An Examination of Long-Term Abnormal Stock Returns and Operating Performance Following R&D Increases
We examine a sample of 8,313 cases, between 1951 and 2001, where firms unexpectedly increase their research and development (R&D) expenditures by a significant amount. We find consistent evidence of a misreaction, as manifested in the significantly positive abnormal stock returns that our sample firms' shareholders experience following these increases. We also find consistent evidence that our sample firms experience significantly positive long-term abnormal operating performance following their R&D increases. Our findings suggest that R&D increases are beneficial investments, and that the market is slow to recognize the extent of this benefit (consistent with investor underreaction). Copyright 2004 by The American Finance Association.
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Volume (Year): 59 (2004)
Issue (Month): 2 (04)
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