Dispersão de produtividades e salários

E volto uma vez mais a este figura neste postal "O presente envenenado"

A propósito deste relatório "The firm-level link between productivity dispersion and wage inequality: A symptom of low job mobility?".

Algo relacionado com outro velho tema deste blogue, a loucura do Senhor dos Perdões, (a crença de que um sector de actividade é homogéneo, quando existe mais variabilidade dentro de um sector do que entre sectores económicos).

Alguns sublinhados do relatório:

"Differences in average wages across firms which account for around one-half of overall wage inequality are mainly explained by differences in firm wage premia (the part of wages that depends exclusively on characteristics of firms) rather than workforce composition. Using a new cross-country dataset of linked employer-employee data, this paper investigates the role of cross-firm dispersion in productivity in explaining dispersion in firm wage premia, as well as the factors shaping the link between productivity wages at the firm level. The results suggest that around 15% of cross-firm differences in productivity are passed on to differences in firm wage premia. The degree of pass-through is systematically larger in countries and industries with more limited job mobility, where low-productivity firms can afford to pay lower wage premia relative to high-productivity ones without a substantial fraction of workers quitting their jobs. Stronger product market competition raises pass-through while more centralised bargaining and higher minimum wages constrain firm-level wage setting at any given level of productivity dispersion. From a policy perspective, the results suggest that the key priority should be to promote job mobility, which would reduce wage differences between firms while easing the efficient reallocation of workers across them."

"In many OECD countries, there are large and increasing productivity differences between firms, even within narrowly defined industries. At the same time, in these countries, differences in average wages between firms have also increased, explaining more than half of the overall increases in wage inequality. To some extent, such increases in between-firm wage differences reflect the sorting of workers with higher education and more experience into firms paying higher wages. But differences in wages between firms are large even for workers with similar characteristics, suggesting the existence of firm wage premia.

2.2. Wage premia dispersion between firms mainly reflects within-industry differences

Wage premia differentials between industries are small relative to differentials between firms within the same industry. On average across countries, around 75% of dispersion in firm wage premia IS explained by wage differences between firms within the same industry (Figure 3)."