Effects of Race and Sex on Work Group Cooperation Vs. Competition

This study examines whether differences in individualism-collectivism by race and sex result in differences in cooperation vs. competition. Expanding upon the earlier work of Cox et al., individual and group-level comparisons are made by race and sex. Exclusively examining race-based effects, Cox et al. had suggested that blacks display greater cooperation than do whites. Our findings concur; however, we are able to demonstrate this using a more complete group-level comparison. Given literature suggesting sex to be as relevant as race when administering work force diversity, we further expanded upon the earlier study by testing for such effects. While some previous research has suggested a tendency for women to behave more cooperatively than do men, our findings show that this is not necessarily the case. Specifically, this study demonstrates that sex decreases in importance, when controlling for race. Applications and suggestions for future research are presented.     

Post-Separation Conflict Trajectories: A Longitudinal Study

Although previous studies have shown that parental separation and parental conflict contribute independently to the adaptation difficulties of young people, there is, as of yet, no precise portrait of how post-separation conflicts evolve. Indeed, some fundamental questions remain unanswered: (1) Do parents who experience few conflicts during their break-up continue to enjoy a harmonious relationship afterward? (2) When parents have a conflictual relationship in the first years after separating, do problems eventually subside? (3) Are a family's characteristics associated with the way a post-separation conflict evolves? The present, exploratory study attempts to provide some answers to these three questions. The sample was composed of 123 boys and girls from 8 to 11 years old. The children and their parents were interviewed on two separate occasions at a 1-year interval. The first interview (time 1) took place 2.5 years after the separation on average. The children were notably asked to give their perception of the parental conflict. Four post-separation conflict trajectories were brought to light. Analysis also targeted three more-specific variables that distinguished these conflict trajectories, namely family income, quality of the relationship with the mother, and the degree of agreement at the time of separation.     

La validation des acquis de l’expérience est-elle un moyen de reconnaissance du travail ?

Based on a survey conducted in 15 firms, associations or occupations where work-based experiences were being validated under the terms of a law that entered the French Labor Code in 2002, questions are raised about this process and its capacity for obtaining more recognition for the work done by wage-earners. After identifying four distinct employer rationales for implementing validation, the channels favoring the obtainment of such recognition are examined when this procedure is actually applied inside firms. Putting one's job into words is a powerful means for making it visible; and the opportunity to face colleagues is an occasion for reinforcing an occupational identity. Nonetheless, validation has little effect on pay, and what is being validated is often ambiguous. Employers’ and wage-earners’ contrasting views reveal how difficult it is to obtain recognition of the work performed. This process has opened the way to changing this in the framework of procedures negotiated, in particular, with labor unions.     

Validation of a longitudinally measured surrogate marker for a time-to-event endpoint

The objective of this paper is to extend the surrogate endpoint validation methodology proposed by Buyse et al. (2000) to the case of a longitudinally measured surrogate marker when the endpoint of interest is time to some key clinical event. A joint model for longitudinal and event time data is required. To this end, the model formulation of Henderson et al. (2000) is adopted. The methodology is applied to a set of two randomized clinical trials in advanced prostate cancer to evaluate the usefulness of prostate-specific antigen (PSA) level as a surrogate for survival.     

Quality certification, regulation and power in fair trade

This article examines governance changes and shifting power relations within the fair-labelling network. These shifts are framed analytically by reference to broader changes in the agrofoods sector tied to the increasingly key role played by quality relations and standards in the production and marketing of food. The author argues that evident trends such as a growing complexity of fair-labelling markets, the centralization of its regulating bodies, and the normalization of certification processes have altered power relations to the detriment of small producers. In addition, and at the same time, this ‘fair’ market niche has become more desirable to dominant market actors leading to a combination of factors that has triggered a broad debate within fair trade with respect to the definition and mission of the fair-trade network.     

The Quest for Aid Complementarity: Reforming Co‐operation between Nordic+ Donors and NGOs

Aid fragmentation is a maddening problem in the aid business. NGOs are part and parcel of this fragmentation problem; hence calls for more complementarity between Northern NGOs and (their) governments have led to a series of co‐funding reforms. This article analyses the co‐funding reforms of the Nordic+ donors and situates them within the broader evolutions that have taken place in donor‐NGO relations in these countries. It finds that these donors have interpreted complementarity in very different and even contradictory ways. Where some require NGOs to develop activities within the confines of the official bilateral strategy (intensive complementarity), others allow NGOs to do very different things (extensive complementarity).     

The impact of serial transitions on behavioral and psychological problems among children in child protection services

This study focuses on the impacts of serial transitions on externalized and internalized behavior disorders, anxiety, and depression among children in child protection services. The research was carried out with a sample of 741 children. The findings demonstrate that the number of times a family is blended is a stronger predictive factor for children's adjustment than is the family structure at the time of the interview. In predicting externalized and internalized behavior problems among children, however, the effect of family structure disappears in favor of the variables associated with family functioning and family climate.     

Minimum d-blockers and d-transversals in graphs

We consider a set V of elements and an optimization problem on V: the search for a maximum (or minimum) cardinality subset of V verifying a given property ℘. A d-transversal is a subset of V which intersects any optimum solution in at least d elements while a d-blocker is a subset of V whose removal deteriorates the value of an optimum solution by at least d. We present some general characteristics of these problems, we review some situations which have been studied (matchings, s–t paths and s–t cuts in graphs) and we study d-transversals and d-blockers of stable sets or vertex covers in bipartite and in split graphs.     

Validation of surrogate end points in multiple randomized clinical trials with failure time end points

Before a surrogate end point can replace a final (true) end point in the evaluation of an experimental treatment, it must be formally 'validated'. The validation will typically require large numbers of observations. It is therefore useful to consider situations in which data are available from several randomized experiments. For two normally distributed end points Buyse and co-workers suggested a new definition of validity in terms of the quality of both trial level and individual level associations between the surrogate and true end points. This paper extends this approach to the important case of two failure time end points, using bivariate survival modelling. The method is illustrated by using two actual sets of data from cancer clinical trials.