[Limdep Nlogit List] Calculating implicit prices for MNL interactions model

[Bakti Hasan Basri]

Hi everyone,
I've calculated implicit prices (or part-worth) value for a MNL interactions model with a Wald test. The problem is the value I got from the Wald test is different if i calculated manually. Thus i assumed the command i've used is wrong. The command (e.g. for attribute 1) that i've used is shown below:
Wald
; Labels=ame,fac1,fac2,info1,info2,natt1,natt2,pri1,cpri,epri,apri1,apri2,apri3,epri1,epri2,
ethpri1,ethpri2,ipri1,ipri2,ipri3
; start=B
; var=varb
;fn1=-ame/(pri1+cpri*.369)+epri*.277+apri1*.388+apri2*.138+apri3*.175+
epri1*.277+epri2*.492+ethpri1*.388+ethpri2*.112+inpri1*.515+inpri2*.266+inpri3*.129)$
 
pri1=unadjsuted price coefficient
cpri,epri,...,ipri3=inteactions coefficients
0.369,0.277,...,0.129= is the average value.
 
Could anyone please suggests the right command to do it. Any suggestions is much appreciated.
 
BaktiHB


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