Oligopoly 355Paper mills 46 67
Coffee 43 58
Television broadcasting 43 56
Rubber 43 65
Ski facilities 42 53
Software 39 47
Toys 36 51
Boat building 35 43
Internet service 34 49
Book publishing 33 48 68
Basic chemicals 33 44 60
Supermarkets 32 46 59
Internet shopping 31 37 85
Pharmaceuticals 30 47 69
Newspapers 29 45 63
Women’s dresses 28 39 69
Life insurance 27 44 75
Office furniture 26 34 42
Advertising agencies 24 29 33
Concrete 23 28 40
Hotels 23 28 35
Motor vehicle parts 19 28 42
Elder care homes 19 23 30
Funeral homes 16 17 18
Electric power 15 27 54
Furniture stores 14 19 27
Management consulting 14 19 26
Used car dealers 13 14 16
Furniture 11 19 30
Trucking 9 15 21
Bolts, nuts, screws 9 12 19
Restaurants 9 12 17
Liquor Stores 8 13 19
Musical groups and artists 7 11 20
Veterinary services 7 8 9
Legal offices 2.6 4.6 9.0
Florists 2.1 2.9 4.5
Auto repair 1.7 2.6 4.3
Dry cleaners 1.4 2.2 3.9Source:U.S. Bureau of the Census, 2007, and industry reports.Concentration Ratio
Product or Service 4 Firms 8 Firms 20 FirmsTABLE 9.1
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