How do non-practicing entities ("Patent Trolls") impact innovation and technological progress? Although this question …", who exploit the patent system to extract rents and thereby hurt innovation. We employ unprecedented access to NPE … also find that downstream innovation drops in fields where patents have been acquired by NPEs. Finally, our numerical …

An inventor's own knowledge is a key input in the innovation process. This knowledge can be built by interacting with … of our new innovation-led endogenous growth model, in which innovations are produced by heterogeneous research teams of … model nests inside the innovation-based endogenous growth model. We estimate the model, which fits the data very closely …

We examine the golden age of U.S. innovation by undertaking a major data collection exercise linking historical U … macro and micro-level determinants. We find a positive relationship between innovation and drivers of regional performance … delayed marriage, and tended to migrate to places that were conducive to innovation. Father's income was positively correlated …

entrant or incumbent firm. If the inventor works for the entrant the innovation is implemented and the entrant displaces the …