Media type: E-Article Title: Competition and Product Variety Contributor: Lancaster, Kelvin imprint: University of Chicago Press, 1980 Published in: The Journal of Business Language: English DOI: 10.1086/296102 ISSN: 0021-9398; 1537-5374 Keywords: Statistics, Probability and Uncertainty ; Economics and Econometrics ; Business and International Management Origination: Footnote: