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Linear Demand Systems are Consistent with Discrete Choice

Afonso Rodrigues · 2026 · arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.13785 · cited by 0 works (OpenAlex) · open-access PDF

Portuguese

Os sistemas de demanda linear agregada podem ser micro-fundados por uma população de consumidores heterogêneos que fazem escolhas discretas. Eles também podem ser estendidos para incorporar efeitos de renda. Eu comprovo esses resultados e mostro como estimar estruturalmente esta classe de modelos usando apenas dados de nível de mercado. A distribuição de preferências do consumidor é recuperada disciplinando as soluções de canto com termos agregados apenas. Esta abordagem permite a mesma riqueza de Berry, Levinsohn, e Pakes (1995) [BLP] mantendo as vantagens analíticas e computacionais da demanda linear: não requer fixação exogênica do tamanho do mercado, permite a heterogeneidade em conjuntos de escolha, e resulta em uma matriz de substituição flexível que varia endogênicamente como diferentes consumidores entram / saem do mercado

Machine translation (Meta M2M100); the English original follows.

Abstract

Aggregate linear demand systems can be micro-founded by a population of heterogeneous consumers making discrete choices. They can also be extended to incorporate income effects. I prove these results and show how to structurally estimate this class of models using only market-level data. The distribution of consumer preferences is recovered by disciplining the corner solutions with aggregate terms only. This approach allows for the same richness of Berry, Levinsohn, and Pakes (1995) [BLP] while retaining the analytical and computational advantages of linear demand: it does not require exogenously fixing market size, allows for heterogeneity in choice sets, and results in a flexible substitution matrix which varies endogenously as different consumers enter/exit the market. The discrete-choice microfoundation facilitates welfare analysis and the flexible measurement of markups an cost pass-throughs, among a wide range of other applications.

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Topics: Aggregate (composite), Economics, Econometrics, Discrete choice, Class (philosophy), Population

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