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Concentration in US labor markets: Evidence from online vacancy data

José Azar, Ioana Marinescu (), Marshall Steinbaum and Bledi Taska

Labour Economics, 2020, vol. 66, issue C

Abstract: Using data on the near-universe of US online 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 4,378, or the equivalent of 2.3 recruiting employers. 60% of labor markets are highly concentrated (above 2500 HHI). Highly concentrated markets account for 16% of employment. Labor market concentration is negatively correlated with wages, and there is no relationship between measured concentration and an occupation’s skill level. These indicators suggest that employer concentration is a meaningful measure of employer power in labor markets, that there is a high degree of employer power in labor markets, and also that it varies widely across occupations and geography.

Keywords: Monopsony; Oligopsony; Labor markets (search for similar items in EconPapers)
Date: 2020
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Working Paper: Concentration in US Labor Markets: Evidence from Online Vacancy Data (2018) Downloads
Working Paper: Concentration in US Labor Markets: Evidence From Online Vacancy Data (2018) Downloads
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DOI: 10.1016/j.labeco.2020.101886

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