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The environment and directed technical change


Acemoglu, Daron; Aghion, Philippe; Bursztyn, Leonardo; Hémous, David (2012). The environment and directed technical change. American Economic Review, 102(1):131-166.

Abstract

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.

Abstract

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.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:03 Faculty of Economics > Department of Economics
Dewey Decimal Classification:330 Economics
Language:English
Date:February 2012
Deposited On:03 Feb 2017 13:05
Last Modified:08 Dec 2017 23:00
Publisher:American Economic Association
ISSN:0002-8282
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1257/aer.102.1.131
Related URLs:https://www.aeaweb.org/journals/aer (Publisher)

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