st: Re: Contrasts and interpretation

["Jaye Brown" <jaye.brown@hotmail.co.uk>]

I am trying to analyse a 3-way anova and look at the 3 way interactions 
using test and got the following results.

. test _coef[m[1]*s[2]*i[2]] = _coef[m[1]*s[2]*i[3]]
( 1)  m[1]*s[2]*i[2] - m[1]*s[2]*i[3] = 0
      F(  1,   162) =    4.24
           Prob > F =    0.0412

. test _coef[m[2]*s[2]*i[2]] = _coef[m[2]*s[2]*i[3]]
( 1)  m[2]*s[2]*i[2] - m[2]*s[2]*i[3] = 0
      Constraint 1 dropped

I am confused as to why I get the message "Constraint 1 dropped" and does 
this mean that I cannot estimate this interaction term?

TIA,
Jaye

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