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IFS Uncertainty in the forecasts Carl Emmerson. © Institute for Fiscal Studies, 2004 Previous HMT forecasting errors Source: HM Treasury (2003)

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Presentation on theme: "IFS Uncertainty in the forecasts Carl Emmerson. © Institute for Fiscal Studies, 2004 Previous HMT forecasting errors Source: HM Treasury (2003)"— Presentation transcript:

1 IFS Uncertainty in the forecasts Carl Emmerson

2 © Institute for Fiscal Studies, 2004 Previous HMT forecasting errors Source: HM Treasury (2003)

3 © Institute for Fiscal Studies, 2004 Previous HMT forecasting errors Source: HM Treasury (2003)

4 © Institute for Fiscal Studies, 2004 Errors in borrowing forecasts 1 year ahead 2 years ahead 3 years ahead 4 years ahead Average error0.05 –0.58–1.10 Source: HM Treasury (2003); Emmerson, Frayne and Love (2004) % of GDP

5 © Institute for Fiscal Studies, 2004 Errors in borrowing forecasts 1 year ahead 2 years ahead 3 years ahead 4 years ahead Average error0.05 –0.58–1.10 Average absolute error Standard deviation of errors Source: HM Treasury (2003); Emmerson, Frayne and Love (2004) % of GDP

6 © Institute for Fiscal Studies, 2004 Uncertainty over path of PSNB Forecast errors are normally distributed Average error is zero –But forecasts are based on cautious assumptions Accuracy is the same as past –This will understate true forecasting errors as previous errors not adjusted for subsequent policy changes

7 © Institute for Fiscal Studies, 2004 Uncertainty over path of PSNB Source: IFS calculations

8 © Institute for Fiscal Studies, 2004 Uncertainty over path of PSNB Source: IFS calculations

9 © Institute for Fiscal Studies, 2004 Uncertainty over path of PSNB Source: IFS calculations

10 © Institute for Fiscal Studies, 2004 Uncertainty over path of PSNB Source: IFS calculations

11 © Institute for Fiscal Studies, 2004 Uncertainty over path of PSNB Source: IFS calculations

12 © Institute for Fiscal Studies, 2004 Uncertainty over path of CBS Forecast errors are normally distributed Average error is zero –But forecasts are based on cautious assumptions Accuracy is the same as past –This will understate true forecasting errors as previous errors not adjusted for subsequent policy changes Assume similar errors in forecasting current budget surplus and net borrowing Account for correlation in errors from all forecasts made at the same time

13 © Institute for Fiscal Studies, 2004 Will the golden rule be met? Source: Emmerson, Frayne and Love (2004)

14 © Institute for Fiscal Studies, 2004 Will the golden rule be met? Source: Emmerson, Frayne and Love (2004)

15 © Institute for Fiscal Studies, 2004 Will the golden rule be met? Source: Emmerson, Frayne and Love (2004)

16 © Institute for Fiscal Studies, 2004 Will the golden rule be met? Source: Emmerson, Frayne and Love (2004)

17 © Institute for Fiscal Studies, 2004 Will the golden rule be met? Source: Emmerson, Frayne and Love (2004)

18 © Institute for Fiscal Studies, 2004 Will the golden rule be met? Source: IFS Calculations

19 © Institute for Fiscal Studies, 2004 Conclusions Over the current economic cycle: –Treasury forecast for Golden rule to be met –At best a 62% chance of success –Relies on stronger growth in receipts and slower growth in spending Looking forwards –Treasury forecast for Golden rule to be met –Relies on strong growth in tax receipts –Not expected to be met under cautious case


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