13,938 research outputs found
Conventional Calibration Versus EDF Calibration
In this paper we analyze the impact of using alternative parameter calibration methodologies for general equilibrium models in the context of a particular application. When studying implications of different parameterizations on long-run equilibria for Chile, we find that the impact of free trade agreements on macroeconomic variables of interest is contingent on the choice of methodological approach. Nevertheless, steady state welfare gains due to the treaties are robust to different parameterizations.
Lost: The Crisis Of Jobless and Out Of School Teens and Young Adults In Chicago, Illinois and the U.S.
This report contains compilations and calculations of various employment data for males and females 16 to 24 years old by race/ethnicity from 2005 to 2014, comparing Chicago, Illinois, the U.S. and in some instances, adding Los Angeles and New York. Besides an array of figures and tables, the report contains GIS generated maps that illustrate the relationship between employment data and population distribution by race/ethnicity. A significant contribution of this report is its demonstration that low rates of employment are spatially concentrated in neighborhoods that are also racially segregated. This report clearly highlights that youth employment rates are tied to conditions in neighborhoods and cannot be seen as distinct from what is happening in the neighborhoods themselves. The devastation of unemployment in turn, wreaks havoc on the neighborhood
Prospects for indirect MeV Dark Matter detection with Gamma Rays in light of Cosmic Microwave Background Constraints
The self-annihilation of dark matter particles with mass in the MeV range can
produce gamma rays via prompt or secondary radiation. The annihilation rate for
such light dark matter particles is however tightly constrained by cosmic
microwave background (CMB) data. Here we explore the possibility of discovering
MeV dark matter annihilation with future MeV gamma-ray telescopes taking into
account the latest and future CMB constraints. We study the optimal energy
window as a function of the dominant annihilation final state. We consider both
the (conservative) case of the dwarf spheroidal galaxy Draco and the (more
optimistic) case of the Galactic center. We find that for certain channels,
including those with one or two monochromatic photon(s) and one or two neutral
pion(s), a detectable gamma-ray signal is possible for both targets under
consideration, and compatible with CMB constraints. For other annihilation
channels, however, including all leptonic annihilation channels and two charged
pions, CMB data rule out any significant signal of dark matter annihilation at
future MeV gamma-ray telescopes from dwarf galaxies, but possibly not for the
Galactic center.Comment: 10 pages, 6 figures, version to appear on PR
Long-time anomalous swimmer diffusion in smectic liquid crystals
The dynamics of self-locomotion of active particles in aligned or liquid
crystalline fluids strongly deviates from that in simple isotropic media. We
explore the long-time dynamics of a swimmer moving in a three-dimensional
smectic liquid crystal and find that the mean-square displacement (MSD)
transverse to the director exhibits a distinct logarithmic tail at long times.
The scaling is distinctly different from that in an isotropic or nematic fluid
and hints at the subtle but important role of the director fluctuation spectrum
in governing the long-time motility of active particles. Our findings are based
on a generic hydrodynamic theory and Brownian dynamics computer simulation of a
three-dimensional soft mesogen model.Comment: 12 pages, 2 figure
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