@data{learning-a/2004,
author = {Koop, Gary and Tobias, Justin L.},
publisher = {ZBW - Leibniz Informationszentrum Wirtschaft},
title = {learning-about-heterogeneity-in-returns-to-schooling},
year = {2004},
version = {1},
url = {https://jda-test.zbw.eu/dataset/learning-about-heterogeneity-in-returns-to-schooling} 
}