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st: Problem with ereturn repost


From   SCHOUMAKER Bruno <bruno.schoumaker@uclouvain.be>
To   statalist@hsphsun2.harvard.edu
Subject   st: Problem with ereturn repost
Date   Wed, 22 Dec 2010 17:28:52 +0100

Hello,

I am having a problem with "ereturn repost"

I ran a Poisson model, and want to replace the variance covariance matrix e(V) with a new matrix VARCOV that I prepared

This is an excerpt of the program

xi3: poisson _d i.ageg rcsp1-rcsp2 dumy93 dumy99 bin93 bin99 bin94 bin100, exposure(exposy)

capture program drop foo2
program foo2, eclass
tempname vmat
matrix `vmat' = e(V)
matrix `vmat' = VARCOV
ereturn repost V = `vmat'
end

foo2

matrix list e(V)


when I run it, the new matrix e(V) only contains 0s, whereas the VARCOV matrix does not contain 0s


Has anybody an idea why this happens ?

Thanks

Bruno


symmetric e(V)[15,15]
_d: _d: _d: _d: _d: _d: _d: _d: _Iageg_5 _Iageg_6 _Iageg_7 _Iageg_8 _Iageg_9 _Iageg_10 rcsp1 rcsp2
 _d:_Iageg_5          0
 _d:_Iageg_6          0          0
 _d:_Iageg_7          0          0          0
 _d:_Iageg_8          0          0          0          0
 _d:_Iageg_9          0          0          0          0          0
_d:_Iageg_10 0 0 0 0 0 0 _d:rcsp1 0 0 0 0 0 0 0 _d:rcsp2 0 0 0 0 0 0 0 0 _d:dumy93 0 0 0 0 0 0 0 0 _d:dumy99 0 0 0 0 0 0 0 0 _d:bin93 0 0 0 0 0 0 0 0 _d:bin99 0 0 0 0 0 0 0 0 _d:bin94 0 0 0 0 0 0 0 0 _d:bin100 0 0 0 0 0 0 0 0 _d:_cons 0 0 0 0 0 0 0 0

_d: _d: _d: _d: _d: _d: _d: dumy93 dumy99 bin93 bin99 bin94 bin100 _cons
   _d:dumy93          0
   _d:dumy99          0          0
    _d:bin93          0          0          0
    _d:bin99          0          0          0          0
    _d:bin94          0          0          0          0          0
_d:bin100 0 0 0 0 0 0 _d:_cons 0 0 0 0 0 0 0



--
Bruno SCHOUMAKER

Centre de recherche en démographie et sociétés
Université catholique de Louvain
1-17 PLace Montesquieu
1348 Louvain-la-Neuve
BELGIUM

Tel. +32 10 474136
Fax. +32 10 472952

bruno.schoumaker@uclouvain.be
www.uclouvain.be/demo

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