Di Paolo, Antonio; Raymond, Josep Lluís - 2011
(2006),” we want to quantify the expected earnings differential between individuals who are proficient in Catalan and those … who are not, taking into account the potential endogeneity between knowledge of Catalan and earnings. The results indicate … the existence of a positive return to knowledge of Catalan, with a 7.5% increase in earnings estimated by OLS; however …