Family-Friendly Work Practices in Britain: Availability and Awareness.

We use linked data on over 20,000 individuals and almost 1,500 workplaces from the Workplace Employee Relations Survey 1998 to analyze the perceived and actual availability of six major family-friendly work practices amongst British employees. We find a low base rate of actual availability, a lower rate of perceived availability, and evidence that accurate awareness of availability is further limited. We identify a range of individual worker and workplaces characteristics that are associated with greater perceived availability and typically also to awareness.

Trade Unions and Family-Friendly Policies in Britian.

This paper uses linked data on over 1,500 workplaces and 20,000 individuals from the 1998 British Workplace Employee Relations Survey to analyze the relationship between labor unions and the availability of six employer-provided family-friendly policies. Unions appear to help with work-family issues by increasing the availability of parental leave and job sharing options through a combination of negotiating for additional benefits and providing better information about existing policies. There is also a negative association between union membership and the availability of working at home options and, for parents of young children, child care subsidies.

Trade Unions and Family Friendly Policies in Britain

This paper uses linked data on over 1,500 workplaces and 20,000 individuals from the 1998 British Workplace Employee Relations Survey to analyze the relationship between labor unions and the availability of six employer-provided family-friendly policies. Unions appear to help with work-family issues by increasing the availability of parental leave and job sharing options through a combination of negotiating for additional benefits and providing better information about existing policies. There is also a negative association between union membership and the availability of working at home options and, for parents of young children, childcare subsidies.

Magnetohydrostatic equilibrium. I: Three-dimensional open magnetic flux tube in the stratified solar atmosphere

A single open magnetic flux tube spanning the solar photosphere (solar radius R) and the lower corona (R + 10 Mm) is modelled in magnetohydrostatic equilibrium within a realistic stratified atmosphere subject to solar gravity. Such flux tubes are observed to remain relatively stable for up to a day or more, and it is our aim to apply the model as the background condition for numerical studies of energy transport mechanisms from the surface to the corona. We solve analytically an axially symmetric 3D structure for the model, with magnetic field strength, plasma density, pressure and temperature all consistent with observational and theoretical estimates. The self similar construction ensures the magnetic field is divergence free. The equation of pressure balance for this particular set of flux tubes can be integrated analytically to find the pressure and density corrections required to preserve the magnetohydrostatic equilibrium. The model includes a number of free parameters, which makes the solution applicable to a variety of other physical problems and it may therefore be of more general interest.Comment: 9 pages, 8 figure

Optimal Control of Spreading Biological Invasions: For How Long Should We Apply the Brake?

Identifying the optimal switching point between different invasive alien species (IAS) management policies is a very complex task and policy makers are in need of modelling tools to assist them. In this paper we develop an optimal control bioeconomic model to estimate the type of optimal policy and switching point of control efforts against a spreading IAS. We apply the models to the case study of Colorado potato beetle in the UK. The results demonstrate that eradication is optimal for small initial sizes of invasion at discovery. High capacity of the agency to reduce spread velocity for several years leads to smaller total overall costs of invasion and makes eradication optimal for larger sizes of initial invasion. In many cases, it is optimal to switch from control to acceptance within the time horizon. The switching point depends on the capacity of the agency, initial size of invasion, spread velocity of the IAS and the ratio of unit cost of damage and removal. We encourage the integration of the dispersal patterns of the invader and the geometry of the invasion in the theoretical development of the economics of IAS invasion management.barrier zone, biosecurity, dynamic optimization, eradication, Leptinotarsa decemlineata, pest risk analysis, reaction-diffusion., Risk and Uncertainty, Q1, Q28, Q57,

Who Benefits from a Minimum Wage Increase?

This paper addresses the question of how a minimum wage increase affects the wages of low-wage workers. Most studies assume that there is a simple mechanical increase in the wage for workers earning a wage between the old and the new minimum wage, with some studies allowing for spillovers to workers with wages just above this range. Rather than assume that the wages of these workers would have remained constant, this paper estimates how a minimum wage increase impacts a low-wage worker’s wage relative to the wage the worker would have if there had been no minimum wage increase. The method allows for the effect to depend not only on the initial wage of the worker, but also nonlinearly on the size of the minimum wage increase. Using Current Population Survey data from 2005 to 2008, a period with a large number of U.S. state-level minimum wage increases, this paper finds that low-wage workers who experience a small increase in the minimum wage tend to have lower wage growth than if there had been no minimum wage increase. A large increase to the minimum wage increases the wages of not only those workers who previously earned less than the new minimum wage, but also spill over to workers with moderately higher wages. Finally, this paper finds little evidence of heterogeneity in the effect by age, gender, income, and race

