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Estimation of random coefficients logit demand models with interactive fixed effects

Authors: Hyungsik Roger Moon , Matthew Shum and Martin Weidner
Date: 22 February 2017
Type: cemmap Working Paper, CWP12/17

Abstract

We extend the Berry, Levinsohn and Pakes (BLP, 1995) random coeffcients discrete-choice demand model, which underlies much recent empirical work in IO. We add interactive fixed effects in the form of a factor structure on the unobserved product characteristics. The interactive fixed effects can be arbitrarily correlated with the observed product characteristics (including price), which accommodates endogeneity and, at the same time, captures strong persistence in market shares across products and markets. We propose a two-step least squares-minimum distance (LS-MD) procedure to calculate the estimator. Our estimator is easy to compute, and Monte Carlo simulations show that it performs well. We consider an empirical illustration to US automobile demand.

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Previous version:
Hyungsik Roger Roger Moon, Matthew Shum and Martin Weidner April 2014, Estimation of random coefficients logit demand models with interactive fixed effects, cemmap Working Paper, CWP20/14
Hyungsik Roger Roger Moon, Matthew Shum and Martin Weidner March 2012, Estimation of random coefficients logit demand models with interactive fixed effects, cemmap Working Paper, CWP08/12

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