INQUIRY

The following interview with Awash Teklehaimanot was conducted in June 2005. Dr. Teklehaimanot is Director of the Malaria Program at Columbia University and a member of the Task Force on Malaria for the UN Millennium Project. He is a senior staff member of the World Health Organization (WHO) in Geneva, where he provides leadership in the development of the global Roll Back Malaria program. Dr. Teklehaimanot has extensive international experience in public health with particular focus on Africa. He provides technical support to malaria-endemic countries, coordinates a number of WHO-funded research activities in Africa, and spent several years as the director of Ethiopia's National Malaria Control Program. He is a professor of clinical epidemiology at Columbia University's Mailman School of Public Health, and has been lecturing at the Harvard School of Public Health since 1992.     

Optimal designs for non-competitive enzyme inhibition kinetic models

In this paper, we present a new method for determining optimal designs for enzyme inhibition kinetic models, which are used to model the influence of the concentration of a substrate and an inhibition on the velocity of a reaction. The approach uses a nonlinear transformation of the vector of predictors such that the model in the new coordinates is given by an incomplete response surface model. Although there exist no explicit solutions of the optimal design problem for incomplete response surface models so far, the corresponding design problem in the new coordinates is substantially more transparent, such that explicit or numerical solutions can be determined more easily. The designs for the original problem can finally be found by an inverse transformation of the optimal designs determined for the response surface model. We illustrate the method determining explicit solutions for the D-optimal design and for the optimal design problem for estimating the individual coefficients in a non-competitive enzyme inhibition kinetic model.     

Attitudes Toward Intergenerational Redistribution in the Welfare State

Which motivations explain attitudes toward intergenerational redistribution? This study presents two perspectives. The first one is demographic aging where individuals’ attitudes are influenced by short- and long-term self-interest. The second perspective is socialization into a certain institutional context where people internalize the reciprocity and the deservingness norms. Besides investigating the impact of these motivations, the empirical analysis assesses their relative importance for explaining attitudes toward intergenerational redistribution. The ordinary least-squares regression draws on data of the “Attitudes Toward The Welfare State” survey that was conducted in 2008 in Germany. The study investigates the working age group’s attitude toward relative governmental spending for older people. The empirical analysis yields that people are motivated by long-term self-interest and hold the state responsible to protect them from the perceived future risk of old-age poverty. Also, norms of reciprocity and of deservingness are important to support intergenerational redistribution, whereas the latter seems to be the relatively most important motivation. We can take this as a sign of intergenerational cohesion that is relevant against the background of accelerating demographic aging and resulting pressure on institutions of intergenerational redistribution.     

Doubled Homes — Doubled Social Ties? Children's Relationships in Post‐Divorce Shared Residence Arrangements

Although an increasing number of children live in shared residence arrangements after parental divorce, studies on their social relationships are rare. We address this research gap by relying on configurational approaches, social capital and social networks. Building on qualitative case studies (ego‐centred networks, interviews) with 14 children aged 10–14, results show that respondents constructed social ties based on two key categories: emotional closeness and constancy. Having two places of residence did not multiply close relations, and relations that entered the network after parental divorce (e.g. step kin) were particularly distant. Children's networks at both homes had limited interconnections.     

‘We have very different positions on some issues’: how child welfare workers in Norway and England bridge cultural differences when communicating with ethnic minority families

This article compares how child welfare workers in Norway and England experience and cope with communication problems resulting from cultural differences. This study is based on in-depth, semi-structured interviews with 53 front-line child welfare workers and draws on social theories that understand communication as a social act. We show cross-country variations in child welfare workers' perceptions of the communicative problems and coping mechanisms. In Norway, social workers think that minority parents' perceptions on children's needs and child-rearing and parents' lack of understanding of the child welfare system were challenging. Social workers in England perceive the physical abuse of minority children as problematic. They are also concerned about carers' fears of social workers forcing majority cultural values on minority families. While social workers in both countries spend more time with minority families, their approaches dealing with communication challenges correspond to their different problem perceptions. Social workers in Norway act as cultural instructors: they focus on the needs of the minority child and instruct parents about Norwegian values and the Norwegian welfare system. Social workers in England are cultural learners: they focus on practising in anti-oppressive ways, while protecting ethnic minority children from physical abuse. Both approaches avoid going into real communication about perceived problems and what a child might need. We also discuss the implications of these findings on social work practice.