Professor Scott Armstrong is at the Wharton School at the University of Pennsylvania. Dr Kesten Green is with the Business and Economic Forecasting Unit at Monash University. They're experts in forecasting techniques...
Armstrong and Green looked at the Intergovernmental Panel on Climate Change's Working Group 1 report from earlier this year. This is the major source for the orthodoxy.
...Armstrong and Green rated the methodology used by the panel against 89 principles of good forecasting derived from years of research. They found that the panel report breached 72 of those principles.
...Armstrong has just offered Al Gore a $US20,000 ($23,000) bet that the Intergovernmental Panel on Climate Change temperature forecasts are wrong.