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 …

sell their products on the home market only. This so-called exporter productivity premium qualifies as a stylized fact … extreme values drive the result. The large exporter productivity premium found for samples of firms including outliers are … estimated exporter productivity premium is statistically significant and relevant from an economic point of view when a standard …