ICE: An Expressive Iterative Combinatorial Exchange

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ICE: An Expressive Iterative Combinatorial Exchange

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Title: ICE: An Expressive Iterative Combinatorial Exchange
Author: Lubin, Benjamin; Parkes, David; Shneidman, Jeffrey; Lahaie, Sebastien; Cavallo, Ruggiero; Juda, Adam

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Citation: Lubin, Benjamin, Adam Juda, Ruggiero Cavallo, Sebastien Lahai, Jeffrey Shneidman, and David C. Parkes. 2008. ICE: An expressive iterative combinatorial exchange. Journal of Artificial Intelligence Research 33: 33-77.
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Abstract: We present the design and analysis of the first fully expressive, iterative combinatorial exchange (ICE).
The exchange incorporates a tree-based bidding language (TBBL) that is concise and expressive for
CEs. Bidders specify lower and upper bounds in TBBL on their value for different trades and refine these
bounds across rounds. These bounds allow price discovery and useful preference elicitation in early
rounds, and allow termination with an efficient trade despite partial information on bidder valuations. All
computation in the exchange is carefully optimized to exploit the structure of the bid-trees and to avoid
enumerating trades. A proxied interpretation of a revealed-preference activity rule, coupled with simple
linear prices, ensures progress across rounds. The exchange is fully implemented, and we give results
demonstrating several aspects of its scalability and economic properties with simulated bidding
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