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Selection Effects with Heterogeneous Firms

Listed author(s):
  • Peter Neary
  • Monika Mrazova

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 market-access 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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File URL: http://www.economics.ox.ac.uk/materials/papers/5560/paper588.pdf
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Paper provided by University of Oxford, Department of Economics in its series Economics Series Working Papers with number 588.

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Date of creation: 01 Dec 2011
Handle: RePEc:oxf:wpaper:588
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Web page: http://www.economics.ox.ac.uk/
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  1. Elhanan Helpman & Oleg Itskhoki & Stephen Redding, 2008. "Inequality and Unemployment in a Global Economy," NBER Working Papers 14478, National Bureau of Economic Research, Inc.
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