The raise estimator estimation,inference, and properties

Several methods using different approaches have been developed to remedy the consequences of collinearity. To the best of our knowledge, only the raise estimator proposed by García et al. (2010 García, C.B., García, J., Soto, J. (2010). The raise method: An alternative procedure to estimate the parameters in presence of collinearity. Qual. Quantity 45(2):403–423.[Crossref], [Web of Science ®] , [Google Scholar]) deals with this problem from a geometric perspective. This article fully develops the raise estimator for a model with two standardized explanatory variables. Inference in the raise estimator is examined, showing that it can be obtained from ordinary least squares methodology. In addition, contrary to what happens in ridge regression, the raise estimator maintains the coefficient of determination value constant. The expression of the variance inflation factor for the raise estimator is also presented. Finally, a comparative study of the raise and ridge estimators is carried out using an example.     

The influence of nutritional factors on prostate cancer incidence and aggressiveness

There is an increasing evidence for a link between nutrition, lifestyle and prostate cancer (PCa) development and/or progression of disease. The objective of this study was to examine the association between dietary factors and PCa incidence and aggressiveness in a case-control study. After the analysis of the anatomic pathology, subjects were classified in patients with PCa (n?=?157) and controls (n?=?158). Clinical data including Gleason score, PSA values and biopsy results, were compiled. Frequencies of food consumption and sociodemographic data were also obtained. The results showed that physical activity was significantly higher in control (p?p?=?.041) and fish (p?=?.041) intakes. Moreover, there was a significant reduction in risk (p?=?.029) in cases with a higher fruits and vegetables intakes. A decreased risk of aggressive PCa was associated with fruits, vegetables, legumes and fish intakes. However, these relationships were not statistically significant when data were adjusted for covariates. In conclusion, this study found an inverse association between PCa risk and the intake of fruits and vegetables, fish and nuts. The results suggested that a diet with higher intakes of these foods as Mediterranean diet may lower the risk of PCa in the studied population. As dietary factors are modifiable, identifying food groups or dietary patterns that modulate the risk of PCa and its aggressiveness can offer effective and practical strategies for its primary prevention.     

The National Work–Life Balance Index©: The European Case

More than 5 years since the outbreak of the global financial crisis, a flurry of evidence is emerging on the effects of the ensuing economic downturn on unemployment and poverty rates in rich countries, but less is known about cross-country differences in subjective assessments of the crisis and whether adults in households with children were affected to a greater extent. This paper investigates differences in the perceived impact of the economic crisis between adults in households with and without children in 17 European countries, using data from the Life in Transition Survey 2010 in a multilevel modelling framework. It also explores differences in the coping strategies that households adopted to deal with the decline in income or economic activity. Everything else being equal, perceptions of the crisis were more widespread in countries with higher rates of child poverty, lower economic growth and lower GDP per capita. Across countries, perceptions of the crisis closely trailed subjective indicators of financial difficulties from other international surveys conducted in 2010. Adults in households with children were more likely to report an impact of the crisis, with larger differences in countries with higher rates of monetary child poverty. Adults in households with children also adopted a greater variety of coping strategies than the rest, prioritizing expenditure on basic necessities, while cutting back on luxuries and holidays. Nevertheless, many still reported reduced consumption of staple foods as a result of economic difficulties.     

Social norms, partnerships and children

This paper presents a social norms interpretation to explain cross-country differences in partnership formation rates. Social norms are modeled as a constraint on the allocation of household labor that diminishes the gains of entering a partnership, especially for highly educated women with a higher opportunity cost of time. Results using individual level data from 7 waves of the European Community Household Panel (1995?C2001) confirm the predictions from the theory. These results are robust to controlling for country varying factors such as childcare policies and divorce rates, and are mostly driven by marriage (as opposed to cohabitation) decisions. Given that household formation is a necessary prerequisite to having children, our results potentially shed light onto the process of below replacement fertility and the economic challenges associated with it.     

