We characterize the contribution of immigrants to US innovation, both through their direct productivity as well as … Number is assigned. We find immigrants represent 16 percent of all US inventors, but produced 23 percent of total innovation … premature inventor deaths, we find that immigrant inventors create especially strong positive externalities on the innovation …

disaggregates "R" from "D" to study how US firms adjust their innovation investments in response to an external increase in funding …

We model a key step in the innovation process, hypothesis generation, as the making of predictions over a vast …, they use artificial intelligence (AI) instead. We model innovation as resulting from sequential search over a combinatorial … innovation outcomes of interest - the probability of innovation, expected search duration, and expected profit. We describe …

externalities but also by innovation market failures. This paper maps the economics literature on innovation market failures and …

Empirical studies have found that enhanced foreign competition can encourage or discourage innovation. To address this …-product firms live forever, and the large firms invest in innovation in order to enlarge their product spans. All firms export. I … show that an increase in the competitiveness of foreign firms can increase or reduce innovation efforts of a large multi …

reduces carbon emissions by inducing substitution away from coal. Yet, the natural gas boom discourages innovation directed at …