Munich Personal RePEc Archive

Forecasting with Econometric Methods: Folklore Versus Fact

Armstrong, J. Scott (1978): Forecasting with Econometric Methods: Folklore Versus Fact. Published in: Journal of Business No. 51 (1978): pp. 549-564.

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Evidence from social psychology suggests that econometricians will avoid evidence that disconfirms their beliefs. Two beliefs of econometricians were examined: (1) Econometric methods provide more accurate short-term forecasts than do other methods; and (2) more complex econometric methods yield more accurate forecasts. A survey of 21 experts in econometrics found that 95% agreed with the first statement and 72% agreed with the second. A review of the published empirical evidence yielded little support for either of the two statements in the 41 studies. The method of multiple hypotheses was suggested as a research strategy that will lead to more effective use of disconfirming evidence. Although this strategy was suggested in 1890, it has only recently been used by econometricians.

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