This thesis consists of four papers. The first two papers deal with the valuation of an endangered species, the African elephant. The third paper is on the assessment of attribute values for work trips. The fourth paper models the number of alternative travel modes for work trips. <p> Paper [I]...</p>

Under the Kyoto Protocol the European Union (EU) agreed to reduce the emissions of greenhouse gases by 8 percent in comparison with the level in 1990. The Burden-Sharing Agreement (BSA) further redistributes the overall 8 percent reduction target among the EU Member States. The purpose of this...