{"title":"The Opoly Number","authors":"Michael Poulshock","doi":"10.2139/ssrn.3495139","DOIUrl":null,"url":null,"abstract":"We propose a slight modification to the Herfindahl-Herschman Index of market concentration, resulting in a formula that indicates the number of firms dominating a market. We call this metric the opoly number because it has a value of 1 for a monopoly, 2 for a duopoly, etc.","PeriodicalId":142139,"journal":{"name":"ERN: Monopoly","volume":"8 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ERN: Monopoly","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2139/ssrn.3495139","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
We propose a slight modification to the Herfindahl-Herschman Index of market concentration, resulting in a formula that indicates the number of firms dominating a market. We call this metric the opoly number because it has a value of 1 for a monopoly, 2 for a duopoly, etc.
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