Cyclic tournaments and cooperative majority voting: A solution

A new solution concept is axiomatically characterized for tournaments that represent cooperative majority voting. The predicted set of outcomes lies inside the top-cycle set, the uncovered set, and the Banks set.This research was supported by NSF grants SES 8612120 and SES 8896228. I thank Georges Bordes, Gary Cox, Bhaskar Dutta, Richard McKelvey, Nicholas Miller, Emerson Niou, Peter Ordeshook, and Peyton Young for helpful comments. Niou is responsible for the example in Sect. 4. Presented at the Public Choice Society Meetings, Tucson, March 1987, and at the Jacob Marschak Interdisciplinary Colloquium on Mathematics in the Behaviorial Sciences, UCLA, October 1988.     

A group majority voting model of public good provision

A model of public good provision by majority rule selection incorporating the behavior of rational group voting is formulated. Two probability maximizing candidates are assumed. If voters are risk averse in public sector preferences, then a unique symmetric (both candidates offering identical platforms) equilibrium exists. If certain additional conditions hold on the group cost functions of political support, this equilibrium will lie at the public good levels which maximizes the sum of voter utility. It is further demonstrated that it is unlikely for those conditions to be satisfied and therefore more realistic asymmetric equilibria with positive voter turnout is predicted.This paper is based on an essay of a dissertation submitted to Tulane University under the supervision and invaluable assistance of Steven Slutsky, Jonathan Hamilton, and William Oakland. The advice of Gerald Whitney, Michaels Johnson, and an anonymous referee is also gratefully acknowledged. All errors remain the authors.     

The Treaty of Nice and qualified majority voting

We analyse and evaluate three decision rules for the Council of Ministers of the EU, which are prescribed by the `definitive form' of the Treaty of Nice. The first will apply from 2005 to the present 15-member EU, if it will not have been enlarged by then. The second or third will apply to an enlarged 27-member EU. We conclude that the first of these is an improvement on the current decision rule; but the other two have extremely undesirable features. Received: 23 February 2001/Accepted: 26 March 2001     

Special majority rules and the existence of voting equilibria

This paper is concerned with voting rules in which one alternative defeats a second alternative if and only if it is preferred to the second alternative by a pre-specified proportion of the individuals who have strict preferences on the pair. In particular, the paper focuses on the potential of two alternative lower bounds (for the proportion used) as tools for studying the existence of voting equilibria (i.e., for studying the existence of alternatives which cannot be defeated). It establishes that there are certain important contexts where one of the two bounds does not directly reveal whether any voting equilibria exist, but the other one does.     

The probability of an undominated central voter in 2-dimensional spatial majority voting

Place a voter v in the plane and scatter additional voters at random about v. What are v's chances of being undominated? When the number of voters, n, is even, this probability is known to be nonzero [5]. Here we prove that the exact probability is 2^?(n?2).     

Opting out while fitting in: How residents make sense of assisted living and cope with community life

This paper explores how assisted living residents construct personal understandings of congregate settings through the stories they tell. Using the narratives of Dorothy and Estelle, two 91-year-old participants, we examine how linkages between past experiences and present conditions enable residents to make sense of assisted living and cope with membership in a community comprised of diverse interests, backgrounds, and impairments. Our narrative analysis focuses on how individuals strive for continuity or new meaning in the face of chaos or disruption. Both participants characterize life in the facility in terms of prior personal and professional experiences that then inform their current behavior and feelings toward fellow residents. Although they profess to have little in common with these residents, both constitute assisted living in ways that enable them to enjoy their lives within the facility. Implications for studies using narrative analysis to examine transition into and satisfaction with congregate living are examined.     

The best voting method: A review of “voting procedures” by Michael Dummett

Voting procedures, Clarendon Press, Oxford 1984.     

Opting Back In: The Influence of Time at Home on Professional Women's Career Redirection after Opting Out

Limited research on professional women's labour force re‐entry after a career break (so‐called ‘opting out’) finds that women redirect away from former careers. Little is known about why this occurs. Our study, based on in‐depth interviews with 54 at‐home mothers, extends prior research to address this question. We find that among women who intended to return to work (who constitute the majority), most planned to pursue alternative careers, typically in traditionally female‐dominated professions or were uncertain about their career direction; few planned to return to their former employers. The reasons for this redirection were women's negative experiences in family inflexible occupations, skill depreciation and perceived age discrimination. Equally or more important, however, was their adaptation to new constraints and opportunities at home (such as increased involvement in mothering and community work), which engendered an aspirational shift towards new, care‐oriented professions that were lower paid and had lower status. We discuss the policy implications of these findings.     

