This paper explores a newly-available panel data set merging balance sheet and international tradetransaction data for Belgium. Both imports and exports appear to be highly concentrated among fewfirms and seem to have become more so over time. Focusing on manufacturing, we find that factspreviously reported in the literature for exports only actually apply to imports too. We note that thenumber of trading firms diminishes as the number of export destinations or import origins increases.The same is true if we consider the number of products traded. With regard to productivitydifferentials, firms that both import and export appear to be the most productive, followed, indescending order, by importers only, exporters only and non-traders. These results point to thepresence of fixed costs; not only of exporting, but also of importing and to a process of self-selectionin both export and import markets. Also, the productivity advantage of exporters reported in theliterature may be overstated because imports were not considered.
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Paper provided by Centre for Economic Performance, LSE in its series CEP Discussion Papers with number
dp0801.
Find related papers by JEL classification: F10 - International Economics - - Trade - - - General F16 - International Economics - - Trade - - - Trade and Labor Market Interactions J21 - Labor and Demographic Economics - - Demand and Supply of Labor - - - Labor Force and Employment, Size, and Structure
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