The data files used for the examples in this text can be downloaded in a zip file from the Stata Web site. You can then use a program such as zip to unzip the data files.
Example 20.5 on page 697 using recid.dta.
use recid, clear
stset durat, failure(cens=0)
failure event: cens == 0
obs. time interval: (0, durat]
exit on or before: failure
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1445 total obs.
0 exclusions
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1445 obs. remaining, representing
552 failures in single record/single failure data
80013 total analysis time at risk, at risk from t = 0
earliest observed entry t = 0
last observed exit t = 81
streg workprg priors tserved felon alcohol drugs black married educ age, dist(weibull) nohr
failure _d: cens == 0
analysis time _t: durat
Fitting constant-only model:
Iteration 0: log likelihood = -1739.8944
Iteration 1: log likelihood = -1716.1367
Iteration 2: log likelihood = -1715.7712
Iteration 3: log likelihood = -1715.7711
Fitting full model:
Iteration 0: log likelihood = -1715.7711
Iteration 1: log likelihood = -1669.1785
Iteration 2: log likelihood = -1634.3693
Iteration 3: log likelihood = -1633.0405
Iteration 4: log likelihood = -1633.0325
Iteration 5: log likelihood = -1633.0325
Weibull regression -- log relative-hazard form
No. of subjects = 1445 Number of obs = 1445
No. of failures = 552
Time at risk = 80013
LR chi2(10) = 165.48
Log likelihood = -1633.0325 Prob > chi2 = 0.0000
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_t | Coef. Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
workprg | .0908893 .0906478 1.00 0.316 -.0867772 .2685558
priors | .0887867 .0134355 6.61 0.000 .0624535 .1151198
tserved | .0135625 .0016808 8.07 0.000 .0102682 .0168567
felon | -.2994775 .105974 -2.83 0.005 -.5071826 -.0917723
alcohol | .4473611 .1057353 4.23 0.000 .2401236 .6545985
drugs | .2814605 .0978644 2.88 0.004 .0896499 .4732711
black | .4537147 .0883037 5.14 0.000 .2806426 .6267867
married | -.1515864 .1092454 -1.39 0.165 -.3657035 .0625307
educ | -.0232984 .0194196 -1.20 0.230 -.0613601 .0147633
age | -.0037246 .000525 -7.09 0.000 -.0047536 -.0026956
_cons | -3.402094 .3010177 -11.30 0.000 -3.992077 -2.81211
-------------+----------------------------------------------------------------
/ln_p | -.2158398 .0389149 -5.55 0.000 -.2921115 -.1395681
-------------+----------------------------------------------------------------
p | .8058644 .0313601 .7466852 .8697338
1/p | 1.240904 .0482896 1.149777 1.339252
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