Constitutions, voting and democracy: A review

This review of William Riker's work suggests that his interest in rational choice theory was based on his desire to understand profound constitutional transformation in U.S. political history. Although he argued that “anything can happen in politics,” his use of the notion of heresthetic allowed him to focus on key contingent events. Indeed his later work added depth to his inductive generalizations on the nature of “federal bargains” and coalition formation.  Recent work by Austen-Smith and Banks, Merrill and Grofman, and Lijphart is also discussed in the light of Riker's earlier ideas on voting and democracy. Received: 25 February 2000/Accepted: 16 March 2000     

Value provided by interfamily economic exchange of goods and services in two cultures

The value of goods and services provided through interfamily economic exchange is examined from a household survey. The existence of an exchange system in society was documented. Over half of the respondents reported that economic transfers between families were important to the quality of their life. Estimated values varied with personal health conditions, importance attached to providing goods and services, years of residence in the community, primary recipient of services, ethnic culture, sex of respondent, and type of service provided. Estimated values can be used for calculating economic loss in community disruption and relocation, measuring family full income, and estimating the importance of nonmarket economic activity in society.The study contributes to interregional Agricultural Experiment Station Research Project NC-128 Quality of Life as Affected by Area of Residence. Cooperating States: Arizona, California, Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, Nevada, and Texas.Dr. Williams is an Associate Professor in the Department of Consumer Sciences and Retailing, Purdue University, West Lafayette, Indiana 47907. Her Ph.D. was received from Purdue in Family Economics and Management. Current research areas are income adequacy, economic security, financial problems, and financial counseling.     

Ecohydrological model for the quantification of ecosystem services provided by urban street trees

Urban green spaces have been recognized as an important source of ecosystem services, whose quantification requires the determination of quantities related to energy, water, carbon and soil nutrient content. In this paper we propose a stochastic ecohydrological model that couples two existing models for water and nutrients in urban soil at the single street-tree scale. The model input are rainfall and irrigation, for water, and deposition and fertilization, for nitrogen, while the output are evapotranspiration, runoff and deep percolation, for water, and plant uptake and leaching, for nitrogen. The various terms are related to the amount of paved and impervious surfaces that surround the tree trunk and regulate the water and nutrient fluxes in and out the soil. Particular attention is paid to the effects of seasonal variations on plant water and nutrients through a temporal variation of the hydrologic variables (i.e., temperature and rainfall intensity and frequencies). The average model outputs are preliminarily compared with the scant existing literature data, supporting the model application to cities with different climatic conditions. The model results are used to estimate the potential for ecosystem services like tree cooling effects, soil carbon sequestration or storm-water management. Because of the minimal structure of the proposed model, it requires a very low amount of data, while accounting for the stochastic input of rainfall. In the context of climate change and increasing urbanization, the model may offer useful indications to urban planners to enhance ecosystem services while minimizing irrigation, fertilization and their related costs.     

Occupational rehabilitation services provided by a community workers health centre in Hong Kong: a case study

Ergonomics is commonly known as "the scientific study of human work" [14, p. 3] and "the application of scientific information concerning human beings to the design of objects, systems, and environments" (p. 4). The American Occupational Therapy Association defines occupational therapy as "skilled treatment that helps individuals achieve independence in all facets of their lives. It gives people the 'skills for the job of living' necessary for independent and satisfying lives [1]." Both professions share common backgrounds. Occupational therapy has been involved in health care and ergonomics is looking for its place in the health care field.     

Poverty to more poverty: An evaluation of transition services provided to adolescent girls from two institutions in Zimbabwe

Adolescent girls leaving institutional care in Zimbabwe need transition services and programmes to counter the socio-economic risks they face in their transitions to adulthood and out of institutional care. Using the sustainable livelihood approach (SLA), this study evaluated the services/support being provided by key transition service providers (the government and institutions) to meet the livelihood needs of adolescent girls transitioning from institutions A and B in Harare, Zimbabwe. Face to face interviews were conducted with 32 adolescent girls (sixteen inside institutions, aged 15–18, and sixteen discharged from institutions, aged 18–21). Key informant interviews were held with superintendents of the respective institutions and the district social services officer from the Department of Child Welfare and Probation Services. Findings indicate that adolescent girls have access to similar assets inside care. Due to non-provision of services/support by institutions and minimal services/support provision by the government, care leavers lose larger stocks of assets, making them poorer than their counterparts in care. This study concludes that the services and support being provided by institutions A and B and the Department of Child Welfare and Probation Services are not adequate in meeting the livelihood needs of adolescent girls and hence, result in negative livelihood outcomes beyond care. As a poverty reduction strategy, this study recommends the allocation of adequate resources for the provision of comprehensive services/support that promotes the achievement of sustainable livelihoods during and after care.     

