Eric A. Hanushek (hanushek{at}stanford.edu), Marc Piopiunik and Simon Wiederhold Eric A. Hanushek is a senior fellow at the Hoover Institution, Stanford University and is affiliated with CESifo and NBER. Marc Piopiunik is a postdoctoral researcher at the ifo Institute in Munich and affiliated with CESifo. Simon Wiederhold is Professor for Macroeconomics at KU Eichstätt-Ingolstadt and affiliated with the ifo Institute, CESifo, and ROA.
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Hanushek et al. (2018) studied this question.
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