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Full-Text Articles in Econometrics
Information Aggregation And The Cognitive Make-Up Of Traders, Brice Corgnet, Mark Desantis, David Porter
Information Aggregation And The Cognitive Make-Up Of Traders, Brice Corgnet, Mark Desantis, David Porter
ESI Working Papers
We assess the effect of the cognitive make-up of traders on the informational efficiency of markets. We put forth that cognitive skills, such as cognitive reflection, are crucial for ensuring the informational efficiency of markets because they endow traders with the ability to infer others’ information from prices. Using laboratory experiments, we show that information aggregation is significantly enhanced when (i) all traders possess high levels of cognitive sophistication and (ii) this high level of cognitive sophistication is common information for all traders. Our findings shed light on the cognitive and informational constraints underlying the efficient market hypothesis.
Let’S Chat... When Communication Promotes Efficiency In Experimental Asset Markets, Brice Corgnet, Mark Desantis, David Porter
Let’S Chat... When Communication Promotes Efficiency In Experimental Asset Markets, Brice Corgnet, Mark Desantis, David Porter
ESI Working Papers
The growing prevalence of stock market chat rooms and social media suggests communication between traders may affect market outcomes. Using data from a series of laboratory experiments, we study the causal effect of trader communication on the price efficiency of markets. We show that communication allows markets to convey private information more effectively. This effect is most pronounced when the communication platform publicizes a reputation score that might identify a person as not being truthful. This illustrates the need for market designers to consider social interactions when designing market institutions to leverage the social motives that foster information aggregation.