st: Categorical variable and -nestreg-

[David de Jong <davidcdejong@gmail.com>]

Hello all,

New Stata user here. I'm trying to use -nestreg- to run a hierarchical
(not stepwise) regression. I'm having some trouble, and I was hoping
someone could lend a hand. This is the syntax:

nestreg: regress z_target_RT_c12 (condition) ///
(z_neutral_RT_c12 z_nonword_RT_c12 z_int_goals_c12 z_enhance_goals_c12) ///
(c.z_int_goals_c12#condition c.z_enhance_goals_c12#condition)

Condition is categorical, with 2 possible values. All other variables
are continuous.

When I run the syntax, I receive the error:
factor variables not allowed
r(101);

I've figured out nestreg can't handle factor variables, as indicated
by this error message. I've tried using "xi:" before "nestreg" and
appending "i." to "condition" but I still get the "factor variables
not allowed" error message. Is it simply the case that I cannot use
-nestreg- for categorical variables? If so, are there other ways to
deal with this?

Thanks so much,

David de Jong
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