The purpose of this paper is to examine changes in business seller and individual seller usage ofelectronic auctions on eBay over a five year period. This study compares eBay auction datagathered from auctions of CPUs in both 1999 and 2004. The change in the proportion of auctionsby business sellers over the five year time period was of particular interest. In order to identifybusiness sellers a number of criteria were examined including self-description as a business,collection of state sales tax, the use of Dutch auctions and the sale of other computer products inother auctions. Once the determination of business status was made a number of factors wereexamined to determine whether the changes were significant over the five year period.
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