García-Pérez, J. Ignacio; Jiménez-Martín, Sergi; … - Barcelona Graduate School of Economics (Barcelona GSE) - 2010
Spain). Second,by considering the influence of unobserved heterogeneity in the estimation of the effectof our (carefully … incentives, however, is greatly affected by the existence of unobserved heterogeneity among workers. Its omission leads to …