innovation. We exploit the observed pattern of contributions - the 'revealed preference' of developers - to infer the underlying …

We model early expectations about the value and technological importance ('quality') of a patented innovation as a …

We study the causal impact of patent invalidation on subsequent innovation and exit by the patent holder. The analysis …

Cumulative innovation is central to economic growth. Do patent rights facilitate or impede follow-on innovation? We …. Patent rights block downstream innovation in computers, electronics and medical instruments, but not in drugs, chemicals or … triggers more follow-on innovation by small firms …

We study how the market for innovation affects enforcement of patent rights. Conventional wisdom associates the gains … potential gains from trade are more likely to change ownership, suggesting that the market for innovation is efficient. We also …

Cumulative innovation is central to economic growth. Do patent rights facilitate or impede such follow-on innovation …. Patent rights appear to block follow-on innovation only in the technology fields of computers, electronics and medical … small innovators, suggesting that patents may impede the ‘democratization’ of innovation. …