The behavior of external debt in Asian countries: evidence based on panel unit root tests by Lau, Evan, Baharumshah, Ahmad Zubaidi, Soon, Siew Voon

“…Two major findings are noteworthy; first majority debt ratios in the Asian countries are affected by structural breaks. Second, we find unit root tests that do not accommodate breaks are less likely to detect mean reversion in the debt ratios. …”
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The real interest rate differential : international evidence based on non-linear unit root tests. by Baharumshah, Ahmad Zubaidi, Liew, Venus Khim-Sen, Chan, Tze Haw

“…This paper aims at testing international parity conditions by using non-linear unit root tests advocated by Kapetanios et al. (2003, KSS). …”
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...Evidence using panel unit root and panel cointegration ... by Mohamed, Azali, Habibullah, Muzafar Shah, Baharumshah, Ahmad Zubaidi

“…This paper presents an empirical analysis of panel unit root and panel cointegration tests of long-run absolute purchasing power parity (PPP) for seven Asian developing economies (ADE). …”
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Currency crises and purchasing power parity in the asian countries: evidence based on second-generation panel unit-root tests by Siew, Voon Soon, Baharumshah, Ahmad Zubaidi, Md. Shariff, Nurul Sima, Ibrahim, Saifuzzaman

“…This study applies a second-generation panel unit-root tests to determine the stochastic properties of real exchange rates for 14 Asian countries. …”
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Assessing the mean reversion behaviour of fiscal policy: the perspective of Asian countries by Lau, Evan, Baharumshah, Ahmad Zubaidi

“…This article investigates fiscal policy sustainability in 10 Asian countries by adopting a battery of unit root tests. Univariate unit root tests reveal that the fiscal stance in these countries follows a nonstationary process while the opposite conclusion was drawn for the same dataset using the commonly employed panel unit root techniques. …”
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Efficiency market hypothesis in an emerging market: does it really hold for Malaysia? by Soon, Siew-Voon, Baharumshah, Ahmad Zubaidi, Chan, Tze-Haw

“…Based on Liu and Narayan’s (2011) GARCH-based unit-root with structural breaks test, the unit-root null is rejected for all except one sector. …”

Purchasing power parity in African countries: evidence from panel SURADF test by Baharumshah, Ahmad Zubaidi, Lau, Evan, Nziramasanga, Mudziviri T.

“…This study reexamines the validity of long-run purchasing power parity (PPP) hypothesis using a battery of panel unit root tests for 11 developing countries in Africa over the period 1980-2007. …”
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Real interest rate parity in the ASEAN-5 countries : a nonlinear perspective. by Baharumshah, Ahmad Zubaidi, Liew, Venus Khim Sen, Hamzah, Nor Aishah

“…This article aims at testing real interest parity (RIP) by using nonlinear unit root tests. The results from Kapetanios et al. (2003) demonstrated that the adjustment of ASEAN-5 real interest rates towards real interest rates in Japan and the US follows a nonlinear (stationary) process. …”
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Are Asian real exchange rates stationary? by Liew, Venus Khim Sen, Baharumshah, Ahmad Zubaidi, Chong, Terence Tai Leung

“…[Journal of Econometrics 112 (2003) 359] in examining the stationary property of 11 Asian real exchange rates, this paper rejects unit root in 8 US dollar-based and 6 Japanese yen-based rates, whereas the augmented Dickey–Fuller (ADF) test has led to no rejection at all.…”
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Asymmetry dynamics in real exchange rates: new results on East Asian currencies by Baharumshah, Ahmad Zubaidi, Liew, Venus Khim Sen, Chowdhury, Ibrahim

“…This paper provides new evidence on the purchasing power parity (PPP) hypothesis in six East Asian countries. Based on nonlinear unit root tests, we discovered that the results are broadly consistent with the fact that real exchange rates (RERs) follow a nonlinear mean reversion process. …”
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Non-linearities in real interest rate parity : evidence from OECD and Asian developing economies. by Baharumshah, Ahmad Zubaidi, Liew, Venus Khim Sen, Mittelhammer, Ron C.

“…The distinction of this paper is that we exploit both linearity and non-linear unit root tests as advocated by Dufre´not et al. (Applied Economics, 38,pp. 203-229, 2006) to validate the parity. …”
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Mean reversion of the fiscal conduct in 24 developing countries. by Baharumshah, Ahmad Zubaidi, Lau, Evan

“…Using annual data over the period 1970–2003 and the series-specific panel unit root test developed by Breuer et al. (Oxford Bulletin of Economics and Statistics, Vol. 64 (2002), pp. 527–546), we found the budget process for most developing countries fails to satisfy the strong-form sustainability condition. …”
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Parity reversion in real interest rate in the Asian countries: further evidence based on local-persistent model by Baharumshah, Ahmad Zubaidi, Soon, Siew Voon, Hamzah, Nor Aishah

“…The evidence based on two-break unit root tests reveals that majority of the real interest rate differentials (RIDs) with respect to Germany and the US are stationary, but this appears not to be the case for the Japan-based RIDs. …”
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A panel study on real interest rate parity in East Asian countries: pre- and post-liberalization era by Baharumshah, Ahmad Zubaidi, Chan, Tze Haw, Fountas, Stilianos

“…Second, the evidence based on panel unit root tests demonstrates that real interest rate differentials exhibit mean reverting behavior and are characterized by long-memory dynamics. …”
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On the sustainability of current account deficits: evidence from four ASEAN countries by Baharumshah, Ahmad Zubaidi, Lau, Evan, Fountas, Stilianos

“…The analysis is based on various unit root and cointegration procedures including those allowing for a structural break to deal with the major shortcomings of previous studies. …”
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