Using Stata 8.2 I estimated a multinomial logit model as follows:
. mlogit marstat tvfact1, basecategory(6) ;
I then ran the mfx compute command, using several different versions of
syntax I found, obtaining the following result:
. mfx compute, predict(outcome(3)) ;
invalid 'BECAUSE'
r(198);
What am I doing wrong? And, what kind of error occurs 'BECAUSE'? :-)
Full results are listed below, should anyone be interested (note--I use
";" to signal the end of a command, tvfact1 is an interval-level scale of
traditional values ranging from zero to one, and ultimately I want to
estimate models with more regressors; finally, thanks for any help you
can provide) :
. mlogit marstat tvfact1, basecategory(6) ;
Iteration 0: log likelihood = -9129.6375
Iteration 1: log likelihood = -8933.6588
Iteration 2: log likelihood = -8932.2662
Iteration 3: log likelihood = -8932.2653
Multinomial logistic regression Number of obs = 6877
LR chi2(5) = 394.74
Prob > chi2 = 0.0000
Log likelihood = -8932.2653 Pseudo R2 = 0.0216
------------------------------------------------------------------------------
marstat | Coef. Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
MARRIED |
tvfact1 | 2.755563 .1691352 16.29 0.000 2.424064 3.087062
_cons | -1.07647 .088055 -12.22 0.000 -1.249055 -.9038857
-------------+----------------------------------------------------------------
NOT MARRIE~ |
tvfact1 | -.8979021 .2608498 -3.44 0.001 -1.409158 -.386646
_cons | -.7464122 .122721 -6.08 0.000 -.986941 -.5058833
-------------+----------------------------------------------------------------
WIDOWED |
tvfact1 | 2.361517 .8398351 2.81 0.005 .7154704 4.007564
_cons | -5.034124 .4667658 -10.79 0.000 -5.948968 -4.11928
-------------+----------------------------------------------------------------
DIVORCED |
tvfact1 | 1.020558 .2798024 3.65 0.000 .4721552 1.56896
_cons | -1.888785 .1431811 -13.19 0.000 -2.169415 -1.608155
-------------+----------------------------------------------------------------
SEPARATED,~ |
tvfact1 | 1.697536 .3699212 4.59 0.000 .9725039 2.422568
_cons | -2.915832 .1966681 -14.83 0.000 -3.301295 -2.53037
------------------------------------------------------------------------------
(Outcome marstat==NEVER BEEN MARRIED is the comparison group)
. mfx compute, predict(outcome(3)) ;
invalid 'BECAUSE'
r(198);
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