Can ‘refundable’ state Earned Income Tax Credits explain child poverty in the American states?

This study estimates the effect of ‘refundable’ state Earned Income Tax Credits (EITCs) on child poverty from 1994 through 2003. Research results indicate that a refundable state EITC is associated with reductions in child poverty, holding all other variables constant. For example, states with refundable state EITCs have observed a 40% greater reduction in child poverty rates compared to states without refundable state EITCs. This study also discusses policy implications for implementing the ‘refundable’ state EITC.     

Testing the effect of treatment on survival time with an immediate intermediate event

In this paper, we consider testing the effects of treatment on survival time when a subject experiences an immediate intermediate event (IE) prior to death or predetermined endpoint. A two-stage model incorporating both (i) the effects of the covariates on the immediate IE and (ii) survival regression with the immediate IE and other covariates is presented. We study the likelihood ratio test (LRT) for testing the treatment effect based on the proposed two stage model. We propose two procedures: an asymptotic-based procedure and a resampling-based procedure, to approximate the null distribution of the LRT. We numerically show the advantages of the two stage modeling over the existing single stage survival model with interactions between the covariates and the immediate IE. In addition, an illustrative empirical example is provided.     

Shifting strategy for geometric graphs without?geometry

We give a simple framework which is an alternative to the celebrated and widely used shifting strategy of Hochbaum and Maass (J. ACM 32(1):103?C136, 1985) which has yielded efficient algorithms with good approximation bounds for numerous optimization problems in low-dimensional Euclidean space. Our framework does not require the input graph/metric to have a geometric realization??it only requires that the input graph satisfy some weak property referred to as growth boundedness. Growth bounded graphs form an important graph class that has been used to model wireless networks. We show how to apply the framework to obtain a polynomial time approximation scheme (PTAS) for the maximum (weighted) independent set problem on this important graph class; the problem is W[1]-complete. Via a more sophisticated application of our framework, we show how to obtain a PTAS for the maximum (weighted) independent set for intersection graphs of (low-dimensional) fat objects that are expressed without geometry. Erlebach et al. (SIAM J. Comput. 34(6):1302?C1323, 2005) and Chan (J. Algorithms 46(2):178?C189, 2003) independently gave a PTAS for maximum weighted independent set problem for intersection graphs of fat geometric objects, say ball graphs, which required a geometric representation of the input. Our result gives a positive answer to a question of Erlebach et al. (SIAM J. Comput. 34(6):1302?C1323, 2005) who asked if a PTAS for this problem can be obtained without access to a geometric representation.     

An approximation to the poly-t distribution

This investigation examines an approximation to the poly-t distribution, which often occurs in the Bayesian analysis of a linear model. The approximation allows one to compute the mean vector and dispersion matrix of any k/0 multivariate poly-t distribution in such a way that only univariate and bivariate numerical integrations are required. A numerical study depicts the advantages and disadvantages of the approximation.     

Children’s Participation in Child Protection Practice in Ghana: Practitioners’ Recommendations for Practice

Abstract

The United Nations Convention on the Rights of the Child (UNCRC) includes provisions to ensure that children and young people participate in decisions affecting their lives. Ghana ratified the convention in 1990 making a commitment to review its child protection policies and legislation in compliance with provisions in the UNCRC. Yet, national policies and legislation do not include practical guidelines to promote children’s participation in the child protection process. Thus, this qualitative study presents findings from in-depth interviews with 15 child protection practitioners on their views about some practical guidelines to promote children’s participation in child protection. Data from the interviews were subjected to constructivist grounded theory analysis. The study findings revealed the age of the child, separate room for children, creating a friendly environment and education as some important factors for practitioners to consider in promoting participatory practices for children. Child protection policies and legislation in Ghana should include these suggestions to ensure that children’s views are heard in the child protection process. To realize the overarching goal of achieving active child participation in child protection, further research may focus on the views of parents and children on how to develop culturally relevant strategies to promote child participation.     

The Roles of Relationship With Family and Life Values in the Housing Choices of Elderly Koreans

Housing choice is a significant factor in forecasting the housing market. In an aging population in which the wealth of the elderly is found mostly in housing equity, the housing choices of the elderly are an increasingly important yet underrepresented research theme. In addition to lower income and greater leisure time, the change of family relationships of the elderly are likely to result in significantly different housing choices from those made by younger groups. This article investigates the roles of family relationships and life values in the housing choices (tenure and location) of elderly Koreans. Subjective life satisfaction and propensity for expenditure were found to be significant determinants in the choice of housing tenure, whereas the choice of location is influenced by circumstances, especially their relationship with their children. These findings provide new insight into the Asian housing market, in which the elderly of traditional large families have a children-oriented mindset and maintain a geographic proximity with their children despite a growing trend toward family nuclearization.