I am running Ordered Logit. The dataset has 63 observations and 15
indepedent variables (both continuous and discrete). The dependent
variable can have upto 11 different categories. The regression output
gives me all the coefficients and standard errors. However, at the bottom
it also has the message: "1 observation completely determined. Standard
errors questionable." I am wondering what the problem is and what do I do
about it.
The stata output is given below:
Iteration 0: log likelihood = -92.641813
Iteration 1: log likelihood = -66.736876
Iteration 2: log likelihood = -64.209856
Iteration 3: log likelihood = -63.453725
Iteration 4: log likelihood = -63.443017
Iteration 5: log likelihood = -63.443005
Ordered logit estimates Number of obs =
63
LR chi2(16) =
58.40
Prob > chi2 =
0.0000
Log likelihood = -63.443005 Pseudo R2 =
0.3152
------------------------------------------------------------------------------
rankrtg | Coef. Std. Err. z P>|z| [95% Conf.
Interval]
-------------+----------------------------------------------------------------
saffac | .0350928 .0178187 1.97 0.049 .0001688
.0700167
sale | 1.119154 .6425062 1.74 0.082 -.1401352
2.378443
sec | -.1102068 .3889417 -0.28 0.777 -.8725186
.652105
cr21 | .0305279 .0475921 0.64 0.521 -.0627509
.1238067
fato21 | -.0360065 .1269887 -0.28 0.777 -.2848999
.2128869
ato21 | -.1417399 .7478067 -0.19 0.850 -1.607414
1.323934
rote21 | -.0506792 .0762365 -0.66 0.506 -.2001001
.0987417
roa21 | .508321 .1503139 3.38 0.001 .2137112
.8029309
invto21 | -.0418474 .0748019 -0.56 0.576 -.1884564
.1047615
arto21 | .0129681 .0048992 2.65 0.008 .0033658
.0225704
alyrperre | .0122951 .0190002 0.65 0.518 -.0249447
.0495349
allyrdiv | .0000415 .0000156 2.66 0.008 .0000109
.000072
oplev21 | .8905895 2.286121 0.39 0.697 -3.590126
5.371305
lev21 | 3.680201 1.675826 2.20 0.028 .3956416
6.96476
ros21 | -.0837651 .0386418 -2.17 0.030 -.1595017
-.0080285
ex | -.1628938 .3919536 -0.42 0.678 -.9311087
.605321
-------------+----------------------------------------------------------------
_cut1 | 6.110627 2.889368 (Ancillary parameters)
_cut2 | 9.053814 2.991929
_cut3 | 11.5265 3.180239
_cut4 | 13.89932 3.407926
------------------------------------------------------------------------------
note: 1 observation completely determined. Standard errors questionable.
Any help would be greatly appreciated.
Thanks,
Rachna
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