The Clean Development Mechanism (CDM) is an offset mechanism designed to reduce the overall cost of implementing a given target for greenhouse gas (GHG) emissions in industrialized Annex B countries of the Kyoto Protocol, by shifting some of the emission reductions to Non-Annex B countries. This paper analyzes how CDM projects may lead to leakage of emissions elsewhere in NonAnnex B countries. Leakage occurs because emissions reductions under a CDM project may affect market equilibrium in regional and/or global energy andprod-uct markets, and thereby increase emissions elsewhere. We also account for potential reverse or negative leakage effects in Non-Annex B from higher emissions cap in Annex B. Our conclusion is that net leakage typically is positive and sizeable, thus leading to an overall increase in global GHG emissions when CDM projects are undertaken. Leakage is greater when the different fossil fuel markets are more segregated. doi: 10.5547/ISSN0195-6574-EJ-Vol32-No4-2
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