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Inter-industry differences in profitability: the legacy of the structure-efficiency debate revisited

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  • Chang-Yang Lee
  • Ishtiaq P. Mahmood

Abstract

This study presents a simple model on the sources of inter-industry variation in profitability and tests its empirical implications in order to shed new light on the long-lasting debate over industry profitability. The model identifies four key factors that jointly influence an industry's price-cost margin: (i) the intensity of strategic investment (e.g. R&D and advertising), (ii) the skewness of the distribution of market share or market concentration, (iii) the appropriability of strategic investment, and (iv) the extent to which firms' market shares are determined by the intensity of their strategic investment. These factors are expected to be positively related to industry profitability, and our empirical analysis provides supportive evidence. The model also suggests that the conventional, single-dimensional hypotheses on profitability-the market-power (or market-structure) hypothesis and the efficiency hypothesis-are overly simplified. More importantly, existing empirical results allegedly supporting each of these hypotheses are spurious to the extent that the distribution of firm-specific strategic competence reflects firm heterogeneity in efficiency and, at the same time, underlies the distribution of market share or market concentration. Copyright 2009 , Oxford University Press.

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Bibliographic Info

Article provided by Oxford University Press in its journal Industrial and Corporate Change.

Volume (Year): 18 (2009)
Issue (Month): 3 (June)
Pages: 351-380

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Handle: RePEc:oup:indcch:v:18:y:2009:i:3:p:351-380

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