Chris Field
Telephone: (902) 494-3339
Fax : (902) 494-5130
Office: Chase 108
email: field@mathstat.dal.ca
Department of Mathematics and Statistics,
Dalhousie University,
Halifax, Nova Scotia,
Canada B3H 3J5
Current Research
In my research I am looking at problems in a number of areas.
Robustness :
My general interest is to find robust procedures in various
settings, including longitudinal analysis, non-linear regression,
spectral estimation, meta-analysis and extreme value models.
Am also interested in developing methods for constructing and evaluating
robust confidence intervals and tests.
Molecular Biology:
Am interested in developing reliable inference methods in phylogeny where
we estimate trees. In particular am looking at methods for constructing
confidence regions and tests of tree structure. This work is being done
as part of Genome Atlantic.
On a slightly longer term,
am working with others on models for lateral gene transfer.
Saddlepoint Approximations
Have a continuing interest in using saddlepoint methods to evaluate tail
areas accurately in multi-dimensional problems. It is often of interest
to carry out these approximations empirically and it is important to assess
the accuracy of the intervals.
Major Publications
Recent Papers
- "Saddlepoint density approximation for M-estimates" to appear in
Ann.Stat (with A. Almudevar and John Robinson). Click
here for postscript file.
- "Efficent sampling design for larvae of American lobster"
J.Plankton Res. (with R. Miller and A. Reeves).
- "Symbolic computation of cumulants for quadratic statistics in
time series" accepted with revisions for Stat.Comp (with Bruce Smith).
Click here
for postscript file. For a Mathematica notebook which
accompanies the paper, click here.
- "Estimation of single generation sibling relationships based on DNA markers",
J.Agric.,Biol., Env.Stat, 4 (1999), 136-165 (with A. Almudevar).
- "A comparison of confidence intervals for generalized extreme value
distributions" J.Stat.Comp.Sim, (1998) 61, 341-360 (with Debbie Dupuis).
- "Regression for over-determined systems : a fisheries example"
Can.J.Stat., 27 (1999), 25-40 (with L. Manchester and A. MacDougall)
- "Robust estimation of extremes", Canadian Journal of
Statistics, (1998) 26, 199-216 (with Debbie Dupuis)
- "Robust confidence intervals for regression
parameters", Australian Journal of Statistics, 40 (1998) 53-64.
(with A. Welsh)
- "Robust Linear Model Selection by Cross-validation",
J,Amer.Stat.Assoc., 92
(1997), 1017-1023 (with W. Blanchard and E. Ronchetti).
- "Robust regression and small sample confidence intervals", J.Stat Inf
Planning, (1997), 39-48.
Classes Winter 2005