做面板tobit模型，得到如下结果，请问哪里出现了问题

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收藏 2019-10-18

xttobit tfpch groth gov finance able fix lnzc lnl roe debt,ll(0) nolog tobit

Random-effects tobit regression                Number of obs    =    1235
Group variable: id                            Number of groups =    119

Random effects u_i ~ Gaussian                Obs per group: min =       7
                                                            avg =    10.4
                                                            max =       11

                                             Wald chi2(9)    = 765.35
Log likelihood  = -770.28259                   Prob > chi2       = 0.0000

------------------------------------------------------------------------------
   tfpch |    Coef. Std. Err.    z P>|z|    [95% Conf. Interval]
-------------+----------------------------------------------------------------
   groth | .0034287 .0001298 26.41 0.000    .0031742 .0036832
      gov |  -.4806069 .5599462 -0.86 0.391 -1.578081 .6168674
   finance |  -.1758176 .0787608 -2.23 0.026    -.330186 -.0214493
      able | .1483908 .1587894    0.93 0.350 -.1628307 .4596122
      fix |  -.2336302 .105273 -2.22 0.026 -.4399614 -.027299
      lnzc | .0343244 .0157409    2.18 0.029    .0034728 .0651761
      lnl |  -.0407361 .0166925 -2.44 0.015 -.0734528 -.0080194
      roe | .0005329 .0002547    2.09 0.036    .0000336 .0010321
      debt | .1741469 .0746592    2.33 0.020    .0278176 .3204762
   _cons | .4524957 .2633397    1.72 0.086 -.0636406 .9686319
-------------+----------------------------------------------------------------
/sigma_u | 1.82e-18 .0542216    0.00 1.000 -.1062723 .1062723
/sigma_e | .4514783 .0090842 49.70 0.000    .4336735 .4692831
-------------+----------------------------------------------------------------
      rho | 1.63e-35 9.69e-19                            0          1
------------------------------------------------------------------------------
Likelihood-ratio test of sigma_u=0: chibar2(01)= 0.00 Prob>=chibar2 = 1.000

  Observation summary:       0  left-censored observations
                        1235    uncensored observations
                           0 right-censored observations

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xanxus0516

2020-5-27 23:29:59

请问这个问题你解决了吗，我也遇到这种情况了
Random-effects tobit regression                Number of obs    =       162
Group variable: city                         Number of groups  =       162

Random effects u_i ~ Gaussian                Obs per group:
                                                            min =       1
                                                            avg =       1.0
                                                            max =       1

Integration method: mvaghermite                Integration pts.  =       12

                                             Wald chi2(6)    =    80.84
Log likelihood  =  261.55636                   Prob > chi2    =    0.0000

------------------------------------------------------------------------------
      xlz |    Coef. Std. Err.    z P>|z|    [95% Conf. Interval]
-------------+----------------------------------------------------------------
   rjczsr | 1.19352 .2931996    4.07 0.000    .6188594 1.768181
ylwszcbz | 14.42632 3.894282    3.70 0.000    6.793669 22.05898
      rkmd | .0004079 .0000721    5.66 0.000    .0002666 .0005492
   cshsp |  -.1796972 .4430969 -0.41 0.685 -1.048151 .6887567
   llhzb |  -10.33145 1.454646 -7.10 0.000    -13.1825 -7.480396
   czzcfq | 3.739951 1.109442    3.37 0.001    1.565485 5.914417
   _cons | 1.135074 .1698728    6.68 0.000    .8021296 1.468019
-------------+----------------------------------------------------------------
/sigma_u | 1.69e-08 1.44e-09 11.75 0.000    1.41e-08 1.97e-08
/sigma_e | .157582 .0130175 12.11 0.000    .1320683 .1830958
-------------+----------------------------------------------------------------
      rho | 1.15e-14 2.72e-15                   7.19e-15 1.82e-14
------------------------------------------------------------------------------
LR test of sigma_u=0: chibar2(01) = 0.00             Prob >= chibar2 = 1.000

         0  left-censored observations
         88    uncensored observations
         74 right-censored observations

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