Concentration in US Labor Markets: Evidence From Online Vacancy Data

Jose Azar, Ioana Marinescu, Marshall Steinbaum and Bledi Taska

No 24395, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: 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 4,378, or the equivalent of 2.3 recruiting employers. 60% of labor markets are highly concentrated (above 2,500 HHI) according to the DOJ/FTC guidelines. Highly concentrated markets account for 20% of employment. For manufacturing industries, we show that labor market concentration is distinct from product market concentration, and is negatively correlated with wages in each industry’s top occupation.

JEL-codes: J21 J42 K21 (search for similar items in EconPapers)
Date: 2018-03
New Economics Papers: this item is included in nep-lma and nep-ure
Note: IO LE LS
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Published as José Azar & Ioana Marinescu & Marshall Steinbaum & Bledi Taska, 2020. "Concentration in US labor markets: Evidence from online vacancy data," Labour Economics, vol 66.

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Journal Article: Concentration in US labor markets: Evidence from online vacancy data (2020)
Working Paper: Concentration in US Labor Markets: Evidence from Online Vacancy Data (2018)
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