Put some keywords into Google Scholar and you will find heaps of research on this topic. Here’s the first one I found. https://link.springer.com/article/10.1057

Put some keywords into Google Scholar and you will find heaps of research on this topic. Here’s the first one I found. https://link.springer.com/article/10.1057/eej.2014.22 https://link.springer.com/article/10.1057/eej.2014.22 > We estimate several models with an extensive list of control variables and high school fixed effects. Results consistently show that high school GPA is a positive and statistically significant predictor of educational attainment and earnings in adulthood. Moreover, the coefficient estimates are large and economically important for each gender.