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To estimate the emissions reductions and costs of a climate policy, analysts usually compare a policy scenario with a baseline scenario of future economic conditions without the policy. Both scenarios require assumptions about the future course of numerous factors such as population growth, technical change, and non-climate policies like taxes. The results are only reliable to the extent that the future turns out to be reasonably close to the assumptions that went into the model.
About the authors
Warwick McKibbin
Professor Warwick McKibbin was a Professorial Fellow at the Lowy Institute for International Policy until October 2012.
Topics
In this Working Paper the authors examine the effects of unanticipated macroeconomic shocks to growth in developing countries or a global financial crisis on the performance of three climate policy regimes: a globally-harmonised carbon tax; a global cap and trade system; and the McKibbin-Wilcoxen hybrid.
