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TABLE 1.-VALUE OF SHIPMENTS AND CONCENTRATION RATIOS OF ECONOMICALLY SIGNIFICANT PRODUCTS IN HIGHLY CONCENTRATED PRODUCT-CLASS GROUPS, 19541-Continued

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TABLE I-VALUE OF SHIPMENTS AND CONCENTRATION RATIOS OF ECONOMICALLY SIGNIFICANT PRODUCTS IN HIGHLY CONCENTRATED PRODUCT-CLASS GROUPS, 19541-Continued

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TABLE I-VALUE OF SHIPMENTS AND CONCENTRATION RATIOS OF ECONOMICALLY SIGNIFICANT PRODUCTS IN HIGHLY CONCENTRATED PRODUCT-CLASS GROUPS, 19541-Continued

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1 Covers product classes with shipments of $200,000,000 or more within product-class groups having 4-company concentration ratios of 40 percent or more, arrayed in order of concentration ratios of product-class groups.

2 Product classes and product-class groups primary to the industries designated by the first 4 digits of the indicated SIC code numbers.

3 Represents for each product class the total value shipped by producers in all industries, and for each product-class group the total value of primary products of the corresponding 4-digit industry shipped by all producers in all industries. 4 Concentration ratio withheld to avoid disclosing figures for individual companies.

Less than 50 percent of primary products of the industry are produced by plants classified in the industry.

Includes product class 32311, which is primary to this industry as well as to industry 3231.

7 Does not include product classes primary both to this industry and to another industry and to which has been assigned the 4-digit code of the other industry.

Excludes data for locomotives, railroad cars, and street cars manufactured in car shops of operating railroads.

Included because product classes 37411 and 37414 are intimately related and their combined shipments total substantially over $200,000,000.

10 Concentration ration withheld to avoid disclosing figures for individual companies.

11 Concentration ratio of the corresponding 4-digit industry based on value added in manufacture. Concentration ratio and total value of shipments for the product-class group omitted because of extensive duplication in the data.

12 Represents value of work done rather than shipments.

13 Includes Government-owned plants operated by private companies.

14 Excludes the value of these products produced and consumed within the same plants in the manufacture of other products.

15 Includes automotive diesel engines, amounting to $39,000,000.

16 Includes the value of nonferrous alloys produced by primary smelters and refiners from primary materials.

Source: Senate Subcommittee on Antitrust and Monopoly, "Concentration in American Industry," 1957.

TABLE I-VALUE OF SHIPMENTS AND CONCENTRATION RATIOS OF ECONOMICALLY SIGNIFICANT PRODUCTS IN HIGHLY CONCENTRATED PRODUCT CLASSES BUT IN RELATIVELY UNCONCENTRATED PRODUCT-CLASS GROUPS 1

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TABLE II-VALUE OF SHIPMENTS AND CONCENTRATION RATIOS OF ECONOMICALLY SIGNIFICANT PRODUCTS IN HIGHLY CONCENTRATED PRODUCT CLASSES BUT IN RELATIVELY UNCONCENTRATED PRODUCT-CLASS

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TABLE II.-VALUE OF SHIPMENTS AND CONCENTRATION RATIOS OF ECONOMICALLY SIGNIFICANT PRODUCTS IN HIGHLY CONCENTRATED PRODUCT CLASSES BUT IN RELATIVELY UNCONCENTRATED PRODUCT-CLASS GROUPS 1-Continued

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1 Covers product classes with shipments of $200,000,000 or more and 4-company concentration ratios of 40 percent or more within product-class groups having concentration ratios below 40 percent, arrayed in order of concentration ratios of product-class groups.

Product classes and product-class groups primary to the industries designated by the first 4 digits of the indicated SIC code numbers.

Represents for each product class the total value shipped by producers in all industries, and for each product-class group the total value of primary products of the corresponding 4-digit industry shipped by all producers in all industries. Does not include product classes primary both to this industry and to another industry and to which has been assigned the 4-digit code of the other industry.

$ Includes shipments of products from establishments classified in industries 2011 and 2013 to other meatpacking or prepared meat establishments.

Less than 50 percent of primary products of the industry are produced by plants classified in the industry. Concentration ratio of the corresponding 4-digit industry based on value added in manufacture. Concentration ratio and total value of shipments for the product-class group omitted because of extensive duplication in the data. *Does not meet $200,000,000 of shipments criterion, but included because of the great increase in shipments since 1954. Includes yarns spun on silk system.

Source: Senate Subcommittee on Antitrust and Monopoly, "Concentration in American Industry," 1957.

TABLE III-4-COMPANY CONCENTRATION RATIOS FOR SELECTED 4-DIGIT INDUSTRIES COMPARED WITH CONCENTRATION RATIOS FOR CORRESPONDING PRODUCT-CLASS GROUPS

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