Date: Thu, 4 Mar 2010 17:50:49 -0800
Reply-To: grigoris <grigoris.argeros@GMAIL.COM>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: grigoris <grigoris.argeros@GMAIL.COM>
Subject: why is spss dropping a category when it shouldn't?
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I was hoping someone will be able to provide me some advice or suggestions.
I have two variables: nativity status (1: foreign-born & 2: native-born) and
citizenship status (1:citizen, 2:not-citizen, and 3: not applicable). I
combined the above two variables into 2 new dummies, which look like this:
A) foreign-born & not citizen =1 ; native-born & everyone in B
(fbnotcitizen=1 & others=0)
B) foreign-born & citizen = 1 ; native-born & everyone in A
(fbcitizen=1 & others=0)
as for the not-applicables, I made sure i only included the native-born.
When I run logistic regression, spss automatically drops one category. I do
not want to include a reference category; I want to include both categories.
I'm assuming this should not happen since i'm taking all the foreign-born
and dividing them into groups (citizen & non-citizen).
I would greatly appreciate any advice/suggestion as to what to do?
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