highly skilled workers but does not depend on whether wages are collectively renegotiated at the firm level. …

-29 years), middle-aged (30-49 years) and older (more than 49 years) workers affect the productivity of firms and test for the … heterogeneity, endogeneity and state dependence) suggest that workers older than 49 are significantly less productive than prime age … and young workers. In contrast, the productivity of middle-age workers is not found to be significantly different compared …

standard distinction between white- and blue collar workers, and ii) the uncertainty of the firm economic environment, which …. Findings also show that the intensity of the relationship is stronger for highly skilled workers and in more stable … skilled workers and that in the presence of high uncertainty workers have less control over their effort-output relation and …

among workers with the same observed characteristics and working conditions, employed in different sectors. These … differentials appears to show a cyclical pattern over time. Further results indicate that ceteris paribus, workers earn …