Two-step values for games with two-level communication structure

TU games with two-level communication structure, in which a two-level communication structure relates fundamentally to the given coalition structure and consists of a communication graph on the collection of the a priori unions in the coalition structure, as well as a collection of communication graphs within each union, are considered. For such games we introduce two families of two-step values inspired by the two-step procedures staying behind the Owen value (Owen, in: Henn, Moeschlin (eds) Essays in mathematical economics and game theory, Springer, Berlin, pp 76–88, 1977) and the two-step Shapley value (Kamijo in Int Game Theory Rev 11:207–214, 2009) for games with coalition structure. Our approach is based on the unified treatment of several component efficient values for games with communication structure and it generates two-stage solution concepts that apply component efficient values for games with communication structure on both distribution levels. Comparable axiomatic characterizations are provided.     

Care giving and nursing, work conditions and Humanitude®

Increased lifespan in western societies causes the increase of hospitalization in the old age, notably for patient showing forms of dementia including Altzheimer disease. These patients relate poorly to care givers and nurses, and cases of maltreatment have repeatedly been reported. To prevent abuse and increase patient's quality of life, Gineste and Pelissier (2007) proposed a philosophy of care based on the Humanitude? concept. Acknowledging that being human is being vertical and related to other humans, the pillars of Humanitude? are gaze, touch, talk, and standing. These modes of relation are systematically developed in care giving techniques derived from the concept. After several studies in geriatric hospitals, to assess psychosocial and ergonomic aspects of work, we present an analysis of the gap between the logic of human care and the logic of hospital organization, impacting employees work conditions and psychological welfare. Care giving is not only a "one to one" relation with the patient but needs to be integrated in the whole organization. Psychologists and ergonomists should be instrumental in defining the project and the organization linking human care giving towards the patients and better work conditions for healthcare employees.     

Social responsibility and work conditions: building a reference label, Démarche T®

Corporate Social Responsibility (CSR) is now considered in large and global companies and the recent publication of the ISO 26000 standard clarifies the targets. Based on our consultancy's experience for fifteen years in ergonomics mainly in French small and medium enterprises, we developed a label to coax and value efforts of companies in dealing with health and safety at the work place as required by ISO 26000 paragraph 6.4. The formal approach of ISO describes what should be achieved but gives no cue on how actual conditions of work should be improved. The label, called Démarche T (ie Process W where W stands for work) aims the management of work conditions as a process, giving visibility and credit to companies for their continuous involvement in the matter. We describe the items and processes that are part of our assessment. We first conduct an ergonomic diagnosis including the analysis of records on health, physical and psychological well-being, observations at the workplace and interviews with the workers. This diagnosis is followed by recommendations. The fulfillment of these is assessed yearly. Items under assessment include: - ergonomics, health and safety in the companies statements and their impact in actual project management; - relations with workers through the committee for health and safety; - actual results on health, safety and work conditions. On a local level, we give the companies passing the label a competitive edge in recruiting better candidates motivated by good work conditions, and help them fulfill ISO 26000 requirements, an increasingly decisive advantage to benefit from public regional and European support. Our paper describes the diagnosis and follow-up process.     

Coalitional desirability and the equal division value

Theory and Decision - We introduce three natural collective variants of the well-known axiom of desirability (Maschler and Peleg in Pac J Math 18:289–328, 1966), which require that if the...     

Pathological Gamblers: Inpatients’ versus Outpatients’ Characteristics

Several researchers and clinicians have questioned the advantages and disadvantages of inpatient and outpatient treatment for people suffering from pathological gambling. This study compares the characteristics of pathological gamblers seeking inpatient and outpatient treatment. A total of 233 pathological gamblers (inpatients = 134, outpatients = 99) participated in the study. Results show that inpatients have more severe gambling problems than those receiving outpatient services. Similar results were obtained on most other related variables such as anxiety, depression, alcohol consumption, and comorbidity. These results are discussed in terms of the costs and benefits of these two treatment modalities.     

A professionalization framework to understand the structuring of work

The notion of professionalization is widely used both by managers and researchers. This use questions the traditional definition of profession. This paper reviews a book published in 1988 – The System of Professions – written by a sociologist, A. Abbott. Though this book had a strong impact in the field of the sociology of professions, it has remained unknown by many researchers in management science. His pragmatic approach to the concepts of profession and professionalization helps achieve better understanding of work structuring and as a consequence can be useful to address issues such as human resources management, organizational control or even the management of information systems.     

Improving prediction performance of stellar parameters using functional models

This paper investigates the problem of prediction of stellar parameters, based on the star's electromagnetic spectrum. The knowledge of these parameters permits to infer on the evolutionary state of the star. From a statistical point of view, the spectra of different stars can be represented as functional data. Therefore, a two-step procedure decomposing the spectra in a functional basis combined with a regression method of prediction is proposed. We also use a bootstrap methodology to build prediction intervals for the stellar parameters. A practical application is also provided to illustrate the numerical performance of our approach.     

Changing ruralities, changing landscapes: exploring social recomposition using a multi-scale approach

Changes in agricultural practices have led to declines in the farming population and significant changes within the landscape. Paradoxically, many rural areas are recording significant demographic growth. Given the extent of rural areas experiencing these changes, little attention has been devoted to the relationship between rural migration processes and landscape developments. Therefore, the various rural dynamics resulting from these phenomena merit closer investigation. Moreover, we should explore these complex processes at scales where they are most evident. Through the multi-scale research approach used in this study, these processes are investigated in their regional, local, and domestic contexts.As shown by regional typological outlines, the great diversity of the rural areas indicates an increasing dissociation between the agricultural and socio-demographic trajectories. From our local-scale study, changes in lot occupation revealed new residential settlement patterns induced by an influx of in-migrants. Specific landscape characteristics seem to be a determining force shaping these population flows. At the same time, these population movements have dissimilar influences on evolving landscape dynamics. With the exception of isolated agricultural abandonment trajectories, migrant relocation does not seem to affect specific local-scale land use development. However, it is significantly associated with individual domestic practices. These practices are indicative of the migrant's identity in the rural landscape; further, they suggest specific values for the landscape's qualitative dimensions. These emerging urban and non-farming interests in rural landscapes challenge planning policies to guide the landscape's evolution for the benefit of its “producers” and “consumers”.     

Axiomatization and implementation of a class of solidarity values for TU-games

A new class of values combining marginalistic and egalitarian principles is introduced for cooperative TU-games. It includes some modes of solidarity among the players by taking the collective contribution of some coalitions to the grand coalition into account. Relationships with other class of values such as the Egalitarian Shapley values and the Procedural values are discussed. We propose a strategic implementation of our class of values in subgame perfect Nash equilibrium. Two axiomatic characterizations are provided: one of the whole class of values, and one of each of its extreme points.     

Trinque problem: covering complete graphs by plane degree-bounded hypergraphs

Let \(K_n\) be a complete graph drawn on the plane with every vertex incident to the infinite face. For any integers i and d, we define the (i, d)-Trinque Number of \(K_n\), denoted by \({\mathcal {T}}^d_{i}(K_n)\), as the smallest integer k such that there is an edge-covering of \(K_n\) by k “plane” hypergraphs of degree at most d and size of edge bounded by i. We compute this number for graphs (that is \(i=2\)) and gives some bounds for general hypergraphs.