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We study the impact of unjust inequality on social trust and trustworthiness, and its separate effect on the economically successful and the unsuccessful, in a controlled economic experiment. We find evidence for a negative effect of unfair economic inequality on social interactions. Probing the boundaries of this effect, we document that this erosion of social capital critically depends on the context: if a well-off person is not directly responsible for the outcome of the worse-off person, then we observe no negative effects on trust and trustworthiness in the aggregate. Moreover, our data do not support the view that higher status or wealth leads to an erosion of pro-social attitudes: the successful are always more generous; groups of unsuccessful persons are least efficient and least generous in the trust game.

Time pressure is a central aspect of economic decision making nowadays. It is therefore natural to ask how time pressure affects decisions, and how to detect individual heterogeneity in the ability to successfully cope with time pressure. In the context of risky decisions, we ask whether a person's performance under time pressure can be predicted by measurable behavior and traits, and whether such measurement itself may be affected by selection issues. We find that the ability to cope with time pressure varies significantly across decision makers, leading to selected subgroups that differ in terms of their observed behaviors and personal traits. Moreover, measures of cognitive ability and intellectual efficiency jointly predict individuals' decision quality and ability to keep their decision strategy under time pressure.

We study the effect of the addition of a futures market, in which contracts maturing in the last period of the life of the asset can be traded. Our experiment has two treatments, one in which a spot market operates on its own, and a second treatment in which a spot and futures market are active simultaneously. We find that the futures market reduces spot market mispricing among a trader population prone to bubbles, while having no effect on mispricing in a group not prone to it. Thus, overall, futures markets aid price discovery in the spot market, although the futures markets themselves exhibit considerable overpricing. Individuals with higher cognitive reflection test (CRT) scores achieve greater earnings, as they tend to sell in the overpriced futures market, while traders with lower CRT score make purchases in the futures market. We also consider the predictive power of an enhanced CRT measure (ECRT), which weightstwo types of incorrect answers differently.

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