The Environment and Directed Technical Change: Comment
17 Pages Posted: 26 Jan 2012
Date Written: January 24, 2012
This paper discusses the growth model with environmental constraints recently presented in (Acemoglu et al., 2011) which focuses on the redirection of technical change by climate policies with research subsidies and a carbon tax. First, Acemoglu et al.'s model and chosen parameters yield numerical results that do not support the conclusion that ambitious climate policies can be conducted “without sacrificing (much or any) long-run growth”. Second, they select unrealistic key parameters for carbon sinks and elasticity of substitution. We find that more realistic parameters lead to very different results. Third, the model leads to an unrealistic conclusion when used to analyze endogenous growth, suggesting specification problems.
Keywords: Technological Change, Endogenous Growth, Climate, Energy Substitutability
JEL Classification: O30, O33, Q43, Q54, Q56
Suggested Citation: Suggested Citation