具有下图趋势的数据,用Eviews做ADF检验,选择无截距项无时间趋势,结果竟然平稳,原因何在? Exogenous:Nonex05x05x05x05 Lag Length:1 (Automatic based on SIC,MAXLAG=1)x05x05x05 x05x05 Prob.*x05 Augmented Dickey-Fuller test statisticx05-2.276924x050.0257 Test critical values:x051% levelx05x05-2.699769x05 x05 5% levelx05x05-1.961409x05 x05 10% levelx05x05-1.606610