1F. Carrieri, V. Errunza, and K. Hogan, Characteri- zing World Market Integration through Time [ J ]. Journal of Financial and Quantitative Analysis, 2007,42 ( 4 ) : 915 -940.
2J. Davidson, Moment and Memory Properties of Llinear Conditional Heteroscedasticity Models, and a New Mod- el [ J ], Journal of Business and Economics Statistics, 2004,22(1) :16 -29.
3R. Engle, Dynamic Conditional Correlation - a Simple Class of Muhivariate GARCH Models[J]. Journal of Busi- ness and Economic Statistics ,2002,20(3) :339 - 350.
4R. F. Engle, and B. Kelly, Dynamic Equicorrelation [J]. Joumal of Business & Economic Statistics,2012, 30(2) :212 -228.
5H. Lehkonen, and K. HEIMONEN, Timescale - de- pendent Stock Market Comovement: BRICs vs. Devel- oped Markets[ J]. Journal of Empirical Finance, 2014, 28:90 - 103.