We study the effects of an institution that pools patents across geographical markets on the licensing and adoption of life-saving drugs in low- and middle-income countries. Using data on licensing and sales for HIV, hepatitis C and tuberculosis drugs, we show that there is an immediate and...

We study the causal impact of patent invalidation on subsequent innovation and exit by the patent holder. The analysis is based on patent litigation at the U.S. Court of Appeals for the Federal Circuit, and exploits the random allocation of judges to control for endogeneity of the judicial...

Cumulative innovation is central to economic growth. Do patent rights facilitate or impede follow-on innovation? We study the causal effect of removing patent rights by court invalidation on subsequent research related to the focal patent, as measured by later citations. We exploit random...

We study the effects of an institution that pools patents across geographical markets on the licensing and adoption of life-saving drugs in low- and middle-income countries. Using data on licensing and sales for HIV, hepatitis C and tuberculosis drugs, we show that there is an immediate and...