Argentina's labor markets in an era of adjustment

The current economic crisis in Argentina is only partly the result of inappropriate domestic policies to cope with the recent external shocks. Years of inappropriate policies have damaged Argentina's economy. Even if no external shocks had occurred, the country would still have to change the structure of production. Argentina has had trouble sustaining a program of structural adjustment. Its experiences provide policymakers with some lessons in designing a sustainable program to achieve price stability and change the incentive system : a) macroeconomic and trade policies must be consistent; b) labor relations and labor market institutions must be changed including the decentralization of wage bargaining and the elimination of traditional wage policies and general government intervention; c) rigidities and restrictions on labor mobility must be eliminated, leading to less pervasive government intervention in the form of restrictive regulations and spending patterns; and d) public spending must be profoundly changed to reduce social costs during the transition period.Economic Stabilization,Banks&Banking Reform,Municipal Financial Management,Environmental Economics&Policies,Economic Theory&Research

Evolution of networks

We review the recent fast progress in statistical physics of evolving networks. Interest has focused mainly on the structural properties of random complex networks in communications, biology, social sciences and economics. A number of giant artificial networks of such a kind came into existence recently. This opens a wide field for the study of their topology, evolution, and complex processes occurring in them. Such networks possess a rich set of scaling properties. A number of them are scale-free and show striking resilience against random breakdowns. In spite of large sizes of these networks, the distances between most their vertices are short -- a feature known as the ``small-world'' effect. We discuss how growing networks self-organize into scale-free structures and the role of the mechanism of preferential linking. We consider the topological and structural properties of evolving networks, and percolation in these networks. We present a number of models demonstrating the main features of evolving networks and discuss current approaches for their simulation and analytical study. Applications of the general results to particular networks in Nature are discussed. We demonstrate the generic connections of the network growth processes with the general problems of non-equilibrium physics, econophysics, evolutionary biology, etc.Comment: 67 pages, updated, revised, and extended version of review, submitted to Adv. Phy

En la rehabilitación de la arquitectura en adobe incide la huella del objeto valorado desde la perspectiva del patrimonio cultural en el centro antiguo de villavicencio: puntualizando procedimientos

Recientemente se ha empezado a valorar el municipio de Villavicencio como un área con riqueza patrimonial, reconocida como una región de colonización reciente, sin historias o monumentos, se examinó desde sus prácticas culturales, busca hoy la conservación de la arquitectura nativa construida en adobe hallada en el centro antiguo de Villavicencio, permitiendo que su valor permanezca y consolide la memoria colectiva a futuras generaciones. Se parte del estudio de lo construido para rehabilitar, luego de haber documentado las patologías e intervenciones presentes en las edificaciones objeto de estudio, documentar la evolución histórica de los inmuebles, documentar el sistema y técnicas constructivas y los materiales utilizados se llegó a concluir la imperiosa necesidad de proteger estas edificaciones, aplicando la metodología acorde a la alternativa de reforzamiento seleccionada, para ser implementada en las edificaciones del caso de estudio, se identifican y evalúan alternativas de reforzamiento de edificaciones con sistemas de muros en adobe previamente aplicadas por el Grupo GRIME.5.- Patrimonios Urbano, Rural, Industrial y Religioso. Cementerios Patrimoniales. Técnicas de Evaluación, Limpieza, Reparación y Conservación. Intervenciones en construcciones con patologías estructurales y aplicación de refuerzos

Quasi-pinning and entanglement in the lithium isoelectronic series

The Pauli exclusion principle gives an upper bound of 1 on the natural occupation numbers. Recently there has been an intriguing amount of theoretical evidence that there is a plethora of additional generalized Pauli restrictions or (in)equalities, of kinematic nature, satisfied by these numbers. Here for the first time a numerical analysis of the nature of such constraints is effected in real atoms. The inequalities are nearly saturated, or quasi-pinned. For rank-six and rank-seven approximations for lithium, the deviation from saturation is smaller than the lowest occupancy number. For a rank-eight approximation we find well-defined families of saturation conditions.Comment: 22 pages, 6 figures, minor changes, references adde

Uso de cópulas bivariadas para el modelado de índices de renta variable en el periodo 2015 - 2020.

Los mercados de valores de Estados Unidos, Alemania y Japón resultan ser fundamentales en el mercado de capitales moderno, dado que estas economías se encuentran entre las cinco más grandes del planeta y cuentan con sectores financieros vigorosos en cuanto a sus niveles de capitalización bursátil . La estimación de distribuciones marginales vía un modelo ARMA-GARCH y el uso de cópulas t-student permiten concluir que existe un fuerte vínculo entre los ´índices representativos de tales mercados de renta variable, siendo este un resultado totalmente coherente con el grado de globalización que existe en el mercado de capitales moderno.The American, German and Japanese Stock markets are fundamental in the modern capital market given the fact that these economies are in the top five of the largest economies of the world and that they possess a vigorous financial sector. The estimation of univariate marginal distributions through an ARMA-GARCH model and the application of t-student copulas allows to conclude that there is a strong bond between the representative indices of those markets. This result is completely coherent with the degree at which the modern capital markets is globalized and integrated as a single entity.Magister en Matemáticas AplicadasMaestrí

Orbital-Free Quasi-Density Functional Theory

Wigner functions are broadly used to probe non-classical effects in the macroscopic world. Here we develop an orbital-free functional framework to compute the 1-body Wigner quasi-probability for both fermionic and bosonic systems. Since the key variable is a quasi-density, this theory is particularly well suited to circumvent the problem of finding the Pauli potential or approximating the kinetic energy in orbital-free density functional theory. As proof of principle, we find that the universal functional for the building block of optical lattices results from a translation, a contraction, and a rotation of the corresponding functional of the 1-body reduced density matrix, indicating a strong connection between these functional theories. Furthermore, we relate the concepts of Wigner negativity and $v$-representability, and find a manifold of ground states with negative Wigner functions.Comment: 7 pages, 6 figure

The Black Litterman Model: A Non-Normal Approach.

The Black Litterman Model (BLM) is widely used tool for the estimation of the expected excess return of a given portfolio. It belongs to the field of Bayesian Statistics, and, assumptions on the prior and likelihood distributions are made. This work relaxes normality assumption on both distributions, and explores two scenarios, using Gamma and Skew Normal distributions. The posterior distribution is determined up to a constant and then data is sampled through Metropolis Hastings algorithms. A specific exercise is executed and its results are shown the end of the document.Magister en Matemáticas AplicadasMaestrí