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http://dx.doi.org/10.5351/KJAS.2011.24.1.035

A Unit Root Test via a Discrete Cosine Transform  

Lee, Go-Un (Department of Statistics, Sookmyoung Women's University)
Yeo, In-Kwon (Department of Statistics, Sookmyoung Women's University)
Publication Information
The Korean Journal of Applied Statistics / v.24, no.1, 2011 , pp. 35-43 More about this Journal
Abstract
In this paper, we introduce a unit root test via discrete cosine transform in the AR(1) process. We first investigate the statistical properties of DCT coefficients under the stationary AR(1) process and the random walk process in order to verify the validity of the proposed method. A bootstrapping approach is proposed to induce the distribution of the test statistic under the unit root. We performed simulation studies for comparing the powers of the Dickey-Fuller test and the proposed test.
Keywords
Dickey-Fuller test; parametric bootstrap; random walk;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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