Hasse Diagrams in Statistical Consulting and Teaching

Hasse diagrams summarize the structure of mixed models and can be used by a statistical consultant to help design a complicated experiment or to help clarify the structure of data to be analyzed. They are also useful in the classroom as an aid for obtaining expected mean squares or deciding which denominator should be used in an F statistic.     

Labor Force Supply Decisions of Rural Low-Income Mothers

Employment is crucial to the economic well-being of families. Using a multi-state sample of 412 rural low-income mothers, our study identifies factors influencing two employment decisions they make: labor force entry and number of hours supplied. A logistic regression model correctly predicted 80% of mothers’ work participation decisions. Employed mothers were older, better educated, and less likely to suffer from depression; as well as, more likely to have a driver’s license and receive child care assistance and the Earned Income Tax Credit. An estimated labor supply function explained 33% of the variation in hours worked by the 208 employed rural mothers. Higher wages, availability of health insurance, and overtime benefits predicted the number of hours they were willing to work.

What a drop can do: Dried blood spots as a minimally invasive method for integrating biomarkers into population-based research

Logistical constraints associated with the collection and analysis of biological samples in community-based settings have been a significant impediment to integrative, multilevel bio-demographic and biobehavioral research. However recent methodological developments have overcome many of these constraints and have also expanded the options for incorporating biomarkers into population-based health research in international as well as domestic contexts. In particular using dried blood spot (DBS) samples-drops of whole blood collected on filter paper from a simple finger prick-provides a minimally invasive method for collecting blood samples in nonclinical settings. After a brief discussion of biomarkers more generally, we review procedures for collecting, handling, and analyzing DBS samples. Advantages of using DBS samples-compared with venipuncture include the relative ease and low cost of sample collection, transport, and storage. Disadvantages include requirements for assay development and validation as well as the relatively small volumes of sample. We present the results of a comprehensive literature review of published protocols for analysis of DBS samples, and we provide more detailed analysis of protocols for 45 analytes likely to be of particular relevance to population-level health research. Our objective is to provide investigators with the information they need to make informed decisions regarding the appropriateness of blood spot methods for their research interests.     

Florida’s Changing Rainbow: Identifying Emerging Markets Through the Examination of Racial Composition and Demographic Change in Florida

Minority groups, including African Americans, Hispanics, and Asians, especially in a growing middle class, comprise an emerging market in the United States (Schwartz, Global Business Network, 2000). It is estimated that through 2025, the population of ethnic minorities in the United States will grow eight times faster than the White population; by the year 2050, some estimates project that “minorities” will make up nearly 50% of the United States population. As minority groups continue to grow in population, wealth, and buying power, it becomes imperative that businesses understand the differences among different segments of the population that will be consuming their products. This paper examines projected demographic changes for the State of Florida and the implications these changes have on increasing market opportunities for businesses. Researchers from the Northeast Florida Center for Community Initiatives used Geographic information systems (GIS) computer applications to conduct spatial analysis of U.S. Census Data, as well as proprietary economic and social indicators, to develop an analysis of distribution of certain ethnicities in Florida. The purpose of this paper is to identify potential areas of significant emerging market populations within Florida in order to improve service outreach for various economic opportunities during the coming decade.

Utilizing a Family Decision-Making Lens to Examine Adults’ End-of-Life Planning Actions

Guided by Rettig’s family decision-making theory, the study investigated the effect of an adult child’s decision environment, an adult child’s decision-making perceptions, and a parent’s end-of-life (EOL) planning actions before death on an integrated measure of medical and financial EOL planning actions. Data came from Wave 3 of the public use data of the Wisconsin Longitudinal Study. Results indicated that household net worth, parent’s completion of a living will before death, and adult children’s avoidance of death ideation explained the greatest proportion of variance in adult children’s EOL planning actions. Results also indicated that women, those married, and those with higher education did more EOL planning. Practitioners can use this information to close accessibility gaps due to net worth differences, advocate for a more unified approach to EOL planning, and shift the focus of discussions of death from the death itself to a life well lived.     

Family Structure Experiences and Child Socioemotional Development During the First Nine Years of Life: Examining Heterogeneity by Family Structure at Birth

A vast amount of literature has documented negative associations between family instability and child development, with the largest associations being in the socioemotional (behavioral) domain. Yet, prior work has paid limited attention to differentiating the role of the number, types, and sequencing of family transitions that children experience, as well as to understanding potential heterogeneity in these associations by family structure at birth. We use data from the Fragile Families and Child Wellbeing Study and hierarchical linear models to examine associations of family structure states and transitions with children’s socioemotional development during the first nine years of life. We pay close attention to the type and number of family structure transitions experienced and examine whether associations differ depending on family structure at birth. For children born to cohabiting or noncoresident parents, we find little evidence that subsequent family structure experiences are associated with socioemotional development. For children born to married parents, we find associations between family instability and poorer socioemotional development. However, this largely reflects the influence of parental breakup; we find little evidence that socioemotional trajectories differ for children with various family structure experiences subsequent to their parents’ breakup.     

America’s Churning Races: Race and Ethnicity Response Changes Between Census 2000 and the 2010 Census

A person’s racial or ethnic self-identification can change over time and across contexts, which is a component of population change not usually considered in studies that use race and ethnicity as variables. To facilitate incorporation of this aspect of population change, we show patterns and directions of individual-level race and Hispanic response change throughout the United States and among all federally recognized race/ethnic groups. We use internal U.S. Census Bureau data from the 2000 and 2010 censuses in which responses have been linked at the individual level (N = 162 million). Approximately 9.8 million people (6.1 %) in our data have a different race and/or Hispanic-origin response in 2010 than they did in 2000. Race response change was especially common among those reported as American Indian, Alaska Native, Native Hawaiian, Other Pacific Islander, in a multiple-race response group, or Hispanic. People reported as non-Hispanic white, black, or Asian in 2000 usually had the same response in 2010 (3 %, 6 %, and 9 % of responses changed, respectively). Hispanic/non-Hispanic ethnicity responses were also usually consistent (13 % and 1 %, respectively, changed). We found a variety of response change patterns, which we detail. In many race/Hispanic response groups, we see population churn in the form of large countervailing flows of response changes that are hidden in cross-sectional data. We find that response changes happen across ages, sexes, regions, and response modes, with interesting variation across racial/ethnic categories. Researchers should address the implications of race and Hispanic-origin response change when designing analyses and interpreting results.     

Social Workers’ Roles in Supporting the Sexual and Relational Health of Children with Disabilities

The purpose of this study was to understand social workers’ roles in meeting the sexual and relational health needs of children (aged 3–11) with disabilities. We conducted semi-structured interviews with 12 social workers from a range of practice settings. A phenomenological lens privileged the perspectives of social workers in their definitions of disability and sought to convey the meaning they assigned to their experiences of working with children in practice concerning matters related to sexual and relational health. Social workers enacted a broad definition of disability and often came to work with youth in contexts labeled as sexually problematic. In the provision of sexual health services, social workers embodied commonly adhered to roles including as practitioners, enablers, advocates, brokers, and managers. Services are needed that promote positive sexuality and relational health among children with disabilities. It is important that social workers be proactive advocates for the full inclusion of people with disabilities as equal sexual citizens.