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Open Access Publications from the University of California

Identification of Supply Models of Retailer and Manufacturer Oligopoly Pricing

  • Author(s): Villas-Boas, Sofia;
  • Hellerstein, Rebecca
  • et al.

This note outlines conditions under which we can identify a vertical supply model of multiple retailers’ and manufacturers’ oligopoly-pricing behavior. This is an important question particularly when the researcher believes, contrary to the traditional assumption followed in the empirical literature, that retailers may not be neutral pass-through intermediaries. We show that a data-set of an industry’s product prices, quantities, and input prices over time is sufficient to identify the vertical model of retailers’ and manufacturers’ oligopoly-pricing behavior given nonlinear demand, for homogeneous-products industries, and given multi-product firms, for differentiated-products industries.

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