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Margins, concentration, and the performance of firms in international trade: Evidence from Japanese customs data

Author

Listed:
  • Ito, Keiko
  • Endoh, Masahiro
  • Jinji, Naoto
  • Matsuura, Toshiyuki
  • Okubo, Toshihiro
  • Sasahara, Akira

Abstract

This study is the first to comprehensively investigate international trade at the firm-level using Japan’s customs data for the 2014–2020 period. We first decompose international trade into the intensive and extensive margins and show that the intensive margin accounts for around 30% and 40% of the variation in partner country-specific exports and imports, respectively. We next find a substantial concentration of trading firms: in 2017, the top 10% of exporters accounted for 96.6% of all exports, while the top 10% of importers were responsible for 94.6% of all imports. Finally, we match the customs data with other firm-level datasets and estimate the performance premia of exporting firms. Our findings indicate that exporting manufacturing firms outperform non-exporting manufacturing firms in all aspects we consider: sales, value added, the number of employees, the capital-labor ratio, productivity, and wages. Interestingly, the exporter premia of manufacturing firms for value added, labor productivity, and total factor productivity decreased between 2014 and 2016 and then increased until 2019, whereas the exporter premium for the average wage steadily increased.

Suggested Citation

  • Ito, Keiko & Endoh, Masahiro & Jinji, Naoto & Matsuura, Toshiyuki & Okubo, Toshihiro & Sasahara, Akira, 2025. "Margins, concentration, and the performance of firms in international trade: Evidence from Japanese customs data," Journal of the Japanese and International Economies, Elsevier, vol. 75(C).
    • Handle: RePEc:eee:jjieco:v:75:y:2025:i:c:s0889158324000364
    DOI: 10.1016/j.jjie.2024.101340
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    More about this item

    Keywords

    Japan’s international trade; Customs data; Intensive and extensive margins of trade; Exporter premia;
    All these keywords.

    JEL classification:

    • F14 - International Economics - - Trade - - - Empirical Studies of Trade
    • L25 - Industrial Organization - - Firm Objectives, Organization, and Behavior - - - Firm Performance

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