Integrating linear discriminant analysis,polynomial basis expansion,and genetic search for two-group classification

We propose a hybrid two-group classification method that integrates linear discriminant analysis, a polynomial expansion of the basis (or variable space), and a genetic algorithm with multiple crossover operations to select variables from the expanded basis. Using new product launch data from the biochemical industry, we found that the proposed algorithm offers mean percentage decreases in the misclassification error rate of 50%, 56%, 59%, 77%, and 78% in comparison to a support vector machine, artificial neural network, quadratic discriminant analysis, linear discriminant analysis, and logistic regression, respectively. These improvements correspond to annual cost savings of $4.40–$25.73 million.     

Exploring Nonbinary Gender Identities: A Qualitative Content Analysis

This study presents a qualitative exploration of nonbinary gender identities from a counseling framework. We studied 14 participants in an open-ended, online format, all of whom self-identified with nonbinary gender identities. Our analysis explored five primary themes: (a) identity development, (b) heterogenous identities, (c) the identity-expression divide, (d) invisibility and stressors, and (e) resilience and support. Participants’ experiences in counseling and practical implications for counselors working with nonbinary clients are also discussed, including cautions against assumption making, increased need for training and education about nonbinary clients, and nonbinary clients’ perceptions of counselor openness.     

The Role of Boomerang Fathers in Adolescent Female Depression

Data from the 1979 National Longitudinal Survey of Youth were employed to explore the association between boomerang fathering from birth to age 18 on adolescent depressive symptomatology (N = 3,731). We examined the effects of experiencing a biological father exiting and entering the home because of breaking up and repartnering with an adolescent's mother (i.e., “boomerang fathering”) when compared with other father residential patterns on adolescent depression. Findings suggest that boomerang fathering is more beneficial than harmful. Adolescent females exposed to boomerang fathering, as well as those exposed to fathers who resided with them from birth to age 18, reported significantly lower depressive symptoms when compared with females exposed to fathers who exited the household and never returned. Boomerang fathering was not significantly associated with male adolescent depressive symptomatology. Providing greater family support during times of instability may assist in unifying families and be an indirect source of mental health prevention.     

Cultural Trailblazers: Exploring the Career Development of Latina First‐Generation College Students

Latinas in the United States have had historically low college graduation rates, are overrepresented in lower paying occupations, and experience culture‐ and values‐based struggles in obtaining career goals. As Latinas increase their presence as a cultural group in higher education and grow in the U.S. workforce, researchers are called to uncover the challenging and complex career development experience of this diverse group of students. This qualitative study used a grounded theory methodology to explore the values and life‐role salience associated with the career development of Latina 1st‐generation college students at a primarily Caucasian institution. Results included 2 overarching themes with 5 subthemes supporting culturally sensitive career counseling practices while working with this sample. Future research implications examining the efficacy of interventions to help Latina 1st‐generation college students succeed in college are provided.     

CHEXPEDITE: A COMPUTER-BASED APPROACH TO THE BANK COURIER PROBLEM

This paper presents a successful computer-based approach to scheduling courier vehicles for the check collection system in multibranch commercial banks. The approach has been adopted by six large banks in the United States and has achieved dramatic cost savings at several of these banks. This paper begins by describing the bank courier problem and reviewing several approaches to the problem that have been proposed in the literature. A practical, computer-based approach to the bank courier problem is then presented. Finally, implementation experience at several banks is overviewed.     

Addictive Substances,Users’ Health,and the Government’s Perceived Responsibility: French People’s Perspective

This paper uses a semiparametric latent variable transformation model for multiple outcomes to examine the effect of education and maternal education on female multidimensional well-being and proposes a procedure to build a well-being index that is less susceptible to functional form misspecification. We model multidimensional well-being as an unobserved common factor underlying the observed well-being outcomes. The semiparametric methodology allows us to alleviate misspecification bias by combining multiple indicators into a latent construct in an unspecified, data-driven way. Using data from female participants of the 1974–2010 waves of the US General Social Survey, we find that education, intelligence, and maternal education contribute positively to multidimensional well-being. However, the effects of education and maternal education on female multidimensional well-being declined steadily between the mid-1970s and the 1990s, and have not rebounded since.     

Challenges in Measuring and Studying Multipartnered Fertility in American Survey Data

Multipartnered fertility (“MPF”) has become a major topic of interest in the United States due to potential negative linkages with parental, child, and family wellbeing. A first step in studying any newly emerging (or newly identified) social phenomenon is to properly define the issue and identify its prevalence. However, this is problematic in the case of MPF because most existing sources of data were not originally designed to study MPF. We examine the major data sources used to produce estimates of MPF in the United States, discussing the methodological issues that produce conflicting prevalence estimates and providing guidelines for producing comparable estimates. We also discuss important considerations for research seeking to link MPF and outcomes. Our recommendations will help researchers situate their findings in the broader literature and spur future research.     

Famine,Food Insecurity,Poverty and Public Action

Book reviewed in this article: Hunger and Public Action. By Jean Drèze and Amartya Sen The Political Economy of Hunger. Edited by Jean Drèze and Amartya Sen.     

Health Endowment at Birth and Variation in Intergenerational Economic Mobility: Evidence From U.S. County Birth Cohorts

New estimates of intergenerational economic mobility reveal substantial variation in the spatial distribution of opportunity in the United States. Efforts to explain this variation in economic mobility have conspicuously omitted health despite it being a key pathway for the transmission of economic position across generations. We begin to fill this gap in the literature by examining the relationship between health endowment at birth and intergenerational economic mobility across county birth cohorts in the United States, drawing on estimates from two population-level data sets. Exploiting variation across counties and over time, we find a negative relationship between the incidence of low-weight births and the level of economic mobility as measured in adulthood for the county birth cohorts in our sample. Our results build on a large and growing literature detailing the role of early childhood health in the transmission of economic status across generations and suggest that the incidence of low-weight births is negatively associated with intergenerational economic mobility.