When are mixed equilibria relevant?

Mixed strategy equilibria — Nash (NE) and maximin (MM) are cornerstones of game theory, but their empirical relevance has always been questionable. We study in the laboratory two games, each with a unique NE (and distinct) MM completely mixed strategies. Treatment variables include matching protocol (pairwise random vs population mean matching), whether time is discrete or continuous, players can specify explicit mixtures only pure realizations. mixes predict observed behavior relatively well treatments, better than all treatments. However, most pairwise uniform NE. Regret-based sign preserving dynamics capture regularities across