One flow-on effect of the 19th Amendment's granting women the right to vote in national elections was an increase in the number of children staying in school, a new study has found.

The three economists who did the study analyzed the school enrollment and school spending figures in 1920 (the year that the 19th Amendment became law) for 500 cities of at least 10,000 population, with a focus on comparing teens of 15 or older with children who were just about to start school.

After 1920, on average, the economists found, local education spending and school enrollment improved, especially in cities with large number of African-Americans. Those students, in particular, stayed in school an average of a full year longer as a result of women's suffrage, a result similar to that seen after the Supreme Court ordered school desegregation.

White students in the South also experienced a 34-percent rise in post-schooling income, the study found.

The study continued only as far as the graduation of that generation of students who were starting school in 1920 and included mitigations for factors such as laws that required students to attend school.

Economists Na'ama Shenhav of Dartmouth College, Esra Kose of Bucknell University, and Elira Kuka of Southern Methodist University conducted the study, published by the National Bureau of Economic Research.