On the Skew-Normal-Cauchy Distribution

A fixed effects one-way layout model of analysis of variance is considered where the variances are taken to be possibly unequal. Conservative single-stage procedures based on Banerjee’s method for the solution of the Behrens-Fisher problem are proposed for the following multiple comparisons problems: 1) all pairwise comparisons with a control population mean, and 2) all pairwise comparisons and all linear contrasts among the means. Since these procedures are likely to be very conservative in practice, approximate procedures based on Welch’s method for the solution of the Behrens-Fisher problem are suggested as alternatives. Monte Carlo studies indicate that the latter are much less conservative and hence may be better in practice. Both these sets of procedures need only the tables of the Student’s t-distribution for their application and are very simple to use. Exact two-stage procedures are proposed for the following multiple comparisons problems: 1) all pairwise comparisons and all linear contrasts among the means, and 2) all linear combinations of the means.     

Multimarket pioneers: Does multimarket contact improve their performance?

First-mover advantages (FMA) and multimarket contact (MMC) have evolved independently in the strategic management literature. This is surprising because FMA erode as a result of competition which, in turn, is affected by MMC. This paper links these literatures through the concept of spheres of influence and analyses the effect of MMC on pioneers' profitability. We use the order of market entry to identify spheres of influence and to determine their distribution among multimarket firms. The distribution of spheres of influence allows us to distinguish between reciprocal MMC and non-reciprocal MMC and to study how each of them determines pioneers' profitability. We test our hypotheses in the mobile telecommunications industry. Our findings show that reciprocal MMC has a positive effect on pioneers’ results, but non-reciprocal MMC negatively affects them.     

Recycling the idea of race: socio-political agenda,transnational business culture,and diversity management in Brazil

ABSTRACT

This article intends to contribute to the line of studies that critically addresses diversity management, bringing the Brazilian experience into the discussion. It aims to demonstrate how large Brazilian companies and transnational corporations operating in the country have been recycling the idea of race in order to cope with the greatest politicisation of debates on the racial issue within the Brazilian public sphere since the late twentieth century. This phenomenon is related to changes in the political actions of the black movement in Brazil, which since the same period has been absorbing the new socio-political agenda existing within the global network of anti-racism advocacy. This is an agenda in which two purposes have a central importance: the battle against racial inequality and the demand for affirmative action policies. The data presented in this paper are part of broader research in which, by means of the biographical method and the ethnographic fieldwork, the social trajectories and career paths of two generations of Brazilian black executives were analysed.     

Bayesian methods for the cross-design synthesis of epidemiological and toxicological evidence

Summary.  Systematic review and synthesis (meta-analysis) methods are now increasingly used in many areas of health care research. We investigate the potential usefulness of these methods for combining human and animal data in human health risk assessment of exposure to environmental chemicals. Currently, risk assessments are often based on narrative review and expert judgment, but systematic review and formal synthesis methods offer a more transparent and rigorous approach. The method is illustrated by using the example of trihalomethane exposure and its possible association with low birth weight. A systematic literature review identified 13 relevant studies (five epidemiological and eight toxicological). Study-specific dose–response slope estimates were obtained for each of the studies and synthesized by using Bayesian meta-analysis models. Sensitivity analyses of the results obtained to the assumptions made suggest that some assumptions are critical. It is concluded that systematic review methods should be used in the synthesis of evidence for environmental standard setting, that meta-analysis will often be a valuable approach in these contexts and that sensitivity analyses are an important component of the approach whether or not formal synthesis methods (such as systematic review and meta-analysis) are used.     

Productivity growth,external shocks,and capital inflows in Chile: A general equilibrium analysis

This paper uses a computable general equilibrium model to analyze the growth path of the Chilean economy during 1977–1981. During that period a comprehensive package of reforms liberalized international trade and removed restrictive labor legislation. As a result of the reforms, there were large changes in relative prices and in the structure of production and demand, and the economy enjoyed unprecedented growth with declining inflation. But large macroeconomic imbalance become evident toward the end of the period and in 1982 Chile experienced an abrupt and severe recession. Taking the real exchange rate as an exogenous policy variable, and using the observed levels of employment growth and foreign capital inflows, this paper compares model-generated growth paths with those of the economy. First, the benchmark simulation path is used to estimate the magnitude and pattern of growth and productivity change during the 1971–1981 period. Next, counter-factual simulations are used to assess how Chile's economic performance would have differed if (a) external events had been different; and (b) foreign capital inflows had been different. The analysis suggests that the macroeconomic imbalances that led to the crisis in 1982 were exacerbated by the large capital inflows and real exchange rate appreciation that resulted from the use of the exchange rate as a stabilization device.     

