SFB 649 "Economic Risk" - C.A.S.E. -
PASCAL - WIAS
[ Friday and Saturday, Dec. 5 &
6, 2008 ]
Data sets with a very large number of explanatory variables are
becoming more and more common as features of both applications and
theoretical investigations. In economical applications for instance,
the revealed preference of market players is observed, and the analyst
tries to understand them by a complex model by which the players'
behavior can be understood as an indirect observation.
art statistical approaches often formulate such models as inverse
problems, but the corresponding methods can suffer of the curse of
dimensionality: when there are "too many" possible explanatory
variables, additional regularization is needed. Inverse problem theory
already offers sophisticated regularization methods for smooth models,
but is just beginning to integrate sparsity concepts. For
high-dimensional linear models, sparsity regularizations have proved to
be a convincing way to tackle the issue both in theory and
but there remains a vast ground to be explored.
statistics community are also recent advances in machine learning
methodology and statistical learning theory, where the themes of
sparsity and inverse problems have been intertwined.
The workshop will focus on the different ways to attack a same
question: there are many potential models to choose from, but
them is relatively simple - each model is parameterized by many
variables, most of them are zero. Yet, the choice of the right model or
regularization parameter is crucial to obtain stable and reliable
The meeting will take place from Friday,
morning to Saturday, Dec. 6th, early afternoon.
Weierstrass Institute for Applied Analysis and Stochastic
10117 Berlin Mitte
Gilles Blanchard, Wolfgang Härdle, Markus Reiß,
and Vladimir Spokoiny.
Ms. Andrea Fiebig:
Institute of Mathematics
Unter den Linden 6,
D-10099 Berlin, Germany,
FAX no. +49 (0)30 2093 - 5848
Tel. +49 (0)30-2093-5860
Confirmed Invited Speakers
Registration fee is 100 Euro, 50 for students,
coffee. The registration fee will be waved under some special
The number of participants is strictly limited. Deadline for
contributed talks is October 31st. Please fill in the registration form
[note: PDF] and send it by fax or postal mail to Andrea Fiebig