Hi all-
I'm running ordered probit models on project level foreign aid data.
I'm running multiply imputed datasets through clarify to get my
predicted probabilities. I've run my base models, and I want to check
them against a model with country dummies. When I attempt this, I get
a "matrix not positive definite" error message. I've done this with
using robust and with standard errors clustered by country. Here's my
code:
estsimp oprobit enviroimpact2 wbcofinancer wbcofyr ldevcom
lwbenvirocount lepiisdb lngo ligdp ligdpgrowth liexportsgnp lischlsec
lipotwat lisulfdiox lithrtndmamm licoallandarea liorgpollperh20
liforest lpop lpolity2 lcorrupt lgovstab _Jcount*, robust mi(isdbno)
where _Jcount* is shorthand for my country dummies, created previously with xi.
Is the solution similar to this* thread? I.e., do I simply need to
ensure that my ado files are properly updated?
I'd appreciate any help on this.
Thanks,
Chris O'Keefe
*http://www.stata.com/statalist/archive/2006-10/msg00097.html
*
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* http://www.ats.ucla.edu/stat/stata/
