The Healthy Young Men's Study: Sampling Methods to Recruit a Random Cohort of Young Men Who Have Sex With Men

Recruiting a scientifically sound cohort of young men who have sex with men (YMSM) is an enduring research challenge. The few cohort studies that have been conducted to date on YMSM have relied on nonprobability sampling methods to construct their cohorts. While these studies have provided valuable information about HIV risk behaviors among YMSM, their generalizability to broader YMSM populations is limited. In this article, the authors describe a venue-based sampling methodology used to recruit a large and diverse cohort of YMSM from public venues in Los Angeles County, California. Venue-based sampling is a multistage probability sampling design that uses standard outreach techniques and standard survey methods to systematically enumerate, sample, and survey hard-to-reach populations. The study design allowed the authors to estimate individual, familial, and interpersonal psychosocial factors associated with HIV risk and health-seeking behaviors for a cohort of YMSM with known properties. Study participants completed an extensive baseline survey and over a 2-year period completed four follow-up surveys at 6-month intervals. The baseline survey was administered in both English and Spanish.     

Neighborhood and social environmental influences on child chronic disease prevalence

We investigate how distinct residential environments uniquely influence chronic child disease prevalence. Aggregating over 200,000 pediatric geocoded medical records to the census tract of residence and linking them to neighborhood-level measures, we use multiple data analysis techniques to assess how heterogeneous exposures of social and environmental neighborhood conditions influence an index of child chronic disease (CCD) prevalence for the neighborhood. We find there is a graded relationship between degree of overall neighborhood disadvantage and children’s chronic disease such that the highest neighborhood CCD scores are found in communities with the highest concentrated disadvantage. After considering individual- and family-level characteristics, results show that higher levels of neighborhood concentrated disadvantage and air pollution exposure associate with higher risks of children having at least one chronic condition. Overall, our analysis serves as a comprehensive start for future researchers interested in assessing which neighborhood factors matter most for child chronic health conditions.     

Aligning theory and methodology in mixed methods research: Before Design Theoretical Placement

When a theoretical framework (and its components) is not clearly linked to research methods, researchers risk designing flawed studies, wherein the stated research question is inconsistent with the research design. Explicitly identifying one’s theoretical orientation can provide an orderly schematic for linking observations from separate investigations (i.e. qualitative, quantitative) thereby facilitating understandings and guiding research designs particularly in fields of social and health sciences where complex phenomena are an aspect of the subject of inquiry. Although this has been established, how researchers might position their research theoretically to guide mixed methods research is less clear. In this paper, we propose the Before Design Theoretical Placement as a general guide for specifying and locating studies in a broader theoretical grounding, and discuss how it may inform overall study considerations. We then use this approach to illustrate how theories and methods can work together to facilitate professional knowledge development from a relational perspective.     

TRADE COSTS AND JOB FLOWS: EVIDENCE FROM ESTABLISHMENT‐LEVEL DATA

Changes in the costs of trading inputs or final goods affect establishment‐level job flows. Using a longitudinal database containing the universe of manufacturing establishments in California from 1992 to 2004, we find that a decline in input or final‐good trade costs is associated with job destruction in the least productive establishments, job creation in the most productive establishments, and an increase in the death likelihood of the least productive establishments. The evidence is consistent with predictions of models of trade with heterogeneous firms. Additionally, the evidence shows that the effects of input trade costs on establishment‐level job flows are larger than the effects of final‐good trade costs. (JEL F14, F16)     

Parent’s Perceptions of Involvement in Children’s Education: Findings from a Qualitative Study of Public Housing Residents

Parent involvement in children’s education is an important element in enhancing academic achievement and promoting positive behavior in young people. This qualitative study uses a Grounded Theory approach to examining parent’s perceptions of their ability or inability to be involved in their children’s education by querying about factors impacting involvement and their experiences overcoming barriers. A semi-structured interview guide was used to collect data on parents (N = 12) of youth who participate in a public housing after-school program by way of focus groups. Results suggest that parents are hopeful about engaging in education, but often fail to become actively involved because they feel marginalized. Furthermore, tangible barriers, a hurdle they were previously able to combat, was more challenging for them to overcome in the face of oppression. Marginalization is manifested cyclically for these parents. Implications for strategies helping parents become more involved in the educational process are identified.     

Probability of Exporting Infected Carcasses from Vaccinated Pigs Following a Foot‐and‐Mouth Disease Epidemic

Emergency vaccination is an effective control strategy for foot‐and‐mouth disease (FMD) epidemics in densely populated livestock areas, but results in a six‐month waiting period before exports can be resumed, incurring severe economic consequences for pig exporting countries. In the European Union, a one‐month waiting period has been discussed based on negative test results in a final screening. The objective of this study was to analyze the risk of exporting FMD‐infected pig carcasses from a vaccinated area: (1) directly after final screening and (2) after a six‐month waiting period. A risk model has been developed to estimate the probability that a processed carcass was derived from an FMD‐infected pig (P_carc). Key variables were herd prevalence (P_H), within‐herd prevalence (P_A), and the probability of detection at slaughter (P_SL). P_H and P_A were estimated using Bayesian inference under the assumption that, despite all negative test results, ≥1 infected pigs were present. Model calculations indicated that P_carc was on average 2.0 × 10^?5 directly after final screening, and 1.7 × 10^?5 after a six‐month waiting period. Therefore, the additional waiting time did not substantially reduce P_carc. The estimated values were worst‐case scenarios because only viraemic pigs pose a risk for disease transmission, while seropositive pigs do not. The risk of exporting FMD via pig carcasses from a vaccinated area can further be reduced by heat treatment of pork and/or by excluding high‐risk pork products from export.     

POWER, STATUS, AND ABUSE AT WORK: General and Sexual Harassment Compared

Workplace harassment can be devastating for employees and damaging for organizations. In this article, we expand the literature by identifying common and distinct processes related to general workplace harassment and workplace sexual harassment . Using both structural equation modeling and in-depth case immersion, we analyze content-coded data from the full population of workplace ethnographies—ethnographies that provide in-depth information on the nature and causes of both general and sexual harassment that would otherwise be difficult to gather. Importantly, both forms of harassment emerge in settings characterized by physically demanding work and minority work groups. In such contexts, both general and sexual harassment enforce formal and informal status hierarchies and social exclusion. Grievance mechanisms and "team models" of workplace organization reduce sexual harassment but have no effect on general harassment. We conclude with a discussion of theoretical, legal, and policy implications for identifying and remedying harassment as a widespread and devastating form of inequality and social exclusion in organizations.