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Numerous accounting studies claim that investors fail to rationally price accrual-related information and that investors are functionally fixated. This study documents the importance of performing robustness tests when testing economic or behavioral explanations for apparent accounting-related security mispricing. We find that performing robustness tests that exclude a small number of firm-year observations (approximately 200 firm-year observations or about 1% of the entire sample) reveals an inverted U-shaped relation between buy-and-hold abnormal returns and total accruals. An inverted U-shaped relation is inconsistent with the functional fixation (earnings fixation) hypothesis. We conduct similar robustness tests for the abnormal accrual anomaly and the net operating assets anomaly proposed by other investigators, and also find an inverted U-shaped relation between buy-and-hold abnormal returns and abnormal accruals and net operating assets. These findings are inconsistent with the explanations put forth by those investigators. Such evidence leads us to conclude that the accrual-related anomalies are unlikely to be due to investors' inability to process accounting information, as suggested by the functional fixation hypotheses tested. Copyright University of Chicago on behalf of the Institute of Professional Accounting, 2006.

Consistent with the uncertainty of research and development’s future benefits, prior accounting studies hypothesize and find a positive relation between research and development (R&D) and the variability of future earnings. However, prior research has assumed constant marginal productivity of R&D in the cross section. We relax this assumption and advance the accounting literature on the informational role of R&D by studying how measures of innovation outputs, namely patent counts and patent citations, which proxy for the economic value of innovation, are related to firms’ future performance. We predict and find that firms’ future operating performance is positively related to the quality of their patents and that this relation is stronger for more productive and innovative firms. We also predict and find that the volatility of future operating performance is negatively related to patent quality and that the relation is stronger for firms with higher R&D expenditures and larger patent portfolios. Overall, firms that have R&D that is more productive exhibit higher and less volatile future operating performance. One contribution of our study is that it demonstrates that the relation between R&D expense (i.e., inputs) and future operating performance is better understood by incorporating information about the productivity’ (i.e., outputs) of a firm’s R&D outlays in the form of patent counts and citations.

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