3,155 research outputs found
Dual frequency receiver system for Mariner 1967 to Venus Final engineering report
Dual frequency receiver system for inclusion in Mariner 1967 spacecraft payload for use in measuring Venusian ionosphere and atmosphere by radio occultatio
Fluid model for a network operating under a fair bandwidth-sharing policy
We consider a model of Internet congestion control that represents the
randomly varying number of flows present in a network where bandwidth is shared
fairly between document transfers. We study critical fluid models obtained as
formal limits under law of large numbers scalings when the average load on at
least one resource is equal to its capacity. We establish convergence to
equilibria for fluid models and identify the invariant manifold.
The form of the invariant manifold gives insight into the phenomenon of
entrainment whereby congestion at some resources may prevent other resources
from working at their full capacity
Endogenous Labour Flow Networks
In the last decade, the study of labour dynamics has led to the introduction
of labour flow networks (LFNs) as a way to conceptualise job-to-job
transitions, and to the development of mathematical models to explore the
dynamics of these networked flows. To date, LFN models have relied upon an
assumption of static network structure. However, as recent events (increasing
automation in the workplace, the COVID-19 pandemic, a surge in the demand for
programming skills, etc.) have shown, we are experiencing drastic shifts to the
job landscape that are altering the ways individuals navigate the labour
market. Here we develop a novel model that emerges LFNs from agent-level
behaviour, removing the necessity of assuming that future job-to-job flows will
be along the same paths where they have been historically observed. This model,
informed by microdata for the United Kingdom, generates empirical LFNs with a
high level of accuracy. We use the model to explore how shocks impacting the
underlying distributions of jobs and wages alter the topology of the LFN. This
framework represents a crucial step towards the development of models that can
answer questions about the future of work in an ever-changing world
Information Content of DSGE Forecasts
This paper examines the question whether information is contained in forecasts from DSGE models beyond that contained in lagged values, which are extensively used in the models. Four sets of forecasts are examined. The results are encouraging for DSGE forecasts of real GDP. The results suggest that there is information in the DSGE forecasts not contained in forecasts based only on lagged values and that there is no information in the lagged-value forecasts not contained in the DSGE forecasts. The opposite is true for forecasts of the GDP deflator
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