Various buy-price options occupy a significant portion of transactions in major online auction sites, although their posted-price attribute seems to run counter to the virtue of the auction mechanism. To investigate their influence on the behavior of bidders and sellers, we examine auctions at...

Recently "practicals" such as computers and clothes account for a substantial amount of the total volume in online auction marketplaces. However, as bidders for practicals may easily find the same goods elsewhere, it is likely that they bid less aggressively than bidders of rare items such as...