NDLI: Matching models for preference-sensitive group purchasing

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Matching models for preference-sensitive group purchasing

Content Provider	ACM Digital Library
Author	Boutilier, Craig E. Lu, Tyler
Abstract	Matching buyers and sellers is one of the most fundamental problems in economics and market design. An interesting variant of the matching problem arises when self-interested buyers come together in order to induce sellers to offer quantity or volume discounts, as is common in buying consortia, and more recently in the consumer group couponing space (e.g., Groupon). We consider a general model of this problem in which a group or buying consortium is faced with volume discount offers from multiple vendors, but group members have distinct preferences for different vendor offerings. Unlike some recent formulations of matching games that involve quantity discounts, the combination of varying preferences and discounts can render the core of the matching game empty, in both the transferable and nontransferable utility sense. Thus, instead of coalitional stability, we propose several forms of Nash stability under various knowledge and transfer/payment assumptions. We investigate the computation of buyer-welfare maximizing matchings and show the existence of transfers (subsidized prices) of a particularly desirable form that support stable matchings. We also study a nontransferable utility model, showing that stable matchings exist; we develop a further variant of the problem in which buyers provide a simple preference ordering over "deals" rather than specific valuations---a model that is especially attractive in the consumer space---and also show the existence of stable matchings. Finally, computational experiments with buyer-welfare maximization demonstrate the value of our approach.
Starting Page	723
Ending Page	740
Page Count	18
File Format	PDF
ISBN	9781450314152
DOI	10.1145/2229012.2229068
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2012-06-04
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Daily deals Volume discounts Demand aggregation Preferences Cooperative games Stable matching Group purchasing
Content Type	Text
Resource Type	Article

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