Non-thermal radio emission from Saturn

Direct, strong evidence for non-thermal radio emission from Saturn exists in the hectometric data observed by Imp 6. The planet has been tentatively identified as a decametric source, but the most sensitive and most recent data fail to confirm this. At metric or decimetric wavelengths Saturn has no non-thermal emission like Jupiter's synchrotron sources. Finally, a comparative study of Earth and Jupiter radio emissions suggests lightning discharges

Teaching mathematical modelling: demonstrating enrichment and elaboration

This paper uses a series of models to illustrate one of the fundamental processes of model building – that of enrichment and elaboration. The paper describes how a problem context is given which allows a series of models to be developed from a simple initial model using a queuing theory framework. The process encourages students to think about the assumptions being made within their models and how these assumptions may be relaxed to produce an enriched model

Greenhouse abatement policy: insights from the G-cubed multi-country model

The third meeting of the Conference of the Parties of the Framework Convention on Climate Change held in Japan last December was a lost opportunity to set a realistic policy framework for addressing climate change in the coming decades. A number of countries proposed targets for greenhouse emissions, to be reached by a target date. The outcome was a range of different targets for each country. Analysis with the G‐cubed multi‐country model suggests that fixed targets are a costly way to address climate change. The extent of potential cost suggests the agreement will eventually fail. A better way to address climate change is to focus on uniformity in policy instruments that deliver differentiated outcomes rather than focus on differentiated policy settings.Resource /Energy Economics and Policy,

The effects of fiscal consolidation in the OECD

Despite the current recession in many parts of the OECD, fiscal consolidation is likely in many OECD economies in the 1990s. The author asks: is fiscal consolidation in the OECD in a period of low growth a recipe for global stagnation? In particular, what effects are likely in developing countries? The author starts with an overview of cuts in the U.S. fiscal deficit proposed by the Clinton administration and the extent to which European governments must cut fiscal deficits between now and 1997 to satisfy deficit targets in the Maastricht Treaty. How changes in fiscal policy are transmitted within an economy and between that economy and the rest of the world depends on whether those changes lead to permanent or temporary changes in government saving; whether they are implemented through government spending or taxes; and whether the taxes fall on households or firms. The main channels of transmission are through changes in: agents'expectations about future taxes, interest rates, exchange rates, and economic activity. The author uses the MSG2 multicountry models to quantify the ramifications of those changes. He concludes, among other things, that fiscal contraction in the OECD will probably lead to slower growth over the next several years. But the current and likely paths of fiscal policy are such that deficit reduction programs may have stimulating effect in the short run, as long as future fiscal contraction is credible. And fiscal deficit reduction will probably increase long-run output in the OECD through its effects on savings and investment. Finally, growth in the developing countries (at least total growth) may not be impaired at all by fiscal consolidationin the OECD. The negative effects of fiscal contraction will occur through lower net exports of non-OECD economies. For developing countries with open capital markets, the initial reduction in demand through lower exports can be offset by the reduction in interest rates following an inflow of capital from the countries with contracting fiscal policy. A significant decline in real global interest rates is likely to increase growth in developing countries that are debt-constrained, either directly (through private capital inflows) or indirectly (by relaxing the balance of payments constraint, allowing more resources to be channeled to domestic investment needs).Economic Theory&Research,Economic Stabilization,Environmental Economics&Policies,Banks&Banking Reform,Macroeconomic Management

Wakefield Area Working Evaluation Framework - Literature Review

The Wakefield Metropolitan District Council (MDC) Area Working programme offers a radical and innovative approach to service improvement and redesign with the aim of better meeting community needs and addressing inequalities. Community participation is a core component of the Wakefield model, which is underpinned by the wider goals of encouraging active citizenship and community empowerment. There is an acknowledged need to evidence whether the Area Working approach leads to improved services, to what extent there is meaningful community engagement and ultimately to assess whether it makes a difference to people in their neighbourhoods. This literature review addresses a range of key questions that will usefully inform the development of an evaluation framework in relation to the deployment of Area Working within Wakefield. The aims of the literature review were to scope existing models of evaluation used to assess the deployment and impact of Area Working and to identify potential evaluation frameworks and benchmark indicators. A systematic literature search was undertaken to identify published and grey literature on Area Working and similar programmes and relevant literature was reviewed. This search was supplemented by key literature identified through previous research. This brief report presents a summary of findings and makes some recommendations for the development of an evaluation framework for Wakefield Area Working Programme

Climate Policy and Uncertainty: The Roles of Adaptation versus Mitigation

Climate Policy and Uncertainty: The Roles of Adaptation versus Mitigationclimate change,uncertainty, policy

Estimates of the Costs of Kyoto-Marrakesh versus the McKibbin-Wilcoxen Blueprint

In this paper we update our earlier estimates of the cost of the Kyoto Protocol using the G-Cubed model, taking into account the new sink allowances from recent negotiations as well as allowing for multiple gases and new land clearing estimates. Rather than comparing this to the original Kyoto Protocol as other studies have done, we compare the estimates from the current Kyoto Protocol to a realistic alternative to the Kyoto Protocol outlined by McKibbin and Wilcoxen ( 1197a, 1997b, 2002). A key part of the comparison between the two alternatives is not to predict exactly what the outcome for emissions reduction might be at a future date under each approach. What we want to focus on is the importance of the inherent uncertainty about the future that should be at the heart of the design of a suatainable climate policy. To show how important uncertainty is to the design of the climate policies, we take two alternative plausible assumptions about a single aspect of the future predictions and compare the two regimes under these alternative assumptions. Since climate change is all about policy making under uncertainty it is important in comparing regimes to explore how the regimes handle aspects of uncertainty as well as the average performance of the regimes. This comparison illustrates a fundamental difference between the Kyoto Protocol and the Blueprint.climate change, Kyoto, blueprint, uncertainty, policy