Bayesians in VENEZUELA
(by Bruno Sansó)
|
The
whole idea was motivated by the presence at USB, while Luis was a undergraduate
student in the early seventies,
of
Ignacio Rodríguez Iturbe, who took a PhD in M.I.T. and went back
to his home country to work at USB and the
Instituto
Venezolano de Investigaciones Científicas; he was very interested
in the possible applications of Bayesian
statistics
to hydrology, in particular, in how to enlarge limited information in some
river basins, using regional
information
from other sites nearby. Ignacio motivated Luis Raúl and other students
to work on Bayesian statistics and
later
made important contributions to its applications to hydrology. He nowadays
holds a chair in Princeton, but he still
is
an influential figure in Venezuela.
The
work in the basement started for Luis Raúl with a stats lab that
was called TAE, "Taller de Estadística", within the
Maths
Department at USB. In the eighties TAE was a gathering place for statisticians
and several students got interested
in
Bayesian statistics. I remember struggling with the 70Mb of disk space
and the 8Mb of RAM memory of our
brand
new Sun 3/110 workstation to squeeze in the code of Bayes 4 that Allan
Skene brought us from Nottingham and
the
revolutionary New S that William Nazaret gave us from AT&T. Few years
later, in '92, several faculty members of the
areas
of Numerical Analysis and Mathematical Programming, approached TAE, with
the idea of forming a more
comprehensive
centre. A four years grant of 800,000 dollars from the Venezuelan Government,
sponsored by the
Interamerican
Bank of Development, led to the creation of CESMa (Centro de Estadistica
y Software Matematico), under
the
directorship of Marianela Lentini. The same year we organised one of Zellner's
meetings on Bayesian statistics and
econometrics,
which was well attended by many statisticians from the Americas and left
some people pondering the
good
properties of the añejo distribution for a while. The latest development
of our group occurred in 1996 when the
USB
decided to form a new Department called "Department of Scientific Computing
and Statistics", enhancing the
importance
of statistics within the university.
@ Our group
The hard core of Bayesians at USB is made of the following people:
Víctor De Oliveira (vdo@cesma.usb.ve). Spent a year as a postdoc
at the Institute of Statistical Sciences after taking a
PhD
at the University of Maryland College Park under the supervision of Benjamin
Keden. He joined us in September '98
and
works in spatial problems and geostatistics.
María Eglée Pérez (eglee@cesma.usb.ve). Finished her
PhD at Universidad Central de Venezuela in 1994 under the
supervision
of Luis Raúl Pericchi. She works in problems related to inference
for the Exponential Family, Bayesian
analysis
of discrete data and biostatistics. She has a wonderful voice, well known
among the public of the cabaret at
the
last Valencia.
José Miguel Pérez (jperez@cesma.usb.ve). He arrived to USB
in September '98, from Purdue University where he
finished
a PhD under the supervision of Jim Berger. He works in methods related
to automatic priors in particular
mixture
models with applications to the clustering and characterisation of variables.
Luis Raúl Pericchi (pericchi@cesma.usb.ve). Took his PhD at Imperial
College in 1981. He is the most senior member
of
our group and his work these days is very much focused on model comparison,
with particular interest in non
subjective
priors, for which he and Jim Berger developed the Intrinsic Bayes Factor.
His academic activities span a
wide
range of topics including applications to medical statistics, engineering,
econometrics and official statistics. He is
known
as a player of Brazilian guitar.
Raquel Prado (raquel@cesma.usb.ve). She is back from North Carolina since
September last year; there she took her
PhD
at the Institute of Statistics and Decision Sciences under the supervision
of Mike West. She works in non stationary
time
series and applications of Bayesian methods to signal processing.
Bruno Sansó (bruno@cesma.usb.ve). I finished my PhD at Universidad
Central de Venezuela in 1992 as a student of
Pericchi
working on Bayesian robustness and spent some time at the University of
Liverpool under the supervision of
Phil
Brown. I now work on spatio-temporal models with particular interest in
environmental variables.
Other colleagues, with different degrees of Bayesianism share our statistical activities, they are:
Lelys Guenni, PhD Griffith University, 1992. Spatio-temporal models for
environmental variables, stochastic hydrology.
In
her last talk she promised that it was her last non-Bayesian one!
Raúl Jiménez, PhD Universidad Central de Venezuela, 1992.
Asymptotic behaviour of stochastic processes, theory of
statistical
information.
Isabel Llatas, PhD Wisconsin-Madison, 1987. Experimental design, multivariate
statistics, statistical quality assessment.
She
is currently the director of CESMa.
José Luis Palacios, PhD Berkeley 1982. Random walks on graphs, discrete stochastic processes, combinatorics.
Adolfo Quiroz, PhD MIT 1986. Nonparametric methods, goodness of fit for multivariate data.
Leonardo Saab, Master Wisconsin Madison, 1985. Statistical applications
of quality management, growth curves for
Venezuelan
children.
@ Working environment
USB
has a very pleasant campus in the outskirts of Caracas, the capital of
Venezuela. The weather is fairly mild thanks
to
the 1,000 plus meters above the sea level and the low density of the urban
development around the campus. Tropical
gardens,
that are part of the university's pride, surround the buildings and create
a very pleasant compare our
campus
to a resort!
At
CESMa we work mainly with Sun workstations, at last count they were around
16, the last arrival being a powerful
450
Enterprise with two processors. We have the tradition of naming them after
characters of the Latin American
literature
and, as a result, we have a colourful network populated with thieves, whores,
heroes, fantastic people
created
by the imagination of García Márquez, Vargas Llosa and the
like.
We
have around 20 students following courses in three programmes: Diploma
Master and PhD. All three programmes
are
quite new: they have been in place for less than two years, nevertheless
they already seem to be a success.
We
have definitely climbed some steps up from the basement during the last
years and in spite of the uncertainties that
we
live these days in our country, I think that the future is bright for Bayesian
statistics in Venezuela. This article is
available
in html with links and pictures at www.cesma.usb.ve/novedades/isbae.html
.