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From |
"Dimova, Ralitza" <Ralitza.Dimova@econ.kuleuven.ac.be> |

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

Subject |
RE: st: Test of coefficient equality |

Date |
Fri, 5 Mar 2004 13:58:43 +0100 |

Thanks for the quick response. Yes, I have THREE INDEPENDENT SAMPLES for 1995, 1997 and 2001. But for TWO of them (1995 and 1997) SOME of the people are common, so I can also create a quasi panel just for those two years. Right now I am trying to use all three independent samples, so it would be useful for me to know how to do the testing with the time trend that you had proposed. But it won't hurt to know also whether something similar can be done over the quasi-panel. THANKS A LOT. I'll be looking forward to hearing from you. -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of Richard Williams Sent: Friday, March 05, 2004 12:25 PM To: statalist@hsphsun2.harvard.edu Subject: Re: st: Test of coefficient equality At 10:04 AM 3/5/2004 +0100, you wrote: >Hi. This is probably a very silly question, but better ask than struggle! >Is there any way I can compare the coefficients from Multinomial logits >over time? The situation is as follows. I am running a multinomial logit >over choices A, B,C and D on data drawn from random samples in year1 and >year2. How can I compare whether the effect of variable X on say choice A >between years 1 and 2 has changed significantly? Thanks. Ralitza To clarify, are these two independent samples, or is it the same people interviewed twice? If independent samples, then I think it is a fairly straightforward matter of setting up and testing interactions with time; but before trying to work through it, why don't you clarify first. * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**RE: st: Test of coefficient equality***From:*Richard Williams <Richard.A.Williams.5@nd.edu>

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