Age and skill bias of trade liberalisation? : heterogeneous employment effects of EU Eastern Enlargement

This study analyses the 2004 Eastern Enlargement to the European Union to obtain evidence on the employment effects of an increase in trade liberalisation. The Enlargement is thought to generate a trade-induced demand shock with no (or only limited) supply effects. Besides the variation over time induced by the Enlargement, identification of the effects is based on a Melitz (2003) type productivity term to differentiate firms by the extent of exposure to the demand shock. The idea is that the effects of the demand shock should be driven by differences in firm-level productivity from the period before the new member countries actually entered the EU. German linked employer-employee data allow to observe the relation of initial establishment productivity with employment changes over a long panel from 1995 to 2009. The estimates show that the Enlargement had a negative effect on establishment-level employment growth, which is driven by increased worker separations and increased job destruction. Besides the overall employment effect, the study focuses on effect heterogeneity across age and skill groups of the workforce. These estimates point to a skill bias in the effect of the Enlargement that disadvantages low- and medium-skilled workers in terms of higher worker separation and job destruction. In addition, lowskilled workers suffer fewer accessions by firms, where against medium-skilled workers enjoy increased accessions and creation of new jobs. Besides this indication for a skill bias, there are no clear indications that point to an age bias in the employment effect of the Eastern Enlargement

Export decisions of services firms between agglomeration effects and market-entry costs

The paper tests the role of agglomeration effects on the export decision of services firms. Recent theories on trade with heterogeneous firms predict that export participation goes along with sunk market-entry costs. Only the more productive firms will be able to overcome these sunk costs. This leads to a process of - ex ante - self selection. These predictions are tested for the services industry, with due account for the possible role of agglomeration effects in large-city areas. Standard empirical tests of the new trade models consistently find productivity-based ex ante self selection by exporters, and this effect is mostly explained by unobserved sunk entry costs that exporters have to absorb in new foreign markets. Recent research by urban economists (e.g. Combes et al., 2012) suggests, however, that operating in large-city areas also goes along with positive productivity sorting. Ignoring this leads to upwardly biased estimates of the effect of foreign market entry costs. A large set of micro-data for establishments in Dutch services is used to investigate this hypothesis. I find evidence that positive productivity self-selection is based on the combined effects of agglomeration and anticipated market-entry cost for export starters. This effect is strongest in markets with more or less homogeneous products. I also find evidence that the productivity self-selection effect (of exporters compared to non-traders) is stronger in non-urban areas and smaller agglomerations