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Specialization vs Competition: An Anatomy of Increasing Returns to Scale

Listed author(s):
  • Alberto Bucci

    ()

    (National Research University Higher School of Economics)

  • Philip Ushchev

    ()

    (National Research University Higher School of Economics)

We develop a two-sector model of monopolistic competition with a dierentiated intermediate good and variable elasticity of technological substitution. This setting proves to be well-suited to studying the nature and origins of external increasing returns. We disentangle two sources of scale economies: specialization and competition. The former depends only on how TFP varies with input diversity, while the latter is fully captured by the behavior of the elasticity of substitution across inputs. This distinction gives rise to a full characterization of the rich array of competition regimes in our model. The necessary and sucient conditions for each regime to occur are expressed in terms of the relationships between TFP and the elasticity of substitution as functions of the input diversity. Moreover, we demonstrate that, despite the folk wisdom resting on CES models, specialization economies are in general neither necessary nor sucient for external increasing returns to emerge. This highlights the profound and non-trivial role of market competition in generating agglomeration economies, endogenous growth, and other phenomena driven by scale economies.

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File URL: https://www.hse.ru/data/2016/04/21/1130127946/134EC2016.pdf
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Paper provided by National Research University Higher School of Economics in its series HSE Working papers with number WP BRP 134/EC/2016.

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Length: 31 pages
Date of creation: 2016
Publication status: Published in WP BRP Series: Economics / EC, April 2016, pages 1-31
Handle: RePEc:hig:wpaper:134/ec/2016
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