There is little question that new product innovation is a cornerstone to firm success. Particularly in technologically dynamic markets like personal computers, new products are central to long-term financial performance. However, exactly how new product introductions influence firm value is less...

We explore the extent to which R&D and advertising expenditures generate a comparative advantage that allows firms to earn supranormal profits. After controlling for unobserved firm-specific factors and the feedback between discretionary expenditures and profitability, our results suggest...

We empirically study the dynamics of R&D productivity by firm size over an industry's life cycle. To do this, we examine the relationship between R&D expenditures, firm size, and new product introductions at the firm level in the personal computer industry. In general, we find the following. (1)...