Suchergebnisse

Cet article examine le schéma méta-historique décrit par le poète et philosophe portugais Antero de Quental dans sa conférence Causas da Decadência dos Povos Peninsulares nos Últimos Três Séculos (1871). L'argument principal est que le schéma antérien de l'histoire péninsulaire, structuré en étapes de « prospérité » (Antiquité tardive et Moyen Âge), de « décadence » (16e-19e siècles) et de « régénération » (l'avenir), peut être compris comme une réinterprétation romantique du plan, des concepts et des images de l'histoire et de la prophétie bibliques. Cette étude vise à contribuer aux discussions sur les présupposés théologiques de la conscience historique moderne.

Lithium has become a key element of technologies in the second decade of the 21st century. Its applications and use have grown exponentially. Similarly, research related to the element in both geological, metallogenic, chemical and industrial aspects. Globally, lithium was first identified in Sweden in 1817 by Johan August Arfvedson. Argentine chemist and geologist Luciano R. Catalano drew attention to its presence in the Puna salars in the 1920s. Intensive studies begin in the decade of 1970 and 1980 where they participate the National University of Salta (UNSa), the National Commission of Space Investigations (CNIE) and the General Direction of Military Fabrications (DGFM). After an unsuccessful attempt at exploitation in the salar del Rincón, they bear fruit with the first project underway at the salar del Hombre Muerto (Fénix Project, FMC) in the early 1990s. In this work a brief synthesis of the history of the geological and chemical investigations around lithium and the men who carried it out is made. ; El litio se ha convertido en un elemento clave de las tecnologías en la segunda década del siglo XXI. Sus aplicaciones y su uso han crecido exponencialmente. En igual sentido las investigaciones relacionadas con el elemento tanto en los aspectos geológicos, metalogénicos, químicos e industriales. En el ámbito mundial el litio fue identificado por primera vez en Suecia por Johan August Arfvedson en 1817. El químico y geólogo argentino Luciano R. Catalano llamó la atención sobre su presencia en los salares puneños en la década de 1920. Los estudios intensivos comienzan en la década de 1970 y 1980 donde participan la Universidad Nacional de Salta, la Comisión Nacional de Investigaciones Espaciales y la Dirección General de Fabricaciones Militares. Luego de un intento fallido de explotación en el salar del Rincón, dan su fruto con el primer proyecto en marcha en el salar del Hombre Muerto a comienzo de los noventa. En este trabajo se realiza una breve síntesis de la historia de las investigaciones geológicas y químicas en torno al litio y de los hombres que la llevaron a cabo.

In a symmetric information voting model, an individual (politician) can influence voters' choices by strategically designing a policy experiment (public signal). We characterize the politician's optimal experiment. With a nonunanimous voting rule, she exploits voters' heterogeneity by designing an experiment with realizations targeting different winning coalitions. Consequently, under a simple-majority rule, a majority of voters might be strictly worse off due to the politician's influence. We characterize voters' preferences over electoral rules and provide conditions for a majority of voters to prefer a supermajority (or unanimity) voting rule, in order to induce the politician to supply a more informative experiment. (JEL D72, D83)

We analyze a cheap talk game with partial commitment by the principal. We first treat the principal's commitment power as exogenous and then endogenize it in an infinitely repeated game. We characterize optimal decision making for any commitment power and show when it takes the form of threshold delegation—in which case the agent can make any decision below a threshold—and centralization—in which case the agent has no discretion. For small biases, threshold delegation is optimal for any smooth distribution. Outsourcing can only be optimal if the principal's commitment power is sufficiently small.