Assessment of the Effectiveness of Radon Screening Programs in Reducing Lung Cancer Mortality

The present study was aimed at assessing the health consequences of the presence of radon in Quebec homes and the possible impact of various screening programs on lung cancer mortality. Lung cancer risk due to this radioactive gas was estimated according to the cancer risk model developed by the Sixth Committee on Biological Effects of Ionizing Radiations. Objective data on residential radon exposure, population mobility, and tobacco use in the study population were integrated into a Monte‐Carlo‐type model. Participation rates to radon screening programs were estimated from published data. According to the model used, approximately 10% of deaths due to lung cancer are attributable to residential radon exposure on a yearly basis in Quebec. In the long term, the promotion of a universal screening program would prevent less than one death/year on a province‐wide scale (0.8 case; IC 99%: –3.6 to 5.2 cases/year), for an overall reduction of 0.19% in radon‐related mortality. Reductions in mortality due to radon by (1) the implementation of a targeted screening program in the region with the highest concentrations, (2) the promotion of screening on a local basis with financial support, or (3) the realization of systematic investigations in primary and secondary schools would increase to 1%, 14%, and 16.4%, respectively, in the each of the populations targeted by these scenarios. Other than the battle against tobacco use, radon screening in public buildings thus currently appears as the most promising screening policy for reducing radon‐related lung cancer.     

Inference for general parametric functions in box‐Cox‐type transformation models

The authors propose a simple but general method of inference for a parametric function of the Box‐Cox‐type transformation model. Their approach is built upon the classical normal theory but takes parameter estimation into account. It quickly leads to test statistics and confidence intervals for a linear combination of scaled or unsealed regression coefficients, as well as for the survivor function and marginal effects on the median or other quantité functions of an original response. The authors show through simulations that the finite‐sample performance of their method is often superior to the delta method, and that their approach is robust to mild departures from normality of error distributions. They illustrate their approach with a numerical example.     

Dynamic Pricing to Minimize Maximum Regret

We consider a dynamic pricing problem that involves selling a given inventory of a single product over a short, two‐period selling season. There is insufficient time to replenish inventory during this season, hence sales are made entirely from inventory. The demand for the product is a stochastic, nonincreasing function of price. We assume interval uncertainty for demand, that is, knowledge of upper and lower bounds but not a probability distribution, with no correlation between the two periods. We minimize the maximum total regret over the two periods that results from the pricing decisions. We consider a dynamic model where the decision maker chooses the price for each period contingent on the remaining inventory at the beginning of the period, and a static model where the decision maker chooses the prices for both periods at the beginning of the first period. Both models can be solved by a polynomial time algorithm that solves systems of linear inequalities. Our computational study demonstrates that the prices generated by both our models are insensitive to errors in estimating the demand intervals. Our dynamic model outperforms our static model and two classical approaches that do not use demand probability distributions, when evaluated by maximum regret, average relative regret, variability, and risk measures. Further, our dynamic model generates a total expected revenue which closely approximates that of a maximum expected revenue approach which requires demand probability distributions.     

Helping parents to manage infant crying and sleeping: a review of the evidence and its implications for services

Infant crying and night waking are common concerns for parents, costly problems for health services and may trigger infant abuse or lead to serious child disturbances. Parents are given contradictory advice on how to manage infant crying and sleeping, indicating the need for evidence‐based guidance. This review of recent research draws distinctions between infant crying and sleeping problems, between the problem identified by parents and the infant behaviour underlying the problem, between different types of crying behaviour and their causes, and between the types of cases which present at different ages. It proposes that the two main approaches to parenting advocated by baby‐care experts, ‘infant‐demand’ and ‘structured’ parenting, have different benefits, and costs. Comparative studies have found that infant‐demand parenting is associated with low amounts of fussing and crying in the first three months of age, but with night waking which continues beyond three months. Randomised controlled trials have provided evidence that structured parenting leads to more overall fussing and crying during the first three months, but reduced night waking and crying after that. The findings are translated into recommendations for preventing and treating infant crying and sleeping problems, for policy debate, and for further research. Copyright © 2007 John Wiley & Sons, Ltd.     