Notes on Euclidean Wilson loops and Riemann Theta functions

The AdS/CFT correspondence relates Wilson loops in N=4 SYM theory to minimal area surfaces in AdS5 space. In this paper we consider the case of Euclidean flat Wilson loops which are related to minimal area surfaces in Euclidean AdS3 space. Using known mathematical results for such minimal area surfaces we describe an infinite parameter family of analytic solutions for closed Wilson loops. The solutions are given in terms of Riemann theta functions and the validity of the equations of motion is proven based on the trisecant identity. The world-sheet has the topology of a disk and the renormalized area is written as a finite, one-dimensional contour integral over the world-sheet boundary. An example is discussed in detail with plots of the corresponding surfaces. Further, for each Wilson loops we explicitly construct a one parameter family of deformations that preserve the area. The parameter is the so called spectral parameter. Finally, for genus three we find a map between these Wilson loops and closed curves inside the Riemann surface.Comment: 35 pages, 7 figures, pdflatex. V2: References added. Typos corrected. Some points clarifie

Open letter to Prime Minister David Cameron on food poverty in the UK

There is a worrying gap in health circumstances and outcomes between rich and poor people in the UK. Complex though the reasons for this inequality are, the reality is that many hardworking families in the UK are living in poverty and do not have enough income for a decent diet. UK food prices have risen by 12% in real terms since 2007, returning the cost of food relative to other goods to that in the 1990s

Enhancing Performance-Based Regulation: Lessons from New Zealand's Building Control System

Performance-based regulation establishes mandatory goals rather than enforcing prescriptive standards. Performance-based regulation has become popular over the past two decades as an alternative to prescriptive regulation, as it holds out the promise of simultaneously achieving health, safety and environmental outcomes while facilitating innovation and reducing regulatory costs. In the early 1990s New Zealand adopted a performance-based building control regime. This demonstrably failed and was replaced in 2004 with a new regime, still performance-based but more conservative. Using legal determinations, adjudications and court cases, and reviews of the failures, contributing factors have been identified. An assessment has been made of the extent to which these factors can be attributed to the performance philosophy and features of the regime. Strategies to addresses the weaknesses of performance-based regulation have been explored. The change from a standards-based regulatory regime, where technology shifts are on the margin and occur through a process of incremental trial-and-error, to a performance-based regime, displaced traditional institutions for aggregating knowledge required for risk-based decision-making. At the same time, the new performance-based regime was permissive of greater technology shifts, which demands more of decision-makers who are operating in an environment of inevitable uncertainty. The significance of the regime change was not well understood and new institutions did not evolve. Reverting to traditional institutions is not an option as they are inherently conservative and therefore innovation as one of the normative benefits of performance-based regulation is likely to be constrained. New institutions are required to aggregate knowledge, but also permit decisions that enable the technology threshold to be pushed out in situations where it is not possible to measure accurately how a novel technology will perform in all of the circumstances of its use, and failure in the field is a possibility. This requires knowledge that is both technical and evaluative. Technical knowledge is more than science, but increasingly knowledge in other domains such as psychology, economics, and both domestic and international law. Evaluative knowledge is that which is required to assess risks and consequences. This study explores two strategies for resolving the challenges of decision-making in a permissive performance-based regulatory environment: improving the predicative capability of decision-making systems through the better application of the intuitive judgment associated with expertise and wisdom, and treating novel technologies as explicit experiments. Both strategies show promise, but may be difficult to implement. If the conditions for materially pushing out the thresholds of technology while managing the risks cannot be met, it may be necessary to revert to incremental trial-and-error in high-risk areas. This does not preclude innovation, but it will be at a slower rate

Ash dieback and other tree pests and pathogens:dispersed risk events and the Social Amplification of Risk Framework

It is widely acknowledged within the risk literature that the mass media play a pivotal role in shaping information about risk events for audiences. Whilst some risk events reflect occurrences specific to particular times and locations, other risk events are more difficult to temporally and spatially situate as they are dispersed across years or months and are not constrained to particular geographic locations. Studies examining the relationship between the social amplification or attenuation of risks and their framing in the media have tended to focus on the former type of event. In this paper we explore the social amplification of risk in relation to ash dieback disease (Hymenoscyphus fraxineus), a tree health issue that attracted intense media attention in the UK in 2012, and characterise what we designate as a dispersed risk event. Drawing on the influential Social Amplification of Risk Framework (SARF), we present a frame analysis of UK national newspaper articles to assess the connection between media coverage of dieback and risk amplification, and the extent to which dieback coverage drew on other tree health issues and objects of media attention. Focusing particularly on the blame frame around dieback, the paper considers the implications of conceptualising dispersed risk events for the SARF and its amplification metaphor. Moreover, given that risk events such as dieback are often associated with policy shifts, we suggest that there is value for risk communicators and policy makers in broadening their focus to incorporate more of the ‘history’ of risk events in order to anticipate likely anchors of public and media attention