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Testing for equal predictive accuracy with strong dependence

Author

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  • Laura Coroneo
  • Fabrizio Iacone

Abstract

We analyse the properties of the Diebold and Mariano (1995) test in the presence of autocorrelation in the loss differential. We show that the power of the Diebold and Mariano (1995) test decreases as the dependence increases, making it more difficult to obtain statistically significant evidence of superior predictive ability against less accurate benchmarks. We also find that, after a certain threshold, the test has no power and the correct null hypothesis is spuriously rejected. Taken together, these results caution to seriously consider the dependence properties of the loss differential before the application of the Diebold and Mariano (1995) test.

Suggested Citation

  • Laura Coroneo & Fabrizio Iacone, 2024. "Testing for equal predictive accuracy with strong dependence," Papers 2409.12662, arXiv.org.
    • Handle: RePEc:arx:papers:2409.12662
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    1. is not listed on IDEAS
    2. Nikolaos T. Giannakopoulos & Damianos P. Sakas & Kanellos Toudas & Panagiotis Karountzos, 2025. "Implication of Digital Marketing in the Supply Chain Finance of the Beverage Industry," IJFS, MDPI, vol. 13(4), pages 1-23, October.
    3. Coroneo, Laura & Iacone, Fabrizio & Profumo, Fabio, 2024. "Survey density forecast comparison in small samples," International Journal of Forecasting, Elsevier, vol. 40(4), pages 1486-1504.

    More about this item

    JEL classification:

    • C12 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Hypothesis Testing: General
    • C32 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes; State Space Models
    • C53 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Forecasting and Prediction Models; Simulation Methods

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