A geometric approach to revealed preference via Hamiltonian cycles

It is shown that a fundamental question of revealed preference theory, namely whether the weak axiom of revealed preference (WARP) implies the strong axiom of revealed preference (SARP), can be reduced to a Hamiltonian cycle problem: A set of bundles allows a preference cycle of irreducible length if and only if the convex monotonic hull of these bundles admits a Hamiltonian cycle. This leads to a new proof to show that preference cycles can be of arbitrary length for more than two but not for two commodities. For this, it is shown that a set of bundles satisfying the given condition exists if and only if the dimension of the commodity space is at least three. Preference cycles can be constructed by embedding a cyclic $(L-1)$ -polytope into a facet of a convex monotonic hull in $L$ -space, because cyclic polytopes always admit Hamiltonian cycles. An immediate corollary is that WARP only implies SARP for two commodities. The proof is intuitively appealing as this gives a geometric interpretation of preference cycles.     

The Maine Savvy Caregiver Project: Translating an Evidence-Based Dementia Family Caregiver Program Within the RE-AIM Framework

This article presents findings of a 3-year Savvy Caregiver Program translational study designed with the RE-AIM framework to create a statewide sustainable infrastructure and improve dementia family caregiver outcomes in one rural state. The RE-AIM dimensions—reach, effectiveness, adoption, implementation and maintenance—were evaluated using mixed methods. The program reached 770 caregivers and 87.7% (n = 676) participated in the study with 60.5% (n = 409) residing in rural locations. Participants demonstrated improved confidence, fewer depressive symptoms, and better managed their situation. Trainer resources, partnerships, and adequate planning were essential for program adoption and sustainability. Implications for replication are discussed.     

CARMA(p,q) generalized random processes

There is now a vast literature on the theory and applications of generalized random processes, pioneered by Itô (1953), Gel’fand (1955) and Yaglom (1957). In this note we make use of the theory of generalized random processes as defined in the book of Gel’fand and Vilenkin (1964) to extend the definition of continuous-time ARMA(p,q  ) processes to allow q≥p$q\ge p$, in which case the processes do not exist in the classical sense. The resulting CARMA generalized random processes provide a framework within which it is possible to study derivatives of CARMA processes of arbitrarily high order.     

THE EFFECT OF BENEFIT SANCTIONS ON THE DURATION OF UNEMPLOYMENT

This paper investigates the effectiveness of unemployment benefit sanctions in reducing unemployment duration. Swiss data on benefit sanctions allow us to separate the effect of a warning that a person is not complying with eligibility requirements from the effect of the actual enforcement of a benefit sanction. Moreover, public employment services are given substantial leeway in setting the monitoring intensity. Results indicate that both warning and enforcement have a positive effect on the exit rate out of unemployment, and that increasing the monitoring intensity reduces the duration of unemployment of the nonsanctioned. (JEL: J64, J65, J68)     

Teaching Sociological Practice: Starting with Something Special

A scholar-practitioner might want to decide what concept, value, or framework in sociological practice is particularly important for students to know at the very beginning of a course. This special emphasis approach is detailed using four examples: cultural competence in a course on mediation skills; humanism in courses or presentations on social theory, ethics, social planning, or intervention; participatory action research in a social science research course; and empowerment in intervention, community, social planning, or social policy courses. Clinical and applied sociologists are invited to consider an up front and personal approach in at least some of their courses and to choose and explicitly emphasize, in their own special way, an important value, concept, or perspective at the beginning of a course.     

Foster Care and Permanency an Analysis of the Context for Practice

This paper is an historical analysis of foster care, exploring its linkage with the concept of permanency in the United States (a major force in defining the direction of foster care policy) and in Australia. Use of the political economy and feminist approaches highlights the extent to which the child welfare system is based on policies which enhance social inequality, while promoting a particular ideal of the nuclear family which dichotomises mothers as good or bad.     

The reinterpretation of finitude: An introduction to three articles on the philosophy of aging

Whereas the expected problems of population aging are discussed extensively in the mass media, with a strong emphasis on the costs of pensions and care in the future, philosophy has remained virtually silent about the many aspects of aging and gerontology relevant to the discipline. However, aging is not a new topic in philosophy; it only has to be reintroduced. Although the three authors offer different perspectives on aging, there is a common effort to reinterpret the fundamental experience of finitude in the light of aging.     

Long-term effects of teaching behavioral strategies for managing persistent auditory hallucinations in schizophrenia

1. Attendance at a 10-week class designed to teach behavioral management strategies to people with schizophrenia was effective in reducing some of the negative characteristics of auditory hallucinations for 12 months and in reducing anxiety for 9 months after completion of the class. 2. The sustained improvement experienced by class participants was characterized by their voices being less frequent and more mumbled and the participants feeling more in control, less distractible, and less anxious. 3. Participants recommended that other mental health consumers take similar classes to learn how to better manage their voices. 4. Monthly support groups may help participants maintain gains lost during the follow-up period.