Causal Impact of School Starting Age on the Tempo of Childbirths: Evidence from Working Mothers and School Entry Cutoff Using Exact Date of Birth.

SCHOOL children; CHILDBIRTH; WORKING mothers; SOCIOECONOMIC status; EMPLOYMENT

Many studies show that females' age at first childbirth affects important outcomes of these females and their offspring such as health- and socioeconomic-related variables. This paper analyzes whether there is a causal relationship between working mothers' school entry age and the timing at which they give birth by exploiting Korea's elementary school entry cutoff regulation. Using administrative employment insurance data that record the fertility history of female working mothers together with regression discontinuity design, we find that a year's delay in age at school starting increases age at first and second childbirth by approximately 3 and 4 months, respectively. We also find that one of the mechanisms that affects the relationship between these two variables is age at first employment. The estimated effects of SSA are likely to be salient in a country where educational sequence that a student experience is rigid. [ABSTRACT FROM AUTHOR]

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