We study how exploration versus exploitation innovations impact economic growth through a tractable endogenous growth framework that contains multiple innovation sizes, multi-product firms, and entry/exit. Firms invest in exploration R&D to acquire new product lines and exploitation R&D to...

We simultaneously assess the contributions to productivity of three sources of research and development spillovers: geographic, technology and product-market proximity. To do this, we construct a new measure of geographic proximity that is based on the distribution of a firm's inventor locations...

This paper presents a theoretical model of faculty consulting in the context of government and industry funding for research within the university, which then frames an empirical analysis of the funding and consulting of 458 individual faculty inventors from 8 major US universities. In the...

In the US and many other OECD countries, expenditures for defense-related R&D represents a key policy channel through which governments shape innovation, and dwarf all other public subsidies for innovation. We examine the impact of government funding for R&D - and defense-related R&D in...

This paper is a first step toward closing the analytical gap in the extensive literature on the results of interactions between public and private R&D expenditures, and their joint effects on the economy. Econometric studies in this area report a plethora of sometimes confusing and frequently...

This paper introduces a general equilibrium model of endogenous technical change through basic and applied research. Basic research differs from applied research in the nature and the magnitude of the generated spillovers. We propose a novel way of empirically identifying these spillovers and...

Support for Ramp;D subsidies relies on empirical evidence that Ramp;D quot;spills overquot; between firms. But firm performance is affected by two countervailing Ramp;D spillovers: positive effects from technology spillovers and negative business stealing effects from Ramp;D by product market...