伦敦交通拥挤的代价

本文通过描述伦敦交通拥挤收费制的起源以及现实中如何克服理论和实践层面的两难实施过程,对道路收费所引致的各种效应进行了论证.作者认为伦敦交通拥挤收费制的引入,应该归功于经济学的贡献,道路定价行动在克服交通拥挤的外部性上,不过是一种应对公众和政治利益诉求的适宜性政策回应.     

Back to literacy

One of the seminal works in the development of British cultural studies was Richard Hoggart's The Uses of Literacy , in which he presents a vision of working class communities in the 40 years since the First World War. To do this he drew particularly on his experiences of Hunslet in South Leeds. In this paper we revisit South Leeds 40 years on to examine continuities and changes in the community as evidenced through people's leisure and compare this with Hoggart's analysis. To do this we have drawn on census and other official statistics and our own observation and interviews in the field. In order to interpret today's communities in South Leeds we make use of theoretical developments in the interim. We suggest that in what Bauman (1997) refers to as ‘two nations society mark two’ people try to reinvent community and it is through leisure in particular that this is evidenced. We therefore conclude that any attempt to understand ‘community’ at the millennium must place leisure centre stage.     

Weekly scheduling models for traveling therapists

This paper presents a series of models that can be used to find weekly schedules for therapists who provide ongoing treatment to patients throughout a geographical region. In all cases, patient-appointment times and visit days are known prior to the beginning of the planning horizon. Variations in the models include single vs. multiple home bases, homogeneous vs. heterogeneous therapists, lunch break requirements, and a nonlinear cost structure for mileage reimbursement and overtime. The single home base and homogeneous therapist cases proved to be easy to solve and so were not thoroughly investigated. This left two cases of interest: the first included only lunch breaks while the second added nonlinear overtime and mileage reimbursement costs. For the first case, 40 data sets were solved, each consisting of either 15 or 20 therapists and between roughly 300 and 540 patient visits over five days. For each instance, we were able to obtain the minimum cost of providing residential healthcare services using a commercial solver. The results showed that CPU time increases more rapidly than total cost as the total number of visits grows. For the second case, which was much more difficult, it was necessary to develop heuristics to find good solutions quickly. Results for 5- through 20-therapist instances are presented and compared to the linear programming relaxation lower bounds. In the first of two parametric analyses, the tradeoff between the number of therapists on staff and the cost of providing service was examined. In the second, a similar tradeoff was explored between cost can the number of home bases used by the therapists.     

Offshore Outsourcing: Implications for International Business and Strategic Management Theory and Practice

abstract    In this essay, I discuss the implications of the debate over offshoring for our collective understanding of international business and management theories. I review several core theories in international business expansion and management strategy to assess which elements of these theories may need to be re-specified in light of the offshoring phenomenon and which aspects remain relevant. I then present normative implications and recommendations for public policy and corporate strategy, drawing from emerging insights regarding the global responsibilities of corporations. I suggest that international labour and environmental standards and corporate codes of conduct could mitigate some of the most intense concerns raised about offshoring but conclude that offshoring is likely to present challenges to societies, corporations, and stakeholders for many decades.     

Might randomization in queue discipline be useful when waiting cost is a concave function of waiting time?

This paper suggests that introducing randomization in queue discipline might be welfare enhancing in certain queues for which the cost of waiting is a concave function of waiting time. Concavity can make increased variability in waiting times good not bad for aggregate customer welfare. Such concavity may occur if the costs of waiting asymptotically approach some maximum or if the customer incurs a fixed cost if there is any wait at all. As examples, cost might asymptotically approach a maximum for patients seeking organ transplants who will not live beyond a certain threshold time, and fixed costs could pertain for knowledge workers seeking a piece of information that is required to proceed with their current task, so any delay creates a “set up charge” associated with switching tasks.     

REVERSE REGRESSIONS AND LONG‐HORIZON FORECASTING

Long‐horizon predictive regressions in finance pose formidable econometric problems when estimated using available sample sizes. Hodrick in 1992 proposed a remedy that is based on running a reverse regression of short‐horizon returns on the long‐run mean of the predictor. Unfortunately, this only allows the null of no predictability to be tested, and assumes stationary regressors. In this paper, we revisit long‐horizon forecasting from reverse regressions, and argue that reverse regression methods avoid serious size distortions in long‐horizon predictive regressions, even when there is some predictability and/or near unit roots. Meanwhile, the reverse regression methodology has the practical advantage of being easily applicable when there are many predictors. We apply these methods to forecasting excess bond returns using the term structure of forward rates, and find that there is indeed some return forecastability. However, confidence intervals for the coefficients of the predictive regressions are about twice as wide as those obtained with the conventional approach to inference. We also include an application to forecasting excess stock returns. Copyright © 2011 John Wiley & Sons, Ltd.     

The future of Facebook fundraising

• Facebook is the world's largest social network, and charities are keen to create communities and engage with supporters there; yet few are using any of Facebook's tools to raise money effectively. On the basis of data from Facebook and JustGiving, we will learn how to prompt donors to share their donations, the pound value of a Facebook share, and how to generate the best value from shares. We will also reveal Facebook's best practices for community building, explore the trend for Timeline integration and underline the importance of mobile in the future for Facebook fundraising.

Copyright © 2013 John Wiley & Sons, Ltd.     

Beyond survival: the implementation of new forms of work organization in the UK and German steel industries

This paper outlines and analyses the major changes in work-force organization that have been introduced by British and German steel producers in the past decade, against a backcloth of retrenchment in the industry, new product development and technological change. Including multiskilling, a reduction in demarcation and team–working, these changes have had a major effect upon the composition of the work–force and the nature of work undertaken at the shopfloor level.

While these changes have had a common broad trajectory, they have been introduced at a different pace and in different forms. The contrasts are provided not only at the international level, but between plants in the same countries. The paper further outlines the response of trade unions to these changes and the implications for industrial relations at the shopfloor level.