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From |
"Nick Cox" <n.j.cox@durham.ac.uk> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: RE: ML for a simple estimation |

Date |
Mon, 2 Feb 2009 19:14:05 -0000 |

Your program -maxlik- indicates that there are four arguments, i.e. four things are fed to it. If you supply fewer arguments than that, a syntax error is likely. . set trace on And see what happens line by line. More importantly, I suggest studying published worked examples more closely. Nick n.j.cox@durham.ac.uk Vincenzo I'm very new to ML command. I'm trying to estimate a model using MLE. As you can see in my program (in reality this is a simplified version), I defined the parameters to be estimated in the args string (these are L0 L1 and d). The other letters in the loglikelihood represent variable. When I run the program I have an r(198) for invalid sintax. Maybe the way the program works is not clear to me.. Any suggestion about how to fix the problem i welcome program define maxlik args lnf L0 L1 d quietly replace `lnf' = (2-d0b-d0f)*ln(`L0')+ln((`L1')/(`d')) if $ML_y1==0 quietly replace `lnf' = 1+ln((`L0')/(`d')) if $ML_y1==1 end ml model lf maxlik (x=d0b d0f) ml maximize * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: ML for a simple estimation***From:*Vincenzo <marvin2007@tiscali.it>

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