A two-sample empirical likelihood ratio test based on samples entropy

Powerful entropy-based tests for normality, uniformity and exponentiality have been well addressed in the statistical literature. The density-based empirical likelihood approach improves the performance of these tests for goodness-of-fit, forming them into approximate likelihood ratios. This method is extended to develop two-sample empirical likelihood approximations to optimal parametric likelihood ratios, resulting in an efficient test based on samples entropy. The proposed and examined distribution-free two-sample test is shown to be very competitive with well-known nonparametric tests. For example, the new test has high and stable power detecting a nonconstant shift in the two-sample problem, when Wilcoxon’s test may break down completely. This is partly due to the inherent structure developed within Neyman-Pearson type lemmas. The outputs of an extensive Monte Carlo analysis and real data example support our theoretical results. The Monte Carlo simulation study indicates that the proposed test compares favorably with the standard procedures, for a wide range of null and alternative distributions.     

Television in American ideological hopes and fears

The Chicago School of Social Thought was characterized by a hope for a Great Community fashioned through the new media technologies. The communication theorists at Chicago reflected long-standing patterns of the American imagination, assuming a consensual model of society in which technologies would aid in producing abundance. This article examines some of these themes, using the rise of television after World War II as the focus. A new middle class is seen to emerge which viewed television as the agency for creating their new community and an arena for struggling with various status groups to become legitimate.     

Comparative Potency Method for Cancer Risk Assessment: Application to Diesel Particulate Emissions1

An estimation of the human lung cancer “unit risk” from diesel engine particulate emissions has been made using a comparative potency approach. This approach involves evaluating the tumorigenic and mutagenic potencies of the particulates from four diesel and one gasoline engine in relation to other combustion and pyrolysis products (coke oven, roofing tar, and cigarette smoke) that cause lung cancer in humans. The unit cancer risk is predicated on the linear nonthreshold extrapolation model and is the individual lifetime excess lung cancer risk from continuous exposure to 1 μg carcinogen per m³ inhaled air. The human lung cancer unit risks obtained from the epidemiologic data for coke oven workers, roofing tar applicators, and cigarette smokers were, respectively, 9.3 × 10^?4, 3.6 × 10^?4, and 2.2 × 10^?6 per μg particulate organics per m³ air. The comparative potencies of these three materials and the diesel and gasoline engine exhaust particulates (as organic extracts) were evaluated by in vivo tumorigenicity bioassays involving skin initiation and skin carcinogenicity in SENCAR mice and by the in vitro bioassays that proved suitable for this analysis: Ames Salmonella microsome bioassay, L5178Y mouse lymphoma cell mutagenesis bioassay, and sister chromatid exchange bioassay in Chinese hamster ovary cells. The relative potencies of the coke oven, roofing tar, and cigarette smoke emissions, as determined by the mouse skin initiation assay, were within a factor of 2 of those determined using the epidemiologic data. The relative potencies, from the in vitro bioassays as compared to the human data, were similar for coke oven and roofing tar, but for the cigarette smoke condensate the in vitro tests predicted a higher relative potency. The mouse skin initiation bioassay was used to determine the unit lung cancer risk for the most potent of the diesel emissions. Based on comparisons with coke oven, roofing tar, and cigarette smoke, the unit cancer risk averaged 4.4 × 10^?4. The unit lung cancer risks for the other, less potent motor-vehicle emissions were determined from their comparative potencies relative to the most potent diesel using three in vitro bioassays. There was a high correlation between the in vitro and in vivo bioassays in their responses to the engine exhaust particulate extracts. The unit lung cancer risk per μg particulates per m³ for the automotive diesel and gasoline exhaust particulates ranged from 0.20 × 10^?4 to 0.60 × 10^?4; that for the heavy-duty diesel engine was 0.02 × 10^?4. These unit risks provide the basis for a future assessment of human lung cancer risks when combined with human population exposure to automotive emissions.     

Whither the profession of sociology?

Sociological practice and applied sociology have long held an ambiguous status within the profession. A major source of tension has been the debate over the utility of knowledge: one faction views sociology as inescapably involved with societal problems and social action; another faction seeks scientific status and academic acceptance. In recent years, sociological practice and applied sociology have received greater recognition within the ASA. In the future, the vitality of the sociological enterprise will depend more upon its perceived social utility than its academic standing. The demand for useful knowledge and skills in social analysis will grow as a result of the increasing need for program assessments and the need to democratically “manage” diverse ethnic and cultural differences in the common interest.     

Keines für alle!

The article is an answer to Hartmut Esser’s “One for All? The Weber Paradigm, the Moderate Methodological Holism Concept and the Sociological Explanation Model”, published earlier in this journal (KZfSS 58: 352–363). It explicates the differences between Essers sociological explanation model and the alternative model of moderate methodological holism. It analyses Esser’s misunderstandings and shows that his model — contrary to Esser’s “official” announcement — doesn’t entail the concept of macrodetermination, which is rightly so, because it doesn’t fit with Essers reductionist approach. The ontological and anthropological conceptions underlying the two explanation models are very different and lead to different methodologies.     

Constitutional Reform and Canadian Social Policy

It is generally accepted that Governments, with a neo-conservative or more properly a Victorian neo-liberal bent will, through various means and mechanisms, try to dismantle aspects of the Welfare State. While these mechanisms usually take the form of privatization, reductions in expenditures, de-indexing and the like, a much more subtle process currently is underway in Canada. Two broad initiatives — Constitutional Change and Free Trade — of the Mulroney government seriously threaten the future of the Canadian Welfare State. The Welfare State is not the direct target in either of these initiatives but the implications, in the view of the authors, are profound. This article examines the question of constitutional reform and the consequences for Canadian social policy.     

Private Bag: Regionwide Planning Will Make the Problems Worse

Population and Environment -