Globale organisation — globale manager — globale Klasse?

The globalization of business corporations led to the thesis that a so-called global management class would emerge, both integrating transnational companies and facilitating a global business culture which is able to turn cultural diversity into a competitive advantage. Two questions stem from this thesis: First, how do talents and high potentials in transnational companies become global managers? Second, is global management to be understood as an integrating culture or as a selective one in the context of transnational corporations? The article explores these questions by contrasting the theory of global management with empirical findings from research concerning the strategies of international management assignment and the forming of expatriates’ “mental memberships“. It is shown that global management rests on a ‘thin’ Ethos of economic rationalities which give way to an exclusive “business monoculture” challenging cultural diversity taking place in everyday-life of transnational organizations.     

Subtle images of antigypsyism: An analysis of the visual perception of “Roma”

ABSTRACT

This paper analyses the powerful stereotypical media discourse that shapes and reproduces a certain racialised and prejudiced perception of people identified as “Roma” in Germany. Using a close analysis of a single picture – appearing as harmless at first glance – and through the reconstruction of its various interpretational contexts and semantics the paper identifies mechanisms used in stereotypical media coverage of “Roma”. This qualitative analysis draws on media analysis of antigypsyism as well as on research of photographic construction of the “gypsy” in order to analyse the contemporary visual regime of “Roma” in Germany. As it portrays “the Roma” as a fundamentally different and socially deviant group, this visual stereotyping is shown to be an integral element of the persistent antigypsyist ideology, deeply embedded in German society.     

Approximate tests for the equality of two cumulative incidence functions of a competing risk

In the context of a competing risks set-up, we discuss different inference procedures for testing equality of two cumulative incidence functions, where the data may be subject to independent right-censoring or left-truncation. To this end, we compare two-sample Kolmogorov–Smirnov- and Cramér–von Mises-type test statistics. Since, in general, their corresponding asymptotic limit distributions depend on unknown quantities, we utilize wild bootstrap resampling as well as approximation techniques to construct adequate test decisions. Here, the latter procedures are motivated from tests for heteroscedastic factorial designs but have not yet been proposed in the survival context. A simulation study shows the performance of all considered tests under various settings and finally a real data example about bloodstream infection during neutropenia is used to illustrate their application.     

Foster care and the earned income tax credit

Foster care is a source of significant costs to both governments and foster children. Policies that provide income support to households potentially reduce entry into foster care via reducing child maltreatment and improving child behavior. As part of the American Recovery and Reinvestment Act in 2009 (ARRA2009), the federal government expanded the earned income tax credit (EITC), which is an important income support program for low-income working households. Using state-level data, we investigate the impact of this EITC expansion on state-level foster care entry rates. Typically, states with state-level EITC match federal EITC spending at a specific rate, meaning that increases in federal EITC spending increase state-level spending as well. We find that expansion of EITC decreased foster care entry rates by 7.43% per year in states with a state-level EITC, relative to those without. In models that separately examine foster care entry rates by age of the child, we find that the ARRA2009 had different effects on foster care entry based on the child’s age. We find that ARRA2009 decreased foster care entry rates for children age 11–15 by nearly 12% in states with a state EITC and it decreased foster care entry rates for children age 16–20 by roughly 17% in states with a state EITC, relative to states without a state EITC.     

Mein(nach-wie-vor-schöner)Prof.de

Tobias Wolbring argues in his replica to our article Mein(schöner)Prof.de (issue 4/2009 of this journal) that the presented empirical analyses would be problematic in several respects. He claims our sample was selective, criticizes the lacking control of relevant confounding variables and our statistical model building. In this response we consider Wolbring’s criticism in detail. We believe we can prove that his points of criticism do not hold after a close investigation. In particular, we think our central substantial conclusions can be maintained.     

Health and Well–Being in the Young Old and Oldest Old

Most individuals experience a decline in health status during old age. Paradoxically, there are proposals that older adults nevertheless maintain a positive sense of well–being, an indicator of successful aging. Data from the Berlin Aging Study (BASE: Baltes & Mayer, 1999), a locally representative sample of men and women aged 70 to 100+ ( N = 516, M = 85 years), suggest that cumulative health–related chronic life strains set a constraint on the potential of oldest old individuals to experience the positive side of life. The young old in BASE reported significantly higher positive SWB than did the oldest old. Chronic illness and functional impairments (e.g., vision, hearing, mobility, strength) limit well–being especially in very old age.     

