Dualismus oder Reduktion – Eine Antwort auf Gregor Bongaerts

Gregor Bongaerts (2016b) has objected to my criticism of arguments in favor of a non-reductive sociology (both articles in this journal) and my proposal of a reductive individualism more generally. This contribution defends reductive individualism as a viable program in social theory. Bongaerts’s main objection, that I do not distinguish sufficiently between creation (Urheberschaft) and causation (Verursachung), can only be understood as an objection if one conceives the social sense of an action as an irreducible collective concept. Although this possibility cannot be excluded a priori, it poses a number of fundamental challenges. Firstly, it has to be asked whether or not this position can be connected with a realization proviso (that everything social is ultimately realized by individuals). Secondly, the attribution argument used by Bongaerts is either no objection to individualism, or it is threatened by a logical regress, since it is not plausible that subsequent interpretations of an action can produce the subjective meaning related to action. Finally, the question arises whether a collectivist argument does not require a collective bearer of meaning-attribution, the existence of which can hardly be asserted within the framework of a practice theory inspired by Bourdieu. The essay ends with some questions, especially with regard to the multi-dimensionality and unity of Bongaerts’s concept of meaning (Sinn).     

BOOK REVIEW

Hurricane Katrina ranks among the worst natural catastrophes in United States history. In addition to the physical damage to the city and the levees, Katrina will also be remembered for the posthurricane suffering, the lack of coordinated government response, and memorable reporting in the media. The media, here characterized as newspaper coverage, utilized anarchy to frame the reported postdisaster lack of government presence, the perceived threat of, and actual violence and looting in the immediate wake of the catastrophe. Ethnographic content analysis of 59 newspaper articles yielded a typology of the three different connotations of anarchy. Finally, a comparison is offered between the media's use of anarchy in the post-Katrina coverage and the sociopolitical theory of anarchy. The article concludes that although the media mischaracterized the postdisaster reality by using an anarchy frame, their coverage is consistent with the disaster mythology literature, while conflating typical disaster myths within the anarchy frame.     

Smooth backfitting in practice

Summary.  Compared with the classical backfitting of Buja, Hastie and Tibshirani, the smooth backfitting estimator (SBE) of Mammen, Linton and Nielsen not only provides complete asymptotic theory under weaker conditions but is also more efficient, robust and easier to calculate. However, the original paper describing the SBE method is complex and the practical as well as the theoretical advantages of the method have still neither been recognized nor accepted by the statistical community. We focus on a clear presentation of the idea, the main theoretical results and practical aspects like implementation and simplification of the algorithm. We introduce a feasible cross-validation procedure and apply it to the problem of data-driven bandwidth choice for the SBE. By simulations it is shown that the SBE and our cross-validation work very well indeed. In particular, the SBE is less affected by sparseness of data in high dimensional regression problems or strongly correlated designs. The SBE has reasonable performance even in 100-dimensional additive regression problems.     

Exponential Family Techniques for the Lognormal Left Tail

Let X be lognormal(μ,σ²) with density f(x); let θ > 0 and define . We study properties of the exponentially tilted density (Esscher transform) f_θ(x) = e^?θxf(x)/L(θ), in particular its moments, its asymptotic form as θ→∞ and asymptotics for the saddlepoint θ(x) determined by . The asymptotic formulas involve the Lambert W function. The established relations are used to provide two different numerical methods for evaluating the left tail probability of the sum of lognormals S_n=X₁+?+X_n: a saddlepoint approximation and an exponential tilting importance sampling estimator. For the latter, we demonstrate logarithmic efficiency. Numerical examples for the cdf F_n(x) and the pdf f_n(x) of S_n are given in a range of values of σ²,n and x motivated by portfolio value‐at‐risk calculations.     

