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Predictability Tests Robust against Parameter Instability

Christis Katsouris

arXiv 27 Jul 2023 · Econometrics

arXiv:2307.15151 · PDF · DOI · OpenAlex · Extracted main text

Abstract

We consider Wald type statistics designed for joint predictability and structural break testing based on the instrumentation method of Phillips and Magdalinos (2009). We show that under the assumption of nonstationary predictors: (i) the tests based on the OLS estimators converge to a nonstandard limiting distribution which depends on the nuisance coefficient of persistence; and (ii) the tests based on the IVX estimators can filter out the persistence under certain parameter restrictions due to the supremum functional. These results contribute to the literature of joint predictability and parameter instability testing by providing analytical tractable asymptotic theory when taking into account nonstationary regressors. We compare the finite-sample size and power performance of the Wald tests under both estimators via extensive Monte Carlo experiments. Critical values are computed using standard bootstrap inference methodologies. We illustrate the usefulness of the proposed framework to test for predictability under the presence of parameter instability by examining the stock market predictability puzzle for the US equity premium.

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Most heavily cited references

The works this paper leans on most, across its whole bibliography — not restricted to papers in our corpus. Ranked by composite intensity, which combines how often a work is mentioned, how many sections mention it, and how much of that falls in the main text rather than the appendix.

ReferenceIntensityMentionsSectionsMain text
1Kasparis, I., Andreou, E., and Phillips, P. C (2015) Nonparametric predictive regression1.00064100%
2Gonzalo, J. and Pitarakis, J.-Y (2012) Regime-specific predictability in predictive regressions1.00054100%
3Phillips, P. C. and Lee, J. H (2016) Robust econometric inference with mixed integrated and mildly explosive regressors1.00053100%
4Andrews, D. W (1993) Tests for parameter instability and structural change with unknown change point0.95014786%
5Phillips, P. C. and Lee, J. H (2013) Predictive regression under various degrees of persistence and robust long-horizon regression0.92843100%
6Kostakis, A., Magdalinos, T., and Stamatogiannis, M. P (2015) Robust econometric inference for stock return predictability0.8434475%
7Georgiev, I., Harvey, D. I., Leybourne, S. J., and Taylor, A. R (2018) Testing for parameter instability in predictive regression models0.8434375%
8Hansen, B. E (2000) Testing for structural change in conditional models0.8434375%
9Phillips, P. C. and Magdalinos, T (2009) Econometric inference in the vicinity of unity0.81711555%
10Gonzalo, J. and Pitarakis, J.-Y (2017) Inferring the predictability induced by a persistent regressor in a predictive threshold model0.73732100%

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