Asela Gunawardana, Christopher Meek, and Jody Biggs
We explore the role of aggregators in search ad markets and their effects on that marketplace. Aggregators can have positive effects similar to those of an arbitrageur. We argue and provide empirical evidence that, unlike arbitrageurs, aggregators can continue to profit even in the absence of price imbalances. Furthermore, we argue that the standard generalized second price (GSP) auction mechanisms create incentives for aggregators to design their sites to negatively affect the user experience and that the existence of aggregators in the marketplace can also negatively affect non-aggregator merchants. We propose a specific quality-based GSP mechanism that reduces the negative impacts of aggregators on the user and marketplace while allowing some of their positive benefits for users.
In ACM EC Workshop on Ad Auctions
Publisher Association for Computing Machinery, Inc.
Copyright © 2007 by the Association for Computing Machinery, Inc. Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, to republish, to post on servers, or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from Publications Dept, ACM Inc., fax +1 (212) 869-0481, or email@example.com. The definitive version of this paper can be found at ACM’s Digital Library –http://www.acm.org/dl/.