http://hdl.handle.net/2072/1749 http://www.recercat.net/retrieve/4277 http://hdl.handle.net/2072/1749 Search the Channel s http://www.recercat.net/simple-search http://hdl.handle.net/2072/9954 title: A Model-to-model analysis of the repeated Prisoners' Dilemma: genetic algorithms vs. evolutionary dynamics authors: Vilà, Xavier <br>abstract: We study the properties of the well known Replicator Dynamics when applied to a finitely repeated version of the Prisoners' Dilemma game. We characterize the behavior of such dynamics under strongly simplifying assumptions (i.e. only 3 strategies are available) and show that the basin of attraction of defection shrinks as the number of repetitions increases. After discussing the difficulties involved in trying to relax the 'strongly simplifying assumptions' above, we approach the same model by means of simulations based on genetic algorithms. The resulting simulations describe a behavior of the system very close to the one predicted by the replicator dynamics without imposing any of the assumptions of the analytical model. Our main conclusion is that analytical and computational models are good complements for research in social sciences. Indeed, while on the one hand computational models are extremely useful to extend the scope of the analysis to complex scenar <br> http://hdl.handle.net/2072/9953 title: Optimal feedback control rules sensitive to controlled endogenous risk-aversion authors: Protopopescu, Dan <br>abstract: The objective of this paper is to correct and improve the results obtained by Van der Ploeg (1984a, 1984b) and utilized in the theoretical literature related to feedback stochastic optimal control sensitive to constant exogenous risk-aversion (see, Jacobson, 1973, Karp, 1987 and Whittle, 1981, 1989, 1990, among others) or to the classic context of risk-neutral decision-makers (see, Chow, 1973, 1976a, 1976b, 1977, 1978, 1981, 1993). More realistic and attractive, this new approach is placed in the context of a time-varying endogenous risk-aversion which is under the control of the decision-maker. It has strong qualitative implications on the agent's optimal policy during the entire planning horizon. <br> http://hdl.handle.net/2072/9952 title: PelicanHPC tutorial authors: Creel, Michael <br>abstract: PelicanHPC is a rapid (around 5 minutes, when you know what you're doing) means of setting up a high performance computing (HPC) cluster for parallel computing using MPI. This tutorial gives a basic description of what PelicanHPC does,  addresses how to use the released CD images to set up a HPC cluster, and gives some basic examples of usage. <br> http://hdl.handle.net/2072/9951 title: El Sistema de financiación de las comunidades autónomas de régimen común: un análisis crítico y algunas propuestas de reforma authors: Fuente, Ángel de la; Gundín, María <br>abstract: We identify a number of elements of the current Spanish system of regional financing that do not conform satisfactorily to the principles of equity, autonomy and efficiency that should inspire its design. Our main conclusion is that although the system presents a series of shortcomings that would require an in-depth reform, its basic focus on the equalization of the service provision capacity of all regional governments should be preserved because it is in accordance with the constitutional guarantee of equal rights for all citizens and with notions of horizontal equity that are widely shared in our country. In fact, the main shortcoming of the system is, in our opinion, that it does not fully guarantee such equality in practice. Additional weaknesses of the system are its lack of transparency, the absence of mechanisms to maintain vertical equilibrium across the different levels of the administration and a significant deficit of fiscal autonomy and responsibility on the pa <br>