McMASTER UNIVERSITY STATISTICS SEMINAR
Week of November 8 - 12, 1999
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SPEAKER:
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- Dr Brajendra C. Sutradhar
- Department of Mathematics and Statistics Statistics,
Memorial University of Newfoundland
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TITLE:
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"Analyzing longitudinally and structurally correlated
data in Generalized Linear Model set-up"
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DAY:
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Wednesday, November 10, 1999
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TIME:
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3:30 p.m. [Coffee & cookies in BSB-202 at 3:00 p.m.]
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PLACE:
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BSB-108
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SUMMARY
In the generalized linear model set up, cluster data may be
correlated because of various possible reasons. There will be two
parts of the talk.
In the first part, we will deal with the problem of estimation of
the regression parameters when repeated observations for an
individual form a cluster but the joint distribution of the responses
in the cluster is unknown. This we will do following the recent work
of Sutradhar and Das (1999, Biometrika) and demonstrate the
application of this new procedure by analyzing a longitudinal data
set on health care utilization by families in the city of St. John's,
NF.
In the second part of the talk, we will deal with mixed effects
models which will reflect heterogeneity across clusters in the
regression coefficients, causing observations from the same cluster
to be correlated. Small s2
asymptotic approach ( s2 being
the variance of the associated random effects) will be explained for
the analysis of mixed binary and mixed Poisson data.
ABOUT THE SPEAKER
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Dr Brajendra Sutradhar is a Professor in the
Department of Mathematics
and Statistics at the
Memorial University of
Newfoundland. He obtained his Ph.D in Statistics from
The University of Western Ontario in 1984.
He has been actively engaged in serving the
Statistical Society of
Canada. Dr. Sutradhar served as the local arrangements
chair for the 1990 annual meeting held in Memorial, and as
the chair of the program committee for the 1997 Silver
Jubilee annual meeting of the society held in Fredericton,
NB. Dr. Sutradhar has been a member of the NSERC statistics
grant selection committee since 1997, he previously served
in this committee in 1992. He was associate editor of
The Canadian Journal
of Statistics from January 1995 to December 1997.
Dr. Sutradhar's research interests include: analyzing
structurally and longitudinally correlated data; dependent
elliptic data with special emphasis on multivariate t data;
measurement error models; sampling; time series analysis; an
non-negative estimation of variance components.
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Brajendra Sutradhar (left) with Vidyadhar
Godambe at the 1999 SSC Meeting in Regina. Photo by Lara
Cowen.
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REFERENCES
The references below, which Dr Sutradhar has suggested as
useful background for his talk, have been placed on reserve at Thode
Library (STATS 770: Statistics Seminar):
[1] Sutradhar, B.C. & Das, K. (1997), "Generalized Linear
Models for Beta Correlated Binary Longitudinal Data," COMMUNICATIONS
IN STATISTICS - THEORY AND METHODS 26, pp. 617-635.
[2] Sutradhar, B.C. & Das, K. (1999), "On the Efficiency of
Regression Estimators in Generalized Linear Models for Longitudinal
Data," BIOMETRIKA 86, pp. 459-465
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