Group unit root test: Summary
Series: SER01
Date: 04/28/13 Time: 01:03
Sample: 1999 2012
Exogenous variables: Individual effects, individual linear trends
Automatic selection of maximum lags
Automatic lag length selection based on SIC: 0
and Bartlett kernel
Balanced observations for each test
Cross-
Method Statistic Prob.** sections Obs
Null: Unit root (assumes common unit root process)
Levin, Lin & Chu t* -1.59677 0.0552 1 13
Breitung t-stat -0.50598 0.3064 1 12
Null: Unit root (assumes individual unit root process)
Im, Pesaran and Shin W-stat -0.09120 0.4637 1 13
ADF - Fisher Chi-square 1.71104 0.4251 1 13
PP - Fisher Chi-square 1.53984 0.4631 1 13
** Probabilities for Fisher tests are computed using an asymptotic Chi
-square distribution. All other tests assume asymptotic normality.
用的Eviews6.0做的结果,和3.1差好多。。。我只需要一列数据来做差分方程,现在单位根检验的结果如上,租体字是说滞后期为0吗?那方程可以做成Y(t)=a0+a1Y(t-1)这个类型的吗?还需不需要做协整检验?


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