A primer of international migration: The Latin American experience and a proposal for a research agenda

Although the phenomenon of international migration has been around for a while, in the last decades there has been a world-wide resurgence of it, which is larger in scale, wider is scope and is frequently accompanied by large flows of monetary remittances. These tendencies have revived the debate in the academic and policy spheres over their potential social and economic consequences. In this paper we develop a ‘Primer’ that presents the ‘state of the art’ in the study of international migration and make special emphasis on how the Latin American experience fits in it. We first present an overview of migration patterns in the region and highlight the importance of the United States as the prime destination for Latin American migrants. We then develop the core of the paper which reviews the different theories that have been proposed in the academic literature for explaining both the determinants of migration and its potential impacts, particularly from the perspective of the source country. In the process, we accentuate the central role played by international remittances. Finally, based on the current knowledge frontier in the subject, we propose a research agenda in order to fill some of the current shortages in the analysis of migration in the region.Migration; Remittances; Latin America

Simultaneous analysis of elastic scattering and transfer/breakup channels for the 6He+208Pb reaction at energies near the Coulomb barrier

The elastic and alpha-production channels for the 6He+208Pb reaction are investigated at energies around the Coulomb barrier (E_{lab}=14, 16, 18, 22, and 27 MeV). The effect of the two-neutron transfer channels on the elastic scattering has been studied within the Coupled-Reaction-Channels (CRC) method. We find that the explicit inclusion of these channels allows a simultaneous description of the elastic data and the inclusive alpha cross sections at backward angles. Three-body Continuum-Discretized Coupled-Channels (CDCC) calculations are found to reproduce the elastic data, but not the transfer/breakup data. The trivially-equivalent local polarization potential (TELP) derived from the CRC and CDCC calculations are found to explain the features found in previous phenomenological optical model calculations for this system.Comment: 7 pages, 6 figures (replaced with updated version

Radiative corrections to MhM_h from three generations of Majorana neutrinos and sneutrinos

In this work we study the radiative corrections to the mass of the lightest Higgs boson of the MSSM from three generations of Majorana neutrinos and sneutrinos. The spectrum of the MSSM is augmented by three right handed neutrinos and their supersymmetric partners. A seesaw mechanism of type I is used to generate the physical neutrino masses and oscillations that we require to be in agreement with present neutrino data. We present a full one-loop computation of these Higgs mass corrections, and analyze in full detail their numerical size in terms of both the MSSM and the new (s)neutrino parameters. A critical discussion on the different possible renormalization schemes and their implications is included.Comment: 42 pages, 39 figures, 1 appendix, version published in AHE

Shape evolution and shape coexistence in Pt isotopes: comparing interacting boson model configuration mixing and Gogny mean-field energy surfaces

The evolution of the total energy surface and the nuclear shape in the isotopic chain $^{172-194}$Pt are studied in the framework of the interacting boson model, including configuration mixing. The results are compared with a self-consistent Hartree-Fock-Bogoliubov calculation using the Gogny-D1S interaction and a good agreement between both approaches shows up. The evolution of the deformation parameters points towards the presence of two different coexisting configurations in the region 176 $\leq$ A $\leq$ 186.Comment: Submitted to PR