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Regions are not countries: a new approach to the border effect

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  • Comerford, David
  • Rodríguez Mora, José Vicente

Abstract

We use a version of the Melitz (2003) model to calibrate the magnitude and impact of the border effect, the well-known empirical regularity that trade is much lower across a national border than would otherwise be expected. We calibrate total bilateral trade frictions as a parameter and show that frictions between nation states are systematically higher than those between sub-national states or regions. Using plausible counterfactual analysis, we assess the costs of independence for Scotland, Catalonia, & the Basque Country: the intellectual experiment that is performed is to suppose that the region on independence takes on the calibrated frictions of a counterfactual independent country. If the main change that comes with the independence of regions of larger countries is that their border with their former union partner comes to resemble a normal country border, then the trade costs of the break-up of countries into smaller states (even within the EU) are significant. The border effects associated with membership of the European Union or otherwise, are much lower than the border effect differences between countries and regions. As an illustration of this we produce a potential quantification of the trade costs of a British exit from the EU. Conversely, the potential gains from the European Union achieving the sort of integration seen within a nation state, a United States of Europe, are very large.

Suggested Citation

  • Comerford, David & Rodríguez Mora, José Vicente, 2014. "Regions are not countries: a new approach to the border effect," CEPR Discussion Papers 9967, C.E.P.R. Discussion Papers.
  • Handle: RePEc:cpr:ceprdp:9967
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    References listed on IDEAS

    as
    1. Francesco Caselli & Miklós Koren & Milan Lisicky & Silvana Tenreyro, 2020. "Diversification Through Trade," The Quarterly Journal of Economics, Oxford University Press, vol. 135(1), pages 449-502.
    2. Costas Arkolakis & Arnaud Costinot & Andres Rodriguez-Clare, 2012. "New Trade Models, Same Old Gains?," American Economic Review, American Economic Association, vol. 102(1), pages 94-130, February.
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    Cited by:

    1. David Comerford & José V Rodríguez Mora & Beata Javorcik, 2019. "The gains from economic integration," Economic Policy, CEPR;CES;MSH, vol. 34(98), pages 201-266.

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    More about this item

    Keywords

    Border effect; independence; trade;
    All these keywords.

    JEL classification:

    • F15 - International Economics - - Trade - - - Economic Integration
    • R13 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General Regional Economics - - - General Equilibrium and Welfare Economic Analysis of Regional Economies

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