This study is specifically about extending compulsory schooling to age 14, 15, and 16. People are literate and can work with numbers by 13. If the benefit of h

This study is specifically about extending compulsory schooling to age 14, 15, and 16. People are literate and can work with numbers by 13. If the benefit of high school is "raising the baseline just a little", we should ask ourselves whether "just a little" benefit justifies the cost. Education is not free, so it needs to move the needle. One way to measure the benefit is to look at outcomes of interest after long time has passed, so this study did that. There was no effect, casting doubt to earlier studies that found large effects. One strength of this study is that they work with complete data, unlike previous studies which mostly worked with sampled panels. This suggests sampling bias as a mechanism to explain previous studies.