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On Pitchforks and Tomahawks


  • Pflüger, Michael P.

    () (University of Würzburg)

  • Suedekum, Jens

    () (Heinrich Heine University Düsseldorf)


The core-periphery model by Krugman (1991) has two 'dramatic' implications: catastrophic agglomeration and locational hysteresis. We study this seminal model with CES instead of Cobb-Douglas upper tier preferences. This small generalization suffices to change these stark implications. For a wide range of parameters we find that the model exhibits instead a smooth and easily reversible transition from symmetry to agglomeration.

Suggested Citation

  • Pflüger, Michael P. & Suedekum, Jens, 2007. "On Pitchforks and Tomahawks," IZA Discussion Papers 3258, Institute for the Study of Labor (IZA).
  • Handle: RePEc:iza:izadps:dp3258

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    References listed on IDEAS

    1. Head, Keith & Mayer, Thierry, 2004. "The empirics of agglomeration and trade," Handbook of Regional and Urban Economics,in: J. V. Henderson & J. F. Thisse (ed.), Handbook of Regional and Urban Economics, edition 1, volume 4, chapter 59, pages 2609-2669 Elsevier.
    2. Ottaviano, Gianmarco & Thisse, Jacques-Francois, 2004. "Agglomeration and economic geography," Handbook of Regional and Urban Economics,in: J. V. Henderson & J. F. Thisse (ed.), Handbook of Regional and Urban Economics, edition 1, volume 4, chapter 58, pages 2563-2608 Elsevier.
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    Cited by:

    1. Christian Ghiglino & Antonella Nocco, 2017. "When Veblen meets Krugman: social network and city dynamics," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 63(2), pages 431-470, February.

    More about this item


    bifurcation pattern; agglomeration; new economic geography; core-periphery model;

    JEL classification:

    • F12 - International Economics - - Trade - - - Models of Trade with Imperfect Competition and Scale Economies; Fragmentation
    • F15 - International Economics - - Trade - - - Economic Integration
    • F22 - International Economics - - International Factor Movements and International Business - - - International Migration
    • R12 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General Regional Economics - - - Size and Spatial Distributions of Regional Economic Activity; Interregional Trade (economic geography)
    • R50 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - Regional Government Analysis - - - General

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