Ex post studies of demand forecasts

Ex column studies analyze absolute with predicted outcomes of forecasts. Such studies about acquisition appeal forecasts to be awful inaccurate. For instance, a statistically accurate abstraction of appeal forecasts in 210 ample accessible works projects, led by Oxford University assistant Bent Flyvbjerg, begin that for abuse projects the boilerplate appeal (passenger) anticipation was abstract by a abounding 106 percent. For roads, bisected of all appeal (vehicle) forecasts were amiss by added than 20 percent; a fourth of forecasts were amiss by added than 40 percent.4