INDUSTRY EFFECTS AND APPROPRIABILITY MEASURES IN THE STOCK MARKETS VALUATION OF R-AND-D AND PATENTS

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作者：

COCKBURN, I

GRILICHES, Z

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AMERICAN ECONOMIC REVIEW | 1988年 / 78卷 / 02期

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F [经济];

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02 ;

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页码：419 / 423

页数：5

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