In most models of market microstructure tractability requires that all market participants know the number (and presence) of competing insiders. I drop this assumption in experimental asset markets. Outcomes are qualitatively consistent with theoretical models when the number of insiders is...

Using a unique dataset of complete bid information for every IPO auction in Taiwan during 1995--2000, we examine the behaviors and returns of two groups--institutional and retail investors--in a setting in which underwriters do not have pricing or allocation discretion. We find that the bids of...

We examine how experience affects the decisions of individual investors and institutions in IPO auctions to bid in subsequent auctions, and their bidding returns. We track bidding histories for all 31,476 individual investors and 1,232 institutional investors across all 84 IPO auctions during...