Oligarchic majority rules bring the voice but no vote principle into effect. We prove characterizations of the oligarchic majority rules for both fixed and unrestricted societies and a binary agenda. This is a general class of rules that includes the simple majority rule as well as dictatorships. Suitable sets of axioms identify a subsociety whose members have…
In this talk we revisit common problems of Data Science [1, 2]. Specifically, we focus on the problem of locating a given number of hyperplanes minimizing a globalizing function of the closest distances from a set of points. Following an initial attempt in [3], we propose a general framework for the problem in which general…
Resumen Las alusiones al patrimonio y los negocios generados por la viuda de Fernando VII y reina regente, María Cristina de Borbón, y su segundo esposo, Agustín Fernando Muñoz, son una constante en la historiografía política española y en su día se consideró uno de los mayores escándalos de corrupción de la historia de España….
Abstract: I estimate the effect of being the best in the class} in the early years of schooling on future academic performance. I implement a novel methodology that does not require experimental data. My methodology exploits that some students are the best in the class because better students in the same school are assigned to…
Under spatial product differentiation and product design, we identify conditions for either excessive or insufficient firm entry. We extend previous settings, based on the Salop circular model, to analyze the combined role of positive demand elasticity and endogenous targeted product design. First, we show that, given the number of firms, the equilibrium level of targeted…
Abstract: Las disparidades regionales en los niveles de riesgo social amenazan la cohesión social en España, sin que puedan ser explicadas por las diferencias territoriales en el gasto social per cápita. Se estiman cuatro modelos DEA, uno por cada gran área de la política de gasto social (salud, educación y protección social) y para el…
A bilevel optimization problem consists in an optimization problem in which some of the constraints specify that a subset of variables must be an optimal solution to another optimization problem. This paradigm is particularly appropriate to model competition between agents, a leader and a follower, acting sequentially. In this talk I will first focus the…
Abstract La hipótesis que se explora en el trabajo es la de la insuficiencia del salario masculino en las capitales españolas durante la década de los años veinte, donde, a diferencia de los ámbitos rurales, la subsistencia de las familias era más dependiente del salario. En esencia, el interés está en reconstruir ingresos y gastos…
Abstract: Este estudio trata de cómo, en el seno de la familia, se transmite el placer por la lectura. A partir de los datos de PISA 2009, la última oleada de este programa que trató en profundidad el rendimiento en comprensión lectora de los estudiantes a los 15 años, hemos mostrado que los hijos de…
Abstract: In this paper we study the dynamics of economic growth and tourism evolution for 97 countries during the period 1995-2016. The variables representing economic and tourism growth are growth rates of per capita GDP and international tourism arrivals. Using the concept of economic regime, we introduce a notion of distance between the dynamical paths…
