Distance-based approach in univariate longitudinal data analysis

In this paper, we propose a methodology to analyze longitudinal data through distances between pairs of observations (or individuals) with regard to the explanatory variables used to fit continuous response variables. Restricted maximum-likelihood and generalized least squares are used to estimate the parameters in the model. We applied this new approach to study the effect of gender and exposure on the deviant behavior variable with respect to tolerance for a group of youths studied over a period of 5 years. Were performed simulations where we compared our distance-based method with classic longitudinal analysis with both AR(1) and compound symmetry correlation structures. We compared them under Akaike and Bayesian information criterions, and the relative efficiency of the generalized variance of the errors of each model. We found small gains in the proposed model fit with regard to the classical methodology, particularly in small samples, regardless of variance, correlation, autocorrelation structure and number of time measurements.     

Mortality analysis of persons with disabilities in Argentina by age,sex and duration of benefit, 2015–16

This article describes the differential mortality of Argentina’s disability pension beneficiaries during the 2015–16 period, based on National Social Security Administration (Administración Nacional de la Seguridad Social – ANSES) payment records. It compares data for those with an assessed disability with overall population data, as well as with available international data (from Canada, Chile, Mexico, and the United States of America). In addition to breaking down mortality rates for people with disabilities by age and sex, it also factors in duration of benefit, establishing an inverse correlation between benefit duration and mortality.     

Building revolutionary subjectivity: creative tensions in the Plataforma de Afectados por La Hipoteca

ABSTRACT

The paper assesses the Spanish housing activists Plataforma de Afectados por La Hipoteca (PAH, Platform for the Mortgage-Affected) as an example of left-wing convergence. From the perspective of the horizontal democratic practices and civil disobedience tactics they adopt, the paper acknowledges the anarchist, Marxist and reformist influences in PAH and reveals how the creative tension between activists of different persuasions has aided the movement’s relative success. In harnessing and transforming the revolutionary subjectivity of the movement of the squares in 2011, PAH has in turn led to a broader urban radical politics. This new revolutionary subjectivity captures PAH’s legacy and positioning within broader anti-austerity politics.     

The Structure of Social Cohesion: An Analysis of Its Levels and Dimensions in Mexico City1

This article aims to conceptualize and assess social cohesion in Mexico, taking into account their multilevel and multidimensional nature. To measure social cohesion levels and dimensions, we used the Social Welfare Survey (N = 2871) for the 16 municipalities in Mexico City. Then, we employed the distance method to construct a social cohesion index. In addition, we define social cohesion degrees (very high, high, medium, and low) to explore the relevance of each indicator. The findings suggest that the objective and subjective indicators at the meso‐level has the highest contribution, regardless of the territory or degrees of cohesion. This finding suggests that neighborhoods are well organized for solving everyday problems. Meanwhile, the willingness to help both friends and members of one’s network was not a priority, which can be explained by the suspicion toward other people and the prevalent economic conditions.     

A distance-based model for spatial prediction using radial basis functions

In the context of local interpolators, radial basis functions (RBFs) are known to reduce the computational time by using a subset of the data for prediction purposes. In this paper, we propose a new distance-based spatial RBFs method which allows modeling spatial continuous random variables. The trend is incorporated into a RBF according to a detrending procedure with mixed variables, among which we may have categorical variables. In order to evaluate the efficiency of the proposed method, a simulation study is carried out for a variety of practical scenarios for five distinct RBFs, incorporating principal coordinates. Finally, the proposed method is illustrated with an application of prediction of calcium concentration measured at a depth of 0–20 cm in Brazil, selecting the smoothing parameter by cross-validation.     

Finding Love: Passion,Intimacy, and Commitment in the Relationships of Gay Men

This paper identifies the stages of gay male relationships through a qualitative analysis of the interviews of 12 gay men within the context of the Sternberg ( 1986 ) three component model of love. Four stages were identified: Confrontation with sexuality: Preparing for intimacy, Exploration of Sexuality: Engaging with passion, Experimentation with Relationships: Uniting intimacy and passion, and Formation of Committed Relationships: Integrating passion, intimacy, and commitment. Confrontation with Sexuality was a necessary first step before forming intimate relationships, as it provided a context for the second stage of Exploration of Sexuality, where passion could be explored. Once sexuality had been explored, Experimentation with Relationships was the next stage which involved uniting passion with intimacy, often including a period of experimenting with the types of relationships that are usually explored much earlier for heterosexuals. Finally, the fourth stage of Formation of Committed Relationships was identified which involved the integration of passion, intimacy, and commitment. The therapeutic implications of these results are elaborated by an analysis of these stages in clinical cases.     

Terrorism,Organized Crime,and Social Distress

Abstract

It is safer to believe evil ofeveryone until people are found out to be good, but that requires a great deal ofinvestigation nowadays.     

Application of an Irt Polytomous Model for Measuring Health Related Quality of Life

Background: The Item Response Theory (IRT) has advantages for measuring Health Related Quality of Life (HRQOL) as opposed to the Classical Tests Theory (CTT). Objectives: To present the results of the application of a polytomous model based on IRT, specifically, the Rating Scale Model (RSM), to measure HRQOL with the EORTC QLQ-C30. Methods: 103 terminal cancer patients cared for by the home services of the Servicio Andaluz de Salud (Andalusian Health Service) (Andalusia, Spain) participated. These patients responded to the adapted Spanish version of the EORTC QLQ-C30. The application was carried out individually in the patients’ homes. Results: The results show that there is an adequate global fit between the data and the IRT model applied. The analysis of the items shows that for 31 of the 33 items there is a good fit. The items which measure the general perception of health and the perception of quality of life present a lack of fit. The study of the response categories of the items (by means of Category Probability Curves) indicates that all the alternatives work extremely well. Conclusions:The EORTC QLQ-C30 presents good metric qualities, under the RSM, ratifying the feasibility to measure HRQOL already shown in other studies carried out with CTT.     

Ethnic Differences in the Effects of Parental Depression on Preschool Children's Socioemotional Functioning

The present study describes the depressive symptomatology of 393 parents of prekindergarten children and assesses ethnic differences in the depression scores of these parents and their differential consequences for children's social competence. Data are drawn from the National Center for Early Development and Learning (NCEDL) classroom study, a national, longitudinal study examining the quality and outcomes of prekindergarten programs operated in schools or under the direction of state and local educational agencies, and the supplemental NCEDL familial and social environments study. Analyses indicated that Latino parents were more likely than African‐American and White parents to be depressed. However, as reported by both parents and teachers, behavioral outcomes for African‐American children of parents with elevated depressive symptomatology were worse than children of their Latino and White counterparts. Interactions between ethnicity and depressive symptomatology emerged in the parent‐child relationship, with African‐American parents with elevated depressive symptoms reporting significantly greater levels of conflict in the parent–child relationship than their non‐depressed counterparts. African‐American parents with elevated depression scores were also less likely to be in marital relationships than their non‐depressed counterparts. Among African‐American families, parent–child conflict served as a mediator of the effects of parental depression on child outcomes. Implications for intervention are discussed.     

A Dynamic Model of Investment in the U.S. Beef-Cattle Industry

Reproduction constraints lead to some a priori information that may prove valuable in econo- metrically modeling inventory dynamics within the U.S. cattle herd. The distributed-lag models estimated for animal inventories suggest an implicit incorporation of the age distribution of the herd that is crucial to understanding the retention/culling (investment) decisions. The estimated equations are validated using post-sample observations that were withheld prior to estimation. The final-form dynamic equations have complex roots and protracted price and investment effects. The parameter estimates are used to calculate intermediate and long-run elasticities at the means of relevant variables.