38,959 research outputs found
Peer assessment of research: how many publications per staff?
The UK's higher education funding councils have proposed reducing the number of submitted outputs from four to three in the forthcoming Research Excellence Framework to reduce the burden on panel members. This reduction is considered to be sufficient for panels to form a robust view of the achievements of individuals and their departments. The key issue is whether the subject panels would have sufficient information to judge the quality of research at departmental level with details of only three outputs per staff. Two journal quality indicators are used in this note to test the assumption that three publications is likely to be as useful to the panels as four to measure research quality in three cognate units of assessment (business & management, economics & econometrics and accounting & finance). In fact, the results indicate that two publications would be sufficient, thereby providing more time for a careful assessment of submitted outputs
The labor supply effect of in-kind transfers
We estimate a model of labor supply and participation in multiple programs for UK lone mothers which exploits a reform of in-work transfers. Cash entitlements increased but eligibility to in-kind child nutrition programs was lost. We find that in-work cash and in-work in-kind transfers both have large positive labor supply effects. There is, however, a utility loss from program participation which is estimated to be larger for cash than for child nutrition. This implies that the partial cash out of the in-kind benefits reduced labor supply.
The Dummies Guide' to Lottery Design.
This paper outlines the issues relevant to the operation of lottery games. We consider how such games should be designed, what a portfolio of games might look like, how the operator should be regulated, how spending on lottery games should be taxed, and what considerations are relevant to the use of the revenue from such games.LOTTERY ; GAMES ; MONEY ; TAXATION
Housing Subsidies and Work Incentives in Great Britain.
The relationship between housing costs, wages and transfer programmes is complex and yet plays an important part in determining the incentive to work for individuals in low income or high housing cost households. While it is true that many individuals who are in these categories are out of the labour force (retired, sick and disabled), there are many who are not and whose incentive to seek work, or to work harder if already in work, could be modified by directly changing the rent levels they face or indirectly via changes to the structure of programmes designed to subsidize housing for the poor. Here we estimate a static discrete choice labour supply model which allows for housing benefit programme participation. We use samples of 42491 married women and 13340 unmarried women drawn from Great Britain Family Resources Surveys 1994/5-97/8. We find that women are quite responsive to labour supply incentives, housing benefit income has similar incentive effects to earned income which suggests any "stigma" is small. Our analysis is complemented by simulating housing benefit and direct rent subsidy reforms.LABOUR ; HOUSING ; COSTS
Workshop on Magmatic Processes of Early Planetary Crusts: Magma Oceans and Stratiform Layered Intrusions
The significance of the lunar highland pristine cumulate samples were reevaluated with the aid of the additional insights provided by geologically constrained terrestrial investigations. This exercise involved a review of the state of knowledge about terrestrial and lunar cumulate rocks as well as an enumeration and reevaluation of the processes hypothesized to have been responsible for their formation, both classically and at present
A low pre-infall mass for the Carina dwarf galaxy from disequilibrium modelling
Dark matter only simulations of galaxy formation predict many more subhalos
around a Milky Way like galaxy than the number of observed satellites. Proposed
solutions require the satellites to inhabit dark matter halos with masses
between one to ten billion solar masses at the time they fell into the Milky
Way. Here we use a modelling approach, independent of cosmological simulations,
to obtain a preinfall mass of 360 (+380,-230) million solar masses for one of
the Milky Way's satellites: Carina. This determination of a low halo mass for
Carina can be accommodated within the standard model only if galaxy formation
becomes stochastic in halos below ten billion solar masses. Otherwise Carina,
the eighth most luminous Milky Way dwarf, would be expected to inhabit a
significantly more massive halo. The implication of this is that a population
of "dark dwarfs" should orbit the Milky Way: halos devoid of stars and yet more
massive than many of their visible counterparts.Comment: 5 pages, 3 figures, 1 table, and supplementary material availabl
The case for a cold dark matter cusp in Draco
We use a new mass modelling method, GravSphere, to measure the central dark
matter density profile of the Draco dwarf spheroidal galaxy. Draco's star
formation shut down long ago, making it a prime candidate for hosting a
'pristine' dark matter cusp, unaffected by stellar feedback during galaxy
formation. We first test GravSphere on a suite of tidally stripped mock
'Draco'-like dwarfs. We show that we are able to correctly infer the dark
matter density profile of both cusped and cored mocks within our 95% confidence
intervals. While we obtain only a weak inference on the logarithmic slope of
these density profiles, we are able to obtain a robust inference of the
amplitude of the inner dark matter density at 150pc, . We show that, combined with constraints on the density profile at larger
radii, this is sufficient to distinguish a Cold Dark Matter
(CDM) cusp that has from alternative dark matter models
that have lower inner densities. We then apply GravSphere to the real Draco
data. We find that Draco has an inner dark matter density of , consistent with a CDM cusp. Using a velocity independent
SIDM model, calibrated on SIDM cosmological simulations, we show that
Draco's high central density gives an upper bound on the SIDM cross section of
at 99% confidence. We conclude that
the inner density of nearby dwarf galaxies like Draco provides a new and
competitive probe of dark matter models.Comment: 19 pages, 11 Figures. Final version accepted for publication in MNRA
Behavior of the sodium and hydroxyl nighttime emissions during a stratospheric warming
The behavior of the sodium and hydroxyl nighttime emissions during a stratospheric warming has been studied principally by use of data from the airglow photometers on the OGO-4 satellite. It was found that during the late stages of a major warming, both emissions increase appreciably, with the sodium emission returning to normal levels prior to the decrease in hydroxyl emission. The emission behaviors are attributed to temperature and density variations from 70 to 94 km, and a one-dimensional hydrostatic model for that altitude range is used to calculate the effects on the emissions and on the mesospheric ozone densities
- âŠ