Welcome to KIT WITHERS' Home Page
I'm a research statistician at the Applied Mathematics Group of
the Industrial Research Ltd, Lower Hutt, New Zealand. If you want an idea of some of my
research interests you could look at this latex file of my publications. This includes extending cusum
theory to track functionals other than the mean, reducing inference
error, bias reduction, finite samples, and adjusting for rounding.
I'm also modelling cellphones and reverberations systems for clients within
IRL.
And a number of other things.
I've recently worked out maximum likelihood and M-estimate theory for the
model
signal = signal + signal * noise
that is Y_i = m_i(theta) + s_i(theta) * e_i for i=1,...,n
where the "noise" e_1 ... e_N are independent and identically distributed
and the location and scale signals are
smooth functions of an unknown vector theta.
CLIMATE CHANGE
I've developed estimation theory for mixtures of distributions and applied
it to rainfall.
I've also modelled temperature and riverflow series,
and applied cusum extensions to detect trend and changing variability in
climate series.
Currently I'm modelling the effect of trend
and changing variability on extremes (eg extreme temperature).
OTHER INTERESTS.
Kit Withers
c.withers"at"irl.cri.nz (work), kitw"at"slingshot.co.nz (home)
- I use "at" for @ to avoid spam -
phone +64 4 569 0459 (work), +64 4 934 4477 (home), fax +64 4 569 0003 (work),