Sociodemographic characteristics of gay and lesbian victims of intimate partner psychological abuse in Spain and Latin America / Características sociodemográficas de gais y lesbianas víctimas de abuso psicológico en pareja en España e Hispanoamérica

Psychological abuse in same-sex couples has hardly been studied in Spain and Latin America, despite its importance in society and public health. The objective of this study is to examine the prevalence of psychological abuse in same-sex couples in Spain and Latin America and analyse the associated sociodemographic characteristics. An online survey was conducted with 663 gay and lesbian respondents from Spain and Latin America. Of the total sample, 10.6% reported that they perceived themselves as victims of psychological abuse from their partner (9.6% in gay men and 10.7% in lesbians). In gay men, differences were found between victims and non-victims on the sociodemographic variables of age, professional status, and daily alcohol consumption. In lesbians, significant differences were found between victims and non-victims in the country and professional status variables. When comparing gay and lesbian victims, significant differences were found in professional status and alcohol consumption. This study contributes to better understanding of this phenomenon, and it reveals the need for further research.     

Working a Third Shift: Physical Activity and Embodied Motherhood

In their conception of the “third shift,” Dworkin and Wachs argue that working mothers engage in fitness and bodywork in addition to the first shift of professional work and the second shift of household labor and childcare. Within this third shift, the goal for women is to “erase physical evidence of motherhood” and return to the pre-pregnancy self. The cultivation of a body socially defined as “good” and “attractive” thus serves as a visible illustration of an embodied subjectivity anchored in morality and neoliberal personal responsibility, signifying a strong woman who has her body and her life under control. Utilizing thematic analysis to examine dominant constructions of embodied motherhood in popular texts and products, this article offers five conceptual categories to explore why and how women in engage in bodywork. Understanding how women operationalize the third shift of fitness and bodywork is important because it helps to unpack the struggles of contemporary motherhood and the competing realities of home, work, and self-care.     

Testing the Personal Wellbeing Index on 12–16?Year-Old Adolescents in 3 Different Countries with 2 New Items

The 7-item adult version of the Personal Wellbeing scale (Cummins et al. Social Indic Res 64:159?C190, 2003) was administered to two samples of adolescents aged 12?C16 in Brazil (N?=?1,588) and Spain (N?=?2,900), and to a sample of adolescents aged 14?C16 in Chile (N?=?843). The results obtained were analyzed to determine its psychometric characteristics when used with adolescents in the three different countries and to check whether two additional items would improve its qualities. Results reveal that the new PWI-9 version worked well with the adolescents in the three countries, improving some of the qualities of the PWI-7. One of the added items, satisfaction with oneself, appears to be a major contributor to unique explained variance when regressed on the single-item of overall life satisfaction (OLS). The model we present using structural equations shows good fit statistics for the factor structure, with both 7 and 9 items. Separate in-country analyses demonstrate that cultural context has a strong influence on correlations and saturations between the studied variables and also on the explained variance. Probably related to this fact, the Model fit structure is good in Brazil (with a low PWI variance accounted for by its predictors) and Spain (medium), but rather modest in Chile, where data show a high proportion of the PWI variance accounted for by its predictors. However, a multi-group factor analysis among the three countries restricting saturations to 1 in each country in order to make data comparable across countries still show a good fit of the proposed model for both PWI-7 and PWI-9.     

A general equilibrium model of domestic commerce in Mexico

In this paper we develop a general equilibrium model of the Mexican economy that focuses on the commercial sector, particularly retailing. Consumers purchase goods in different retail establishments, that sell differentiated goods at different prices. Where each consumer decides to make purchases depends on various price and locational considerations. The model has been calibrated to replicate the Mexican economy in 1977, the latest year for which a complete data set is available. We use it to analyze both the impact of the 1980 fiscal reform, a major policy charge for the economy as a whole, and that of a hypothetical development project aimed specifically at the commercial sector. Although our model was conceived and developed well prior to the current period of highly inflationary policies of the debt crisis, the latter was taken into consideration during both the simulations and their policy evaluation.