I had a similar problem and the professor of statistics at my PhD program said that omitting the constant radically changes your model. You should never omit it because if an intercept "really" exists, it is not wise to ask Stata to put it = 0; if the intercept is "really" zero, Stata will find it.
Nicola
At 02.33 10/01/2007 -0500, Juan Julio Gutierrez <[email protected]> wrote:
>Deal all
>
>I am regressing the same model w/ and w/out the intercept using "xtlogit, re" in an unbalanced
>panel data. However the odds' signs change if the constant is dropped.
>
>Could you help me explain this? (I am copying both outputs)
>I appreciate you help
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