xsmle进行空间面板模型sar与sdm分析时,显示convergence not achieved,
有人建议加入初始值后,通过copy()进行调整,依旧显示如此convergence not achieved,
但是如果采用随机效应,就不会出现。。
求各位老师前辈支支招,卡在这一点上很久了。。。
. xsmle i2r1addvalue esc,wmat(W1) model(sar) robust nolog type(both) fe dlag(1) from(0.15 3.03 -0.17 13.
> 14,copy)
convergence not achieved
Dynamic SAR with spatial and time fixed-effects Number of obs = 300
Group variable: idspatial2 Number of groups = 30
Time variable: yeartwo Panel length = 10
R-sq: within = 0.5008
between = 0.2463
overall = 0.4696
Mean of fixed-effects = 6.6271
Log-pseudolikelihood = -1036.0931
(Std. Err. adjusted for 30 clusters in idspatial2)
------------------------------------------------------------------------------
| Robust
i2r1addvalue | Coef. Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
Main |
i2r1addvalue |
L1. | .1527704 .0566662 2.70 0.007 .0417068 .2638341
|
esc | 3.031845 .7674459 3.95 0.000 1.527679 4.536011
-------------+----------------------------------------------------------------
Spatial |
rho | -.1709007 .0795636 -2.15 0.032 -.3268425 -.0149589
-------------+----------------------------------------------------------------
Variance |
sigma2_e | 13.15536 2.017866 6.52 0.000 9.200412 17.1103