In this paper, we study the determinants of patent quality and volume of patent applications when inventors care about perceived patent quality. We analyze the effects of various policy reforms, specifically, a proposal to establish a two-tiered patent system. In the two-tiered system,...

Patent reexamination or patent review systems can lower the cost of challenging patent validity and help improve patent quality. We empirically investigate post-grant patent validity challenges at the U.S. Patent and Trademark Office, and how the 2011 America Invents Act affected them. We...