@article{Lutz2021,
author = {Lutz, W. and Reiter, C. and Özdemir, C. and Yildiz, D. and Guimaraes, R. and Goujon, A.},
title= {Skills-adjusted human capital shows rising global gap},
year = {2021},
doi = {10.1073/pnas.2015826118},
volume = {118},
number = {7},
pages = {2015826118},
}