This paper presents estimates of the productivity and factor bias effects of interindustry Ramp;D spillovers for five high-tech industries. Each industry is distinguished as a separate spillover source. The industries are each affected by Ramp;D spillovers and are themselves spillover sources....

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...