MNL efficiency measures undefined

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MNL efficiency measures undefined

Postby jane5555 » Thu Sep 15, 2022 6:51 am

For the below orthogonal design I'm getting an error which says that the MNL efficiency measures are undefined. How do I resolve this?

Design
; alts = optionA* , optionB* , optionC* , optionD*
; rows = 16
; block = 4
; orth = seq
; model:
U( optionA ) = btraveltime[-0.2] * tt[1,2,15,26] +
bfare[-0.5] * fare[1865,1900,860,690] +
bdelay[-0.03] * delay [3,6,44,78] +
bsafety[0.2] * safety[3,5,8,9] +
bsecurity[0.3] * security[3,5,8,9] +
bdirect.dummy[0.1] * direct [0,1] +
bwifi.dummy[0.1] * wifi [0,1] /

U( optionB ) = btraveltime * tt + bfare * fare + bdelay * delay +
bsafety * safety + bsecurity * security +
bdirect * direct + bwifi.dummy * wifi /

U( optionC ) = btraveltime * tt + bfare * fare + bdelay * delay +
bsafety * safety + bsecurity * security +
bdirect * direct + bwifi.dummy * wifi /

U( optionD ) = btraveltime * tt + bfare * fare + bdelay * delay +
bsafety * safety + bsecurity * security +
bdirect * direct + bwifi.dummy * wifi
$
jane5555
 
Posts: 7
Joined: Tue Sep 13, 2022 8:41 am

Re: MNL efficiency measures undefined

Postby Michiel Bliemer » Thu Sep 15, 2022 10:18 am

Your priors are not appropriate (too large), see also my response to your other post.
Michiel Bliemer
 
Posts: 1705
Joined: Tue Mar 31, 2009 4:13 pm


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