You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
96 lines
3.5 KiB
Plaintext
96 lines
3.5 KiB
Plaintext
7 months ago
|
.-
|
||
|
|
help for ^prtab^ - 2Nov2005
|
||
|
|
.-
|
||
|
|
|
||
|
|
Table of predicted values/probabilities/rates for regression models
|
||
|
|
-------------------------------------------------------------------
|
||
|
|
|
||
|
|
^prtab^ rowvar [colvar [supercolvar]] [^if^ exp] [^in^ range],
|
||
|
|
[^by(^superrowvar^)^ ^x(^variables_and_values^)^ ^r^est^(^stat^)^
|
||
|
|
^o^utcome^(^string^)^ ^b^rief ^noba^se ^nol^abel ^novar^lbl
|
||
|
|
^con^ditional ^a^ll]
|
||
|
|
|
||
|
|
where
|
||
|
|
|
||
|
|
^rowvar^, ^colvar^, ^supercolvar^, and ^superrowvar^ are independent variables
|
||
|
|
in the previous estimation.
|
||
|
|
|
||
|
|
^variables_and_values^ is an alternating list of variables and either
|
||
|
|
numeric values or mean, median, min, max, upper, lower, previous
|
||
|
|
|
||
|
|
^stat^ is either mean, median, min, max, upper, lower, previous, grmean
|
||
|
|
(group mean), grmedian, grmin, grmax
|
||
|
|
|
||
|
|
Description
|
||
|
|
-----------
|
||
|
|
|
||
|
|
After estimating a regression model, ^prtab^ presents a one- to four-way table
|
||
|
|
of the predicted values (probabilities, rate) for different combinations of
|
||
|
|
values of independent variable.
|
||
|
|
|
||
|
|
The command works with cloglog, cnreg, intreg, logit, mlogit, mprobit, nbreg,
|
||
|
|
ologit, oprobit, poisson, probit, regress, slogit, tobit, zinb, zip, ztnb,
|
||
|
|
and ztp.
|
||
|
|
|
||
|
|
Options
|
||
|
|
-------
|
||
|
|
|
||
|
|
^by(superrowvar)^ specifies numeric variable to be treated as superrow. Only
|
||
|
|
one variable is allowed.
|
||
|
|
|
||
|
|
^x()^ sets the values of independent variables for calculating predicted
|
||
|
|
values. The list must alternate variable names and values. The values
|
||
|
|
may be either numeric values or can be mean, median, min, max, previous,
|
||
|
|
upper, or lower. The latter cannot be used if rest() specifies a group
|
||
|
|
summary statistic (e.g., grmean).
|
||
|
|
|
||
|
|
^rest()^ sets the independent variables not specified in x() to their ^mean^
|
||
|
|
(default), ^minimum^, ^maximum^, ^median^ when calculating predicted values.
|
||
|
|
^grmean^ sets these independent variables to the mean conditional on the
|
||
|
|
variables and values specified in x(); ^grmedian^, ^grmax^, and ^grmin^ can
|
||
|
|
also be used. If ^prvalue^ has already been run after the last estimate,
|
||
|
|
^previous^ will set unspecified variables to their prior values. For
|
||
|
|
models other than mlogit, ^upper^ and ^lower^ can be used to set independent
|
||
|
|
variables to their minimum or maximum depending on which will yield the
|
||
|
|
upper or lower extreme predicted value.
|
||
|
|
|
||
|
|
^outcome()^ presents results for the specified outcome. For ordered models or
|
||
|
|
mlogit, the default is to provide results for all outcomes (each one in a
|
||
|
|
separate table); for count models, the default is to present changes in
|
||
|
|
the predicted rate.
|
||
|
|
|
||
|
|
^conditional^ for -ztp- and -ztnb-, table with contain conditional predictions
|
||
|
|
rather than the default unconditional predictions.
|
||
|
|
|
||
|
|
^all^ specifies that any calculations of means, medians, etc., should use
|
||
|
|
the entire sample instead of the sample used to estimate the model.
|
||
|
|
|
||
|
|
^brief^ and ^nobase^ suppress the base values of x in the output.
|
||
|
|
|
||
|
|
^novallbl^ causes the numeric codes to be displayed rather than value labels.
|
||
|
|
|
||
|
|
^nolabel^ causes the variable name to be displayed rather than the variable
|
||
|
|
label.
|
||
|
|
|
||
|
|
Examples
|
||
|
|
--------
|
||
|
|
|
||
|
|
^. probit faculty female fellow phd mcit3 mnas^
|
||
|
|
^. prtab female fellow mnas^
|
||
|
|
|
||
|
|
^. ologit jobclass female fellow pub1 phd^
|
||
|
|
^. prtab female fellow, x(phd=min)^
|
||
|
|
|
||
|
|
^. poisson pub1 female fellow phd enrol^
|
||
|
|
^. prtab female fellow^
|
||
|
|
^. prtab female fellow, outcome(0)^
|
||
|
|
|
||
|
|
.-
|
||
|
|
Authors: J. Scott Long and Jeremy Freese
|
||
|
|
www.indiana.edu/~jslsoc/spost.htm
|
||
|
|
spostsup@@indiana.edu
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|