为缩短生育间隔引入了育儿假激励措施。
