Exporting and Productivity in the United Kingdom

This paper investigates various aspects of the links betweenexporting and productivity for a large sample of firms in theUnited Kingdom. We find evidence to support the propositionthat sunk costs are important. Self selection takes place, withlarger and more productive firms entering export markets, andfirms have to become more productive in order to enter. Industrycharacteristics also affect the likelihood of entry—bothindustrial and spatial agglomeration are important. When werely on an unmatched sample of firms we can find some evidenceof further productivity improvement after entry, but this disappearswhen we use a matched sample. Our results suggest that policyshould avoid simply subsidizing firms that may self select intoexport promotion policies and focus instead on reducing informationasymmetries and supporting development of clusters.