Bookmark and Share

Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: Multiple Imputation


From   Bobby Jo otto <[email protected]>
To   [email protected]
Subject   st: Multiple Imputation
Date   Thu, 15 Aug 2013 14:53:08 -0400

Hello, 

I have a question regarding multiple imputation.  I conducted multiple imputation in SPSS and then transferred the data back to Stata.  After the imputation, my n=88,800, which includes the original data set plus the 5 imputations.  When I delete the original values (drop in 1/14,800) I'm left with a sample size of 74,000.  

My problem however,  is that when I set Stata to recognize that my data is imputed (mi set flong; mi set M=5), it multiplies 74,000 by 6 which then gives me a sample size of 444,000 (each imputed data set is multiplied by 6).  Thus, each specific respondent has data 30 different times.  

Example of data set: (up to 30) 

imputation_       aid
1			111111
1			111111
5			111111
4			111111
4			111111
3			111111
4			111111
1			111111
2			111111



Can anyone tell me exactly what I am doing wrong? 

Thanks in advance! 
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/faqs/resources/statalist-faq/
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2018 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   Site index