ENGLEWOOD, Colo.--(BUSINESS WIRE)--The long-term potential growth rate for advanced economies will decelerate to an average of 1.8 percent, down from average potential growth of 2.5 percent during 1990–2007, according to an analysis utilizing the Global Link Model from IHS Inc. (NYSE: IHS), the leading global source of critical information and insight. Although actual real gross domestic product (GDP) growth will fluctuate over business cycles and may well exceed 2.5 percent, or even 3.0 percen