Uncovering the Distribution of Motorists' Preferences for Travel Time and Reliability

We apply recent econometric advances to study the distribution of commuters' preferences for speedy and reliable highway travel. Our analysis applies mixed logit to combined revealed and stated preference data on commuter choices of whether to pay a toll for congestion‐free express travel. We find that motorists exhibit high values of travel time and reliability, and substantial heterogeneity in those values. We suggest that road pricing policies designed to cater to such varying preferences can improve efficiency and reduce the disparity of welfare impacts compared with recent pricing experiments.     

Explaining Condom Use Disparity Among Black and Hispanic Female Adolescents

The study examined condom use among 204 Black and Hispanic female adolescents who attended family planning clinics. Partner attitude, partner communication, parental communication and social support measures were used in a multinomial logistic regression model to predict condom use at last intercourse. The results indicated that adolescents who perceived that their partners had a positive attitude toward condom use were 1.37 times more likely to report condom use compared to those whose partners did not have a positive attitude. Additionally, adolescents who reported communicating with partners about condoms were .37 times more likely to use condoms compared to those who did not communicate with their partners. These findings suggest that increasing condom use among female adolescents will require addressing primarily partner factors. Male partners must also be included in interventions to increase condom use.     

Department conditions and the emergence of new disciplines: Two cases in the legitimation of African-American Studies

Theory and Society -     

Three Wise Young Men,a Cyber Community and Music — Counselling As Social Action: Storying a Community of Care in the Aftermath of Violence

This article describes counselling practice as social action, reporting on a case of children witnessing community violence and its aftermath. Highlighted is the role of friends who made a stand of solidarity against such violence. Outsider witness practices helped recruit and grow a community of care for the client and his friends. This community of care was significantly enhanced by the involvement of a lawyer/musician/activist who composed a song with the three friends to take a stance against guns and violence in their society. Caring solidarity, generosity and doing hope together formed small but significant alliances against entrenched practices of violence.     

An Integrated Risk Model of a Drinking-Water – Borne Cryptosporidiosis Outbreak

A dynamic risk model is developed to track the occurrence and evolution of a drinking-water–borne cryptosporidiosis outbreak. The model characterizes and integrates the various environmental, medical, institutional, and behavioral factors that determine outbreak development and outcome. These include contaminant delivery and detection, water treatment efficiency, the timing of interventions, and the choices that people make when confronted with a known or suspected risk. The model is used to evaluate the efficacy of alternative strategies for improving risk management during an outbreak, and to identify priorities for improvements in the public health system. Modeling results indicate that the greatest opportunity for curtailing a large outbreak is realized by minimizing delays in identifying and correcting a drinking-water problem. If these delays cannot be reduced, then the effectiveness of risk communication in preemptively reaching and persuading target populations to avoid exposure becomes important.     

An integrated risk model of a drinking-water-borne cryptosporidiosis outbreak.

A dynamic risk model is developed to track the occurrence and evolution of a drinking-water-borne cryptosporidiosis outbreak. The model characterizes and integrates the various environmental, medical, institutional, and behavioral factors that determine outbreak development and outcome. These include contaminant delivery and detection, water treatment efficiency, the timing of interventions, and the choices that people make when confronted with a known or suspected risk. The model is used to evaluate the efficacy of alternative strategies for improving risk management during an outbreak, and to identify priorities for improvements in the public health system. Modeling results indicate that the greatest opportunity for curtailing a large outbreak is realized by minimizing delays in identifying and correcting a drinking-water problem. If these delays cannot be reduced, then the effectiveness of risk communication in preemptively reaching and persuading target populations to avoid exposure becomes important.     

A Pilot Study Evaluating Students' Interest in International Social Work Education

International social work (ISW) has gained traction across the USA with a number of schools taking the lead in promoting the values of social work through exchange programs, service learning, and volunteerism. The internalization of campus through the proactive action of institutions to incorporate global perspectives into teaching, learning, and research in order to build intercultural competence among students, faculty, and staff has received little attention. This paper assesses the level of interest of social work students at a large urban university in the southwestern USA in embracing ISW and how they conceptualized their learning needs. Using a self-administered web-based survey offered to a total of 1,500 social work students with 18% respondent rate, the research determined through a chi-square test that students in Bachelor of Social Work, Master of Social Work, and PhD programs had a significant difference in preferences in areas of interests (χ² = 153, p ≤ 0.000). Overall, students demonstrated interest in direct practice (74.3%) and community and administrative practice (16.6%). Students also differed in their level of interest in participating in international exchange programs (χ² = 9.6, p = 0.047). Discussions address specific and unique interests categorized broadly as ‘globalized social worker,’ ‘humanitarian social worker,’ and ‘policy social worker,’ each of which requires specific skillsets and advanced behavior skills.     

New measures of clumpiness for incidence data

In recent years, growing attention has been placed on the increasing pattern of ‘clumpy data’ in many empirical areas such as financial market microstructure, criminology and seismology, and digital media consumption to name just a few; but a well-defined and careful measurement of clumpiness has remained somewhat elusive. The related ‘hot hand’ effect has long been a widespread belief in sports, and has triggered a branch of interesting research which could shed some light on this domain. However, since many concerns have been raised about the low power of the existing ‘hot hand’ significance tests, we propose a new class of clumpiness measures which are shown to have higher statistical power in extensive simulations under a wide variety of statistical models for repeated outcomes. Finally, an empirical study is provided by using a unique dataset obtained from Hulu.com, an increasingly popular video streaming provider. Our results provide evidence that the ‘clumpiness phenomena’ is widely prevalent in digital content consumption, which supports the lore of ‘bingeability’ of online content believed to exist today.