In this paper we analyze the evidence from a large number of studies on three specific questions pertaining to R&D investment: (1) Are there diminishing returns to inventive activities? (2) What is the relationship between R&D and productivity and what are the magnitudes of the returns to a...

This paper estimates the effects of intranational and international R&D spillovers on the cost and production structure for ten Canadian and Japanese manufacturing industries. Domestic spillovers generate greater effects on average variable cost and factor intensities compared to international...