Unravelling Learning within Multinational Corporations*

This article explores the impact of institutional variation on the extent to which subsidiary firms learn from multinational corporations. Learning is conceptualized here as consisting of two aspects: knowledge flow and reinforcement of or change in routines to incorporate the behaviourist assumptions of learning into the international business field. The research is based on in‐depth case studies that systematically compare the ways in which parent company knowledge diffuses to Polish, Turkish, Italian and German subsidiary firms in the chemical industry. The findings show that even though firms face the same global pressure to integrate and pursue the same international strategy, their learning outcomes are not the same. There is heterogeneous learning as a result of differences in the institutional context of home countries. Where institutional structures are not favourable to learning, the proactive or reactive orientation of actors to identifying future needs and modifying existing schemata – which highlight the importance of human agency – is significant in explaining learning.     

Adaptive Strategies,Gender Ideology,and Work‐Family Balance Among Dutch Dual Earners

Using questionnaire data on 149 Dutch dual‐earner couples with young children participating in the European Famwork study, we examine how adaptive strategies and gender ideology relate to parents’ perceived success in balancing work and family. Path analysis indicates that some adaptive strategies may harm individuals’ work‐family balance, particularly when they are made in the domain where the time budget is limited. In the need to succeed in multiple roles, however, endorsement of traits traditionally linked with the opposite gender, that is masculine traits for women and feminine traits for men, seems beneficial. We speculate that two underlying mechanisms — social pressure and time constraints — jointly operate in determining perceived success in balancing work and family.     

“Children's Talk and Parental Fear”. Cases of Sexual Misconduct in Danish State Schools 1900–19701

Cases of sexual misconduct in Danish state schools became the objects of attention in the years following the turn of the 20^th Century. An analysis of 85 cases where teachers were accused of sexual misconduct towards their students reveals that the period from 1900 to 1970 present a set of changes in the attitudes to and management of intergenerational sexuality. Throughout these years there existed three ambivalent features relating to the child and its sexuality, to the pros and cons of reporting the case, and to the behaviour of the masculine teacher at a time of changing pedagogical ideals.     

Politics,Plurality and Problemsheds: A Strategic Approach for Reform of Agricultural Water Resources Management

Starting from the assessment that past efforts at reform in agricultural water management in developing countries have achieved very little, this article argues that a fundamental change is required in the approach to policy and institutional transformation if the present deadlock in the internalisation of ecological sustainability, human development/poverty alleviation and democratic governance into the ‘core business’ of water bureaucracies is to be overcome. ‘Social engineering’ approaches need to be replaced by ‘strategic action’ approaches that acknowledge the inherently political character and the plurality of actors, institutions and objectives of water management — a perspective operationalised here around the notions of ‘problemshed’ and ‘issue network’.     

Risk Factors of Sexual Harassment by Peers: A Longitudinal Investigation of African American and European American Adolescents

The present research explores risk factors for, and longitudinal associations of, sexual harassment by peers during adolescence. Eight‐hundred and seventy‐two African American and European American adolescents (65.4% African American, 51.1% females) were assessed during the summer after the eighth grade (mean age=14.2 years) and then again in the 11th grade (mean age=17.1 years). At the first assessment, adolescents were asked about their experiences with sexual harassment, their psychological reactions to sexual harassment, and also about their peer relationships, perceived pubertal timing, problem behavior, and mental health. At the second assessment, adolescents reported on their problem behavior and mental health. In general, youth who associated with peers who were involved in problem behavior were at risk for victimization. Among females, those who perceived themselves to be experiencing early pubertal development were also at risk. Additionally, for some adolescents, sexual harassment predicted later adjustment difficulties.