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st: Overid on ivprobit
From
Abekah Nkrumah <[email protected]>
To
[email protected]
Subject
st: Overid on ivprobit
Date
Thu, 3 May 2012 23:58:49 +0100
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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