Positive assortative matching implies that high productivity workers and firms match together. However, there is almost …. This could be the result of a bias caused by standard estimation error. Using German social security records we show that …

and productivity hold in the years before the export start, which indicates self-selection into exporting of more …

productive than firms that only sell on the national market. This positive exporter productivity premium shows up in a large … firm fixed effects. These studies test for a difference in productivity between exporters and non-exporters at the … conditional mean of the productivity distribution. However, if firms are heterogeneous, it is possible that the size of the …

estimates of the productivity premium of German firms exporting to the Euro-zone and beyond, controlling for unobserved time … observations, or outliers. The paper shows that estimates of the exporter productivity premium by destination are driven by a small … share of outliers. Using a "clean" sample without outliers the estimated productivity premium of firms that export to the …

estimation of the popular linear fixed effects panel data model, and to supply Stata code for it. In an application from the …

document the first empirical results on the relationship between imports and productivity for Germany, a leading actor on the … systematically by testing for self-selection of more productive firms into importing, and for productivity-enhancing effects of … imports ('learning-by-importing'). We find a positive link between importing and productivity. From an empirical model with …

the other hand, previous empirical studies show that exporting does not necessarily improve productivity. One possible … status and the growth of its labour productivity, using the firms' export status as a binary treatment variable and comparing …'s export-sales ratio and its labour productivity growth rate. We find that there is a causal effect of firms' export activities …