Abstract
This study focuses on uncovering marriage effect on wage income and within-household specialization in same-sex couples. The study shows that in general, married lesbians have about 10.0-11.4% marriage premium on wage income, and married gay men enjoy a premium of about 10.0-10.6%. Furthermore, this study finds that marriage leads to larger labor supply gaps in terms of employment status, annual working hours, annual working weeks, weekly working hours and annual wage income among same-sex couples, regardless of gender.