https://phys.org/news/2018-11-factor-women-africa.html

In Africa and elsewhere, educated women tend to marry later in life than their less-educated peers. The current research looked at the prevalence of education among more than 721,000 women in 246 birth cohorts that spanned four decades.

Frye and colleague Sara Lopus, assistant professor of sociology at California Polytechnic State University, used data from 30 countries across sub-Saharan Africa to measure the impact of educational context on the relationship between a woman's educational attainment and her marital timing. Marriages included traditional, civil unions, religious and de facto.