Under the Kyoto Protocol, industrialized countries committed to emission reductions may fufffil part of their obligations by implementing emission reduction projects in developing countries. In doing so, they make use of the so-called Clean Development Mechanism (CDM). Two important issues surround the implementation of the CDM. First, if the cheapest abatement measures are implemented for CDM projects, developing countries may be left with only more expensive measures when they have to meet their own commitments in the future (the so-called low-hanging fruits issue). Second, a choice must be made on the type of baseline against which emission reductions are measured: an absolute baseline or a relative (to output) one (the baseline issue). ...