如图所示:Dependent Variable: DLR1 Method: ARMA Maximum Likelihood (OPG - BHHH)
Date: 04/03/19 Time: 09:42
Sample: 2012M01 2019M03
Included observations: 87
Failure to improve objective (non-zero gradients) after 291 iterations
Coefficient covariance computed using outer product of gradients
Variable Coefficient Std. Error t-Statistic Prob.
AR(1) 0.889244 0.092193 9.645461 0.0000
AR(2) -0.839447 0.113501 -7.395933 0.0000
AR(3) 0.205376 0.108407 1.894486 0.0618
AR(4) 0.311336 0.083705 3.719441 0.0004
MA(1) -0.732442 59.77391 -0.012254 0.9903
MA(2) 0.999980 163.2116 0.006127 0.9951
SIGMASQ 1091.498 87180.67 0.012520 0.9900
R-squared 0.314586 Mean dependent var 14.61837
Adjusted R-squared 0.263180 S.D. dependent var 40.13705
S.E. of regression 34.45293 Akaike info criterion 10.08138
Sum squared resid 94960.32 Schwarz criterion 10.27979
Log likelihood -431.5400 Hannan-Quinn criter. 10.16127
Durbin-Watson stat 1.894847
Inverted AR Roots .79 .25-.95i .25+.95i -.41
Inverted MA Roots .37+.93i .37-.93i