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From |
Arne Risa Hole <arnehole@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Trouble with mixlogit (error) with binary dependent variable |

Date |
Tue, 5 Feb 2013 10:47:31 +0000 |

No. It should be a unique identifier for every occasion where a firm had the choice between innovating or not. Look carefully at the structure of the example datasets in the paper. Arne On 5 February 2013 01:50, SAM MCCAW <sam2stata@gmail.com> wrote: > Thanks much. So if I have one variable, innovation, with a possible > value of (0,1) then my group variable should just be group = 1? > > Thanks so much. > > SAM > > On Wed, Jan 30, 2013 at 6:36 AM, Arne Risa Hole <arnehole@gmail.com> wrote: >> Sam >> >> -mixlogit- is a user-written command available from SJ/SSC. >> >> You've defined the group variable incorrectly - this should be an >> identifier of the choice sets, not the alternatives within a choice >> set. See the examples in >> http://www.stata-journal.com/article.html?article=st0133. >> >> There might be other problems with the way you've set up the data too >> but this is hard to know without seeing a snippet of the data. Have >> you tried running the model using -clogit- first? If this doesn't work >> you can be 100% sure that -mixlogit- won't either. >> >> Arne (author of -mixlogit-) >> >> On 30 January 2013 00:55, SAM MCCAW <sam2stata@gmail.com> wrote: >>> Dear STATA gurus, >>> >>> I am having trouble running a mixed logit model. Please help! >>> >>> - The dependent variable is binary (0,1) (innovation). >>> >>> - My independent variables (var1 var2 var3) are continuous variables >>> (they are logs of a count, excluding 0). >>> >>> -The group variable just takes a value of 1 or 2, because I only have >>> two choice occasions, using: egen group = group(innov_1) >>> >>> - Code: mixlogit innov, group(group) rand(var1 var2 var3) id(id) or >>> >>> mixlogit innov var4, group(group) rand(var1 var2 var3 var5) id(id) >>> >>> I am getting the following errors: >>> >>> [P] error . . . . . . . . . . . . . . . . . . . . . . . . Return code 2000 >>> no observations; >>> You have requested some statistical calculation and there are >>> no observations on which to perform it. Perhaps you specified >>> if exp or in range and inadvertently filtered all the data. >>> >>> (end of search) >>> >>> I have over 30,000 for all the variables specified in the simplest >>> model I ran and I still get the same error. >>> >>> Here are the sumamry statistics for my variables: >>> >>> Variable | Obs Mean Std. Dev. Min Max >>> -------------+-------------------------------------------------------- >>> innov_1 | 32523 .4774467 .4994988 0 1 >>> var1 | 33065 2.104231 1.589854 0 4.859812 >>> var2 | 33065 1.669999 1.0031 0 4.060443 >>> var3 | 33065 .6736071 .9022467 0 3.78419 >>> var4 | 33065 2.141496 2.795201 0 9.953027 >>> -------------+-------------------------------------------------------- >>> var5 | 28893 1.506202 .9606917 0 3.295837 >>> var6 | 5953 -2.335463 1.106637 -4.60517 1.96611 >>> >>> I am completely lost about what to do next. >>> >>> Thanks for your help. >>> >>> SAM >>> * >>> * 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/

**References**:**Re: st: Trouble with mixlogit (error) with binary dependent variable***From:*SAM MCCAW <sam2stata@gmail.com>

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