Revisiting the causal effects of exporting on productivity: Does price heterogeneity matter?

In most empirical studies that establish the export-productivity relationships, output is measured in values rather than in quantities. This makes it difficult to distinguish between productivity and within-firm changes in price that could occur following exposure to international markets. Using detailed data on quantity and prices from Ethiopian manufacturing firms in the period 1996-2005, this paper distinguishes efficiency from revenue based productivity and examines what this means for the estimated relationship between exporting and productivity. The main results show that exporters are more productive than non-exporters in terms of revenue based productivity and this is explained by both self-selection and learning effects. However, when correcting for price heterogeneity, exporters appear to be similar to non-exporters both before and after export entry. Overall, the results suggest that the increase in firm-level productivity following entry into foreign markets is associated with changes in prices as opposed to productive efficiency

Protection for Sale with Imperfect Rent Capturing

We extend the protection for sale framework by modelling non tariff barriers. Explicitly introducing partial rent capturing leads to a testable specification that bridges the gap between the theoretical Grossman and Helpman (1994) model and its empirical implementation, where coverage ratios have been used to measure protection. Our econometric analysis supports the augmented specification and leads to more realistic estimates for the structural parameters of the model

Do wages reflect labor productivity? The case of Belgian regions

We simultaneously estimate a wage and a labor productivity equation where we include regional dummies as explanatory variables. We find that the wage-productivity gap reached 11% for Brussels and 4.2% for Wallonia in the years 2005 - 2012. This was driven by the negative performance in labor productivity of firms in these regions relative to Flanders, which more than compensated for the advantage in average salary cost they enjoyed. These results are coherent with the existence at the regional level of institutional barriers to the firm-level adjustment of wages to labor productivity