We empirically study the dynamics of R&D productivity by firm size over an industry's life cycle. To do this, we … computer industry. In general, we find the following. (1) Although R&D productivity generally shows decreasing marginal returns … life cycle. (2) In the early part of the industry life cycle, small firms exhibit greater R&D productivity than large firms …

: computers and electronic products. In most of manufacturing, real GDP growth has been weak or negative and productivity growth … that, when adjusted for product quality improvements, are falling rapidly. Productivity growth in these industries, in turn …