The pits and the core: Simple collective decision problems with concave preferences

This essay extends the theory of simple collective decision problems to spatial games in which (contrary to the traditional assumption) each agent's preferences are concave, in the sense that the alternatives that the agent does not prefer to any particular reference alternative together constitute a convex set. Such concave preferences might characterize decision problems in which, say, a site must be selected for some obnoxious facility, such as a prison, garbage dump, or facility for managing hazardous materials. The results indicate that, under these conditions, the (weak -)core can be structurally unstable, changing discontinuously with apparently minor perturbations of the decision problem. The main theorem identifies a curious property of the core when the set of feasible alternatives is compact and convex and each agent's preferences are strictly concave. Namely, a point in the feasible set's interior can belong to the core only if there is no feasible alternative that makes every member of any winning coalition strictly worse off. In this sense, an interior point belongs to the core only if it lies in the pits.A preliminary version of this essay was presented at the West Coast Conference on Small Groups Research, Stanford University, 17 April 1985, and the Experimental Social Choice Workshop, Utah State University, Logan, Utah, 20–21 June 1985. This material is based on work supported by grants from the National Science Foundation (Grants SES 83-12123 and SES 84-10094), the Real Estate Center and Department of Decision Sciences of The Wharton School, and the Research Fund of the University of Pennsylvania.     

Summonsing Criminal Desistance: Convicted Felons’ Perspectives on Jury Service

This exploratory study is the first to examine how convicted felons view the jury process and their role in that process. Data derived from interviews with former and prospective felon‐jurors in Maine, the only US jurisdiction that does not restrict a convicted felon's opportunity to serve as a juror, reveal that participants displayed an idealized view of jury service, stressing a commitment to serve conscientiously. Additionally, inclusion in the jury process affirmed their transitions from “offenders” to “nonoffenders.” In response, participants exhibited a sense of particularized self‐worth, emphasizing that negative experiences with the criminal justice system make one a more effective juror. In sum, this study suggests that among convicted felons, inclusion in the jury process may prompt conformity with the “ideal juror” role, facilitate prosocial identity shifts by mitigating the “felon” label, and help former offenders to find personal value.     

Evaluation of the south carolina comr/cunity long-term care medicaid waiver for the elderly and disabled

Medicaid waivers play an important role in the health policy process. Various health care policy initiatives have encouraged states to experiment ith their Medicaid programs by expanding coverage to populations not traditionally covered by Medicaid, or by delivering Medicaid services in non traditional ways. Lessons learned by individual states' Medicaid waivers could be an important part of the health care reform debate. This paper presents an evaluation of a Medicaid waiver operating in South I Carolina. The South Carolina Community Long-term Care Waiver for the Elderly and Disabled is evaluated for cost effectiveness, quality of care, and client satisfaction. This evaluation shows that the waiver is highly effective in offering individuals who are medically and financially eligible for Medicaid supported nursing home care a viable, cost effective, high quality alternate to institutionalization.     

The Global Information Infrastructure Revisited

Ideally, the internet will eventually evolve into a global information infrastructure, which, by creating a global information marketplace, will narrow the poverty gap and eliminate many of the existing geographic barriers to prosperity and equality. On the other hand, there is a risk that the internet will concentrate economic activity among the richer countries and thus accentuate the existing divisions between North and South. Which of these scenarios is the more likely will depend to a large extent on whether developing countries are able to gain access to low-cost forms of information technology. Using numerous examples of such technology that already exist in the Third World, we conclude that there is in fact more scope for optimism regarding the Global Information Infrastructure than is commonly realised.     

Assessing the Impact of Leather Industries on Groundwater Quality of Vellore District in South India Using a Geochemical Mixing Model

Abstract

Deterioration of groundwater quality is one of the most critical issues in twenty-first century. The direct relations of water with all the living beings make it an extremely important commodity. Sources of pollution may be of natural or anthropogenic origin. Nowadays anthropogenic sources of pollution are much more than natural sources. India has 1083 tanneries, in which 577 are in Tamil Nadu which accounts for 44% of the total production of India. Vellore district has an indispensable place in the list. Over the 30–40?years groundwater around tanneries has become seriously polluted.