Social Stratification and the Formation of Single Parent Household in Japan
If we have concern with the intergenerational reproduction of poverty (or social stratification), we have to clarify the relationship between social attributes and the occurrence of the single parent households. We use the data of Longitudinal Survey of Newborns in the 21st Century (2001 Cohort) by Ministry of Health, Labour and Welfare of Japan. Respondent were randomly selected from men and women who nurture kids born either between at January 10th and 17th in 2001 or at between 10th and 17th in July 2001. Initial survey was done in 2002 and the sample size was 47,015. Afterwards, panel survey has been done for every year, except for 2007.
We set household composition at 9th survey (conducted in 2010) as basic dependent variable. As sample attrition was serious, we dealt with this sample selection bias by propensity score analysis and Heckman’s two stage estimation probit model (Heckit). We found that those who did not have college or university degree, those who had married at early ages, and those who had low household income in 2002 tended to drop out from subsequent survey, but they also tended to divorce and form a single parent household in 2010. Marital relationships of those at low socioeconomic status were generally insecure and were likely to disrupt.
These findings suggest the mediating effect of divorce between parents’ low educational attainment and those of their children’s.