Editorial

Technological change is altering the way educators deliver subject content. The phenomenal growth and widespread acceptance of the Internet has seen the creation of the Virtual Learning Environment (VLE) in higher education. For the ease of integration of VLEs in higher education, software companies have provided products such as WebCT and Blackboard. From a pedagogical perspective, new technologies must be evaluated in an effort to establish whether their introduction has had a beneficial impact on learning outcomes. To this end, this investigation examines the attitudes of undergraduate accounting students in relation to a number of design features and attributes of WebCT (e.g. bulletin boards, on-line assessment and chat room) as a VLE. Responses from 292 on-campus undergraduate students provided data which associates four factors with improved student motivation. This study found that student satisfaction with the use of a VLE is significantly associated with the provision of: lecture notes, bulletin board, on-line assessment and other tools (chat and video summaries). The diagrammatic representation of the variables identified in this study provides a useful reference point for those educators contemplating the implementation of a VLE.     

Regional sustainability: How useful are current tools of sustainability assessment at the regional scale?

Sustainability assessment methods are primarily aimed at global, national or state scales. However, modelling sustainability at finer spatial scales, such as the region, is essential for understanding and achieving sustainability. Regions are emerging as an essential focus for sustainability researchers, natural resource managers and strategic planners working to develop and implement sustainability goals. This paper evaluates the effectiveness of current sustainability assessment methods - ecological footprint, wellbeing assessment, ecosystem health assessment, quality of life and natural resource availability - at the regional scale. Each of these assessment methods are tested using South East Queensland (SEQ) as a case study. It was selected because of its ecological and demographic diversity, its combination of coastal and land management issues, and its urban metropolitan and rural farm and non-farm communities. The applicability of each of these methods to regional assessment was examined using an evaluation criteria matrix, which describes the attributes of an effective method and the characteristics that make these methods useful for regional management and building community capacity to progress sustainability. We found that the methods tested failed to effectively measure progress toward sustainability at the regional scale, demonstrating the need for a new method for assessing regional sustainability.     

DID THE NEW ECONOMY VANQUISH THE REGIONAL BUSINESS CYCLE?

The record economic expansion of the 1990s has led many to speculate that the United States is experiencing a New Economy. Along with the belief that strong growth could continue without accelerating inflation, there has been speculation that regional disparities in economic performance are disappearing in the New Economy. The historical patterns of state labor market performance are compared with recent trends to assess whether the 1990s represent a departure from the past. The conclusion is that regional disparities continue to exist. If anything, many of the historical patterns are stronger today than in the 1970s and 1980s.     

Stochastic volatility with leverage: Fast and efficient likelihood inference

This paper is concerned with the Bayesian analysis of stochastic volatility (SV) models with leverage. Specifically, the paper shows how the often used Kim et al. [1998. Stochastic volatility: likelihood inference and comparison with ARCH models. Review of Economic Studies 65, 361–393] method that was developed for SV models without leverage can be extended to models with leverage. The approach relies on the novel idea of approximating the joint distribution of the outcome and volatility innovations by a suitably constructed ten-component mixture of bivariate normal distributions. The resulting posterior distribution is summarized by MCMC methods and the small approximation error in working with the mixture approximation is corrected by a reweighting procedure. The overall procedure is fast and highly efficient. We illustrate the ideas on daily returns of the Tokyo Stock Price Index. Finally, extensions of the method are described for superposition models (where the log-volatility is made up of a linear combination of heterogenous and independent autoregressions) and heavy-tailed error distributions (student and log-normal).     

Output sharing in partnerships as a common pool resource management instrument

Many economic environments are susceptible to either free-riding or overuse. Common pool resources (CPRs) fall in the latter category. Equally sharing the output of a CPR in partnerships introduces a free-riding incentive that may offset overuse. Socially optimal harvesting can be induced by dividing the set of resource users into a number of partnerships in such a way that each resource users’ tendency to over-harvest from the resource is exactly offset by his or her tendency to free-ride on the contributions of others. We conduct a laboratory experiment to assess the performance of this partnership solution by introducing equal-sharing subgroups of size one, four and six into a twelve-person CPR environment. Group assignment is either unchanging throughout a 15 period session or randomly mixed each decision round. Group size significantly affects aggregate effort, while group assignment makes no significant difference. The distribution of total payoffs is more equitable for randomly mixed groups. Implications of our results for voluntary and centralized implementations of the partnership solution are discussed.

创新商品化与六西格玛

有时创新的最难之处就在于突破想象。你的创新活动是否总是停滞于此呢?是否觉得想出好创意后却很难将其付诸实施呢?实际上,所有创新都是一套全方位的解决方案,它们集出色的创意、实施创意的全面计划以及根据计