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st: RE: Overid on ivprobit


From   "Schaffer, Mark E" <[email protected]>
To   <[email protected]>
Subject   st: RE: Overid on ivprobit
Date   Fri, 4 May 2012 01:21:51 +0100

-overid- doesn't (yet) support the i. operator, I'm afraid.

--Mark

> -----Original Message-----
> From: [email protected] 
> [mailto:[email protected]] On Behalf Of 
> Abekah Nkrumah
> Sent: 03 May 2012 23:59
> To: [email protected]
> Subject: st: Overid on ivprobit
> 
> Dear All,
> 
> I am trying to use overid after ivprobit but stata returns an 
> error message. I have checked several times and seem not to 
> know what is happening. Can some one help. The results is below
> 
>  ivprobit place_deliv  woman_age_yrs woman_age_yrssq 
> i.birth_order2 age_at_1st_birth i.moda_edu12 (empowerment12= 
> age_polig clusta_death_dif
> > f) if year==2003, twostep
> Checking reduced-form model...
> 
> Two-step probit with endogenous regressors        Number of 
> obs   =      2437
>                                                   Wald 
> chi2(8)    =    329.42
>                                                   Prob > chi2 
>     =    0.0000
> 
> --------------------------------------------------------------
> ----------------
>              |      Coef.   Std. Err.      z    P>|z|     
> [95% Conf. Interval]
> -------------+------------------------------------------------
> ----------
> -------------+------
> empowerme~12 |   5.378231   1.129086     4.76   0.000     
> 3.165263    7.591199
> woman_age_~s |   .1238111   .0532797     2.32   0.020     
> .0193848    .2282374
> woman_age_~q |   -.001565   .0007225    -2.17   0.030     
> -.002981    -.000149
>              |
> birth_order2 |
>           2  |  -.5072639   .1132554    -4.48   0.000    
> -.7292403   -.2852875
>           3  |   -.764831   .1393952    -5.49   0.000    
> -1.038041   -.4916214
>           4  |  -1.025213   .1708814    -6.00   0.000    
> -1.360135    -.690292
>              |
> age_at_1st~h |  -.0200801   .0114204    -1.76   0.079    
> -.0424637    .0023036
> 1.moda_edu12 |    .288899   .1405919     2.05   0.040      
> .013344     .564454
>        _cons |  -4.307615    .606373    -7.10   0.000    
> -5.496084   -3.119146
> --------------------------------------------------------------
> ----------------
> Instrumented:  empowerment12
> Instruments:   woman_age_yrs woman_age_yrssq 2.birth_order2 
> 3.birth_order2
>                4.birth_order2 age_at_1st_birth 1.moda_edu12 age_polig
>                clusta_death_diff
> --------------------------------------------------------------
> ----------------
> Wald test of exogeneity:     chi2(1) =    15.90           
> Prob > chi2 = 0.0001
> 
> . overid
> 
> 1b:  operator invalid
> r(198);
> 
> 
> 
> Gordon
> *
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> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
> 


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