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论坛 计量经济学与统计论坛 五区 计量经济学与统计软件 Stata专版
5323 10
2016-12-14
命令如下:mvprobit (organization_in = size1 size2 lnage lnexp hum rd comp1 comp2 tgovern) (process_in = size1 size2 lnage lnexp hum rd comp1 comp2 tgovern) (product_in = size1 size2 lnage lnexp hum rd comp1 comp2 tgovern) (market_in = size1 size2 lnage lnexp hum rd comp1 comp2 tgovern), nolog dr(100)出现如下错误:could not calculate numerical derivatives -- flat or discontinuous region 求助大神该怎么办?
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2016-12-15 06:54:31
试试底下连结是否有帮助?http://www.stata-journal.com/article.html?article=st0423
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2016-12-15 06:59:32
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2016-12-15 13:00:19
黃河泉 发表于 2016-12-15 06:54
试试底下连结是否有帮助?http://www.stata-journal.com/article.html?article=st0423
之前就是参考的这两篇文章的方法,但是不知到为什么,有些特定的变量组回归没有问题,但是换掉一些变量就会出现上述的报错。
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2016-12-15 15:04:43
Revo1ut1on 发表于 2016-12-15 13:00
之前就是参考的这两篇文章的方法,但是不知到为什么,有些特定的变量组回归没有问题,但是换掉一些变量就 ...
It happens! 这种高维度概似函数(likelihood function)的极大过程中,有些函数"长得""太平"了,以致于无法往前(极大值)迈进!
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2016-12-15 18:58:25
黃河泉 发表于 2016-12-15 15:04
It happens! 这种高维度概似函数(likelihood function)的极大过程中,有些函数"长得""太平"了,以致于无 ...
你的意思我不太懂诶
这是迭代过程
Iteration 0:   log likelihood = -2619.1934  
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Iteration 1:   log likelihood = -2537.4064  
Iteration 2:   log likelihood = -2312.4194  
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
Warning: cannot do Cholesky factorization of rho matrix
numerical derivatives are approximate
flat or discontinuous region encountered
Warning: cannot do Cholesky factorization of rho matrix
进行迭代之后就会这样报错,一直出现这个无法继续迭代。这个到底是什么原因呢?要怎么处理呢?
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