Try SAS Lifereg!
Tobit Analysis Using SAS ======================== SAS offers the functionality of Tobit analysis in PROC LIFEREG. The SAS/STAT User's Guide (Volume 2) discusses Tobit in general terms on page 999, and gives an example of an entire DATA step and PROC LIFEREG performing Tobit on page 1024.
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data subset; input Hours Yrs_Ed Yrs_Exp @@; if Hours eq 0 then Lower=.; else Lower=Hours; datalines; 0 8 9 0 8 12 0 9 10 0 10 15 0 11 4 0 11 6 1000 12 1 1960 12 29 0 13 3 2100 13 36 3686 14 11 1920 14 38 0 15 14 1728 16 3 1568 16 19 1316 17 7 0 17 15 ; proc lifereg data=subset outest=OUTEST(keep=_scale_); model (lower, hours) = yrs_ed yrs_exp / d=normal; output out=OUT xbeta=Xbeta; run;
[此贴子已经被作者于2005-12-14 8:02:55编辑过]