我要考察地区效应对家庭收入的影响,因变量家庭人均收入划分两个阶段,大于1689赋值为1,小于等于1689为0,所以因变量是二分类变量,用非线性分层模型考察(HGLM),首先是零模型分析,我的命令是
. xtmelogit pcinc_ad|| commid:
结果是
Refining starting values:
Iteration 0: log likelihood = -10209.148
Iteration 1: log likelihood = -10203.565
Iteration 2: log likelihood = -10203.562
Performing gradient-based optimization:
Iteration 0: log likelihood = -10203.562
Iteration 1: log likelihood = -10203.562
Mixed-effects logistic regression Number of obs = 18358
Group variable: commid Number of groups = 233
Obs per group: min = 16
avg = 78.8
max = 114
Integration points = 7 Wald chi2(0) = .
Log likelihood = -10203.562 Prob > chi2 = .
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pcinc_ad | Coef. Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
_cons | -.6302385 .0796407 -7.91 0.000 -.7863313 -.4741456
------------------------------------------------------------------------------
------------------------------------------------------------------------------
Random-effects Parameters | Estimate Std. Err. [95% Conf. Interval]
-----------------------------+------------------------------------------------
commid: Identity |
sd(_cons) | 1.178406 .06029 1.065972 1.3027
------------------------------------------------------------------------------
LR test vs. logistic regression: chibar2(01) = 3420.61 Prob>=chibar2 = 0.0000
请问如何求出零模型的ICC,就是组间关联度,这个结果只有一个sd(_CONS),没有sd(Residual)啊,请问如何看ICC
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