&D investment: (1) Are there diminishing returns to inventive activities? (2) What is the relationship between R&D and productivity … between R&D expenditures and growth of output or total factor productivity. The relation is pervasive, though the magnitudes …, there is evidence that R&D as a factor of production affects not only productivity growth but also the demand for …

productivity. We investigate these phenomena further by examining the relationship between plant-level productivity and firm …-level R&D. We find that (1) the productivity-enhancing effects of parent firm R&D are diminished by geographic distance from … the research lab and `technological' distance between the product-field focus of the R&D and the plants; (2) productivity …

countries matters for productivity, because a country that imports primarily from technological leaders receives more technology … trade patterns in determining technology flows that affect productivity by using industry level data for machinery goods … imports and productivity in eight OECD countries between 1970-91. First evidence that these countries benefit more from …

This paper explores the implications of a simple model of learning and innovation by firms. In this model R … effect of spillovers on research productivity of firms exceeds the structural effect because it includes an active learning … learning and innovation, with learning responding to opportunities, innovation responding to learning and own R&D, and a stream …

star scientists and firms have a large positive impact on firms'" research productivity, increasing the average firm … that the universities' local economic development impact is lessened. Stars'" scientific productivity is increased less …

manufacturing industries. The estimated elasticities of productivity with respect to Ramp;D capital are significant and plausible …

total factor productivity and that they impact the degree of Ramp;D spillovers …