Duke University Press

Table 1

Summary of data sets and analyses

Data Set	Period	Measure and Operationalization	Analyses
CPS	1968–2015 1968–1990 1990–2015	Pre-birth: Year before parenthood Post-birth: Years 0–10 after parenthood	Decomposition of trends in economic homogamy into changes before and after parenthood Contribution of women's employment to changes in economic homogamy before and after parenthood Contribution to income inequality of changes in economic homogamy before and after parenthood
Census	1960–1980	Assortative mating: Year of marriage Married, childless: Childless married	Decomposition of trends in pre-birth economic homogamy into changes at marriage and after marriage before parenthood
SIPP	1984–2014	Assortative mating: Year of marriage Married, childless: Childless married	Decomposition of trends in pre-birth economic homogamy into changes at marriage and after marriage before parenthood
Sensitivity Tests
CPS alternative measures	1968–2015 1968–1990 1990–2015	Pre-birth: Childless married Post-birth: Years 0–18 after parenthood	Decomposition of trends in economic homogamy into changes before and after parenthood

Data Set	Period	Measure and Operationalization	Analyses
CPS	1968–2015 1968–1990 1990–2015	Pre-birth: Year before parenthood Post-birth: Years 0–10 after parenthood	Decomposition of trends in economic homogamy into changes before and after parenthood Contribution of women's employment to changes in economic homogamy before and after parenthood Contribution to income inequality of changes in economic homogamy before and after parenthood
Census	1960–1980	Assortative mating: Year of marriage Married, childless: Childless married	Decomposition of trends in pre-birth economic homogamy into changes at marriage and after marriage before parenthood
SIPP	1984–2014	Assortative mating: Year of marriage Married, childless: Childless married	Decomposition of trends in pre-birth economic homogamy into changes at marriage and after marriage before parenthood
Sensitivity Tests
CPS alternative measures	1968–2015 1968–1990 1990–2015	Pre-birth: Childless married Post-birth: Years 0–18 after parenthood	Decomposition of trends in economic homogamy into changes before and after parenthood