Key Social Norms Take-aways This study finds that early marriage contributes to the transmission and reinforcement of traditional gender norms in Bangladesh, shaping women’s beliefs and weakening their social networks. Women who marry earlier are more likely to agree with gender-biased statements and report fewer progressive role models in their networks. Crucially, the study tested multiple potential pathways through which early marriage might affect norms—such as reduced education, poorer social networks, and more conservative marital households—and found that none alone explained the effect. The impact of early marriage on attitudes persisted even among women with no schooling, those with high-quality preexisting social networks, and those whose mothers had some education or NGO involvement. This suggests that it is the experience of early marriage itself—particularly early entry into domestic roles and responsibilities—that directly shapes and reinforces traditional norms. The findings highlight the importance of targeting the timing of marriage as a key lever for norm change and not relying solely on education or economic interventions to shift attitudes.

Objectives The study aimed to identify whether early marriage serves as a mechanism for transmitting traditional gender norms. Specifically, it explored whether the timing of marriage affects women’s beliefs about gender roles and the composition of their social networks, beyond the influence of parental background.

Methods Using nationally representative data from Bangladesh, the study analyzed two datasets: the 2014 Women’s Life Choices and Attitudes Survey and the 2005 Bangladesh Adolescent Survey. Researchers used an instrumental variable approach, exploiting variation in age at menarche between sisters to estimate the causal impact of marriage age on gender attitudes and social networks, while controlling for unobserved family-level traits.

Results Early marriage significantly increased agreement with traditional gender role statements and reduced the number of progressive female role models in women’s social networks. These effects were not explained by differences in education, marital household characteristics, or preexisting social networks. In adolescents, age at menarche had no direct effect on attitudes, validating its use as an instrument.

Conclusions Early marriage plays a direct role in shaping gender norms and social expectations in adulthood. Addressing it is critical for efforts to shift norms and empower women, particularly in settings where marriage transitions are early and deeply embedded in social expectations.