Some Empirical Regularities in Market Shares
AbstractWe present some empirical regularities in the market shares of brands. Our cross-sectional data on market shares consists of 1,171 brands in 91 product categories of foods and sporting goods sold in the United States. One of our results is that the pattern of market shares for each of the categories (many of which are fundamentally dissimilar, such as breakfast cereals and rifles) is represented well by the power law. The power law also does better than an alternative model--namely, the exponential form--which has previously been studied in the literature but without having been compared to any alternative. These two models have sharply different implications; for example, the power law predicts that the ratio of market shares for two successively ranked brands becomes smaller as one progresses from higher-ranked to lower-ranked brands, whereas the exponential form predicts that this ratio is a constant. Our findings have several managerial and research implications, which we summarize.
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Bibliographic InfoArticle provided by INFORMS in its journal Management Science.
Volume (Year): 52 (2006)
Issue (Month): 11 (November)
marketing; product policy; competitive strategy;
Other versions of this item:
- Raaj Sah & Rajeev Kohli, 2004. "Market Shares: Some Power Law Results and Observations," Working Papers 0401, Harris School of Public Policy Studies, University of Chicago.
- Rajeev Kohli & Raaj Sah, 2005. "Some Patterns of Market Shares of Brands Within and Across Product Categories," Working Papers 0604, Harris School of Public Policy Studies, University of Chicago.
- Rajeev Kohli & Raaj Sah, 2005. "Some Patterns of Market Shares of Brands Within and Across Product Categories," Working Papers 11-2005, Singapore Management University, School of Economics.
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