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How does income inequality affect market outcomes in vertically differentiated markets?

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  • Yurko, Anna V.

Abstract

The distribution of consumer incomes is a key factor in determining the structure of a vertically differentiated industry when consumer's willingness to pay depends on her income. This paper computes the Shaked and Sutton (1982) model for a lognormal distribution of consumer incomes to investigate the effect of inequality on firms' entry, product quality, and pricing decisions. The main findings are that greater inequality in consumer incomes leads to the entry of more firms and results in more intense quality competition among the entrants. More intense quality competition raises the average quality of products in the market as firms compete for the shrinking share of higher-income consumers. With zero costs of quality improvements and an upper bound on the top quality or when costs of quality are fixed and rise sufficiently fast, greater heterogeneity of consumer incomes also reduces firms' incentives to differentiate their products. Competition between more similar products tends to reduce their prices. However, when income inequality is very high, the top quality producer chooses to serve only the rich segment of the market and charges a higher price. The conclusion is that income inequality has important implications for the degree of product differentiation, price level, industry concentration, and consumer welfare.

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Bibliographic Info

Article provided by Elsevier in its journal International Journal of Industrial Organization.

Volume (Year): 29 (2011)
Issue (Month): 4 (July)
Pages: 493-503

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Handle: RePEc:eee:indorg:v:29:y:2011:i:4:p:493-503

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Web page: http://www.elsevier.com/locate/inca/505551

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Keywords: Vertical differentiation Income inequality Computational economics;

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References

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  1. GABSZEWICZ, Jean J. & THISSE, Jacques-François, . "Entry (and exit) in a differentiated industry," CORE Discussion Papers RP -400, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
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  7. GABSZEWICZ, Jean J. & THISSE, Jacques-François, . "Price competition, quality and income disparities," CORE Discussion Papers RP -370, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
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Cited by:
  1. OSHARIN, Alexander & THISSE, Jacques-François & USHCHEV, Philip & VERBUS, Valery, 2013. "Monopolistic competition and income dispersion," CORE Discussion Papers 2013071, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
  2. Namrata Gulati & Prabal Roy Chowdhury, 2010. "Income inequality, neighbourhood effects and product quality," Indian Statistical Institute, Planning Unit, New Delhi Discussion Papers 10-06, Indian Statistical Institute, New Delhi, India.

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