HIV seroprevalence and risk behaviors among clients attending a clinic for the homeless in Miami/Dade County,Florida, 1990–1996

In the early 1990s, HIV seroprevalence was highest at the Miami homeless clinic among 16 homeless sites participating in a nationwide sentinel survey. To examine dynamic seroprevalence patterns in Miami's homeless clients in relation to demographics and risk behaviors over six years, we analyzed data from an unlinked (blinded) serosurvey of clients attending the principal primary care clinic serving Miami's homeless. Data were from 3,797 medical encounters with homeless persons who, on their initial clinic visit within an annual survey period, received routine serologic testing and a risk behavior survey. Overall HIV seroprevalence was 15.9% and infection rates for men (16.4%) and women (14.5%) did not differ. Seroprevalence for blacks (19.9%) was significantly higher than for Hispanics (9.1%) or whites (8.3%) (p < 0.0001). Seroprevalence was 12.6% (35 times the national rate) for clients reporting heterosexual contact as their only risk. Significant increases in seroprevalence, above this heterosexual-contact-only 'baseline', were found for clients disclosing high-risk behaviors: male-to-male sex, drug injection, receiving or giving money/drugs for sex, and sexual contact with a drug injector or HIV-infected partner (p < 0.0001). Seroprevalence declined over six years from 23.2 to 7.2% (p < 0.0001). Significant downward trends were observed for men and women, blacks and Hispanics, men who have sex with men, and clients reporting heterosexual contact. The proportion of clients reporting high-risk behaviors decreased sharply (p < 0.0001). Elevated HIV seroprevalence in Miami's homeless clients was strongly associated with high-risk behaviors. Expansion of HIV prevention and HIV/drug treatment services for homeless persons is strongly recommended.     

Using Deductive Reasoning to Identify Unhappy Communities

Social Indicators Research - The complex interplay between media and population sentiment is a well-known, yet hard to model, phenomenon. The extrema of individual sentiment (euphoria and...     

An Adversarial Risk Analysis Framework for Cybersecurity

Risk analysis is an essential methodology for cybersecurity as it allows organizations to deal with cyber threats potentially affecting them, prioritize the defense of their assets, and decide what security controls should be implemented. Many risk analysis methods are present in cybersecurity models, compliance frameworks, and international standards. However, most of them employ risk matrices, which suffer shortcomings that may lead to suboptimal resource allocations. We propose a comprehensive framework for cybersecurity risk analysis, covering the presence of both intentional and nonintentional threats and the use of insurance as part of the security portfolio. A simplified case study illustrates the proposed framework, serving as template for more complex problems.     

The Meaningful Roles Intervention: An Evolutionary Approach to Reducing Bullying and Increasing Prosocial Behavior

Bullying is a problem that affects adolescents worldwide. Efforts to prevent bullying have been moderately successful at best, or iatrogenic at worst. We offer an explanation for this limited success by employing an evolutionary‐psychological perspective to analyze antibullying interventions. We argue that bullying is a goal‐directed behavior that is sensitive to benefits as well as costs, and that interventions must address these benefits. This perspective led us to develop a novel antibullying intervention, Meaningful Roles, which offers bullies prosocial alternatives—meaningful roles and responsibilities implemented through a school jobs program and reinforced through peer‐to‐peer praise notes—that effectively meet the same status goals as bullying behavior. We describe this new intervention and how its theoretical evolutionary roots may be applicable to other intervention programs.     

The effects of the Chilean divorce law on women’s first birth decisions

In 2004 a new law in Chile allowed couples to divorce for the first time. The law also established compensation in case of divorce where one spouse sacrifices professional development or advancement for the good of the household. Using birth histories constructed from the Chilean Social Security Survey (Encuesta de Prevision Social–EPS) Panel 2002–2009, we investigate the effect of the divorce law on a woman’s decision of when to have a first child. We find that the divorce law increases the hazard rate of having the first child by 61 % for more educated women, controlling for socioeconomic characteristics, length of marriage and the negative trend in fertility rates observed in Chile since the mid-1960s. We also find that a given percentage increase in a woman’s potential income will increase the hazard rate by a greater percentage increase after the passage of the law.