if you have missing values on some but not all of the items in the scale,
then impute first and sum at the end of the process of imputation.
Gary King
: Gary King, King(a)Harvard.Edu
http://GKing.Harvard.Edu :
: Center for Basic Research Direct (617) 495-2027 :
: in the Social Sciences Assistant (617) 495-9271 :
: 34 Kirkland Street, Rm. 2 HU-MIT DC (617) 495-4734 :
: Harvard U, Cambridge, MA 02138 eFax (928) 832-7022 :
On Fri, 22 Nov 2002, Michael Sauer wrote:
I have downloaded both Amelia for Windows and Clarify
for Stata and I
have a questions about something I am not clear about.
I have survey data that I had intended to create summated scales on
based on scales that had been defined by the survey author. Before I
can create these scales, it seems to me that I need to impute the
missing values for the individual survey items and run my ordered
probit using the scale calculated above as the dependent variable.
At what point in the Amelia (imputing the missing observations) to
Clarify process would I create my summated scales?
I would really appreciate any help you can provide.
Michael L. Sauer
Associate Vice President for Administration
University of Nevada Las Vegas
4505 Maryland Parkway
Las Vegas, NV 89154
Phone: (702) 895-1073
Fax: (702) 895-4929
email: msauer(a)unlv.edu
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