ยงWookun Kim is an assistant professor at the economics department, Southern Methodist University in Dallas, Texas, USA and a research affiliate at CESifo, Munich, Germany. This paper uses confidential data from Statistics Korea, a government agency under the Ministry of Economy and Finance of South Korea. The data access can be obtained by filing a request directly with the agency via its MicroData Integrated Service (mdis.kostat.go.kr/eng/index.do). The author is willing to assist. The other data and all the codes used in this article are available online: . This project was supported in part by the California Center for Population Research with a grant (T32HD007545; P2CHD041055) from the Eunice Kennedy Shriver National Institute of Child Health and Human Development. The content is solely my responsibility and does not represent the official views of the NICHD or the National Institutes of Health. All errors are mine. An online appendix has been included.
