Pfeiffer, Friedhelm; Stichnoth, Holger - 2020
internal rate of return (IRR) of 14.2% for gross earnings, 7.4% for disposable income, and 6.6% for the net fiscal contribution … found to have negative IRRs: -0.5% for gross earnings and -5.9% for both disposable income and the net fiscal contribution … per student, and the level of income tax payments. …