Bidding Algorithms for Simultaneous Auctions
Amy Greenwald
http://www.cs.brown.edu/people/amygreen
Department of Computer Science
Brown University
2:00pm Friday, October 26, 2001 Lecture Hall V, Engineering and Computer Science Building
ABSTRACT
This talk is concerned with computational problems that
arise in the design of bidding agents for simultaneous auctions.
Three natural bid determination (BD) problems are identified---allocation,
acquisition, and completion. The first part of the paper contains
theoretical results. It is argued (i) BD in double auctions, where
goods can be sold as well as bought, can be formally reduced to the problem
of BD in single-sided auctions; and (ii) BD problems in simultaneous auctions
are isomorphic to common variants of the winner determination problem.
In the second part of the talk, two algorithmic approaches to bid determination
are proposed: heuristic search and integer linear programming. Using
data from the First International Trading Agent Competition (TAC), these
alternative techniques are compared empirically. The key findings
reported herein are (i) for the dimensions of TAC, optimal solutions to
BD problems are tractable; (ii) optimal solutions do not scale; and (iii)
heuristic approximation methods scale well, achieving near optimal solutions
with predictable time and space requirements.
Dr. Amy Greenwald is an Assitant Professor of Computer
Science at Brown University. She has degrees from NYU, Cornell, Pennsylvania
and Oxford. Her current research concerns the study of multi-agent
learning on the Internet via game-theoretic models of computational interactions.