The value relevance of R&D across profit and loss firms

We examine whether the valuation relevance of R&D documented for loss firms extends to profit firms. We use the residual-income valuation model and show that the valuation multiplier on R&D expenditures is likely to be negative (positive) for profit (loss) firms. This occurs because the linear information dynamics assumption of the residual-income model is more appropriate for profit firms than loss firms. Earnings of profit firms are likely to contain information on the future benefits of R&D activity, however, earnings of loss firms do not contain such information. The empirical evidence confirms our predictions for profit and loss firms. An important implication of our findings is that understanding the role of the R&D expense line item in valuation across firms and within firms, across time depends on whether the linear information dynamics assumption of the residual-income model is applicable for the sample of firms under investigation. (C) 2008 Elsevier Inc. All rights reserved.