Data Available for Evaluating the Risks and Benefits of MTBE and Ethanol as Alternative Fuel Oxygenates

The wide-scale use of methyl tertiary butyl ether (MTBE) in gasoline has resulted in substantial public controversy and action to ban or control its use due to perceived impacts on water quality. Because oxygenates are still required under federal law, considerable research has focused on ethanol as a substitute for MTBE. In this article, we summarize the currently available literature on the air and water quality risks and benefits of MTBE versus ethanol as alternative fuel oxygenates. We find that MTBE-fuel blends are likely to have substantial air quality benefits; ethanol-fuel blends appear to offer similar benefits, but these may be at least partially negated because of ethanol's propensity to increase emissions and ambient concentrations of some air contaminants. Releases of gasoline containing either MTBE or ethanol could have an impact on some drinking water sources, although the impacts associated with MTBE tend to relate to aesthetics (i.e., taste and odor), whereas the impacts associated with ethanol generally relate to health risk (i.e., greater exposure to gasoline constituents such as benzene). It is likely that these water quality impacts will be outweighed by the air quality benefits associated with MTBE and perhaps ethanol use, which affect a much larger population. A lack of data on environmental exposures and associated health impacts hinders the completion of a comprehensive quantitative risk-benefit analysis, and the available air and water quality data should be evaluated in a broader risk-management context, which considers the potential life-cycle impacts, costs, and feasibility associated with alternative fuel oxygenates.     

Structural mapping applied to single value policies

The paper is a development of the use of multi dimensional scaling techniques for multiple criteria decision. It takes the special case of policies to each of which a single value can be applied and assigns indifferences between all pairs of these policies based on a series of probability laws. It is shown that the mapping performs well not only in throwing to opposite ends the high and low value policies but also shows that the position of policy points along the principal axis of the map is related to the single values.     

Public expenditure: Perceptions and preferences

Public preferences for government expenditure form an important part of the literature in public sector economics. However, in the academic literature these preferences have been largely considered as “given”. Exceptions to this are where public preferences expressed referenda (e.g. in California) can directly influence tax revenue and public expenditure levels. The present study follows an earlier one in using a questionnaire to ask individuals directly about their perceptions of and preferences for public spending. Replies from 50 respondents were analysed using multiple regression and analysis of variance techniques in order to ascertain whether public expenditure perceptions and preferences showed consistent and predictable patterns among young individuals with little or no experience of paying tax. The results showed that both perceptions and preferences for a series of seven macro-expenditure items were significantly different from one another and broadly predictable from individuals' self reported positions on ‘left/right’ scales. It is concluded that views about public expenditure may often form part of integrated attitudes with both perceptual and preferential components.     

Social Class,Cultural Repertoires,and Popular Culture: The Case of Film

This research examines two different conceptions of the relationship between social class and familiarity with popular culture in the United States. Specifically, it focuses on differences between members of the upper-middle class and members of the lower-middle class in terms of their film viewing practices. The data for this analysis was obtained from a survey of 364 individuals randomly selected from two neighborhoods in a medium-sized city, one predominantly upper-middle class and the other predominantly lower-middle class. Members of the upper-middle class view more art films, as well as more classic films and blockbuster films, than members of the lower-middle class. These differences are largely attributable to the fact that members of the upper-middle class view more films both in theaters and on videocassettes than members of the lower-middle class. Moreover, these differences are reduced, but not entirely eliminated, by the fact that members of the lower-middle class view more films on television than members of the upper-middle class. Finally, these differences in the film-viewing practices of the members of these two social classes, as identified by their neighborhood of residence, obtain even controlling for a series of demographic and socioeconomic background variables.     

Interdisciplinary team discussion on work environment issues related to low back disability: a multiple case study

From both a social and cost-benefit perspective, disability prevention and associated management strategies for assisting employees with back pain are only successful if they address critical return-to-work (RTW) determining factors present in the workplace, including ergonomic factors. Despite our current knowledge of the importance of an integrated team approach targeting these factors, questions remain regarding the conceptual framework adopted by contemporary rehabilitation teams as it relates to work-oriented interventions to accommodate employees back to work. The purpose of this study was to explore and describe the work environment issues discussed by an interdisciplinary team engaged in the work rehabilitation process of low back disability cases. A qualitative content analysis was conducted for 10 sample cases that underwent a rehabilitation program in Quebec (Canada). Drawing on the results of these analyses, a framework representing a synopsis of practitioners' involvement in the person-environment dynamic is presented and discussed. This study makes a unique contribution to the understanding of the 'real-life' content of an interdisciplinary activity in disability management, thus, helping rehabilitation practitioners to build knowledge on the practical application of a cross-disciplinary framework to address work environment issues during the RTW process of those patients sick-listed due to back pain.