Shillbidding is a technique that can be employed by auction systems in
order to drive up pricing and/or interest in an item on auction.
Shillbidding is done by a shill (also known as a potted plant)?a person
that acts toward the benefit of the auctioneers without making it
publicly known that s/he has a close relationship with the former?who
places phony bids in order to incite a bidding war among auction
participants.
Shillbidding tends to occur more in online than traditional auctions as
online auction site members are able to create multiple accounts in
order to bid on their own items. Many online auction sites such as eBay
and Ziinga make use of sophisticated methods to detect collusive
activity in order to prevent shillbidding.
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