Labor-Market Specialization within Same-Sex and Different-Sex Couples

We use data from the 2000 decennial Census to compare differences in earnings, hours worked, and labor-force participation between members of different household types, including same-sex couples, different-sex couples, and roommates. Both same-sex and different-sex couples exhibit some degree of household specialization, whereas roommates show little or no degree of specialization. Of all household types, married couples exhibit by far the highest degree of specialization with respect to labor-market outcomes. With respect to differences in earnings and hours, gay male couples are more similar to married couples than lesbian or unmarried heterosexual couples are to married couples.