An update on ‘a comparative study of tests for homogeneity of variance’

Tests for equality of variances using independent samples are widely used in data analysis. Conover et al. [A comparative study of tests for homogeneity of variance, with applications to the outer continental shelf bidding data. Technometrics. 1981;23:351–361], won the Youden Prize by comparing 56 variations of popular tests for variance on the basis of robustness and power in 60 different scenarios. None of the tests they compared were robust and powerful for the skewed distributions they considered. This study looks at 12 variations they did not consider, and shows that 10 are robust for the skewed distributions they considered plus the lognormal distribution, which they did not study. Three of these 12 have clearly superior power for skewed distributions, and are competitive in terms of robustness and power for all of the distributions considered. They are recommended for general use based on robustness, power, and ease of application.     

Archival Work as Qualitative Sociology

Qualitative Sociology -     

The role of tax-financed social security

This article provides a reassessment of the role of tax-financed social security. It outlines the relevant trends in developed and developing countries and discusses qualitative changes in the role and approach to tax-financed social security. It then assesses emergent forms of tax-financed social security in developing countries. It considers in particular their focus, scope, design and dynamics. It concludes that emergent tax-financed social security in developing countries holds the promise to make an impact on global poverty and vulnerability, and the main challenge is to ensure this contributes to the development of comprehensive social security systems.     

Methodology for the Calculation of Annualized Incremental Risks in Systems of Dams

In the past few years, the field of dam safety has approached risk informed methodologies throughout the world and several methodologies and programs are appearing to aid in the systematization of the calculations. The most common way of implementing these calculations is through the use of event trees, computing event probabilities, and incremental consequences. This methodology is flexible enough for several situations, but its generalization to the case of systems of several dams is complex and its implementation in a completely general calculation methodology presents some problems. Retaining the event tree framework, a new methodology is proposed to calculate incremental risks. The main advantage of this proposed methodology is the ease with which it can be applied to systems of several dams: with a single risk model that describes the complete system and with a single calculation the incremental risks of the system can be obtained, being able to allocate the risk of each dam and of each failure mode. The article shows how both methodologies are equivalent and also applies them to a case study.     

A Matrix Variate Closed Skew-Normal Distribution with Applications to Stochastic Frontier Analysis

In this article, we introduce the matrix extension of the closed skew-normal distribution and give two constructions for it: a marginal one and another based on hidden truncation. Important basic properties of the distribution are presented such as its closure under linear transformation and moment generating function. We also give distributional results for quadratic forms involving random matrices distributed according to two particular cases of it. Using an additive construction, we derive a submodel which can be employed to describe the compound error structure of a very general multivariate stochastic frontier model. Finally, we consider the skew-elliptical extension of the proposed distribution.     

The Use of Risk Assessment to Decide the Control Strategy for Bluetongue in Italian Ruminant Populations

The affiliation, assessment and management of risks is a traditional part of veterinary medicine. In the past, veterinary services involved in this type of activity usually assessed risks qualitatively. However, since the 1990s, quantitative methods have become increasingly important. The establishment of the World Trade Organization in 1994, and the promulgation of its Agreement on the Application of Sanitary and Phytosanitary Measures (the "SPS Agreement") led to an increased application of import risk analysis and to significant improvements in the methodology of risk analysis as applied to international trade policy for animals and animal products. However, there was very little development of risk analysis in veterinary fields other than international trade and management of health risks to consumers of animal products and little has been published on its use in the choice and definition of control or prophylaxis strategies for animal diseases. This article describes a quantitative risk assessment, which was undertaken in Italy to help choose an appropriate national response strategy following an incursion of bluetongue, an infectious disease of sheep and goats. The results obtained in this study support the use of risk analysis as a tool to assist in choosing an appropriate animal disease management strategy. The use of risk analysis in the evaluation of disease management strategies also offers advantages in international trade. It makes easier the comparison of different strategies applied in the various countries, and thus facilitates the assessment of equivalence of the guarantees provided by different strategies.     

Psychological abuse in Spanish same-sex couples: prevalence and relationship between victims and perpetrators

This study investigates the prevalence of psychological abuse victimization in same-sex couples and the relationship between being a victim and a perpetrator of these negative behaviours. The final sample consisted of 107 adults residing in Spain who identified themselves as lesbian women and gay men, and who had been involved in a conflictive same-sex relationship. Participants were asked how frequently they would label their experience of psychological abuse and three different estimation methods were used. Furthermore, the relationship between being a victim and being a perpetrator of psychological abuse behaviours was calculated through the behavioural estimation method using a questionnaire. The results showed that the prevalence rates varied from 11.3% to 56.6%, depending on the estimation method, and they revealed that there was no correlation between receiving and enacting psychological abuse behaviours. The variation in prevalence rates highlights methodological differences that limit the extent to which comparisons can be made across studies. Three estimation methods are introduced to stimulate future research on this issue.     

Will evolutionary psychology become extinct? Evolutionary psychology as the Leaning Tower of Pisa

ABSTRACT

Evolutionary psychology has as its foundation the classical Darwinian-Wallace theory of evolution. Using this theory as a guideline, evolutionary psychologists have interpreted human behaviors from an adaptationist outlook using a circular logic wherein no matter what the behavior is being looked at it is always given an evolutionary rationale. Additionally, there is much speculation as to evolutionary effects in the past and these speculations are seen as factual. Furthermore, there is evidence that the classical theory is flawed in that the emphasis on adaptation as the basis for evolution is incorrect. In that there is no actual evidence that Natural Selection (i.e., adaptation) has led to speciation. Previous scientists who have criticized the classical theory are cited, who made the case for speciation having occurred through a sudden “saltationist” process rather than the classical gradual process. As such, the author predicts that evolutionary psychology may ultimately become extinct as a subdiscipline.