是用 statistic这个数据么 判断的标准是咋样的。。
. vecrank a b
Johansen tests for cointegration
Trend: constant Number of obs = 155
Sample: 1960m4 - 1973m2 Lags = 2
-------------------------------------------------------------------------------
5%
maximum trace critical
rank parms LL eigenvalue statistic value
0 6 1108.9907 . 4.7741* 15.41
1 9 1111.1521 0.02750 0.4513 3.76
2 10 1111.3777 0.00291