6,085 research outputs found
Linking of Repeated Games. When Does It Lead to More Cooperation and Pareto Improvements?
Linking of repeated games and exchange of concessions in fields of relative strength may lead to more cooperation and to Pareto improvements relative to the situation where each game is played separately. In this paper we formalize these statements, provide some general results concerning the conditions for more cooperation and Pareto improvements to materialize or not and analyze the relation between both. Special attention is paid to the role of asymmetries.Environmental Policy, Linking, Folk Theorem, Tensor Game, Prsioners' Dilemma, Full Cooperation, Pareto Efficiency, Minkowski Sum, Vector Maximum, Convex Analysis
Debt stabilizing fiscal rules
Unstable government debt dynamics can typically be corrected by various fiscal instruments, like appropriate adjustments in government spending, public transfers, or taxes. This paper investigates properties of state-contingent debt targeting rules which link stabilizing budgetary adjustments around a target level of long-run debt to the state of the economy. The paper establishes that the size of steady-state debt is a key determinant of whether it is possible to find a rule of this type which can be implemented under all available fiscal instruments. Specifically, considering linear feedback rules, the paper demonstrates that there may well exist a critical level of debt beyond which this is no longer possible. From an applied perspective, this finding is of particular relevance in the context of a monetary union with decentralized fiscal policies. Depending on the level of long-run debt, there might be a conflict between a common fiscal framework which tracks deficit developments as a function of the state of the economy and the unrestricted choice of fiscal policy instruments at the national level. JEL Classification: E63, H62fiscal regimes, overlapping generations
The aesthetics of gravity
Beyond taste or fashion, there exists a lasting and common consensus for a perception of beauty linked to weight or weightlessness. This essay attempts to develop an understanding of different approaches to the issue of weight and weightlessness in architecture and civil engineering. In complex urban and programmatic settings, however, the question of gravity has to be integrated with many other issues, as exemplified by Albini and HeIg's La Rinascente department store in Rom
European Financial Markets After EMU: A First Assessment
This paper reviews the first evidence on the impact of European Monetary Union on European capital markets, one year after the launch of the single currency. Our assessment of this evidence is very favourable. On almost all counts EMU has either changed the European financial landscape already drastically or has the potential to do so in the future. We argue that this is less due to the well-known direct effects of EMU, such as the elimination of intra-European currency risk, than to a number of indirect consequences through feedback mechanisms that seem to have been triggered by EMU.European Monetary Union; european capital markets
European Financial Markets After EMU: A First Assessment
This paper reviews the first evidence on the impact of European Monetary Union on European capital markets, one year after the launch of the single currency. Our assessment of this evidence is very favourable. On almost all counts EMU has either changed the European financial landscape already drastically or has the potential to do so in the future. We argue that this is less due to the well-known direct effects of EMU, such as the elimination of intra-European currency risk, than to a number of indirect consequences through feedback mechanisms that seem to have been triggered by EMU.
La notion du temps Ă l'Ă©cole enfantine
Pour rĂ©sumer en quelques mots ce travail de recherche, je retiendrai la complexitĂ© du thĂšme. En effet, la notion du temps est un thĂšme qui nous pousse tous Ă la rĂ©flexion : Comment le dĂ©finir, et surtout comment lâenseigner ? Voici lâenjeu de ce travail de recherche ; mon but est de comprendre et de mâapproprier un peu plus la notion du temps tout en cherchant Ă comprendre comment nous pouvons lâenseigner Ă des enfants ĂągĂ©s de 4 Ă 6 ans, donc dans le cadre de lâĂ©cole enfantine. Ce travail est basĂ© sur les capacitĂ©s et les compĂ©tences requises des enfants ĂągĂ©s de 4 Ă 6 ans, dans la perspective de leur aider Ă progresser dans la comprĂ©hension et lâappropriation de la notion du temps. Dans ce travail, je vous explique Ă©galement la dĂ©marche que jâai mise en place et je vous fais part des diffĂ©rentes informations que jâai rĂ©coltĂ©es. Ces informations proviennent de sources variĂ©es, une premiĂšre partie des lectures dâouvrages que jâai effectuĂ©es, la seconde partie dĂ©coule des entretiens exploratoires auprĂšs dâenseignantes et de lâexpĂ©rimentation mise en place dans une classe dâĂ©cole enfantine. Finalement, dans le bilan des informations rĂ©coltĂ©es, nous trouvons la rĂ©ponse Ă ma question de recherche
A simple, efficient, and general treatment of the singularities in Hartree-Fock and exact-exchange Kohn-Sham methods for solids
We present a general scheme for treating the integrable singular terms within
exact exchange (EXX) Kohn-Sham or Hartree-Fock (HF) methods for periodic
solids. We show that the singularity corrections for treating these
divergencies depend only on the total number and the positions of k-points and
on the lattice vectors, in particular the unit cell volume, but not on the
particular positions of atoms within the unit cell. The method proposed here to
treat the singularities constitutes a stable, simple to implement, and general
scheme that can be applied to systems with arbitrary lattice parameters within
either the EXX Kohn-Sham or the HF formalism. We apply the singularity
correction to a typical symmetric structure, diamond, and to a more general
structure, trans-polyacetylene. We consider the effect of the singularity
corrections on volume optimisations and k-point convergence. While the
singularity corrections clearly depends on the total number of k-points, it
exhibits a remarkably small dependence upon the choice of the specific
arrangement of the k-points.Comment: 24 pages, 5 Figures, re-submitted to Phys. Rev. B after revision
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