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Nursery Cities: Urban Diversity, Process Innovation and the Life-Cycle of Products

  • Gilles Duranton
  • Diego Puga

A simple model of process innovation is proposed, where firms learn about their ideal production process by making prototypes. We build around this a dynamic general equilibrium model, and derive conditions under which diversified and specialised cities coexist. New products are developed in diversified cities, trying processes borrowed from different activities. On finding their ideal process, firms switch to mass-production and relocate to specialised cities with lower costs. When in equilibrium, this configuration welfare-dominates those with only diversified or only specialised cities. We find strong evidence of this relocation pattern in establishment relocations across French employment areas 1993û1996.

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Paper provided by Centre for Economic Performance, LSE in its series CEP Discussion Papers with number dp0445.

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Date of creation: Feb 2000
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Handle: RePEc:cep:cepdps:dp0445
Contact details of provider: Web page: http://cep.lse.ac.uk/_new/publications/series.asp?prog=CEP

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