环境与定向技术变革
The Environment and Directed Technical Change.
作者信息
Acemoglu Daron, Aghion Philippe, Bursztyn Leonardo, Hemous David
机构信息
Massachusetts Institute of Technology, Department of Economics, 50 Memorial Drive, Cambridge MA 02142-1347 and Canadian Institute for Advanced Research.
Harvard University, Department of Economics, Littauer Center, 1805 Cambridge Street, Cambridge, MA 02138; Stockholm University (IIES); and Canadian Institute for Advanced Research.
出版信息
Am Econ Rev. 2012 Feb;102(1):131-166. doi: 10.1257/aer.102.1.131.
This paper introduces endogenous and directed technical change in a growth model with environmental constraints. The final good is produced from "dirty" and "clean" inputs. We show that: (i) when inputs are sufficiently substitutable, sustainable growth can be achieved with temporary taxes/subsidies that redirect innovation toward clean inputs; (ii) optimal policy involves both "carbon taxes" and research subsidies, avoiding excessive use of carbon taxes; (iii) delay in intervention is costly, as it later necessitates a longer transition phase with slow growth; and (iv) use of an exhaustible resource in dirty input production helps the switch to clean innovation under laissez-faire. (JEL O33, O44, Q30, Q54, Q56, Q58).
本文在一个存在环境约束的增长模型中引入了内生性和定向技术变革。最终产品由“脏”投入品和“清洁”投入品生产而成。我们证明：（i）当投入品具有足够的替代性时，通过临时税收/补贴将创新导向清洁投入品，可持续增长是可以实现的；（ii）最优政策既包括“碳税”又包括研究补贴，避免过度使用碳税；（iii）干预延迟是有成本的，因为这随后需要一个更长的增长缓慢的转型阶段；（iv）在脏投入品生产中使用不可再生资源有助于在自由放任的情况下转向清洁创新。（《经济文献杂志》分类号：O33、O44、Q30、Q54、Q56、Q58）
Zotero 插件