CHARLES BERRY, a longtime economics professor and creator of the “Berry ratio,” died of cancer Sept. 2 in Princeton. He was 77. Berry developed his ratio, which measures profitability by relating a company’s gross profits to its operating expenses, to evaluate transfer payments between companies and their subsidiaries. The tool is used in tax law in the United States and abroad. A member of the Princeton faculty from 1966 to 1995, Berry also served as an associate dean of the Woodrow Wilson School and as master of Rockefeller College.
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