A method for checking regression models in survival analysis based on the risk score

We propose to perform model check for the Cox and Aalen regression models using martingale residual processes grouped after the risk score. Asymptotic distributions of the grouped martingale residual processes are deduced, so both formal and graphical model check can be performed. The method is validated by stochastic simulation. A data example with patients with primary biliary cirrhosis of the liver is discussed.     

Mitteilung

Ohne Zusammenfassung     

Classification Error of the Thresholded Independence Rule

We consider classification in the situation of two groups with normally distributed data in the ‘large p small n’ framework. To counterbalance the high number of variables, we consider the thresholded independence rule. An upper bound on the classification error is established that is taylored to a mean value of interest in biological applications.     

Closing the market as the only protection? Trade unions and the labor market in the French performing arts industry from 1919 to 1937

The case of trade unions in the French performing arts industry between the two World Wars will serve here to test the hypothesis advanced in the Sociology of Professions and Theory of closed Labor Market whereby workers seek to improve their chances by attempting to limit its access. In line with that hypothesis, lyrical and dramatic actors tried to control the market, in particular by making it compulsory to hold a professional license. Contrary to what the theory proclaims, however, musicians’ trade unions sought to control wages and employment by implementing a strategy of maximum receptivity, i.e. by accepting anyone who entered the market. The article shows how those different strategies molded group identities, by tracing the borders of legitimacy and influencing the nature and extent of solidarities that cropped up in the milieu. Beyond the divergent strategies, two contrasting prospects of emancipation emerge from this study: emancipation as professionals for an elitist and exclusive group of actors and opera singers, emancipation as wage-earners for an inclusive, non-elitist group of musicians.     

Die Netzwerkperspektive in der Gesundheitsförderung als Ansatz für professionelles Handeln

Network perspective and health promotion have in common, the orientation on resources and changing from the pathogenic, deficit oriented viewpoint towards a salutogenic one, a perspective based on protective and supporting factors. On principle this means an expanded and integrating orientation which goes beyond the individual by considering the personal circumstances and environmental conditions. The integration of network perspective in counseling processes needs a professional attitude, grounded in a basic understanding of networks as functional and health-promoting in the sense of social support but also as a systemic view considering transactional relations between individual and environment. Here processes of empowerment play a central part. The expansion of opportunities for professional action in the sense of a salutogenic basic attitude refers to foundation and action guiding principles of health promotion.