Statalist


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

st: poisson distribution, transformed variables and implications for xtreg fe or re


From   Allison.Milner@student.griffith.edu.au
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: poisson distribution, transformed variables and implications for xtreg fe or re
Date   Mon, 02 Mar 2009 20:43:01 +1000

Dear statalist,
I have a query about using the poisson distribution and transformed variables. I have a panel data set with mortality information (DV) from 74 countries from 1980 to 2006. I have transformed the DV using a square-root transformation. Previously I have been estimating this DV using xtreg fe, re and xtabond2. However, someone mentioned to me that I should try and use the poisson distribution in my estimation techniques. I have tried this using xtgee but this will not run on some of my clusters (due to missing data?). Also, I am not sure whether I can run a dynamic model such as xtabond2 using the poisson distrubution.
I have noticed that other research papers have not bothered to use a poisson distribution and merely used transformed DV scores. Is it neccessary that I use a poisson distribution?
Any advice would be greatly appreciated
Thanks
Allison

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index