Cycles, submanifolds, and structures on normal bundles

We give explicit examples of degree 3 cohomology classes not Poincare dual to submanifolds, and discuss the realisability of homology classes by submanifolds with Spin-C normal bundles.Comment: Several changes including an improvement of Theorem 1, our new examples have torsion-free homolog

Overconfidence Can Improve an Agent's Relative and Absolute Performance in Contests

This paper suggests a potential rationale for the recent empirical finding that overconfident agents tend to self-select into more competitive environments (e.g. Dohmen and Falk, forthcoming). In particular, it shows that moderate overconfidence in a contest can improve the agent's performance relative to an unbiased opponent and can even lead to an advantage for the overconfident agent in absolute terms

On the Positive Effects of Overcon fident Self-Perception in Teams

In this paper, we study the individual payoff effects of overconfident self-perception in teams. In particular, we demonstrate that the welfare of an overconfident agent in a team of one rational and one overconfident agent or a team of two overconfident agents can be higher than that of the members of a team of two rational agents. This result holds irrespective of the assumption about the agents' awareness of their colleague's bias. Moreover, we show that an overcondent agent is always better of when he is unaware of a potential bias of his colleague

Correlated band structure of electron-doped cuprate materials

We present a numerical study of the doping dependence of the spectral function of the n-type cuprates. Using a variational cluster-perturbation theory approach based upon the self-energy-functional theory, the spectral function of the electron-doped two-dimensional Hubbard model is calculated. The model includes the next-nearest neighbor electronic hopping amplitude $t'$ and a fixed on-site interaction $U=8t$ at half filling and doping levels ranging from $x=0.077$ to $x=0.20$. Our results support the fact that a comprehensive description of the single-particle spectrum of electron-doped cuprates requires a proper treatment of strong electronic correlations. In contrast to previous weak-coupling approaches, we obtain a consistent description of the ARPES experiments without the need to introduce a doping-dependent on-site interaction $U$.Comment: 7 pages 4 eps figure

On the Positive Effects of Overcon fident Self-Perception in Teams

In this paper, we study the individual payoff effects of overconfident self-perception in teams. In particular, we demonstrate that the welfare of an overconfident agent in a team of one rational and one overconfident agent or a team of two overconfident agents can be higher than that of the members of a team of two rational agents. This result holds irrespective of the assumption about the agents' awareness of their colleague's bias. Moreover, we show that an overcondent agent is always better of when he is unaware of a potential bias of his colleague.Overconfidence; Team Production

Overconfidence Can Improve an Agent's Relative and Absolute Performance in Contests

This paper suggests a potential rationale for the recent empirical finding that overconfident agents tend to self-select into more competitive environments (e.g. Dohmen and Falk, forthcoming). In particular, it shows that moderate overconfidence in a contest can improve the agent's performance relative to an unbiased opponent and can even lead to an advantage for the overconfident agent in absolute terms.Overconfidence; Contests