Sangsoo Lee and Hyunjoon Park have published, "Trends and educational variation in the association between spouses' marital histories in South Korea, 1993-2017," with Demographic Research. Sangsoo Lee is a Ph.D. candidate in the Department of Sociology at the University of Pennsylvania and the Kim Program Graduate Fellow. Hyunjoon Park is Korea Foundation Professor of Sociology at the University of Pennsylvania and Director of the James Joo-Jin Kim Program in Korean Studies.

https://www.demographic-research.org/volumes/vol45/27/default.htm