Strong laws of large numbers for dependent heterogeneous processes: a synthesis of recent and new results

This paper surveys recent developments in the strong law of large numbers for dependent heterogeneous processes. We prove a generalised version of a recent strong law for Lz-mixingales, and also a new strong law for Lpmixingales. These results greatly relax the dependence and heterogeneity conditions relative to those currently cited, and introduce explicit trade-offs between dependence and heterogeneity. The results are applied to proving strong laws for near-epoch dependent functions of mixing processes. We contrast several methods for obtaining these results, including mapping directly to the mixingale properties, and applying a truncation argument.     

Betterment and trust in a rural Ciskei village∗

During the 1960's government‐financed agricultural betterment schemes were introduced into several rural villages in the Keiskammahoek magisterial district of the Ciskei, ‘a self‐governing homeland in South Africa'’ (Quail, 1980).

The first part of this paper traces the planning and implementation of betterment in Cata village. Seen in terms of its own goal of creating a ‘stable rural peasantry’ the betterment scheme has not succeeded. However, the success of a betterment scheme should not be seen only in terms of material and socialbenefits, but also in terms of its ability to persuade the villagers of the desirability and value of betterment as such, to change attitudes. Here the scheme has scored only very limited success. The second part of the paper looks at the villagers‘¹ perceptions of the desirability and value of betterment as it was brought to them and considers the differences between their attitudes and those of officialdom.     

Exposure to Traffic and Risk of Hospitalization Due to Injuries

Research on the risk of motor vehicle injuries and their relationship with the amount of travel has been only partially analyzed. The few individual exposure assessments are related to very specific subsets of the driving and traveling populations. This study analyzes the relationship between kilometers traveled and hospitalization due to motor vehicle injuries. Twelve thousand three hundred and sixty nine Spanish university graduates from the Seguimiento Universidad de Navarra multipurpose cohort study were evaluated. They had not been hospitalized due to motor vehicle injuries at baseline and were followed up to eight years. Biannual questionnaires allowed for self‐reporting of kilometers traveled in motor vehicles, together with incidence of hospitalization. Covariates in the Cox regression models included age and gender and baseline use of safety belt while driving, driving a vehicle with driver‐side airbag, driving a motorcycle, and drinking and driving. There were 49,766 participant‐years with an average yearly travel of 7,828 km per person‐year. Thirty‐six subjects reported a first hospitalization event during this time. The adjusted hazard ratio per additional kilometer traveled was 1.00005 (95% confidence interval 1.000013 to 1.000086). Even the smallest of reductions in the amount of kilometers traveled (from an average of 3,250 km per year to 1,000) has a statistically significant protective effect on the likelihood of sustaining hospitalization due to motor vehicle injury (aHR 0.9, 95% CI 0.78 to 0.98). In light of current policies aimed to reduce motorized traffic due to environmental concerns, it may be appropriate to consider the additional health benefit related to reductions in injuries.     

Skill and education effects on earnings in 18 Countries: The role of national educational institutions

This study investigates whether the mechanisms why education is rewarded vary across countries. Do educational institutions affect the likelihood that support for a particular mechanism is found? Combining IALS survey data and OECD statistics on educational institutions, it was shown that the effect of measured skill on earnings - controlled for educational attainment - is lower in countries where educational institutions produce skills relevant for work through the vocational system. This indicates that the human capital perspective on education works particularly well in vocationally oriented educational systems, as the skills generated in education are strongly overlapping with the skills that are rewarded. An alternative mechanism sees education as a means for social closure through credentialization. Under the credentialization model, education is not primarily rewarded for the productivity-enhancing skills it entails, but rather for reasons unrelated to productivity. Following this theory education is used for selection into the organization, after which directly observable skills are determining wages. Assuming that a strongly differentiated educational system creates boundaries between social groups, it is hypothesized that strongly differentiated systems lead to stronger measured skill effects. We do not find support for this hypothesis.     

Charisma,Macht und Narzissmus

Charisma, power and narcissism. On the diagnostics of an ambivalent leading qualityManagers are often obviously narcissistic personalities with “charismatic qualities”. The author discusses the background of these qualities and their ambivalence, because behind the brilliance of a successful manager may be a hidden narcissistic problem as the actual motive power. Nevertheless a constructive narcissism is to be distinguished from a destructive one. Charismatic constellations as well as narcissistic dynamics are to be understood not only as an individual problem but as an interactional phenomenon, involving both sides of a relationship. In order to explain these dynamics, the author presents the concepts of “narcissistic collusion” and “expanded self”. It is of great importance to the coach, to be able to analyse and to deal with these relational patterns — and also to preserve oneself from being involved in such narcissistic dynamics.     

Coaching von Unternehmern Erfahrungen und Wirkungen

Coaching of owner-entrepreneurs — experiences and effectsThe author argues that the kind of coaching which owner-entrepreneurs require differs in fundamental ways from the kind of coaching for hired top managers. The difference is rooted in the higher level of complexity of the decision problems of owner-entrepreneurs, which needs to be reflected in a more complex approach chosen by the coach. In this context, the ability to make himself better understood by others turns out to be a very essential key capacity which some owner-entrepreneurs lack and which a qualified coach can help them to regain.     

Philosophie als Einübung des Perspektivenwechsels am Beispiel von Platon und Nietzsche

Philosophy as exercising the shift of perspectives, exemplified with Plato and NietzscheIn professional counselling a shift of perspectives is useful to develop new options of thinking and of action in the case of seemingly hopeless situations. Philosophy presents a great variety of concepts and also of models of change processes, which may offer a resource to counsellors. With regard to Plato’s “cave metaphor” and to Nietzsche’s “transvaluation of all values” the author presents a structure of change in three stages. Concerning the practice of counsellors some relevant aspects are derived from these discussions.     

Erfolgsfaktoren beim Einzel-Coaching

Success factors of executive coaching. A screening of the coaching scenery from the client’s point of viewThis survey, based on questionnaires, examines the success factors of one-to-one coaching from the client point of view. Firstly, ten success factors in coaching were established by means of factor analysis. Secondly, more extensive analysis shows that, contrary to previous research in this field, the “professional system” is not necessarily a determining success factor in coaching. As an exclusive instrument of staff development, coaching seems to be effective even without support from the professional system. The analysis also indicates that the clients perceive their coach as an advisor and confidant as regards role expectations. Furthermore, multiple regression analysis discloses the predictive effects of the two success factors “the coach’s qualification” and “the coach’s involvement” for the overall success of coaching from the client’s point of view. The overall success of coaching itself is established through three items: the clients’ attitudes towards coaching, their attitude concerning further coaching, and the extent to which their objectives were met in coaching.