RSS Ordinary Meeting (organized by the Research Section)
"Sampling bias and logistic models",
by Peter McCullagh (University of Chicago)
Wednesday 6 February 2008, 5pm
RSS Headquarters, 12 Errol Street, London
Summary
This paper considers various forms of random-effects models for binary
data. It concludes that parameter attenuation is a statistical illusion
attributable to sampling bias and ambiguous notation. A new
random-effects model makes it clear that the conditional distribution of
Yi given Xi=x is not the same as the marginal distribution of Y-values
in stratum x. Implications for likelihood calculations and estimating
equations are described.
The paper can be downloaded and more information can be found from:
http://www.maths.lancs.ac.uk/~wite/RSS/
DISCUSSION CONTRIBUTIONS ON THE DAY ARE INVITED. PLEASE CONTACT THE
SECRETARY OF THE RESEARCH SECTION ([log in to unmask]).
Ernst Wit
Secretary Research Section
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Professor Ernst Wit
Chair of Biometrics, Head of Medical Statistics
Department of Mathematics and Statistics
Lancaster University
Lancaster LA1 4YF, UK
Tel. 00 44 (0)1524 593 954
Fax. 00 44 (0)1524 592 681
