Testing Granger non-causality in expectiles

Taoufik Bouezmarni, Mohamed Doukali and Abderrahim Taamouti

Econometric Reviews, 2024, vol. 43, issue 1, 30-51

Abstract: This article aims to derive a consistent test of Granger causality at a given expectile. We also propose a sup-Wald test for jointly testing Granger causality at all expectiles that has the correct asymptotic size and power properties. Expectiles have the advantage of capturing similar information as quantiles, but they also have the merit of being much more straightforward to use than quantiles, since they are defined as least squares analog of quantiles. Studying Granger causality in expectiles is practically simpler and allows us to examine the causality at all levels of the conditional distribution. Moreover, testing Granger causality at all expectiles provides a sufficient condition for testing Granger causality in distribution. A Monte Carlo simulation study reveals that our tests have good finite-sample size and power properties for a variety of data-generating processes and different sample sizes. Finally, we provide two empirical applications to illustrate the usefulness of the proposed tests.

Date: 2024
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Working Paper: Testing Granger Non-Causality in Expectiles (2022)
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DOI: 10.1080/07474938.2023.2246823

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