' effects on chemical innovation in the U.S. we compare changes in patenting by U.S. inventors in research fields of émigrés ….S. invention. Inventor-level data indicate that émigrés encouraged innovation by attracting new researchers to their fields, rather …

's fairs between 1851 and 1915. Exhibition data show that the industry where an innovation is made is the single most important …

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 …

of innovation and imitation, we explore how inventive capability affects a firm's R&D investments, and thus whether and … innovation and the division of innovative labor among US manufacturing firms, we find that high capability firms tend to use …

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 …