Time and the Valuation of Environmental Resources

This paper considers the modeling strategies that have been used to incorporate time in revealed and stated preference methods for valuing environmental resources. After reviewing a subset of the economic models for describing time as an input to household production; time in creating habits and persistence in demand for particular services of environmental resources, and time as offering an opportunity for future consumption, the overview suggests that time has been used as a complement in production or consumption to marketed goods in each of these frameworks. The paper suggests two possible alternatives. This structure along with further restrictions to preferences or technology implies that there are other strategies for using revealed preference data to measure the economic value of changes in environmental quality.

No. 23: Labour Migration Trends and Policies in Southern Africa

Since 1990, there have been major changes to longstanding patterns of intra-regional labour migration within the Southern African Development Community (SADC). At the same time, new channels of migration to and from the region have opened. Labour migration is now more voluminous, dynamic and complex than it has ever been. This presents policy-makers with considerable opportunities and challenges. In order to understand the exact nature of these challenges, it is important to have a good grasp of current labour migration characteristics and trends. Unfortunately, reliable, accurate and comprehensive data on labour migration is not available. The quality and currency of data varies considerably from country to country. A regional labour migration observatory would make the future writing of an overview of migration trends a much easier task. The primary objectives of this overview of labour migration trends and policy implications is fourfold: (a) to review recent characteristics and trends in labour migration within and from the SADC region. Official statistics as well as recent survey data are drawn on to generate an overall picture of current characteristics and trends in the region; (b) to highlight some of the critical and urgent issues pertaining to labour migration in the region; (c) to discuss the main features of labour migration strategies and policies and legislative and regulatory frameworks in countries covered by the Southern African Development Community (SADC); and (d) to review the prospects for the freer circulation of migrant labour in the Southern African region. This brief focuses primarily on the period since 1990 and restructuring of labour migration in the wake of the collapse of apartheid, new global migration forces, the end of the wars in Mozambique and Angola and the current economic and political situation in Zimbabwe. Although the brief provides an overview of the region as a whole, the report concentrates on the major labour migration channels in the region (from countries such as Lesotho, Swaziland, Malawi, Mozambique and Zimbabwe to South Africa). The report also considers the nature and implications of new migrant movements to and from SADC

From Banking to International Governance: Fostering Innovation in Stem Cell Research

Stem cell banks are increasingly recognized as an essential resource of biological materials for both basic and translational stem cell research. By providing transnational access to quality controlled and ethically sourced stem cell lines, stem cell banks seek to foster international collaboration and innovation. However, given that national stem cell banks operate under different policy, regulatory and commercial frameworks, the transnational sharing of stem cell materials and data can be complicating. This paper will provide an overview of the most pressing challenges regarding the governance of stem cell banks, and the difficulties in designing regulatory and commercial frameworks that foster stem cell research. Moreover, the paper will shed light on the numerous international initiatives that have arisen to help harmonize and standardize stem cell banking and research processes to overcome such challenges

Interventions for behaviour change and self-management in stroke secondary prevention: protocol for an overview of reviews

