Combined survival analysis of cardiac patients by a Cox PH model and a Markov chain

The control and treatment of dyslipidemia is a major public health challenge, particularly for patients with coronary heart diseases. In this paper we propose a framework for survival analysis of patients who had a major cardiac event, focusing on assessment of the effect of changing LDL-cholesterol level and statins consumption on survival. This framework includes a Cox PH model and a Markov chain, and combines their results into reinforced conclusions regarding the factors that affect survival time. We prospectively studied 2,277 cardiac patients, and the results show high congruence between the Markov model and the PH model; both evidence that diabetes, history of stroke, peripheral vascular disease and smoking significantly increase hazard rate and reduce survival time. On the other hand, statin consumption is correlated with a lower hazard rate and longer survival time in both models. The role of such a framework in understanding the therapeutic behavior of patients and implementing effective secondary and primary prevention of heart diseases is discussed here.     

Tree-structured subgroup analysis for censored survival data: Validation of computationally inexpensive model selection criteria

The performance of computationally inexpensive model selection criteria in the context of tree-structured subgroup analysis is investigated. It is shown through simulation that no single model selection criterion exhibits a uniformly superior performance over a wide range of scenarios. Therefore, a two-stage approach for model selection is proposed and shown to perform satisfactorily. Applied example of subgroup analysis is presented. Problems associated with tree-structured subgroup analysis are discussed and practical solutions are suggested.     

An Efficient and Robust Design for Transshipment Networks

Transshipment, the sharing of inventory among parties at the same echelon level of a supply chain, can be used to reduce costs. The effectiveness of transshipment is in part determined by the configuration of the transshipment network. We introduce chain configurations in transshipment settings, where every party is linked in one connected loop. Under simplifying assumptions we show analytically that the chain configuration is superior to configurations suggested in the literature. In addition, we demonstrate the efficiency and robustness of chain configurations for more general scenarios and provide managerial insights regarding preferred configurations for different problem parameters.     

Asset Building in Rural Communities: The Experience of Individual Development Accounts*

Abstract This study examines the unique experiences of low‐income rural participants in an asset building program‐the Individual Development Account. Using data from the American Dream Demonstration, this study addresses three main questions: (1) What are the individual characteristics associated with saving outcomes among rural IDA participants? (2) What are the program characteristics associated with savings among rural participants? (3) What are the policy implications for supporting asset building in rural areas? To answer these questions we conduct an Ordinary Least Squares regression analysis. The results suggest that low‐income rural participants have the ability and willingness to save toward the accumulation of assets in IDAs. Looking at individual characteristics, home ownership appears to be an important predictor of savings. In addition, this study suggests that program characteristics (financial education, peer group meetings, match rate, direct deposit, and monthly saving target), not merely individual characteristics, are important in explaining saving performance for this group.     

Evaluating the Move to a Linear Tax System in Germany and Other European Countries

This paper proposes a comparison of the results of tax policy analysis obtained on the basis of unitary and collective representations of the household. We first generate labour supplies consistent with the collective rationality, by use of a model calibrated on microdata as described in Vermeulen et al. [Collective Models of Household Labor Supply with Nonconvex Budget Sets and Nonparticipation: A Calibration Approach (2006)]. A unitary model is then estimated on these collective data and unitary and collective responses to a tax reform are compared. We focus on the introduction of linear taxation in Germany. The exercise is replicated for other European countries and other topical reforms. Distortions due to the use of a unitary model turn out to be important in predicting labour supply adjustments, in the design of tax revenue neutral reforms, and in predicting a reform’s welfare implications.

What's Your Story? Listening to the Stories of Mothers from Multi-Problem Families

The use of a narrative approach in research and treatment enables a close-up view of the world of the client from his/her point of view. This approach opens a door to a differential understanding of states of distress and is particularly relevant with regard to distressed populations for whom verbal communication is the natural means of expression and much richer than any more formal means. The following article offers narrative analyses of stories of three women, mothers of multi-problem families, whose children's development is at risk. The stories were recorded during a research project which studied the responses of the participating women in an intervention program called Yachdav. The narrative analysis reveals the women's subjective perception of their situation of stress and of the methods of assistance available to them. The article examines the contribution of the narrative approach to the understanding of the point of view of the distressed segments of the population as a means of creating an alliance in assistance reception relations.     

Can't Buy Me Love: Gift-Giving Among Members of Criminal Organizations

This paper problematizes gift relations in criminal organizations. It adopts a symbolic interaction perspective to focus scholarly attention on the way in which actants skillfully maneuver within the social expectations inherent in gift-giving relations. The study is based on insights from twenty interviews with ex-convicts and ten interviews with police officers or associates, and an in-depth analysis of memoirs, police reports, and newspaper articles. Our study expands the scope of symbolic interactionism by considering how the exchange of gifts and favors is emotionally stylized to achieve both social and operative goals. We aim to carefully deconstruct the performance of gift-giving and favor exchange in Israeli crime organizations, to understand how it is orchestrated to elicit genuine feelings among givers and recipients, as well as to control the use of violence. Finally, we identify gift-giving as a double-edged sword designed to lure recruits into a network of binding obligations, only to form a durable system of credit and debt wherein any transgressions are strictly punished.     

Liquid advocacy: Social welfare advocacy in neoliberal times

This article examines current inconsistent trends in social welfare advocacy literature. Some studies show evidence of widespread engagement in advocacy by nonprofit organisations, while other studies conversely offer evidence of limited advocacy activities. Another controversial aspect stems from the question whether governmental funding undermines the extent to which nonprofits engage in advocacy. We argue that these findings reflect the contradictory impact of neoliberal governance on social welfare advocacy. The article highlights and discusses three interrelated components of neoliberalism and their impact on current social welfare advocacy: marketisation, precariousness and commodification. Neoliberalism has propelled a model of market-driven civil society that has remade the practice of social welfare advocacy in contradictory ways. With its complex rationales, neoliberalism has simultaneously undermined the ability of nonprofits to engage in advocacy but in a paradoxical way has also created conditions that induce these organisations to practice advocacy. Implications for practice and research on social welfare advocacy are discussed.