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Re: st: new dummy variable based on two categorical variables
From
Richard Williams <[email protected]>
To
[email protected]
Subject
Re: st: new dummy variable based on two categorical variables
Date
Sat, 16 Oct 2010 19:34:42 -0500
At 06:22 PM 10/16/2010, Delahanty, Ryan wrote:
I had such awesome help from you stats ballers on this list with the
last Q, I thought I'd take a spin again.
Please correct my language in this email if I'm off in proper terms.
Say I have two variables with i and j different levels, like this:
var1=1,2,3,4; var2=1,2,3
And I want to get ORs on all 12 categories: 1,1; 1,2; 1,3; 2,1... 4,3.
What is the most efficient way to make a new categorical variable
that contains all i x j combinations?
I know once complete, I want to do logistic this way:
xi, prefix(): logistic affec i.newvar
If you have Stata 11, you want
logistic affect var1#var2
Even then, you don't get all i x j combos; something has to serve as
the reference.
-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
HOME: (574)289-5227
EMAIL: [email protected]
WWW: http://www.nd.edu/~rwilliam
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