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Erscheinungsjahr: 
2021
Schriftenreihe/Nr.: 
CESifo Working Paper No. 8986
Verlag: 
Center for Economic Studies and Ifo Institute (CESifo), Munich
Zusammenfassung: 
We use transaction-level data to study changes in the concentration of US imports. Concentration has fallen in the typical industry, while it is stable by industry and origin country. The fall in concentration is driven by the extensive margin: the number of exporting firms has grown, and the number of exported products has fallen relatively more for top firms. Instead, average revenue per product of top firms has increased. At the industry level, top firms are converging, but top firms within country are diverging. Finally, higher concentration from an origin country is associated with a fall in prices, foreign entry and industry growth. These facts suggest that intensified competition in international markets coexists with growing concentration among national producers.
Schlagwörter: 
superstar firms
concentration
US imports
firm heterogeneity
international trade
JEL: 
E23
F12
F14
L11
R12
Dokumentart: 
Working Paper
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