topic how to program latent class Tobit II model in SAS in SAS Programming https://communities.sas.com/t5/SAS-Programming/how-to-program-latent-class-Tobit-II-model-in-SAS/m-p/12031#M1241 <HTML><HEAD></HEAD><BODY><P> thank you for your suggestion!</P></BODY></HTML> Fri, 30 Sep 2011 15:53:05 GMT Doris 2011-09-30T15:53:05Z how to program latent class Tobit II model in SAS https://communities.sas.com/t5/SAS-Programming/how-to-program-latent-class-Tobit-II-model-in-SAS/m-p/12028#M1238 <HTML><HEAD></HEAD><BODY><P>I want to use latent class approach to control for the heterogeneity in Tobit II model (sample selection model) in SAS. I suppose there is no standard package in SAS to do that and SAS IML can be use to program. </P><P></P><P>I am wondering whether anyone who can provide some hints or examples on how to used latent class approach to control for heterogeneity in Tobit model? or anyone who has an example of Tobit model estimation by using Maximum likelihood in SAS/IML (not the standard proc qlim)? </P><P></P><P>the most relevant material I found is the article " <STRONG style="font-size: 12pt; font-family: Times New Roman;"><STRONG style="font-size: 12pt; font-family: Times New Roman;">THE TOBIT MODEL: AN EXAMPLE OF MAXIMUM LIKELIHOOD ESTIMATION SAS/IML".</STRONG></STRONG></P><P><A href="http://www2.sas.com/proceedings/sugi22/STATS/PAPER293.PDF">http://www2.sas.com/proceedings/sugi22/STATS/PAPER293.PDF</A>"</P><P>but they didn't introduce latent class in Tobit model.</P><P></P><P>I really appreciate any example code, comments or thoughts here. thanks a lot in advance!</P></BODY></HTML> Mon, 19 Sep 2011 22:15:43 GMT https://communities.sas.com/t5/SAS-Programming/how-to-program-latent-class-Tobit-II-model-in-SAS/m-p/12028#M1238 Doris 2011-09-19T22:15:43Z how to program latent class Tobit II model in SAS https://communities.sas.com/t5/SAS-Programming/how-to-program-latent-class-Tobit-II-model-in-SAS/m-p/12029#M1239 <HTML><HEAD></HEAD><BODY><P> might get better response in the IML forum at <A _jive_internal="true" href="https://communities.sas.com/community/sas_iml_and_sas_iml_studio">http://communities.sas.com/community/sas_iml_and_sas_iml_studio</A> </P><DIV class="mcePaste" id="_mcePaste" style="position: absolute; width: 1px; height: 1px; overflow: hidden; top: 0px; left: -10000px;"></DIV></BODY></HTML> Tue, 20 Sep 2011 11:38:47 GMT https://communities.sas.com/t5/SAS-Programming/how-to-program-latent-class-Tobit-II-model-in-SAS/m-p/12029#M1239 Peter_C 2011-09-20T11:38:47Z how to program latent class Tobit II model in SAS https://communities.sas.com/t5/SAS-Programming/how-to-program-latent-class-Tobit-II-model-in-SAS/m-p/12030#M1240 <HTML><HEAD></HEAD><BODY><P>Or, even better, the statical forum: <A _jive_internal="true" href="https://communities.sas.com/community/sas_statistical_procedures">http://communities.sas.com/community/sas_statistical_procedures</A></P><P></P><P>Hallahan's paper describes the Tobit model in terms of a latent variable (p. 4, second column) and shows how the output of his SAS/IML program is the same as is producced for a Tobit model created by using PROC LIFEREG. Here is a link to the LIFEREG doc that shows how to evaluate a Toibt model: <A href="http://support.sas.com/documentation/cdl/en/statug/63962/HTML/default/viewer.htm#statug_lifereg_sect035.htm">http://support.sas.com/documentation/cdl/en/statug/63962/HTML/default/viewer.htm#statug_lifereg_sect035.htm</A></P><P></P><P>If this doesn't answer your question, maybe you could post a reference or example that indicates what is special about your problem that can't be handled by LIFEREG.</P></BODY></HTML> Wed, 21 Sep 2011 14:17:48 GMT https://communities.sas.com/t5/SAS-Programming/how-to-program-latent-class-Tobit-II-model-in-SAS/m-p/12030#M1240 Rick_SAS 2011-09-21T14:17:48Z how to program latent class Tobit II model in SAS https://communities.sas.com/t5/SAS-Programming/how-to-program-latent-class-Tobit-II-model-in-SAS/m-p/12031#M1241 <HTML><HEAD></HEAD><BODY><P> thank you for your suggestion!</P></BODY></HTML> Fri, 30 Sep 2011 15:53:05 GMT https://communities.sas.com/t5/SAS-Programming/how-to-program-latent-class-Tobit-II-model-in-SAS/m-p/12031#M1241 Doris 2011-09-30T15:53:05Z how to program latent class Tobit II model in SAS https://communities.sas.com/t5/SAS-Programming/how-to-program-latent-class-Tobit-II-model-in-SAS/m-p/12032#M1242 <HTML><HEAD></HEAD><BODY><P> thank you for the suggestion</P></BODY></HTML> Fri, 30 Sep 2011 15:53:37 GMT https://communities.sas.com/t5/SAS-Programming/how-to-program-latent-class-Tobit-II-model-in-SAS/m-p/12032#M1242 Doris 2011-09-30T15:53:37Z