Gullason, E.T. 1998. A Test Of The Validity Of The Screening Hypothesis Versus The Human Capital Theory Using The Wu-Hausman Specification Test For Endogeneity. Journal of Applied Business Research (JABR). 14, 3 (Jul. 1998), 13–20. DOI:https://doi.org/10.19030/jabr.v14i3.5699.