stata做空间计量随机效应分析，报错430，求高手指点江山_ negative semidefinite - Stata专版

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carolinehello 发表于 2014-8-25 21:41:22 |只看作者 |坛友微信交流群|倒序 |AI写论文

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用stata12.0做空间计量SEM随机效应的回归，命令格式如下： xsmle entr lq inn lpd stre lskl fdi gov lnsci lnedu lnpas lnfre lnpost lntel,re emat(w) model(sem)执行时，报错；结果窗口显示内容如下：
Iteration 0: Log-likelihood =  -13315.62
Iteration 1: Log-likelihood = -13224.632
Iteration 2: Log-likelihood = -13221.844  (backed up)
Iteration 3: Log-likelihood = -13220.497  (backed up)
Iteration 4: Log-likelihood = -13220.166  (backed up)
Iteration 5: Log-likelihood = -13220.001  (backed up)
Iteration 6: Log-likelihood =  -13219.99  (backed up)
Iteration 7: Log-likelihood = -13219.988  (backed up)
Iteration 8: Log-likelihood = -13219.987  (backed up)
numerical derivatives are approximate
nearby values are missing
Iteration 9: Log-likelihood = -13219.986  (backed up)
numerical derivatives are approximate
nearby values are missing
Iteration 10:  Log-likelihood = -13219.986  (backed up)
numerical derivatives are approximate
nearby values are missing
Iteration 11:  Log-likelihood = -13219.986  (backed up)
numerical derivatives are approximate
nearby values are missing
Hessian is not negative semidefinite
r(430);
点开 r(430)后，显示以下内容：

[P]    error . . . . . . . . . . . . . . . . . . . . . . . .  Return code 430
      convergence not achieved;
      You have estimated a maximum-likelihood model, and Stata's
      maximization procedure failed to converge to a solution;
      see [R] maximize.  Check if the model is identified.
请各位用过stata战友，给我指一条明路！我在此等候您的佳音。