Community reactions to campaigns addressing crystal methamphetamine use among gay and bisexual men in New York City

Crystal methamphetamine (aka "crystal meth") use with high-risk sex has become an emerging health problem for gay and bisexual men in New York City since the late 1990s. Public health campaigns were eventually developed to encourage gay and bisexual men to avoid or reconsider using crystal meth. Reactions to three campaigns were measured with a cross-sectional survey administered in 2004. Among an ethnically-diverse sample of 971 gay and bisexual men, 61.8% reported seeing the campaigns. Those who reported ever using crystal meth, recent use, and recent use with sex were significantly more likely to have seen the campaigns. In general, white men, HIV-negative men, and men not currently using crystal meth responded more positively to the campaigns than their counterparts; yet, more men of color reported having discussions with partners and friends about their crystal use as a result of these campaigns. Implications for researchers and practitioners are discussed.     

Data and projections of HIV/AIDS cases in Portugal: an unstoppable epidemic?

The size of the affected population with HIV/AIDS is a vital question asked by healthcare providers. A statistical procedure called Back-calculation has been the most widely used method to answer that question. Recent discussions suggest that this method is gradually becoming less appropriate for reliable incidence and prevalence estimates, as it does not take into account the effect of treatment. In spite of this, in the current paper that method and a worst-case scenario are used to assess the quality of previous projections and obtain new ones. The first problem faced was the need to account for reporting delays, no reporting and underreporting. The adjusted AIDS incidence data were then used to obtain lower bounds on the size of the AIDS epidemic, using the back-calculation methodology. A Weibull and Gamma distribution was considered for the latency period distribution. The EM algorithm was applied to obtain maximum likelihood estimates of the HIV incidence. The density of infection times was parameterized as a step function. The methodology is applied to AIDS incidence in Portugal for four different transmission categories (injecting drug users, heterosexual, homo/bisexual and other) to obtain short-term projections (2002–2005) and an estimate of the minimum size of the epidemic.     

Mind the Gap,Please! The Effect of Temporary Help Agencies on the Consequences of Work Accidents

Using data from a Spanish register on work-related accidents, this paper analyses the effect of contract types on two consequences of accidents: the probability of suffering a serious/fatal accident and the number of working days lost after an accident has happened. The focus is on the difference among temporary workers hired through temporary help agencies, direct temporary workers and open-ended workers. We find that workers hired through temporary help agencies are less likely to suffer serious/fatal accidents and the durations of their absences are shorter when they do, compared with workers holding either open-ended contracts or direct temporary contracts once personal, job and accident characteristics are controlled for.     

Tests based on weighted rankings in complete blocks: exact distribution and monte carlo simulation

Quade (1972, 1979) proposed a family of nonparametric tests based on weighted within-block rankings, for testing the hypothesis of no treatment effects in a complete randomized blocks layout. In this paper we give a table of the exact null distribution of these tests when the number of treatments is 3, the number of blocks is less than or equal to 14 and the block scores are linear. Moreover, a Monte Carlo study was performed to compare the powers of these tests with parametric and nonparametric competitors     

Life Satisfaction in Brazil: Testing the Psychometric Properties of the Satisfaction With Life Scale (SWLS) in Five Brazilian Samples

The aim of this paper was to validate the Brazilian-Portuguese version of the Satisfaction With Life Scale (SWLS), presenting evidence of its reliability and construct and criterion-related validity. A large Brazilian sample (2,180 participants), from five different populations (undergraduate and high school students, general population, elementary school teachers, and physicians), was considered. The results confirmed the single factorial structure and reliability (0.77 < Cronbach’s α < 0.88, mean α = 0.81) of the SWLS. Supporting its criterion-related validity, the SWLS correlated positively with positive affect and negatively with both negative affect and psychological distress across all five samples. The findings indicate that the Brazilian-Portuguese version of the SWLS is a valid instrument to use with diverse Brazilian samples.     

Minimum phi-divergence estimators for loglinear models with linear constraints and multinomial sampling

In this paper the family ofφ-divergence estimators for loglinear models with linear constraints and multinomial sampling is studied. This family is an extension of the maximum likelihood estimator studied by Haber and Brown (1986). A simulation study is presented and some alternative estimators to the maximum likelihood are obtained. This work was parcially supported by Grant DGES PB2003-892     

Interrupted aspirations: research and policy on Gitano education in a time of recession,in Spain

During the past decade, Gitano students’ school success and its cultural, social and emotional consequences have been largely unexplored, particularly in a new context: the deep economic crisis in Spain. This study reviews and analyses the evolution of the research production and the changing contexts of policy trends affecting the ‘Roma education issue’ as they have developed in Spain during the past decade (2004–2014). The authors take as a starting point the groundbreaking study published in 2004 that focused on trajectories of educational achievement and continuity among Gitano youth, and go on to reconstruct the approaches undertaken by qualitative, quantitative and evaluation research since then, in relation to their contributions to improve policy recommendations. The role played by Spanish and European social and educational strategies addressed to the Gitano/Roma population is critically explored to challenge the controversial notion of a ‘Spanish model of Roma integration’. Finally, the authors argue that the deterioration of public education and the virtual disappearance of social benefits in recent years, in addition to the worrying actions taken against Roma citizens in the EU, are to account for the interrupted aspirations of a whole generation of Gitano/Roma youth.     

Participatory Skepticism: Ambivalence and Conflict in Popular Discourses of Participatory Democracy

In recent years researches have focused on the preferences of ordinary citizens towards democratic deepening, asking: Do people want more institutional participation? The present work analyzes how different classes of people envisage a participatory democracy and its problems. Supported by qualitative research based on 16 focus groups conducted in Spain between 2011 and 2013, it is shown that skepticism plays a central role in the views of participatory democracy. Doubts surrounding its viability, negative expectations on the responsiveness of governments and, overall, distrust of the capacities of ordinary citizens, contribute to skepticism. In some groups these beliefs lead to a rejection of participatory reforms. In other groups, participants harbor hopes and positive prospects. For them, the key point is faith in education as a shortcut to political equality.     

On beta regression residuals

We propose two new residuals for the class of beta regression models, and numerically evaluate their behaviour relative to the residuals proposed by Ferrari and Cribari-Neto. Monte Carlo simulation results and empirical applications using real and simulated data are provided. The results favour one of the residuals we propose.