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>

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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...

A real-effort experiment is investigated in which supervisors have to rate the performance of individual workers who in turn receive a bonus payment based on these ratings. We compare a baseline treatment in which supervisors are not restricted in their rating behavior to a forced distribution...

"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...

"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...

We empirically investigate if tournaments between heterogeneous contestants are less intense. To test our hypotheses we use professional sports data from the TOYOTA Handball-Bundesliga, the major handball league in Germany. Using either differences in betting odds or rankings to measure ability...