The endogeneity of union status and the application of the hausman test

Union endogeneity in relative wage equations has been long recognized. Recently, a new specification test, parsimonious in its computational requirements, has been advocated. This paper investigates the suitability of the test in a switching regression framework and critiques its most widely cited application.     

Shaping ways of managing diversity in Portuguese schools,from the student's perspective

This article examines the results of an empirical research project that analysed the political socialisation processes of the students at three Portuguese public secondary schools in the Lisbon Metropolitan Area in 2011. Against the background of the implementation of an ‘education for citizenship’ programme in the official Portuguese school curriculum (2001), the project basically sought to know what attitudes the students mobilised in the face of a hypothetical situation involving the presence of ciganos (gypsies) in a school context. In this respect, and based on a pragmatic and comprehensive perspective, we attempted to test the concept of multiculturality and how it is seen and experienced by the students at these schools. Our aim is to answer the question: In a school context, how do students think the coexistence of gypsies and non-gypsies should be managed? In seeking to answer this question, the methodology that seemed to us most appropriate to this study's objectives is founded on the mobilisation of a scenario-based questionnaire, and to this purpose we surveyed 700 secondary students in a classroom environment. We were able to identify and characterise four possible coexistence formats within the overall framework of a synoptic vision of the available ways of managing a multicultural experience: separation; socialisation; universalism; and co-operation.     

Prevalence of Sexual Problems in Portugal: Results of a Population-Based Study Using a Stratified Sample of Men Aged 18 to 70 Years

Despite the use of different methodologies, target populations, and clinical definitions of sexual problems, recent epidemiological studies have shown that the occurrence of sexual difficulties is a very common experience among men from the general population regardless of their age. The objective of this study was to present epidemiological data on the prevalence of sexual difficulties in a community sample of 650 sexually active Portuguese men, stratified by age, marital status, and educational level. Participants completed a self-reported questionnaire assessing sexual function in the previous four weeks (International Index of Erectile Function). Results showed that sexual difficulties were relatively common among this sample. Rapid ejaculation was the most frequently reported sexual difficulty (23.2%), followed by erectile difficulties (10.2%), orgasm problems (8.2%), and low desire (2.9%) in the previous four weeks. With the exception of rapid ejaculation, all categories showed age-specific prevalence rates, with sexual difficulties increasing gradually in men above age 45. Age was a significant predictor of all sexual difficulties except rapid ejaculation, and lower educational levels were related to orgasm difficulties. Findings are consistent with the majority of epidemiological studies indicating a high prevalence of sexual difficulties among men in the general population and highlight the importance and the need to implement sexual health promotion programs in the target population.     

Mimicry and the Judgment of Emotional Facial Expressions

Lipps (1907) presented a model of empathy which had an important influence on later formulations. According to Lipps, individuals tend to mimic an interaction partner's behavior, and this nonverbal mimicry induces—via a feedback process—the corresponding affective state in the observer. The resulting shared affect is believed to foster the understanding of the observed person's self. The present study tested this model in the context of judgments of emotional facial expressions. The results confirm that individuals mimic emotional facial expressions, and that the decoding of facial expressions is accompanied by shared affect. However, no evidence that emotion recognition accuracy or shared affect are mediated by mimicry was found. Yet, voluntary mimicry was found to have some limited influence on observer' s assessment of the observed person's personality. The implications of these results with regard to Lipps' original hypothesis are discussed.     

