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Journal article
Monopolistic competition and optimum product diversity under firm heterogeneity
Swati Dhingra and John Morrow
February 2019
Paper No' :

Tags: competition (economics); demand-side management; economic policy; empirical analysis; firm size; heterogeneity; monopoly; product development; welfare economics

Empirical work has drawn attention to the high degree of productivity differences within industries and their role in resource allocation. This paper examines the allocational efficiency of such markets. Productivity differences introduce two new margins of potential inefficiency: selection of the right distribution of firms and allocation of the right quantities across firms. We show that these considerations affect welfare and policy analysis, and market power across firms leads to distortions in resource allocation. Demand-side elasticities determine how resources are misallocated and when increased competition from market expansion provides welfare gains. © 2019 by The University of Chicago. All rights reserved.