Repeat and Non-returning Volunteers: The Promise of Episodic Events for Volunteer Recruitment and Retention

VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - In this article, we are concerned with the recruitment potential of one-off episodic events for attracting and retaining...     

The Emerging Problems of Alcohol and Substance Abuse in Late Life

Treatment of substance abuse among older adults will become increasingly important as the number of aged Americans increases. The abuse of psychoactive substances is a major contributor to excess morbidity, mortality, and homelessness among persons of all ages and socioeconomic strata regardless of race or ethnicity. Alcohol and tobacco account for the majority of substance abuse-related death and disability in the United States; the former through cerebrovascular and hepatic disease, accidents and violence, the latter through chronic pulmonary disease and malignancy. Patterns of substance abuse in late life are substantially different from those observed among younger adults. However, treatment may be less challenging. Effective diagnosis and treatment requires a nonpunitive, supportive, but persistent approach. This means the capacity to collect a substance intake history and the ability to formulate a treatment plan or referral strategy to an addiction specialist or residential treatment setting. It is also important for the practitioner to manage negative feelings toward patients who decline treatment or who are chronic abusers.     

On the Historical Consciousness of Contemporary Students

The article presents the results of a study of the historical consciousness of contemporary students in comparison with other similar research, and considers, in the context of the young generation, the status of the past, different sources of knowledge about the past, historical interests, the specificity of historical identification, the role of institutions in the views of young people, and ethnocentrism. It is concluded that the historical consciousness of students today has a contradictory nature, which is associated with the loss of the fundamental role of tradition as a basic value of historical consciousness and orientation, as well as a loss of interest in family history.     

Multi-depot vessel routing problem in a direction dependent wavefield

Considerable research has been done on the vehicle routing problem and its variants; however only limited amount of existing work deals with possible environmental conditions and their effects on the vehicle routes. This paper presents the multiple-depot vehicle routing problem for surface vessels, where the vehicles must traverse a time-invariant direction-dependent medium. Our model captures environmental effects and vessel dynamics on the considered paths. Three heuristic solution methods are developed and tested on simulated scenarios. The first approach exactly solves an approximate formulation of the problem, the second approximately solves an approximate problem formulation, while the third approximately solves the exact problem. Performance of the algorithms are compared to assess the tradeoff between computational cost and quality of the found solutions.     

The edge of reason: A thematic analysis of how professional financial traders understand analytical decision making

This study uses thematic analysis to investigate accounts of Type 2 (analytical, rational and reflective) decision-making processes in professional financial traders working in the City of London. Previous studies have focused on using qualitative methods to examine trader understanding of Type 1 decision-making (intuition and ‘gut feeling’). No published study has investigated how traders view Type 2 decisions. Findings from semi-structured interviews with 14 traders revealed two overarching themes derived from four subthemes. The first overarching theme (‘Knowledge gap’) demonstrated that traders do not find their analytical decision-making processes as accessible as dual-process theory predicts. In particular, traders failed to label processes such as reading research or evaluating data as analytical. In contrast, they viewed Type 2 decisions in a ‘saviour’ role where these processes offered traders psychological or emotional support during loss making periods. The implications of these findings are discussed with respect to the decision-training of traders, their management, and practice.     

Ethnic Origins and Religious Transformations in the Afro-Colombian Muslim Community of Buenaventura

The aim of this article is to analyse the origins and transformations of a Muslim community in western Colombia. The history of this small religious group of Afro-Colombians is presented over a period divided into four phases. This division is based on four dominant interpretations of Islamic doctrines adopted by the majority of the group over a period of time. These changes were not only due to religious motivations but also due to changes in the social milieu and the need for taking advantage of emerging opportunities. The religious conversion of Afro-Colombians to Islam took place within the complex socio-political context of the Colombian conflict which began in mid-1960s and is still ongoing. The adoption of this new religious perspective did not evolve in an isolated manner, rather, it transformed the identity of the community by strengthening the value of ethnic differences in a place of segregation. In this context, this paper analyses the role of religion as an important element in the construction of ethnic identity. It is also important to recognize that this cultural negotiation happens at the margins of the dominant society, which views Afro-Colombian minorities negatively or simply ignores their presence.     

Local Linear GMM Estimation of Functional Coefficient IV Models With an Application to Estimating the Rate of Return to Schooling

We consider the local linear generalized method of moment (GMM) estimation of functional coefficient models with a mix of discrete and continuous data and in the presence of endogenous regressors. We establish the asymptotic normality of the estimator and derive the optimal instrumental variable that minimizes the asymptotic variance-covariance matrix among the class of all local linear GMM estimators. Data-dependent bandwidth sequences are also allowed for. We propose a nonparametric test for the constancy of the functional coefficients, study its asymptotic properties under the null hypothesis as well as a sequence of local alternatives and global alternatives, and propose a bootstrap version for it. Simulations are conducted to evaluate both the estimator and test. Applications to the 1985 Australian Longitudinal Survey data indicate a clear rejection of the null hypothesis of the constant rate of return to education, and that the returns to education obtained in earlier studies tend to be overestimated for all the work experience.