Privacy revisited? Old ideals, new realities, and their impact on biobank regimes

Biobanks, collecting human specimen, medical records, and lifestyle-related data, face the challenge of having contradictory missions: on the one hand serving the collective welfare through easy access for medical research, on the other hand adhering to restrictive privacy expectations of people in order to maintain their willingness to participate in such research. In this article, ethical frameworks stressing the societal value of low-privacy expectations in order to secure biomedical research are discussed. It will turn out that neither utilitarian nor communitarian or classical libertarian ethics frameworks will help to serve both goals. Instead, John Rawls’ differentiation of the “right” and the “good” is presented in order to illustrate the possibility of “serving two masters”: individual interests of privacy, and societal interests of scientific progress and intergenerational justice. In order to illustrate this counterbalancing concept with an example, the five-pillar concept of the German Ethics Council will be briefly discussed.     

The relative impact of complementary leader behaviors: Which matter most?

Despite conceptual overlap between the transformational–transactional model of leadership and the Ohio State two-factor model (i.e., Consideration and Initiating Structure), no systematic research examines correspondence among these behaviors or estimates their relative validities across a common set of outcomes. The current studies a) examine the factor structure of five key dimensions of these two models (transformational, contingent reward, laissez faire, Initiating Structure, and Consideration) and b) estimate relative validities with respect to two organizational outcomes: employee job satisfaction and perceptions of leadership effectiveness. Although results of a meta-analysis show that transformational leadership is significantly related to both Consideration (ρ = .74) and Initiating Structure (ρ = .50), results of two primary studies provide support for the independence of these leadership dimensions. Moreover, dominance analyses (Budescu, 1993) reveal that Consideration and transformational leadership are the most important predictors of employee job satisfaction and ratings of leadership effectiveness, and each had incremental validity when controlling for the effects of the other. Overall, results suggest that dimensions from both models are important predictors of employee outcomes.     

Verwertungserlöse von Kreditsicherheiten: Eine empirische Analyse notleidender Unternehmenskredite

Prediction models of recovery rates gain in importance because of the Basel II-framework, the impact on credit risk management, and the calculation of loan rates. Although the importance of the quota of collateral is beyond dispute in academic literature, only few studies exist analyze the real payments when the collateral is realized. This is the main focus of this paper. It can be shown that the net payments of the realized collateral are on average considerably below the predicted values. A large period between the time of default of the borrower and the begin of the realization leads to smaller ratios, calculated as the net payments divided by the predicted values, whereas the intensity of the client relationship and the macroeconomic conditions have only a marginal influence. The ratio differs significantly when analyzing different kinds of collateral. Furthermore, it is higher for small companies. It cannot be found any influence of the “Insolvenzrechtsreform” in 1999 in Germany.     

Die Selektionsentscheidung bei postalisch zugestellter Direktkommunikation. Eine feldexperimentelle ��berpr��fung des Einflusses aktivierungsstarker Reize am Beispiel der Kundenzeitschrift

The findings of activation theory provide evidence that highly-activating stimuli in above-the-line advertising increase consumers?? perception. In practice and theory these findings are also being transferred to postal direct marketing instruments, although hardly any empirical consolidated findings exist to substantiate this assumption. The absent empirical support and the reasonable presumption that the perception of postal direct marketing instruments and above-the-line advertising instruments differs are decisive reasons to examine if this transfer is justified. Based on the results to this question implications for designing postal direct marketing instruments will be offered. A field-experiment with 960 test persons was conducted and four, in terms of the activation level, manipulated versions of a customer magazine were employed. The empirical findings support the hypothesis that the activation level has no influence on the selection decision concerning postal direct marketing instruments.     

Eine neue Methode zur Untersuchung von Mikroprozessen in Lerndyaden: Eine Videostudie unter Berücksichtigung von kognitiven Grundfähigkeiten und Zielorientierungen

The study at present uses a new video method with individual audio tracks to investigate micro processes within learning in a simulation based learning setting. Visible and listenable behaviour was coded with regard to peer tutoring and problem solving. The frequencies and durations of these categories were summarized and used as dependent variables in regression models with cognitive abilities and goal orientations as predictors. Results showed that variation in the dyadic interactional behaviour was systematically related to these properties of the partners. For example, while overt problem solving behaviour is related to goal orientations there was no such effect for the cognitive abilities. Implications for the composition of dyadic learning groups and for further video study arrangements applying the new method will be discussed.