An experimental approach is used to examine the performance of three different multiunit auction designs: discriminatory, uniform-price with fixed supply, and uniform-price with endogenous supply. We find the actual strategies to be inconsistent with theoretically identified equilibrium...

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...