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Journal of Economic Theory and Econometrics
Journal of the Korean Econometric Society
Tests of the Null of Cointegration Using Integrated and Modified OLS Residuals
Vol.35, No.4, December 2024, 55–86
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Cheol-Keun Cho
(University of Ulsan)
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Abstract
This study develops a KPSS (Kwiatkowski et al., 1992)-type cointegration test utilizing residuals from integrated and modified ordinary least squares (IMOLS) estimation. The test statistic, denoted by $KPSS^{Fb}$ has a pivotal null limit distribution under fixed-$b$ assumption. The proposed test demonstrates reasonable performance in terms of size and power when the Andrews' AR(1) plug-in data-dependent ($DD$) bandwidth is employed and fixed-$b$ critical values are used. Additionally, two modified IMOLS residuals are proposed to obtain alternative data-dependent bandwidths. In the simulation experiment, these bandwidths deliver improved power properties for the proposed test.
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Keywords
Data-dependent bandwidth, cointegration, fixed-$b$, IMOLS, KPSS. |
JEL classification codes
C12, C22. |
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