Abstract Background Stroke secondary prevention guidelines recommend medication prescription and adherence, active education and behavioural counselling regarding lifestyle risk factors. To impact on recurrent vascular events, positive behaviour/s must be adopted and sustained as a lifestyle choice, requiring theoretically informed behaviour change and self-management interventions. A growing number of systematic reviews have addressed complex interventions in stroke secondary prevention. Differing terminology, inclusion criteria and overlap of studies between reviews makes the mechanism/s that affect positive change difficult to identify or replicate clinically. Adopting a two-phase approach, this overview will firstly comprehensively summarise systematic reviews in this area and secondly identify and synthesise primary studies in these reviews which provide person-centred, theoretically informed interventions for stroke secondary prevention. Methods An overview of reviews will be conducted using a systematic search strategy across the Cochrane Database of Systematic Reviews, PubMed and Epistomonikas. Inclusion criteria: systematic reviews where the population comprises individuals post-stroke or TIA and where data relating to person-centred risk reduction are synthesised for evidence of efficacy when compared to standard care or no intervention. Primary outcomes of interest include mortality, recurrent stroke and other cardiovascular events. In phase 1, two reviewers will independently (1) assess the eligibility of identified reviews for inclusion; (2) rate the quality of included reviews using the ROBIS tool; (3) identify unique primary studies and overlap between reviews; (4) summarise the published evidence supporting person-centred behavioural change and self-management interventions in stroke secondary prevention and (5) identify evidence gaps in this field. In phase 2, two independent reviewers will (1) examine person-centred, primary studies in each review using the Template for Intervention Description and Replication (TIDieR checklist), itemising, where present, theoretical frameworks underpinning interventions; (2) group studies employing theoretically informed interventions by the intervention delivered and by the outcomes reported (3) apply GRADE quality of evidence for each intervention by outcome/s identified from theoretically informed primary studies. Disagreement between reviewers at each process stage will be discussed and a third reviewer consulted. Discussion This overview will comprehensively bring together the best available evidence supporting person-centred, stroke secondary prevention strategies in an accessible format, identifying current knowledge gaps

The Role of Free/Libre and Open Source Software in Learning Health Systems

OBJECTIVE: To give an overview of the role of Free/Libre and Open Source Software (FLOSS) in the context of secondary use of patient data to enable Learning Health Systems (LHSs). METHODS: We conducted an environmental scan of the academic and grey literature utilising the MedFLOSS database of open source systems in healthcare to inform a discussion of the role of open source in developing LHSs that reuse patient data for research and quality improvement. RESULTS: A wide range of FLOSS is identified that contributes to the information technology (IT) infrastructure of LHSs including operating systems, databases, frameworks, interoperability software, and mobile and web apps. The recent literature around the development and use of key clinical data management tools is also reviewed. CONCLUSIONS: FLOSS already plays a critical role in modern health IT infrastructure for the collection, storage, and analysis of patient data. The nature of FLOSS systems to be collaborative, modular, and modifiable may make open source approaches appropriate for building the digital infrastructure for a LHS.</p

Outcomes from collaborative provision audit: frameworks, guidance and formal agreements

The reports on Collaborative provision audits conducted between 2005 and 2007 indicate that, in general, the frameworks established by institutions for the management of quality and academic standards in their collaborative provision are sound and effective. Nevertheless, most reports provided advice on how particular aspects of the frameworks might be improved. The reports describe the various models or types of collaboration undertaken by institutions, and the relationships between these and the quality management arrangements employed. Recommendations in this context focused on the need for clarity in the use of terms and their procedural implications. Particular difficulties were associated with accreditation agreements in a number of institutions. The reports' consideration of formal agreements between awarding and partner institutions suggests several recurring themes, including: the relationship between types of collaboration and the contracted arrangements and responsibilities; the relationship between institutional and programme elements in agreements; arrangements for the review and renewal of agreements; and the need for ratification of agreements prior to the operation of programmes. The guidance provided on frameworks and processes for managing quality and standards in collaborative provision emerged as a widespread strength in awarding institutions and was linked with numerous features of good practice

Simulating fog and edge computing scenarios: an overview and research challenges

The fourth industrial revolution heralds a paradigm shift in how people, processes, things, data and networks communicate and connect with each other. Conventional computing infrastructures are struggling to satisfy dramatic growth in demand from a deluge of connected heterogeneous endpoints located at the edge of networks while, at the same time, meeting quality of service levels. The complexity of computing at the edge makes it increasingly difficult for infrastructure providers to plan for and provision resources to meet this demand. While simulation frameworks are used extensively in the modelling of cloud computing environments in order to test and validate technical solutions, they are at a nascent stage of development and adoption for fog and edge computing. This paper provides an overview of challenges posed by fog and edge computing in relation to simulation