@TechReport{economics.dp.2009-15,
 author = {Anthoff, David, Tol, Richard S. J., and Yohe, Gary W.},
 title = {Discounting for Climate Change},
 type = {Economics Discussion Paper},
 institution = {Kiel Institute for the World Economy},
 year = {2009},
 number = {2009-15},
 url = {http://www.economics-ejournal.org/economics/discussionpapers/2009-15}
}