In a recent publication [J.A. Berger, L. Reining, F. Sottile, Phys. Rev. B <Emphasis Type="Bold">82, 041103(R) (2010)] we introduced the effective-energy technique to calculate in an accurate and numerically efficient manner the GW self-energy as well as the polarizability, which is required to evaluate the screened...</emphasis>

A monolayer of spherical non-magnetic inclusions in a paramagnetic fluid is known to crystallize in the presence of a perpendicular magnetic field. It is shown, as a function of increasing layer thickness, that an initially stable 2D triangular monolayer becomes unstable with respect to a...

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We empirically investigate the impact of incentive scheme structure on the degree of cooperation in firms using a unique and representative data set. Combining employee survey data with detailed firm level information on the relative importance of individual, team, and company performance for...

"Es muß damit gerechnet werden, daß aus Gründen, die vornehmlich mit anhaltender Wachstumsschwäche einerseits, technologischer Arbeitslosigkeit andererseits zusammenhängen, die die Wirtschaft der Bundesrepublik Deutschland kennzeichnende Beschäftigungskrise andauern wird. Drei Antworten...

Die gegenwärtige Lage der Weltwirtschaft ist von enormen Einkommensunterschieden zwischen reichen und armen Ländern geprägt. Entwicklungsunterschiede dieser Art gibt es erst seit der Epoche des modernen wirtschaftlichen Wachstums (Kuznets). Daher steht die Frage zur Beantwortung an, warum...

This paper investigates the effects of managerial incentives on favoritism in promotion decisions. First, we theoretically show that favoritism leads to a lower quality of promotion decisions and in turn lower efforts. But the effect can be mitigated by pay-for-performance incentives for...