Mitigating shortage and distribution costs in damaged water networks

Recent events have sparked renewed interest in disaster mitigation for public infrastructures. Presidential Decision Directive 63 identifies water distribution as being among the most vital and vulnerable of our large-scale infrastructures. Water distribution networks are vulnerable to threats such as chemical and biological contamination, cyber attacks on computer-based management systems, and physical destruction from acts of nature and intentional attack. This research develops methods for configuring the undamaged portion of the water network to mitigate the consequences of physical destruction. The approach is to find a hydraulically feasible residual network that can be pressurized to meet the demand of a subset of demand sectors. Demand sectors not pressurized then receive water through truck distribution from pressurized sectors. The objective is to minimize weighted water shortage and water truck distribution costs by identifying sectors to pressurize along with an assignment of unpressurized sectors to pressurized sectors for water delivery by truck. The paper develops an optimization model, describes a solution method, and presents computational results for three example networks.     

Signalling,Disclosure And The Implications Of Financial Structure For Uk Corporate R&D ∗

This paper investigates the impact of R&D disclosure and finance variables on the level of R&D expenditures. The question addressed is: what is the impact of changes in disclosure requirements on the relationship between R&D expenditure and the financing of firms? The question is motivated by the possible signalling role that elective disclosure may have had prior to changes in accounting practices to ensure R&D disclosure.     

The determinants of firm diversification in UK quoted companies

This paper examines the role of resource-based and governance factors in determining the boundaries of UK quoted companies, measured by both the probability and intensity of market diversification. Using a panel of over 2000 firms for the period 1988 to 2001 it is found that firm-level heterogeneity and industry characteristics account for the variability in diversification behaviour and that resource-based and governance factors interact in a complex manner not necessarily fully explained by the theoretical literature. The results also indicate that the degree of data aggregation has significant implications for the empirical modelling of market diversification.     

Identifying and characterising price leadership in British supermarkets

Price leadership is a concept that lacks precision. We propose a deliberately narrow, falsifiable, definition then develop it, illustrate its feasibility and test it using the two leading British supermarket chains. We find both firms engaging in leading prices upward over a range of products, with the larger being initially more dominant but the smaller increasing leadership activity to take overall leadership over time. However, more price leadership events are price reductions than price increases, consistently led by the smaller firm. Nevertheless, the increases are of larger monetary amounts than the falls, so average basket price increases over time.     

Public Service Leaders as ‘Change Agents’ – for Whom?

Abstract

This article examines how far senior staff in English educational and health service organizations view themselves as leaders who are ‘change agents’ for government-driven reform and independent change agendas. The contribution of external leadership development provision to shaping these self-perceptions is explored. Special attention is paid to national leadership development bodies with different degrees of formal association with government. Whatever this relationship, such provision and other development support apparently reinforced a strong sense of personal agency (choice of action) associated with being a leader, empowering senior staff to adopt a modestly mediatory stance towards both reform and leadership development provision.     

MNEs and development: a review and reconceptualization

In this paper, we review and critique two prominent theories in the international business and international economics literatures regarding the role of multinational enterprises (MNEs) in host country development: the “spillovers” perspective on the impact of MNE investment in host countries and the liabilities of foreignness (LOF) view that specifies the constraints MNEs must overcome to succeed in local, developing country markets. We then propose an alternative conceptualization of MNE-host country relations in which MNEs and local nongovernmental organizations (NGOs) pursue collaborative relationships that make a positive, collective contribution to host country development and to MNE and NGO strategic goals in ways that neither sector is positioned to do alone.     

Who in Brazil Will Gain from Global Trade Reforms?

The potential impacts of multilateral trade liberalisation on developing countries are the subject of numerous controversies. One particular concern is that Brazil, a major agricultural exporter and a country with one of the world's most unequal income distributions, will reap a substantial share of the potential benefits to developing countries from agricultural trade reform, and that most of those benefits will go to large‐scale commercial farmers rather than to the country's smallholders. This claim is explored via a global general equilibrium model and a national model of Brazil containing multiple agricultural and non‐agricultural households. Brazil is found to account for nearly one‐half of all the benefits to developing countries deriving from global agricultural trade reform. These gains are associated with improvements in the welfare of each group and a lower incidence of poverty. Large‐scale producers gain more than smallholders as they tend to be relatively specialised in export products, but there are important gains to agricultural employees, who are relatively poor, and to urban households, who benefit from the expansion of the agro‐food sector. Overall, there is no discernible impact on income inequality, and no evidence that the gains to commercial farmers occur at the expense of poorer households.     

Contracts and competition: an introduction

Changes in public policy and corporate strategy have enhancedthe role of contracts as mechanisms of economic governance.The understanding that norms, standards and other forms of regulatorymechanism can affect the structure of incentives and the qualityof contractual outcomes has helped to stimulate a wider debateconcerning institutions and economic performance. Among thethemes explored in this Special Issue, which draws on the UKESRC's Contracts and Competition Programme, are the need forinterdisciplinary analysis of economic organisation; the linkbetween contracts and trust; and the complex relationship betweeninstitutional forms and economic outcomes.     

Import Competition, Productivity, and Restructuring in UK Manufacturing

We discuss the literature on the importance of entry and exitfor raising productivity growth. Using micro data for the UKfor a period from 1980 to 2000, we find that the share of productivitygrowth accounted for by entry and exit has increased considerably:from around 25 per cent in the 1980s to around 50 per cent inthe 1990s. We then ask to what extent increased globalization—measuredas sectoral import penetration—might have explained thisand find effects from both globalization and information andcommunication technology.