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Selection Effects with Heterogeneous Firms

  • Monika Mrázová
  • J. Peter Neary

We provide a general characterization of which firms will select alternative ways of serving a market. If and only if firms' maximum profits are supermodular in production and marketaccess costs, more efficient firms will select into the activity with lower market-access costs. Our result applies in a range of models and under a variety of assumptions about market structure. We show that supermodularity holds in many cases but not in all. Exceptions include FDI (both horizontal and vertical) when demands are "sub-convex" (i.e., less convex than CES), fixed costs that vary with access mode, and R&D with threshold effects.

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Paper provided by Centre for Economic Performance, LSE in its series CEP Discussion Papers with number dp1174.

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Date of creation: Oct 2012
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Handle: RePEc:cep:cepdps:dp1174
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  12. Costas Arkolakis, 2010. "Market Penetration Costs and the New Consumers Margin in International Trade," Journal of Political Economy, University of Chicago Press, vol. 118(6), pages 1151 - 1199.
  13. Kokovin, Sergey & Thisse, Jacques-François & Zhelobodko, Evgeny, 2010. "Monopolistic Competition: Beyond the CES," CEPR Discussion Papers 7947, C.E.P.R. Discussion Papers.
  14. Pol Antras & Elhanan Helpman, 2003. "Global Sourcing," Harvard Institute of Economic Research Working Papers 2005, Harvard - Institute of Economic Research.
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  16. Bertoletti, Paolo & Epifani, Paolo, 2014. "Monopolistic competition: CES redux?," Journal of International Economics, Elsevier, vol. 93(2), pages 227-238.
  17. Costinot, Arnaud, 2007. "Heterogeneity and Trade," University of California at San Diego, Economics Working Paper Series qt4ns3899g, Department of Economics, UC San Diego.
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