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st: Re: st: Re: st: Re: st: Syntax of –cmp- for an ordered probit selection model |

Date |
Mon, 11 Nov 2013 20:12:01 +0900 (JST) |

Dear Buchanan, Thank you so much for your suggestion. I check the data again, and all the data of the outcome variable is valued 0 or 1. Do you think there may be any other possible problem? Kuo, Chiu-Wei --- On Mon, 2013/11/11, William Buchanan <[email protected]> wrote: > What are the values of your outcome variable? Are any of the values outside of the 0-8 range indicated by the error message? > > Sent from my iPhone > > > On Nov 11, 2013, at 4:53, <[email protected]> wrote: > > > > Dear Tamas, > > > > Thank you so much for the suggestion. > > But the same error message still pops out when I put double quotes on the expression. > > (while in the case where the selection variable is a binomial one, the command works well even without double quotes!) > > > > Do you think there may be any other problem of the syntax? > > > > Kuo, Chiu-Wei > > > >> --- On Mon, 2013/11/11, "Bartus Tamás" <[email protected]> wrote: > >> > >> Dear Kuo, > >> > >> Instead of > >> > >> ind(selection_var*$cmp_probit $cmp_oprobit) > >> > >> try > >> > >> ind("selection_var*$cmp_probit" $cmp_oprobit) > >> > >> Expressions appearing in the indicators option must be enlosed in double quotes > >> > >> Tamas > >> > >>> On 13/11/11, [email protected] wrote: > >>> > >>> > >>> Dear all, > >>> > >>> I am trying to estimate the following selection model. > >>> outcome equation: outcome_var =b1* var_list1 + u > >>> selection equation: selection_var = b2*var_list2 + v > >>> where outcome_var is a binomial variable, and selection_var is an ordered categorical variable. > >>> > >>> I use the command –cmp- (which can be obtained by –ssc cmp-) to estimate the model. My command is > >>> cmp (outcome_var = var_list1) (selection_var = var_list2), ind(selection_var*$cmp_probit $cmp_oprobit) > >>> However, the error message “Indicator for outcome_var must only evaluate to integers between 0 and 8. r(198);” keeps popping out. > >>> > >>> I found out that the same error massage appears whenever the selection variable is an ordered categorical variable, while it disappears and the command works normally when the selection variable is a binomial one. > >>> > >>> In the paper (“Estimating fully observed recursive mixed-process models with cmp”) written by the –cmp- writer, David Roodman, he mentioned that –cmp- is capable of doing the same estimation as –ssm- and –oheckman- do, so I think that –cmp- is the appropriate command for my model. > >>> > >>> I suppose that there is some problem with the part of the syntax, > >>> ind(selection_var*$cmp_probit $cmp_oprobit) > >>> I spent much time to figure out what the correct syntax is but still failed. > >>> I really appreciate it if anyone can point out the problem of my syntax. > >>> Thank you so much. > >>> > >>> Kuo, Chiu-Wei > >>> > >>> * > >>> * For searches and help try: > >>> * http://www.stata.com/help.cgi?search > >>> * http://www.stata.com/support/faqs/resources/statalist-faq/ > >>> * http://www.ats.ucla.edu/stat/stata/ > >> > >> -- > >> > >> Tamás Bartus, PhD > >> Associate Professor, Deputy Director > >> Institute of Sociology and Social Policy > >> Program Director, Doctoral School of Sociology > >> Corvinus University, Budapest > >> 1093 Budapest, Közraktár utca 4-6. > >> Room 424. > >> Phone: +36-1-482-7301 > >> Fax: +36-1-482-7348 > >> Homepage: http://web.uni-corvinus.hu/bartus > >> > >> * > >> * For searches and help try: > >> * http://www.stata.com/help.cgi?search > >> * http://www.stata.com/support/faqs/resources/statalist-faq/ > >> * http://www.ats.ucla.edu/stat/stata/ > > > > * > > * For searches and help try: > > * http://www.stata.com/help.cgi?search > > * http://www.stata.com/support/faqs/resources/statalist-faq/ > > * http://www.ats.ucla.edu/stat/stata/ > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/faqs/resources/statalist-faq/ > * http://www.ats.ucla.edu/stat/stata/ > * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: Re: st: Re: st: Re: st: Syntax of –cmp- for an ordered probit selection model***From:*William Buchanan <[email protected]>

**References**:**Re: st: Re: st: Re: st: Syntax of –cmp- for an ordered probit selection model***From:*William Buchanan <[email protected]>

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