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Local and National Concentration Trends in Jobs and Sales: The Role of Structural Transformation

November 2023

Working Paper Number:

CES-23-59

Abstract

National U.S. industrial concentration rose between 1992-2017. Simultaneously, the Herfindhahl Index of local (six-digit-NAICS by county) employment concentration fell. This divergence between national and local employment concentration is due to structural transformation. Both sales and employment concentration rose within industry-by-county cells. But activity shifted from concentrated Manufacturing towards relatively un-concentrated Services. A stronger between-sector shift in employment relative to sales explains the fall in local employment concentration. Had sectoral employment shares remained at their 1992 levels, average local employment concentration would have risen by 9% by 2017 rather than falling by 7%.

Document Tags and Keywords

Keywords Keywords are automatically generated using KeyBERT, a powerful and innovative keyword extraction tool that utilizes BERT embeddings to ensure high-quality and contextually relevant keywords.

By analyzing the content of working papers, KeyBERT identifies terms and phrases that capture the essence of the text, highlighting the most significant topics and trends. This approach not only enhances searchability but provides connections that go beyond potentially domain-specific author-defined keywords.
:
market, industrial, sale, manufacturing, growth, employed, employ, labor, sector, establishment, employment estimates, sectoral, wholesale, industry concentration, gdp, concentration, labor markets, employment trends

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Bureau of Labor Statistics, Standard Industrial Classification, National Bureau of Economic Research, National Income and Product Accounts, Longitudinal Business Database, Retail Trade, Economic Census, Wholesale Trade, North American Industry Classification System, Sloan Foundation, Herfindahl Hirschman Index, Census Bureau Disclosure Review Board, Disclosure Review Board, Federal Statistical Research Data Center

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