Partial Partial Likelihood

The maximum likelihood and maximum partial likelihood approaches to the proportional hazards model are unified. The purpose is to give a general approach to the analysis of the proportional hazards model, whether the baseline distribution is absolutely continuous, discrete, or a mixture. The advantage is that heavily tied data will be analyzed with a discrete time model, while data with no ties is analyzed with ordinary Cox regression. Data sets in between are treated by a compromise between the discrete time model and Efron's approach to tied data in survival analysis, and the transitions between modes are automatic. A simulation study is conducted comparing the proposed approach to standard methods of handling ties. A recent suggestion, that revives Breslow's approach to tied data, is finally discussed.     

The reproduction of gender: housework and attitudes towards gender equality in the home among Swedish boys and girls

The housework Swedish girls and boys age 10 to 18 do, and their attitudes towards gender equality in the home are studied. One aim is to see whether the work children do is gendered and if so, whether they follow their parents', often gendered, pattern in housework. A second aim is to see whether children's attitudes are influenced by their parents' attitudes and practices. When it comes to issues like these, Sweden is of special interest because in 1995, Sweden was appointed the most gender equal country in the world by the United Nations. The data used were the Swedish Child Level of Living Survey 2000 (see http://www.sofi.su.se/LNU2000/english.htm), a data set that includes extensive first-hand information from both children and their parents. The results indicate that girls and boys in two-parent families are more prone to engage in gender atypical work the more their parent of the same sex engages in this kind of work. The fact that girls still do more housework than boys in all families independent of, among other things, the parental division of housework and the mother's educational level indicates that housework to some extent signifies gender also to children. However, no clear relation is found between the parents' division of work and the child's attitude towards gender equality in the home. Neither is there any clear relation between the parents' attitude towards gender equality in the home and the children's attitude to the same topic.     

Building collaboration between school and parents: issues for school social workers and parents whose young children exhibit violent behaviour at school

This research explores the perceptions of 60 parents whose children, aged from three to nine, had been involved in bullying, as defined under the Safe Schools Act and the Code of Conduct. Some of these children had been suspended from school, while others were potential candidates for suspension. These parents were recruited from Ottawa's two French-language school boards to participate in qualitative interviews between June 2000 and June 2002. The aim of this research was to cast new light on the perceptions of parents and schools with regard to their relationships, and on the role of school social workers in maintaining and enhancing collaborative partnerships.

The desire of some parents to be involved in the decisions concerning remedial action taken to address their child's aggressive behaviour touched a raw nerve in some schools. Nonetheless, when schools and parents ultimately recognize the daily challenges that both parties face, and a shared plan of action develops therein, the path to effective collaboration becomes clear. Early intervention on the part of school social workers gives them an edge in their efforts as mediators. They seize every opportunity to initiate different collaborative approaches between schools and parents, so that the issue of bullying can be handled in a more respectful way for everyone.     

THE USE OF MODERATED REGRESSION IN JOB REDESIGN DECISIONS*

This paper describes the use of moderated regression in job redesign decisions. The procedures outlined are intended to augment the job redesign strategy described by Hackman and his colleagues. Different regression models based on a theory of job design are shown to lead to different job redesign decisions. Comparisons are also made between the moderated regression procedures and the more commonly used subgroups analysis.     

Targeted estimation of state occupation probabilities for the non-Markov illness-death model

We use semi-parametric efficiency theory to derive a class of estimators for the state occupation probabilities of the continuous-time irreversible illness-death model. We consider both the setting with and without additional baseline information available, where we impose no specific functional form on the intensity functions of the model. We show that any estimator in the class is asymptotically linear under suitable assumptions about the estimators of the intensity functions. In particular, the assumptions are weak enough to allow the use of data-adaptive methods, which is important for making the identifying assumption of coarsening at random plausible in realistic settings. We suggest a flexible method for estimating the transition intensity functions of the illness-death model based on penalized Poisson regression. We apply this method to estimate the nuisance parameters of an illness-death model in a simulation study and a real-world application.     

Longitudinal neural and behavioral trajectories of charity contributions across adolescence

This study examined the development of prosocial charity donations and neural activity in the ventral striatum when gaining rewards for self and for charity. Participants 10–22 years (95% European heritage) participated in three annual behavioral-fMRI waves (T1: n = 160, T2: n = 167, T3: n = 175). Behaviorally, donations to charity as measured with an economic Dictator Game increased with age. Perspective taking also increased with age. In contrast, self-gain and charity-gain enjoyment decreased with age. Ventral striatum activity was higher for rewards for self than for charity, but this difference decreased during adolescence. Latent growth curve models revealed that higher donations were associated with a smaller difference between ventral striatum activation for self and charity. These findings show longitudinal brain–donations associations in adolescence.     

The sound of liminality: MHD's afro trap,affective listening,and the (re)invention of Afropean identities in France

This article is an exploration of the world making capacities of afro trap. Through an extended case study of MHD's discography, I ask what can be learnt about the liminal experiences of postcolonial black citizens, or Afropean citizens, in France, by listening to popular music. I argue that through embracing, reinventing, and (re)producing familiar Afropean soundscapes, MHD claims and creates from his liminal subject position. Going against the assumption that Frenchness and blackness are always mutually exclusive and in tension, this music sonically proposes a way of being otherwise in France, stemming from this liminality. I see in what I call ‘the sound of liminality’ an instance of ‘queering ethnicity,’ one which channels the affective capacities of sound. I propose affective listening as a method that, incorporating autoethnography to consider critical listening positionality, facilitates a renewed attention to sound as an object of sociological inquiry.     

Measuring the Benefit of Offering Auxiliary Services: Do Bag‐Checkers Differ in Their Sensitivities to Airline Itinerary Attributes?

When firms evaluate their service system design choices, there is typically more uncertainty surrounding the value that a particular auxiliary service provides than there is on the cost of providing that service. To help inform this decision, we propose an approach where we compare the relative value of the segment of passengers who use an auxiliary service to the relative value of the segment that does not use it. We demonstrate this approach for a typical auxiliary service common to the airline industry. In 2008, most US airlines implemented checked baggage fee policies to decrease their costs by reducing the number of customer service agents needed in the check‐in and baggage handling processes. The success of this change has led to a current debate at many of these airlines on whether to make further staffing cuts in these areas, essentially making it even less attractive for passengers to check their baggage. Our proposed methodology helps answer whether passengers who continue to check bags in today's baggage‐fee era are more or less valuable than passengers who do not check bags. We explore this question empirically by examining, through a stated preference survey, if a history of checking or not checking bags can be used to segment passengers based on how their itinerary choices are influenced by common airline service attributes (on‐time performance, itinerary time, number of connections, airfare, and schedule delay). Contrary to the opinions of some top airline executives, we find that the passengers who continue to check bags at airlines that charge baggage fees are generally less sensitive to differences in three of these important service attributes and are less likely to switch airlines when a competing airline improves its offerings along these dimensions. Thus, airlines that charge for checked bags should consider improving the customer experience for their bag‐checking passengers, as they represent a potentially more valuable segment class to the airline.