79,397 research outputs found
Sampling the Variance-Covariance Matrix in the Bayesian Multivariate Probit Model
This paper is concerned with the Bayesian estimation of a Multivariate Probit
model. In particular, this paper provides a method to sample the restricted variancecovariance
matrix directly from its conditional posterior density. The method allows
the application of a standard Gibbs sampling algorithm to sample from the posterior
density of the parameters, and hence it avoids the use of a Metropolis step. The method
uses a decomposition of the Inverted Wishart density and alternative identification
restrictions
On the Chern-Simons topological term at finite temperature
The parity-violating topological term in the effective action for 2+1 massive
fermions is computed at finite temperature in the presence of a constant
background field strength tensor. Gauge invariance of the finite-temperature
effective action is also discussed.Comment: 8 pages, standard LaTe
The Frisch elasticity in the Mercosur countries: A pseudo-panel approach
Copyright @ 2011 Brunel UniversityThis paper provides estimates for the Mercosur countries of the Frisch elasticity —i.e., the elasticity of substitution between
worked hours and real wages holding constant the marginal utility of wealth—. We find a strong heterogeneity, with estimated elasticities ranging from 12.8 in Argentina to -13.1 in Paraguay. Brazil and Uruguay are in between, both with negative values of -1.9 and -1.4, respectively. We argue that the
existence of severe liquidity constraints is the main reason behind the negative estimates found in Brazil, Paraguay and
Uruguay. The heterogeneity of these estimates is the outcome of differences in many relevant economic dimensions —ranging
from sectorial specialization to welfare state provisions and labor market specificities— all of them crucially affecting the socioeconomic situation of individuals. The diversity of Frisch
elasticities calls for the development of a cross-country (rather than a within-country) policy approach, since they crucially
affect the dynamics of the business cycle and business cycle synchronization is a step prior to the design of macroconvergence
policies in the Mercosur context
Detectors and Concepts for sub-100 ps timing with gaseous detectors
We give a short compendium of the main ongoing detectors and concepts capable
of performing accurate sub-100 ps timing at high particle fluxes and on large
areas, through technologies based on gaseous media. We briefly discuss the
state-of-the-art, technological limitations and prospects, and a new bizarre
idea
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