Re: st: Test of coefficient equality

[Richard Williams <Richard.A.Williams.5@nd.edu>]

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.

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