Jordahl, Henrik; Poutvaara, Panu; Tuomala, Juha - Institutet för Näringslivsforskning (IFN) - 2008
In a recent paper, García-Mainar and Montuenga-Gómez (2005) apply the generalized IV model of Hausman and Taylor to estimate education returns of wage earners and the self-employed in Portugal and in Spain. Our examination reveals several problems which relate to the validity and documentation...
