A Psychosocial View of Mental Illness: An Introduction to Part II

Increasingly, grandmothers are parenting grandchildren in homes where parental presence is sporadic or nonexistent. A disproportionate percentage of African American grandparents fall in this category. The author reviews the literature on the African American grandmother in the context of the African American family and describes a practice model for service provision to those women who seek support as they “parent again.”     

Suicidality among homeless people: Testing the mediating effects of self-efficacy and depression

ABSTRACT

This cross-sectional study examined the mediating effect of PTSD on suicide ideation and suicide attempt through two mediators, self-efficacy and depression, among homeless adults. We recruited a non-random, purposive sample of 156 homeless adults from seven homeless people shelters in Kansas. SEM results suggest that self-efficacy and depression were significant mediators between PTSD and suicide ideation, but not between PTSD and suicide attempt. This study’s findings can be used to identify risk factors associated with suicidal behaviors that can be used to design service programs aimed at preventing suicidal ideation and attempt among people who are homeless.     

Racial and Ethnic Determinants of Interracial and Ethnic Trust

The purpose of this cross-sectional study was to discern which individual factors are associated with interracial/ethnic trust among a national probability sample of African Americans, Latinos, and non-Hispanic whites. Using national data from the 2000 Community Benchmark Survey, the multiple regression results indicate that, even after controlling for education and income, African Americans and Latinos reported significantly lower levels of interracial/ethnic trust than did non-Hispanic whites. Additionally, separate regression equations indicate that predictors associated with interracial/ethnic trust varied by racial and ethnic group. Implications and future research are discussed.     

Are government wages interlinked with private sector wages?

The ongoing fiscal and financial crisis with significant macroeconomic imbalances in the euro area raises the question in how far public–private wage interaction and even wage spirals contribute to fiscal and competitiveness problems. In this vain we analyse empirically whether the evolution of public sector wages is decoupled from that of the private sector. Using data for number of OECD countries, we find: (i) a strong and extremely robust positive annual contemporaneous correlation of public and private sector wages over the business cycle; (ii) evidence of co-movement of these variables over the medium and long run. From a policy perspective, the findings of this study suggest public wage restraint and private wage flexibility coupled—where needed—with institutional reform to prevent or break public–private wage spirals.     

Is the scheduling task context-dependent? A survey investigating the presence of constraints in different manufacturing contexts

Abstract

Most studies regarding real scheduling constraints only consider the constraints related to the specific manufacturing environment studied, limiting the possibility of drawing general conclusions. A survey of 50 companies was conducted in order to discover which constraints were present and what their relationship was with the scheduling context. This paper investigates which practical scheduling constraints are present in the manufacturing industry and whether the scheduling task is context-dependent. Results of this study show that some practical production constraints are context-dependent.     

Experience with an electricity market simulation tool

A successful experience to train power producers on pool-based electricity markets presented. Trainees are arranged in groups and assigned, at random, a set of generators. They play the role of power producers and compete against each other with the target of maximizing their own profits. They have to bid in terms of price and quantity to try to sell energy to the consumers through the market. The trainer plays the role of the market operator. A market simulator and a computer communication network make it possible to simulate the actual functioning of a pool-based electricity market. The simulator is based on the widely used software package MATLAB, and a computer communication net, which can be replaced by the WWW.     

Standard statistical tools for the breed allocation problem

Modern technologies are frequently used in order to deal with new genomic problems. For instance, the STRUCTURE software is usually employed for breed assignment based on genetic information. However, standard statistical techniques offer a number of valuable tools which can be successfully used for dealing with most problems. In this paper, we investigated the capability of microsatellite markers for individual identification and their potential use for breed assignment of individuals in seventy Lidia breed lines and breeders. Traditional binomial logistic regression is applied to each line and used to assign one individual to a particular line. In addition, the area under receiver operating curve (AUC) criterion is used to measure the capability of the microsatellite-based models to separate the groups. This method allows us to identify which microsatellite loci are related to each line. Overall, only one subject was misclassified or a 99.94% correct allocation. The minimum observed AUC was 0.986 with an average of 0.997. These results suggest that our method is competitive for animal allocation and has some interpretative advantages and a strong relationship with methods based on SNPs and related techniques.     

Volatility-Related Exchange Traded Assets: An Econometric Investigation

We develop a theoretical framework for covariance stationary but persistent positively valued processes which combines a semi-nonparametric expansion of the Gamma distribution with a component version of the multiplicative error model. Our conditional mean assumption allows for slow, possibly nonmonotonic mean-reversion, while our distribution assumption provides more flexibility than a traditional Laguerre expansion while preserving positivity of the density. We apply our framework to a dynamic portfolio allocation for Exchange Traded Notes tracking short- and mid-term VIX futures indices, which are increasingly popular but risky financial instruments. We show the superior performance of the strategies based on our econometric model.     

The Estimation of Food Expenditures From Household Budget Data in the Presence of Bulk Purchases

The aim of this article is the estimation of annual food expenditures with limited information about bulk purchases with data from a Spanish household-budget survey for 1990—1991. Three alternatives are compared. The first, currently used for official purposes, does not use all the information. The second uses all the available information in a rough way. The third assumes a formal model for the unknown frequency of purchases. The three alternatives are compared by a regression model that should be homogeneous with respect to the dummy variables that represent the partial information of the groups and should show a distinct pattern of outliers under each alternative. Finally, we study the effect of the official and the best alternative on food inflation and inequality measures. We find that they lead to similar inflation rates but to different inequality estimates.