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UCL Department of Economics

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Cemmap seminar presented by Mogens Fosgerau (Copenhagen)

05 November 2019, 12:30 pm–1:30 pm

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The Inverse Product Differentiation Logit Model

Event Information

Open to

UCL staff | UCL students

Organiser

Daniel Wilhelm

Location

IFS Conference Room
IFS
7 Ridgemount Street
London
WC1E 7AE
United Kingdom

 

Abstract: This paper proposes an empirical model of inverse demand for differentiated products: the Inverse Product Differentiation Logit (IPDL) model. The IPDL model generalizes the commonly used nested logit model to allow richer substitution patterns, including complementarity. Nevertheless, the IDPL model can be estimated by two-stage least squares using aggregate data. We apply the IDPL model to data on ready-to-eat cereals in Chicago in 1991-1992, and find that complementarity is pervasive in this market. We then show that the IPDL model belongs to a wider class of inverse demand models in which products can be complements, and which is sufficiently large to encompass a large class of discrete choice demand models. We establish invertibility for this wider class, thus extending previous results on demand inversion.

Paper can be found

About the Speaker

Mogens Fosgerau

at Copenhagen

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