Null Hypothesis: D(VALUE) has a unit root
Exogenous: Constant
Lag Length: 1 (Automatic based on SIC, MAXLAG=10)
t-Statistic Prob.*
Augmented Dickey-Fuller test statistic -8.019538 0.0000
Test critical values: 1% level -3.458347
5% level -2.873755
10% level -2.573355
*MacKinnon (1996) one-sided p-values.
Augmented Dickey-Fuller Test Equation
Dependent Variable: D(VALUE,2)
Method: Least Squares
Date: 03/14/18 Time: 16:22
Sample (adjusted): 2/08/2017 12/29/2017
Included observations: 233 after adjustments
Coefficient Std. Error t-Statistic Prob.
D(VALUE(-1)) -0.675962 0.084289 -8.019538 0.0000
D(VALUE(-1),2) -0.195571 0.066890 -2.923767 0.0038
C 0.006025 0.006483 0.929390 0.3537
R-squared 0.430751 Mean dependent var -0.001202
Adjusted R-squared 0.425801 S.D. dependent var 0.129467
S.E. of regression 0.098105 Akaike info criterion -1.792774
Sum squared resid 2.213635 Schwarz criterion -1.748340
Log likelihood 211.8582 Hannan-Quinn criter. -1.774857
F-statistic 87.02065 Durbin-Watson stat 1.935058
Prob(F-statistic) 0.000000
ADF我一阶差分后,是不是就拒绝了原假设,是可以的了
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