Wu Lawrence L
Department of Sociology, New York University, Puck Building, 295 Lafayette Street, 4th Floor, New York, NY 10012-9605, USA.
Demography. 2009 Feb;46(1):209-10; discussion 211-9. doi: 10.1353/dem.0.0044.
Ermisch (2009) criticized Gray, Stockard, and Stone (2006), arguing that they incorrectly tested a model positing a nonlinear relationship between the nonmarital fertility ratio and the proportion of unmarried women. I identify a different problem, which is that even if this model were to hold for a particular population, it would not in general hold for subgroups of this population; likewise, were it to hold for subgroups, it would not hold for aggregations of these subgroups.
埃尔米施(2009年)批评了格雷、斯托卡德和斯通(2006年),认为他们对一个假定非婚生育率与未婚女性比例之间存在非线性关系的模型进行了错误的检验。我发现了一个不同的问题,即即使这个模型对特定人群成立,一般来说对该人群的子群体也不成立;同样地,即使它对子群体成立,对这些子群体的总和也不成立。