A continuous rating method for preferential voting: the complete case

A method is given for quantitatively rating the social acceptance of different options which are the matter of a complete preferential vote. Completeness means that every voter expresses a comparison (a preference or a tie) about each pair of options. The proposed method is proved to have certain desirable properties, which include: the continuity of the rates with respect to the data, a decomposition property that characterizes certain situations opposite to a tie, the Condorcet?CSmith principle, and clone consistency. One can view this rating method as a complement for the ranking method introduced in 1997 by Markus Schulze. It is also related to certain methods of cluster analysis and one-dimensional scaling.     

Condorcet cycles? A model of intertemporal voting

An intertemporal voting model is examined where, at each date, there is a pairwise majority vote between the existing chosen state and some other state, chosen randomly. Intertemporal voting simplifies the strategic issues and the agenda setting is as unrestricted as possible. Voters adopt Markov strategies. The possibility of cycles is examined, both in the intertemporal extension to the Condorcet paradox and in more general examples. The set of possibilities is rich, as is demonstrated by an exhaustive study of a three-person, three-state world. Equilibrium in pure strategies may fail to exist but a weakening of the equilibrium concept to admit probabilistic voting allows a general existence result to be proved. The analysis leads to the development of a dominant state which extends the notion of a Condorcet winner.     

The hidden majority/minority consensus: Minorities show similar preference patterns of immigrant support as the majority population

The acceptance of new arrivals has become an important topic regarding the social cohesion of the receiving countries. However, previous studies focused only on the native population's drivers of attitudes towards immigrants, disregarding that immigrant-origin inhabitants now form a considerable part of the population. To test whether the drivers for the willingness to support immigrants are the same for natives and immigrants and their descendants, we rely on a vignette study conducted in a representative German online panel (N = 3149) which contains an overrepresentation of immigrant-origin respondents. We presented participants with three vignettes of potential immigrants, varying, amongst other factors, economic prospects, safe and war-ridden countries of origin (to capture deservingness), as well as religious identity. While we find that minority members are generally slightly more welcoming towards immigrants than majority members, at their core are the same factors that drive attitudes to immigrants in both groups: economic cost, cultural similarity, and deservingness. However, we observe differences at the margins: Immigrant-origin respondents take into account economic prospects to a lesser degree than majority members do, and by trend, they are less likely to distinguish between immigrants from war-ridden and safe countries of origin. Furthermore, we can show that the preference for immigrants with the same religious identities not only occurs among majority members but also among minority members.     

A note on restricted majority rules: invariance to rule selection and outcome distinctiveness

Recently, Karotkin (1993) has shown that in the symmetric uncertain dichotomous choice model the set of restricted majority rules (RMRs) is special in the sense that a member of this family of rules is always the worst rule among the potentially optimal weighted majority rules (WMRs). In the current paper we establish two additional special properties of RMRs. First, given a particular configuration of the group members' decisions, the collective choice is invariant to the selection of WMRs if it is invariant to the selection of RMRs. Second, given a particular decision profile, a potentially optimal WMR can result in a distinctive collective choice which is different from the choice of any other potentially optimal WMR, if and only if it is a RMR.     

A characterization of strategy-proof voting rules for separable weak orderings

We consider the problem of choosing a subset of a finite set of indivisible objects (public projects, facilities, laws, etc.) studied by Barberà et al. (1991). Here we assume that agents preferences are separable weak orderings. Given such a preference, objects are partitioned into three types, goods, bads, and nulls. We focus on voting rules, which rely only on this partition rather than the full information of preferences. We characterize voting rules satisfying strategy-proofness (no one can ever be better off by lying about his preference) and null-independence (the decision on each object should not be dependent on the preference of an agent for whom the object is a null). We also show that serially dictatorial rules are the only voting rules satisfying efficiency as well as the above two axioms. We show that the separable domain is the unique maximal domain over which each rule in the first characterization, satisfying a certain fairness property, is strategy-proof. I am grateful to Professor William Thomson for helpful comments and suggestions. I also thank Professor John Duggan, Christopher Chambers, and seminar participants in Department of Economics, University of Rochester. I thank anonymous referees for their detailed comments and suggestions that helped me a great deal to develop the earlier version of this paper. All remaining errors are mine.     

Sophisticated voting rules: the case of two tournaments

A voting rule maps voter preferences into outcomes, and is called sophisticated if there exists a voting tree whose sophisticated outcomes coincide with the voting rule for every voter preference. As yet, no complete characterization of such rules is available. In this paper, we provide an important step toward this characterization by completely solving the problem when there are two possible sets of voter preferences.The second author was supported by the Office of Naval Research, Grant N00014-92-J-1387.