Robert Hummer and Erin Hamilton note that the prevalence of fragile families varies substantially by race and ethnicity. African Americans and Hispanics have the highest prevalence; Asian Americans, the lowest; and whites fall somewhere in the middle. The share of unmarried births is lower among most foreign-born mothers than among their U.S.-born ethnic counterparts. Immigrant-native differences are particularly large for Asians, whites, and blacks.

The authors also find racial and ethnic differences in the composition and stability of fragile families over time. Although most parents of all racial and ethnic groups are romantically involved at the time of their child's birth, African American women are less likely to be in a cohabiting relationship than are white and Hispanic mothers. Over time, these racial and ethnic differences become more pronounced, with African American mothers having the lowest rates of marriage and cohabitation and the highest breakup rates, and Mexican immigrant mothers having the highest rates of marriage and cohabitation and the lowest breakup rates.

Fragile families have far fewer socioeconomic resources than married families, though resources vary within fragile families by race and ethnicity. White mothers, in general, have more socioeconomic resources than black, Mexican American, and Mexican immigrant mothers; they are more likely to have incomes above the poverty limit, more likely to own a car, less likely to have children from a prior relationship, and more likely to report living in a safe neighborhood. Access to health care and child care follows a similar pattern. The exception is education; black and white unmarried mothers are equally likely to have finished high school, and Mexican immigrant and Mexican American mothers are less likely to have done so.

The authors argue that socioeconomic differences are by far the biggest driver of racial and ethnic differences in marriage and family stability, and they support reforms to strengthen parents' economic security. They also discuss how sex ratios and culture affect family formation and stability. In particular, they note that despite severe poverty, Mexican immigrant families have high rates of marriage and cohabitation—an advantage that erodes by the second generation with assimilation. To address the paradox that marriage declines as socioeconomic status improves, they support policies that reinforce rather than undermine the family ties of Mexican immigrants.


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pp. 113-131
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