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. webuse nhanes2f
. ologit health female black age c.age#c.age
Iteration 0: log likelihood = -15764.397
Iteration 1: log likelihood = -14929.927
Iteration 2: log likelihood = -14921.458
Iteration 3: log likelihood = -14921.446
Iteration 4: log likelihood = -14921.446
Ordered logistic regression Number of obs = 10335
LR chi2(4) = 1685.90
Prob > chi2 = 0.0000
Log likelihood = -14921.446 Pseudo R2 = 0.0535
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health | Coef. Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
female | -.116065 .0355698 -3.26 0.001 -.1857804 -.0463495
black | -.8847055 .0583359 -15.17 0.000 -.9990418 -.7703691
age | -.0263631 .0076194 -3.46 0.001 -.0412968 -.0114294
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c.age#c.age | -.0001585 .0000813 -1.95 0.051 -.0003178 8.78e-07
-------------+----------------------------------------------------------------
/cut1 | -4.61937 .1667706 -4.946234 -4.292505
/cut2 | -3.13433 .1639119 -3.455592 -2.813069
/cut3 | -1.708866 .1623721 -2.02711 -1.390623
/cut4 | -.4566481 .1611269 -.7724509 -.1408452
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. brant, detail
Estimated coefficients from binary logits
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Variable | y_gt_1 y_gt_2 y_gt_3 y_gt_4
-------------+--------------------------------------------
female | 0.243 -0.065 -0.141 -0.236
| 3.07 -1.31 -3.36 -4.89
black | -0.962 -0.875 -0.962 -0.830
| -9.28 -11.76 -13.22 -8.81
age | -0.172 -0.078 -0.052 -0.001
| -6.94 -6.35 -5.67 -0.06
|
c.age#c.age | 0.001 0.000 0.000 -0.000
| 4.75 2.21 1.26 -3.31
|
_cons | 8.385 4.553 2.260 -0.104
| 13.27 15.87 11.48 -0.49
----------------------------------------------------------
legend: b/t
Brant test of parallel regression assumption
| chi2 p>chi2 df
-------------+------------------------------
All | 151.83 0.000 12
-------------+------------------------------
female | 29.78 0.000 3
black | 4.22 0.239 3
age | 55.86 0.000 3
c.age#c.age | 43.36 0.000 3
A significant test statistic provides evidence that the parallel
regression assumption has been violated.
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