随机模拟了有限样本情况下具有TARCH-Skew-t误差项时间序列的ADF单位根检验.在数据生成过程为AR(1)-TARCH-Skew-t时,分析了样本容量、条件分布中参数的变化和反映信息非对称性参数的变动对临界值的影响.结果显示,只能直接使用z统计量的Fuller临界值表.
In this paper, the authors simulated the ADF unit root test of finite-sample time series with TARCH-Skew-t error. The sample size, changing related parameters in conditional distribution and parameter which reflects information asymmetricity in conditional variance were analyzed, which shows that the Fuller critical values of z, statistics can only be used directly if the conditional distribution follows skew-t distribution.