Recent work highlights a falling entry rate of new firms and a rising market share of large firms in the United States …

We build a model of firm-level innovation, productivity growth and reallocation featuring endogenous entry and exit. A …. The model provides a good fit to the dynamics of firm entry and exit, output and R&D. Taxing the continued operation of …

"cutthroat capitalism" that generates greater inequality and more innovation and will become the technology leaders, while others …

frontier? This paper models agents growing as a result of investments in innovation and imitation. Imitation facilitates …

a model of endogenous growth with frictions. Productivity increases with knowledge, which advances via innovation, and … innovation. First, intermediation allows us to finance more transactions with fewer assets. Second, it ameliorates certain …, suggesting that technology transfer is a significant source of innovation and showing how it is affected by credit considerations …

-run growth by increasing the profit from innovation. In the short run, factors of production must be reallocated inside firms …, which lowers the opportunity cost of innovation, generating an additional trapped factor effect. Starting from a baseline …

outcome. The totality of possible outcomes drives the national innovation system and the returns to a particular successful … required to motivate investment attempting to turn them into an innovation. The alternative to a valuable proprietary … innovation is not the same innovation freely available but the unchanged generic technology. Growth is concentrated in any …

innovation. Agents accumulate knowledge through two activities: innovation (discovering new technologies) and exploitation …

We show a causal impact of immigration on innovation and growth in US counties. To identify the causal impact of … county in recent decades. We show immigration has a positive causal impact on innovation, measured as patenting of local … identified causal impact of migration on innovation suggests the large inflow of foreign migrants into the US since 1965 may have …