A recent experimental study of Cai and Wang [Cai, H., Wang, J., 2006. Overcommunication in strategic information transmission games. Games Econ. Behav. 95, 384-394] on strategic information transmission reveals that subjects tend to transmit more information than predicted by the standard equilibrium analysis. To evidence that this overcommunication phenomenon can be explained in terms of a tension between normative social behavior and incentives for lying, we show in a simple sender-receiver game that subjects incurring in costs to punish liars tell the truth more often than predicted by the logit agent quantal response equilibria whereas subjects that do not punish liars after receiving a deceptive message play, on the aggregate, equilibrium strategies. Thus, we can partition the subject pool into two groups, one group of subjects with preferences for truth-telling and one taking into account only material incentives.
While survey data supports a strong relationship between personality and labour market outcomes, the exact mechanisms behind this association remain unexplored. We take advantage of a controlled laboratory set-up to explore whether this relationship operates through productivity. Using a realeffort task, we analyse the impact of the Big Five personality traits on performance. We find that more neurotic subjects perform worse, and that more conscientious individuals perform better. These findings suggest that at least part of the effect of personality on labour market outcomes operates through productivity. In addition, we find evidence that gender and university major affect this relationship.
Recent research has analyzed how individual characteristics, like the exposure to different hormones and symmetry, affect decision-making and strategic behaviour. The present article investigates the effect of symmetry, of exposure to testosterone (T) in utero and during puberty and of current T on cooperation in a Prisoners' Dilemma Game (PDG). T is a hormone with well known effect on males' behaviour, and that promotes activities that seek to increase reproductive success. Fluctuating Asymmetry (FA) reflects the ability of the organism to maintain a stable development and it is usually employed as a variable reflecting genetic quality (low FA values are thought to signal higher genetic quality). Our results show that subjects with intermediate levels of second to fourth digit ratio (a proxy of exposure to T in utero) and with high FA cooperate more often in the PDG. We also observe that the latter effect is due to the fact that FA has an impact on subjects' expectations about the behaviour of their counterpart in the game. These results reinforce the described link between markers related to genetic quality and cooperative behaviour. This possible linkage of individual condition and pro-social behaviour in humans clearly merits further attention.
Experiment, Lying aversion, Social preferences, Strategic information transmission, Truth-telling, C72, C73, D83,
This paper analyzes secession and group formation in the general model of contests due to Esteban and Ray (1999). This model encompasses as special cases rent seeking contests and policy conflicts, where agents lobby over the choice of a policy in a one-dimensional policy space. We show that in both models the grand coalition is the efficient coalition structure and agents are always better off in the grand coalition than in a contest among singletons. Individual agents (in the rent seeking contest) and extremists (in the policy conflict) only have an incentive to secede when they anticipate that their secession will not be followed by additional secessions. Incentives to secede are lower when agents cooperate inside groups. The grand coalition emerges as the unique subgame perfect equilibrium outcome of a sequential game of coalition formation in rent seeking contests. Copyright Springer-Verlag Berlin/Heidelberg 2006Secession, group formation, rent seeking contests, policy conflicts,
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