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st: Is it valid to use the individual ratios (i.e. Xi/Yi) in the dependent or independent part of a regression model?


From   guhjy@kmu.edu.tw
To   statalist@hsphsun2.harvard.edu
Subject   st: Is it valid to use the individual ratios (i.e. Xi/Yi) in the dependent or independent part of a regression model?
Date   Fri, 25 May 2012 12:36:19 +0800

The ratio of two normally distributed variables (X and Y) has no mean
or variance.
1. Why is it valid that the "ratio" command estimates the mean and se of ratios?
2. Is it valid to use the individual ratios (i.e. Xi/Yi) in the
dependent or independent part of a regression model?

Thank you.

Sincerely Yours,
Jinn-Yuh Guh, M.D.
Division of Nephrology
Department of Internal Medicine
Kaohsiung Medical University
100 Zihyou 1st Rd.
Kaohsiung, Taiwan 80756
E-mail:guhjy@kmu.edu.tw
TEL: 886-7-3121101 EXT.7353~12
FAX: 886-7-3228721
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