[Limdep Nlogit List] More On Standard Errors of Marginal Effects

[David Tufte]

I added the ;all option, and it did  not change anything. Here is the section of the output file from a stripped down version of my model.


--> oprobit;
    all;
    marginal effects;
    lhs=inverse;
    rhs=one,age,age_sq$
Normal exit from iterations. Exit status=0.
+---------------------------------------------+
| Ordered Probability Model                   |
| Maximum Likelihood Estimates                |
| Model estimated: Mar 18, 2009 at 10:48:39PM.|
| Dependent variable              INVERSE     |
| Weighting variable                 None     |
| Number of observations             1015     |
| Iterations completed                  8     |
| Log likelihood function       -1037.060     |
| Number of parameters                  5     |
| Info. Criterion: AIC =          2.05332     |
|   Finite Sample: AIC =          2.05338     |
| Info. Criterion: BIC =          2.07757     |
| Info. Criterion:HQIC =          2.06253     |
| Restricted log likelihood     -1037.590     |
| McFadden Pseudo R-squared      .0005110     |
| Chi squared                    1.060327     |
| Degrees of freedom                    2     |
| Prob[ChiSqd > value] =         .5885089     |
| Underlying probabilities based on Normal    |
+---------------------------------------------+


+---------------------------------------------+
| Ordered Probability Model                   |
| Cell frequencies for outcomes               |
|  Y Count Freq  Y Count Freq  Y Count Freq   |
|  0    24 .023  1    90 .088  2   482 .474   |
|  3   419 .412                               |
+---------------------------------------------+
+--------+--------------+----------------+--------+--------+----------+
|Variable| Coefficient  | Standard Error |b/St.Er.|P[|Z|>z]| Mean of X|
+--------+--------------+----------------+--------+--------+----------+
---------+Index function for probability
 Constant|    1.51834943       .58708329     2.586   .0097
 AGE     |     .01882813       .02661521      .707   .4793   43.1743842
 AGE_SQ  |    -.00017596       .00029120     -.604   .5457   1968.63448
---------+Threshold parameters for index
 Mu(1)   |     .76961147       .04787622    16.075   .0000
 Mu(2)   |    2.20533491       .05473961    40.288   .0000


+-------------------------------------------------------------------------+
| Summary of Marginal Effects for Ordered Probability Model (probit)      |
+-------------------------------------------------------------------------+
Variable|    Y=00    Y=01    Y=02    Y=03    Y=04    Y=05    Y=06    Y=07 |
--------------------------------------------------------------------------+
AGE        -.0010  -.0025  -.0037   .0073
AGE_SQ      .0000   .0000   .0000  -.0001
+---------------------------------------------------------------------------+
|   Cross tabulation of predictions. Row is actual, column is predicted.    |
|   Model = Probit    .  Prediction is number of the most probable cell.    |
+-------+-------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+
| Actual|Row Sum|  0  |  1  |  2  |  3  |  4  |  5  |  6  |  7  |  8  |  9  |
+-------+-------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+
|      0|     24|    0|    0|   24|    0|
|      1|     90|    0|    0|   90|    0|
|      2|    482|    0|    0|  482|    0|
|      3|    419|    0|    0|  419|    0|
+-------+-------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+
|Col Sum|   1015|    0|    0| 1015|    0|    0|    0|    0|    0|    0|    0|
+-------+-------+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+


Regards,

Dave Tufte 

David Tufte
Associate Professor
Department of Economics and Finance
School of Business
Southern Utah University
351 W. University Blvd.
Cedar City  UT  84720
351 W. University Blvd.
Cedar City  UT  847820


351 West Center St.
Cedar City, UT 84720

Office: (435) 586-5407
Fax:     (435) 586-5493 

http://www.suu.edu/faculty/tufte