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I. Introduction, 290. — II. Size of firm and the profitability of its investment in the innovation, 291. — III. Model and data, 294. — IV. Empirical results, 297. — V. Growth rate, profitability, age of president, liquidity, and profit trend, 302. — VI. Concentration of technical leadership, 305. — VII. Summary and conclusions, 309.
Edwin Mansfield (Wed,) studied this question.