We develop a dynamic duopoly model of R&D competition to improve the quality of a finalgood. The innovation process is sequential and cumulative, and takes place alongside productionin an infinite-horizon setting. In this context we study the R&D incentive impacts resultingfrom a “research...

Biological innovations in agriculture did not enjoy protection by formal intellectual property rights (IPRs) for a long time, but the recent trend has been one of considerable broadening and strengthening of these rights. We document the nature and evolution of these IPRs and provide an...

This chapter investigates the extent to which agricultural innovations draw on ideas originating outside of agriculture. We identify a large set of US patents for agricultural technologies granted between 1976 and 2018. To measure knowledge spillovers to these patents, we rely on three proxies:...

We develop a discrete-choice model of differentiated products for U.S. corn and soybean seed demand to study the welfare impact of genetically engineered (GE) crop varieties. Using a unique dataset spanning the period 1996-2011, we find that the welfare impact of the GE innovation is...