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Polar Bear Population Forecasts: A Public-Policy Forecasting Audit, J. Scott Armstrong, Kesten C. Green, Willie Soon
Polar Bear Population Forecasts: A Public-Policy Forecasting Audit, J. Scott Armstrong, Kesten C. Green, Willie Soon
J. Scott Armstrong
Calls to list polar bears as a threatened species under the United States Endangered Species Act are based on forecasts of substantial long-term declines in their population. Nine government reports were written to help U.S. Fish and Wildlife Service managers decide whether or not to list polar bears as a threatened species. We assessed these reports based on evidence-based (scientific) forecasting principles. None of the reports referred to sources of scientific forecasting methodology. Of the nine, Amstrup, Marcot, and Douglas (2007) and Hunter et al. (2007) were the most relevant to the listing decision, and we devoted our attention to …