Análisis comparativo de los diferentes modelos de corrupción en subastas

This paper analyzes the different papers that are framed in corruption, not only in auctions but also in procurements. This survey only discusses corruption in one-dimensional auctions. The division of cases depends on the nature of the corrupt agreement, whether it is exogenous or endogenous.En la presente revisión se analizan los distintos trabajos que existen enmarcados en corrupción, tanto en subastas como en licitaciones. Se analizarán solamente los casos de corrupción en subastas unidimensionales. La división de los casos se hace según el pacto corrupto sea exógeno o endógeno

A novel stochastic method to dispatch microgrids using Monte Carlo scenarios

Stochastic operating strategies have proven to achieve cheaper resource scheduling both in large power systems and microgrids, but suffer from high computational requirements with respect to traditional deterministic approaches; therefore, using stochastic formulations in advanced infra-daily operating strategies is quite challenging, especially in isolated energy systems with limited computational assets. This paper proposes a dispatching methodology for microgrids based on a novel two-stage formulation that decomposes the stochastic problem into several deterministic subproblems, whose solutions are afterwards aggregated by the aggregator using simulations and a cost-based rule. In the first stage, every subproblem is solved, then each optimal dispatching is simulated in the second stage to evaluate the corresponding expected operating cost, which is used by the aggregator to select the final optimal scheduling. When compared to traditional methods for a rural microgrid in Uganda, the proposed approach not only achieves interesting savings in operational costs, up to 5%, but also sharply reduces the computational requirements, even more than 5–100 times with respect to traditional stochastic approaches. The paper also proposes a review and first classification of this kind of methodologies, to highlight the novelties of the approach

Búsqueda empírica y caracterización de contemporaneidad utilizando quiebres estructurales y cambios de régimen

This paper describes a technique to determine the contemporaneity of two economic events. It is also possible to determine some characteristics of the contemporaneity, as a descriptive stage previous to causality analysis and model estimations. As an illustration, a case of contemporaneity between news and volatility in finan- cial markets is shown. The main result of the exercise is a Laffer curve relationshipbetween corruption and volatility given news.El presente trabajo describe una nueva técnica para determinar la contemporaneidad de dos eventos económicos. Luego de ello es posible determinar algunas características de la contemporaneidad, siendo esta metodología un análisis descriptivo previo a considerar causalidad y estimar un modelo. Como ilustración, analizamos un caso de contemporaneidad entre noticias y volatilidad en mercados financieros. El principal resultado es una curva de Laffer para representar la relación entre corrupción y volatilidad dadas las noticias