Dysfunctional sexual beliefs as vulnerability factors to sexual dysfunction

The differences on sexual beliefs presented by men and women with sexual dysfunction and their sexually functional counterparts were investigated. A total of 488 participants (160 females and 232 males without sexual problems and 47 females and 49 males with a DSM-IV diagnosis of sexual dysfunction) answered the Sexual Dysfunctional Beliefs Questionnaire. Findings showed that, although effects have only reached statistical significance for the female group, both dysfunctional men and women endorsed more sexual dysfunctional beliefs than functional. Women presented significantly more age related beliefs (after menopause women loose their sexual desire, as women age, the pleasure they get from sex decreases) and body image beliefs (women who are not physically attractive cannot be sexually satisfied). Additionally, sexually dysfunctional males presented higher scores (not statistically significant) on 'macho' belief (a real man has sexual intercourse very often) and the beliefs about women satisfaction (the quality of the erection is what most satisfies women). Overall, findings support the idea that sexual beliefs may play a role as vulnerability factors for sexual dysfunction.     

Portuguese PR consultancy websites: Content and presence

The overall objective of this work is to understand the online presence of Portuguese PR, Consultancies associated with APECOM by undertaking an analysis of the content and features of their, websites. This analysis will demonstrate how the PR Consultancies are promoting themselves and their, services.     

Adapting The Revised Self-Leadership Questionnaire to The Portuguese Context

This study aimed to adapt the Revised Self-Leadership Questionnaire (RSLQ) (Houghton and Neck in J Manag Psychol 17(8):672?C691, 2002) for the Portuguese population. 720 professionals, and university and post-graduate students participated in this study. The RSLQ factorial structure was accessed through exploratory and multi group confirmatory factor analysis. From the 9 sub dimensional and 34 items original scale, only 7 sub dimensions and 21 items were preserved. The model tested through cross-validation multigroup analysis proved to be totally invariant across the groups, suggesting good model fit.     

Model selection for stock prices data

The geometric Brownian motion (GBM) is very popular in modeling the dynamics of stock prices. However, the constant volatility assumption is questionable and many models with nonconstant volatility have been developed. In the papers [7 M.L. Esquível and P.P. Mota, On some auto-induced regime switching double-threshold glued diffusions, J. Stat. Theory Pract. 8 (2014), pp. 760–771. doi: 10.1080/15598608.2013.854184.[Taylor &; Francis Online] , [Google Scholar],12 P. P. Mota and M.L. Esquível, On a continuous time stock price model with regime switching, delay, and threshold, Quant. Financ. 14 (2014), pp. 1479–1488. doi: 10.1080/14697688.2013.879990.[Taylor &; Francis Online], [Web of Science ®] , [Google Scholar]] the authors introduce a regime switching process where in each regime the process is driven by GBM and the change in regime is defined by the crossing of a threshold. In this paper we used Akaike's and Bayesian information criteria to show that the GBM with regimes provides a better fit than the GBM. We also perform a forecasting comparison of the models for two selected companies.     

Role versatility among men who have sex with men in urban Peru

Role versatility refers to the practice in which individual men who have sex with men (MSM) play both insertive and receptive sexual roles over time. Versatility has been thought to be relatively uncommon among Latin American MSM but possibly rising. Versatility has also been shown to be a potentially large population-level risk factor for HIV infection. In this study we examine the correlates of versatile behavior and identity among 2,655 MSM in six Peruvian cities. Versatile behavior with recent male partners was found in 9% of men and versatile ("moderno") identity was reported by 16%. Significant predictors included high education, white-collar occupation, sex work, and residence in Lima. Age was not significant in any analysis. Since sex work is negatively correlated with other predictors, versatile men appear to comprise two distinct sub-populations. Insertive-only men appear to play a strong role in bridging the HIV epidemic between MSM and women.     

Dissemination and implementation of evidence-based practice in the social services: a UK survey

A cross sectional UK-wide survey assessed current levels of dissemination and implementation of evidence-based practice in social care and social work agencies. A structured questionnaire was e-mailed to 357 agencies of which 155 (43.4%) completed and returned it. Although the results show that evidence-based practice in this area is still in its early stages, most respondents reported a good knowledge of evidence-based practice as well as the view that professional decisions should be informed by-but not only-research evidence. The lack of time, resources, information, and training are identified as the main barriers to be overcome for an effective implementation of evidence-based practice in the social services.