The ability of markets to aggregate diverse information is a cornerstone of economics and finance, and empirical evidence for such aggregation has been demonstrated in previous laboratory experiments. Most notably Plott and Sunder (1988) find clear support for the rational expectations...

In a seminal work, Plott and Sunder (1988) offer support for the rational expectations hypothesis and report evidence that markets with certain features aggregate dispersed information. However, their results are based on only a few observations and our attempt to replicate the key findings of...