Serve or skip: the power of rejection in online bottleneck matching

We consider the online matching problem, where n server-vertices lie in a metric space and n request-vertices that arrive over time each must immediately be permanently assigned to a server-vertex. We focus on the egalitarian bottleneck objective, where the goal is to minimize the maximum distance between any request and its server. It has been shown that while there are effective algorithms for the utilitarian objective (minimizing total cost) in the resource augmentation setting where the offline adversary has half the resources, these are not effective for the egalitarian objective. Thus, we propose a new Serve-or-Skip (SoS) bicriteria analysis model, where the online algorithm may reject or skip up to a specified number of requests, and propose two greedy algorithms: GriNN(t) and \({{\textsc {Grin}}^*(t)}\). We show that the SoS model of resource augmentation analysis can essentially simulate the doubled-server-capacity model, and then examine the performance of GriNN(t) and \({\textsc {Grin}^*(t)}\).     

Using the End‐User Computing Satisfaction (EUCS) Instrument to Measure Satisfaction with a Web Site

The purpose of this study is to revise and revalidate the End‐User Computing Satisfaction (EUCS) instrument to measure satisfaction with a Web site from a usability perspective. This study is especially important given the increased significance of the Web and the uniqueness of the Web as a computing environment. A total of 176 students participated in a lab simulation that involved a usability evaluation of the Lands' End Web site ( http://www.landsend.com ). Students were asked to complete a set of tasks, record their answers, and then complete the EUCS instrument. Confirmatory factor analysis and invariance analyses were conducted to test the reliability, validity, and generalizability of the revised EUCS. The results show that the EUCS is a valid and robust instrument in the Web environment but that one of the subfactors, timeliness, will need further refinement in the future. Usability practitioners can use the EUCS to measure end‐user satisfaction with a Web site and use the feedback for improving Web‐site design. We describe a case study of an actual usability application that utilized the revised EUCS effectively to support the design of building supply Web sites involving two types of end users, homeowners and contractors. We also propose a typology that researchers can use as a starting point to judge when it is necessary to revalidate an instrument like the EUCS. Finally, we discuss the limitations of our study and present avenues for future research.     

Police Accounts of Body-Worn Camera Footage In News Media

People offer accounts in response to actions that are subjected to valuative inquiry. Recordings of police actions captured on body-worn camera (BWC) video can become subject to valuative inquiry when footage is publicly released. This footage may possibly undermine police legitimacy. Managing legitimacy is a basic rationale for why police provide accounts in response to their conduct. Proponents of BWCs assert that the devices enhance legitimacy and, while police have long used accounts to justify their conduct, less is known about how body cameras affect police accountability in practice. Drawing from Scott and Lyman's accounts theory framework, this qualitative, exploratory study examines official police accounts as both outcomes of police accountability in practice and as provided in the context of news media coverage of publicly released body-worn camera footage. This allows us to ask the following questions: What types of accounts have police officials provided in news media reports in the context of publicly released BWC footage? And, more generally, what insight might an analysis of police accounts provide about accountability in relation to the implementation of BWCs? A key finding reveals that the timing of police accounts varied quite considerably, and that accounts were usually not static. The findings provide some general insight into what kinds of actions captured on body camera recordings constitute acceptable use of force by officers, even in situations when police actions resulted in death. This study also provides a small empirical window into when and how police officials provide accounts in response to publicly released body camera footage.     

Information-Processing Alternatives for Coping with Manufacturing Environment Complexity

Investment in information systems and technology is often justified as a necessary strategy for coping with the increased complexity and information needs of today/s manufacturing environments. However, the world class manufacturing paradigm suggests that increased complexity is not always necessary to meet the needs of markets and customers. Galbraith/s (1973, 1977) seminal information-processing model is applied to a manufacturing environment, supported by the world class manufacturing paradigm, to test the role of various information-processing alternatives for coping with increased environmental complexity. Moderated regression and multiple discriminant analysis are used to test hypotheses in a sample of 164 manufacturing plants. Environmental complexity was found to be related to manufacturing performance for each of the five dependent variables. This relationship was moderated by at least one information-processing alternative for each dependent variable, including self-contained tasks, lateral relations, and environmental management strategies for reducing manufacturing, supplier, and goal diversity. Investments in information systems and reduction of labor and customer diversity did not moderate this relationship. Practices that were found to be particularly effective in moderating this relationship included the use of multifunctional employees, communication of manufacturing strategy, coordination of decision making, product design simplicity, reduction of parts counts, supervisory interaction facilitation, recruiting and selection for flexible employees, JIT practices, blanket purchase orders, and strong customer relationships.     

Decision-Making and Evidence in Direct Practice

This article presents the results of research designed to explore decision-making by direct practitioners in selected non-profit human service settings. Forty interviews were conducted with workers at front-line, supervisory and higher-management levels. The research questions included; what sources of information are used in decision-making, what variables enhance or impede utilization of evidence-based knowledge in decision-making and what would be important resources for improving availability, access and utilization of evidence-based knowledge in decision-making? Our results indicate that respondents relied most heavily on experience; on their professional values and beliefs, and on an empathic understanding of their clients’ uniqueness. Compared to these sources of information use of research and the professional literature were less enthusiastically endorsed.     

The Great Recession and Welfare State Reform: Is Retrenchment Really the Only Game Left in Town?

By 2010, when the Greek sovereign debt crisis changed into an existential crisis of the euro, all developed democracies entered a phase in which they had to consolidate their budgets, typically implying a politics of austerity. The scholarly literature, as well as the popular press, suggests that – consequently – welfare retrenchment and cost containment became the only games left in town. In this article, we study the welfare state reform measures taken between 2010 and 2012 in four countries characteristic of mature welfare state regimes (liberal, UK; conservative, Germany; social democratic, Denmark; and hybrid, the Netherlands) to examine empirically whether austerity has indeed become the only item left on the policy menu. Our analysis reveals that retrenchment features prominently on the agenda everywhere, but nowhere by itself. While compensation for income loss is rare since 2010, this still happens. More unexpectedly, reforms in line with a social investment agenda (like expansion of child care or active labour market policies) are still being pursued in all our four cases.     

The Income and Health Effects of Tribal Casino Gaming on American Indians

The legalization of American Indian casino gaming in the late 1980s allows examination of the relationship between income and health in a quasi-experimental way. Revenue from gaming accrues to individual tribes and has been used both to supplement tribe members’ income and to finance tribal infrastructure. We assembled annual data from 1988–2003 on tribal gaming, health care access (from the Area Resource File), and individual health and socioeconomic characteristics data (from the Behavioral Risk Factors Surveillance System). We use this information within a structural, difference-in-differences framework to study the effect of casino gaming on tribal members’ income, health status, access to health care, and health-related behaviors. Our difference-in-differences framework relies on before-after comparisons among American Indians whose tribe has at some time operated a casino and with-without comparisons between American Indians whose tribe has and those whose tribe has not initiated gaming. Our results provide identified estimates of the positive effect of gaming on American Indian income and on several indicators of American Indian health, health-related behaviors, and access to health care.