The four firm concentration ratio (CR4) measures the market share of the four largest firms in an industry. Between 2002 and 2017, the industry in the United States which experienced the greatest increase in CR4 was Third Party Administration of Insurance and Pension Funds (+64 percent), followed by Taxi Services (+60 percent) and Residential Electrical Lighting Fixture Manufacturing (+40.8 percent). Concentration ratios of 50 percent and above are considered to be uncompetitive or oligopolistic markets.
Four firm concentration ratio (CR4) for the twenty U.S. industries with the largest increases between 2002 and 2017
Industry
Concentration Ratio 2002
Concentration Ratio 2017
Newsprint Mills
53.9%
90.4%
Radio Networks
53.8%
83%
Ammunition (except Small Arms) Manufacturing
52.9%
82.8%
Luggage and Leather Goods Stores
49.8%
81.5%
Geothermal Electric Power Generation
54.5%
81.4%
Other Performing Arts Companies
47.8%
80.7%
Third Party Admin. of Insurance and Pension Funds
14.2%
78%
Taxi Service
17.6%
77.2%
Photofinishing Laboratories (except One-Hour)
45.3%
75.6%
Paint and Wallpaper Stores
47.3%
75.1%
Scheduled Passenger Air Transportation
33.6%
71.1%
Residential Electric Lighting Fixture Manufacturing
30.2%
71%
Nonscheduled Chartered Freight Air Transportation
36.8%
67.8%
Scale and Balance Manufacturing
34.3%
66.5%
Travel Trailer and Camper Manufacturing
38%
66.2%
Telecommunications Resellers
25.3%
59.9%
All Other Misc. Nonmetallic Mineral Product Manuf.
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US Census Bureau, & ITIF. (June 1, 2021). Four firm concentration ratio (CR4) for the twenty U.S. industries with the largest increases between 2002 and 2017 [Graph]. In Statista. Retrieved December 23, 2024, from https://www.statista.com/statistics/1340750/us-industries-concentration-ratio-biggest-increases/
US Census Bureau, und ITIF. "Four firm concentration ratio (CR4) for the twenty U.S. industries with the largest increases between 2002 and 2017." Chart. June 1, 2021. Statista. Accessed December 23, 2024. https://www.statista.com/statistics/1340750/us-industries-concentration-ratio-biggest-increases/
US Census Bureau, ITIF. (2021). Four firm concentration ratio (CR4) for the twenty U.S. industries with the largest increases between 2002 and 2017. Statista. Statista Inc.. Accessed: December 23, 2024. https://www.statista.com/statistics/1340750/us-industries-concentration-ratio-biggest-increases/
US Census Bureau, and ITIF. "Four Firm Concentration Ratio (Cr4) for The Twenty U.S. Industries with The Largest Increases between 2002 and 2017." Statista, Statista Inc., 1 Jun 2021, https://www.statista.com/statistics/1340750/us-industries-concentration-ratio-biggest-increases/
US Census Bureau & ITIF, Four firm concentration ratio (CR4) for the twenty U.S. industries with the largest increases between 2002 and 2017 Statista, https://www.statista.com/statistics/1340750/us-industries-concentration-ratio-biggest-increases/ (last visited December 23, 2024)
Four firm concentration ratio (CR4) for the twenty U.S. industries with the largest increases between 2002 and 2017 [Graph], US Census Bureau, & ITIF, June 1, 2021. [Online]. Available: https://www.statista.com/statistics/1340750/us-industries-concentration-ratio-biggest-increases/
