Armstrong, J. Scott; Green, Kesten C.; Soon, Willie - Volkswirtschaftliche Fakultät, … - 2007
The extinction of polar bears by the end of the 21st century has been predicted and calls have been made to list them as a threatened species under the U.S. Endangered Species Act. The decision on whether or not to list rests upon forecasts of what will happen to the bears over the 21st Century....