The Effects of Mexico's Child Marriage Ban on Adolescent Fertility, Domestic Violence, and Female Labor Income
Child marriage—defined as a formal or informal union before the age of 18—has been a widespread practice in Mexico, particularly in rural and Indigenous regions. Historically, Mexican law permitted girls to marry at 14 and boys at 16, provided they had parental or judicial consent. This legal framework raised major concerns regarding the rights, health, education, and economic prospects of girls and adolescents. In response, the country enacted a reform to the Federal Civil Code in 2014, setting the minimum legal age for marriage at 18 with no exceptions. This study evaluates the impact of the child marriage ban in Mexico on three key outcomes. First, it analyzes the incidence of births to adolescent mothers. Second, it evaluates the effect on gender-based violence, using hospital discharges due to domestic violence as an indicator. Finally, it considers women’s empowerment, measured by labor income as reported in household surveys. <div> <br> </div> <div> The empirical strategy relies on a difference-in-differences design, leveraging both the temporal variation in the reform's implementation and the historical heterogeneity in child marriage prevalence at the municipal level. The analysis compares cohorts of women exposed and not exposed to the reform within each municipality, controlling for fixed effects at the municipal, cohort and year levels. This methodology allows estimation of how the reform’s impact varies according to the pre-existing intensity of child marriage in each municipality. The findings indicate that the reform is associated with a greater reduction in adolescent births in municipalities with high prior prevalence of child marriage. In addition, there is evidence of increased labor income among women in those areas, as well as an increase in reported cases of domestic violence. This latter result may reflect greater detection, increased willingness to report, or improved institutional responsiveness following the reform. Overall, these results suggest that the public policy not only restricted access to child marriage, but also contributed to improving the well-being of young women. </div>