The hedge value of international emissions trading under uncertainty

Mort Webster, Sergey Paltsev, John Reilly

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


This paper estimates the value of international emissions trading, focusing on a here-to-fore neglected component; its value as a hedge against uncertainty. Much analysis has been done of the Kyoto Protocol and other potential international greenhouse gas mitigation policies comparing the costs of achieving emission targets with and without trading. These studies often show large cost reductions for all Parties under trading compared to a no trading case. We investigate the welfare gains of including emissions trading in the presence of uncertainty in economic growth rates, using both a partial equilibrium model based on marginal abatement cost curves and a computable general equilibrium model. We find that the hedge value of international trading is small relative to its value in reallocating emissions reductions when the burden sharing scheme does not resemble a least cost allocation. We also find that the effects of pre-existing tax distortions and terms of trade dominate the hedge value of trading. We conclude that the primary value of emissions trading in international agreements is as a burden sharing or wealth transfer mechanism and should be judged accordingly.

Original languageEnglish (US)
Pages (from-to)1787-1796
Number of pages10
JournalEnergy Policy
Issue number4
StatePublished - Apr 2010

All Science Journal Classification (ASJC) codes

  • Energy(all)
  • Management, Monitoring, Policy and Law


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