%0 Report
        %A Azar, José
%A Marinescu, Ioana E.
%A Steinbaum, Marshall
%A Taska, Bledi
        %T Concentration in US Labor Markets: Evidence from Online Vacancy Data
        %D 2018
        %8 2018 Mar
        %I Institute of Labor Economics (IZA)
        %C Bonn
        %7 IZA Discussion Paper
        %N 11379
        %U https://www.iza.org/publications/dp11379
        %X Using data on the near-universe of online US job vacancies collected by Burning Glass Technologies in 2016, we calculate labor market concentration using the Herfindahl-Hirschman index (HHI) for each commuting zone by 6-digit SOC occupation. The average market has an HHI of 3,953, or the equivalent of 2.5 recruiting employers. 54% of labor markets are highly concentrated (above 2,500 HHI) according to the DOJ/FTC guidelines. Highly concentrated markets account for 17% of employment. All plausible alternative market definitions show that more than 33% of markets are highly concentrated, suggesting that employers have market power in many US labor markets.
        %K labor markets
%K oligopsony
%K monopsony
%K competition policy