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Re-examining Symmetry of Shocks for East Asia: Results Using a VAR with Sign Restrictions

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  • Vu Tuan Khai
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    Abstract

    I revisit the hotly debated topic regarding the possibility of introducing a common currency for East Asia from the point of view of shock symmetry. I first point out a serious problem of the existing studies which use the VAR method with long-run restrictions developed by Blanchard and Quah (1989) in that the signs of the impulse response functions to the same structural shock are not necessarily consistent across the countries. This means that the high (low) correlations of structural shocks do not necessarily imply low (high) costs of a common currency area. To overcome this problem, I apply the VAR method with sign restrictions developed by Uhlig (2005). I used the AD-AS model to impose sign restrictions on the responses of GDP and CPI to demand and supply shocks. One main finding is that demand shocks are significantly positively correlated among almost all East Asian countries. But overall, East Asia as a whole is not suitable for a common currency because correlations of supply shocks are low.

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    File URL: http://gcoe.ier.hit-u.ac.jp/research/discussion/2008/pdf/gd08-042.pdf
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    Paper provided by Institute of Economic Research, Hitotsubashi University in its series Global COE Hi-Stat Discussion Paper Series with number gd08-042.

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    Date of creation: Mar 2009
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    Handle: RePEc:hst:ghsdps:gd08-042

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    Keywords: Structural VAR; Long run restriction; Sign restriction; Symmetry of Shocks; Common Currency; East Asia;

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    1. Dedola, Luca & Neri, Stefano, 2004. "What Does A Technology Shock Do? A VAR Analysis with Model-based Sign Restrictions," CEPR Discussion Papers 4537, C.E.P.R. Discussion Papers.
    2. Peersman, Gert & Straub, Roland, 2004. "Technology shocks and robust sign restrictions in a euro area SVAR," Working Paper Series 0373, European Central Bank.
    3. Cohen, Daniel & Wyplosz, Charles, 1989. "The European Monetary Union: An Agnostic Evaluation," CEPR Discussion Papers 306, C.E.P.R. Discussion Papers.
    4. Kim, David, 2007. "An East Asian currency union?: The empirical nature of macroeconomic shocks in East Asia," Journal of Asian Economics, Elsevier, vol. 18(6), pages 847-866, December.
    5. Zhaoyong Zhang & Kiyotaka Sato & Michael McAleer, 2004. "Is a monetary union feasible for East Asia?," Applied Economics, Taylor & Francis Journals, vol. 36(10), pages 1031-1043.
    6. Zhaoyong Zhang & Kiyotaka Sato, 2008. "Whither A Currency Union in Greater China?," Open Economies Review, Springer, vol. 19(3), pages 355-370, July.
    7. Kiyotaka Sato & Zhaoyong Zhang, 2006. "Real Output Co-movements in East Asia: Any Evidence for a Monetary Union?," The World Economy, Wiley Blackwell, vol. 29(12), pages 1671-1689, December.
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