We analyze recent contributions to growth theory based on the model of expanding variety of Romer [Romer, P. (1990 … such applications, a key role is played by complementarities in the process of innovation. …

engage in less green R&D investment, patent applications, and research staff. Industries that are heavy emitters and those …Government subsidies are often used to stimulate environment-friendly investment. We find that Chinese firms reduce … green investment as the uncertainty of subsidies rises. This effect is identified from weather-driven fluctuations in air …

equilibrium feedback accounts for the observed comovement between investment and innovation, provides a powerful propagation …We analyze the role of endogenous capital-embodied innovation in macroeconomic dynamics. We first leverage a newly …-goods producers drops during recessions. We then develop a model of lumpy investment with heterogeneous firms and endogenous …

transformed the American innovation landscape, deepening the division of innovative labor between universities, startups, and …

segment and innovation choices, with implications for understanding the dynamics of technological change in R …