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Foundation of the small open economy model with product differentiation

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  • Caliendo, Lorenzo
  • Feenstra, Robert C.

Abstract

We derive a small open economy (SOE) as the limit of an economy as the number or size of its trading partners goes to infinity and trade costs also go to infinity. We obtain this limit in the Armington, Eaton–Kortum, Krugman, and Melitz models. In all cases, the trade of the SOE with the foreign countries approaches a finite limit, and the domestic expenditure share for the SOE approaches a limit that is not zero or unity. The foreign countries can be either infinitely many SOEs, or alternatively, one or many large countries with domestic expenditure shares that approach unity. We illustrate the usefulness of this framework by obtaining a formula for the optimal tariff in the SOE – depending on the elasticity of domestic wages with respect to the tariff – that is consistent with all models.

Suggested Citation

  • Caliendo, Lorenzo & Feenstra, Robert C., 2024. "Foundation of the small open economy model with product differentiation," Journal of International Economics, Elsevier, vol. 150(C).
    • Handle: RePEc:eee:inecon:v:150:y:2024:i:c:s002219962300106x
    DOI: 10.1016/j.jinteco.2023.103820
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    Cited by:

    1. M.R. Malefane, 2023. "Economic implications of external monetary policy shocks for Lesotho: An empirical investigation," Journal of Economic Policy and Management Issues, JEPMI, vol. 2(2), pages 65-75.
    2. Caliendo, Lorenzo & Feenstra, Robert C. & Romalis, John & Taylor, Alan M., 2023. "A second-best argument for low optimal tariffs on intermediate inputs," Journal of International Economics, Elsevier, vol. 145(C).
    3. Kim, Jihee & Kim, Kyoochul & Park, Sangyoon & Sun, Chang, 2023. "The economic costs of trade sanctions: Evidence from North Korea," Journal of International Economics, Elsevier, vol. 145(C).

    More about this item

    Keywords

    Armington; Eaton–Kortum; Krugman; Melitz model; Monopolistic competition; Optimal tariff; Trade costs; Small open economy;
    All these keywords.

    JEL classification:

    • F12 - International Economics - - Trade - - - Models of Trade with Imperfect Competition and Scale Economies; Fragmentation
    • F13 - International Economics - - Trade - - - Trade Policy; International Trade Organizations

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