there is no perfectly clean technology that eventually solves the pollution problem once and for all. New technologies have … stings attached, i.e. each emits a specific stock pollutant. Damages are convex in individual pollution stocks but additive … across stocks, creating gains from diversification. The research and pollution policies are tightly linked in such a setting …

the new technology may turn out to generate a new pollution problem. R&D may therefore be optimally undertaken more than … once. Using and externding recent results from multi-stage optimal control theory, we provide a full characterization of … the optimal pollution and R&D policies. The optimal R&D program is strictly sequential and has an endogenous stopping …

The impact of environmental innovation on the marginal pollution abatement cost at the firm level is investigated. We … friendly technology may lead to more pollution and less profit at the firm level …

developing firm's pollution in a nine-year window after patent filing dates. The environmental benefit of these technologies … positively correlates with their relevance to previous green innovations, and increases with the firm's pollution tendencies and …

. To address endogeneity concern, we calculate city-level fair pollution reduction mandates according to each city …’s contribution to national pollution emissions and use them as instrumental variables of planned ones. Our empirical results reveal … that while air pollution regulation (APR) has some but limited innovation-motivating effects, water pollution regulation …

Production often causes pollution as a by-product. Once pollution problems become too severe, regulation is introduced … claim that the rise and decline of pollution can be explained by policy-induced technology shifts …