https://www.scirp.org/reference/ReferencesPapers?ReferenceID=1748575
Mamuneas, T.P., Savvides, A. and Stengos, T. (2006) Economic Development and the Return to Human...
Mamuneas, T.P., Savvides, A. and Stengos, T. (2006) Economic Development and the Return to Human Capital A Smooth Coefficient Semiparametric Approach. Journal...