6WTO. Annex on financial services:general agreement on trade in services [ EB/OL ]. E 2012 -06 -03']. http://www. wto. org/english/tratop_e/serv_e/gatsintr_e, htm.
7Cui Y J, Shen F Y. Relationship of international trade in financial services and economic growth:the case of China [J]. Asian Social Science,2011,7(9) :220 - 225.
9Dickey D A, Fuller W A. Likelihood ratio statistics for autoregressive time series with a unit root [J]. Econo- metrics, 1981,49 (6) : 1057 - 1072.
10Johansen S, Juselius K. Maximum likelihood estima- tion and inference on cointegration with applications to the demand for money[J]. Oxford Bulletin of Eco- nomics and Statistic s, 1990,52 ( 2 ) : 169 - 210.