Matching estimators and optimal bandwidth choice

Optimal bandwidth choice for matching estimators and their finite sample properties are examined. An approximation to their MSE is derived, as a basis for a plug-in bandwidth selector. In small samples, this approximation is not very accurate, though. Alternatively, conventional cross-validation bandwidth selection is considered and performs rather well in simulation studies: Compared to standard pair-matching, kernel and ridge matching achieve reductions in MSE of about 25 to 40%. Local linear matching and weighting perform poorly. Furthermore, the scope for developing better bandwidth selectors seems to be limited for ridge matching, but non-negligible for kernel and local linear matching.     

Struktur und Entwicklung der Controllingforschung — Eine Zitations-und Kozitationsanalyse von Controllingbeiträgen in deutschsprachigen wissenschaftlichen Zeitschriften von 1970 bis 2003

Zusammenfassung  Controlling ist eine vergleichsweise junge Teildisziplin der Betriebswirtschaftslehre, die sich mittlerweile in Praxis und Wissenschaft etabliert hat. Das Wissen über seine Entwicklung ist in weiten Teilen noch unscharf und weitgehend durch „anecdotal evidence” bestimmt. Die Autoren verfolgen daher in ihrem Aufsatz das Ziel, einen Beitrag zum besseren Verst?ndnis der Strukturen und Entwicklung der deutschsprachigen Controllingforschung zu leisten. Hierfür analysieren sie die Zitations-und Kozitationsstrukturen in 643 Beitr?gen zu Controllingthemen, die im Zeitraum von 1970 bis 2003 in sechs führenden wissenschaftlichen Zeitschriften im deutschen Sprachraum ver?ffentlicht wurden. Diese Beitr?ge enthalten insgesamt 18.125 Quellen. Im Ergebnis der Analysen zeigt sich, dass das Zitierverhalten in der Controllingforschung im Vergleich zu anderen betriebswirtschaftlichen Teildisziplinen durch eine Reihe von Besonderheiten gepr?gt ist und dass sich die Strukturen der deutschsprachigen Controllingforschung über die Zeit stark ver?ndert haben.

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Structure and development of research on controlling — a citation analysis papers on controlling in German speaking journals from 1970 through 2003

Summary  Controlling is a relatively young discipline in the field of business administration, which has now established itself in practice as well as in theory. Our knowledge about its development is for the most part still diffuse and dominated by anecdotal evidence. In their paper, the authors pursue the goal of contributing to a better understanding of the structures and the development of the German-speaking research in controlling. For this purpose, they analyze the citations-and co-citations structures of 643 articles, focusing on controlling aspects published in six leading Germanic academic journals between 1970 and 2003. These papers comprise a total of 18,125 sources. The results of the analyses show that the attitude to cite in controlling research, compared to other disciplines in business administration, is characterized by a number of features. Furthermore, the structures of German controlling research have changed significantly over time.

     

Portfolio optimization: New capabilities and future methods

Summary  This paper addresses the problem of portfolio selection in finance. In many cases, currently available software to compute the efficient frontier runs into difficulty in problems with more than about 600 securities. To proceed beyond this size, it is often necessary to modify the problem in which case there is typically a loss of information. In this paper, we discuss a computer capability that can exactly compute mean-variance efficient frontiers of problems with up to 2,000 securities in very reasonable time (even if a problem’s covariance matrix is 100% dense). The paper also discusses an augmentation to the theory of portfolio selection that allows multiple objectives (such as dividends, liquidity, social responsibility, amount invested in R&D, and so forth) to be incorporated into the portfolio selection process. In such problems, the efficient set is no longer a “frontier,” but is now best described as a “surface” with the interesting property that it is composed of platelets (like on the back of a turtle). Moreover, the computer capability that can compute the exact efficient frontier of a mean-variance problem with up to 2,000 securities also has, after additional coding, the ability to compute exactly all platelets of the efficient surface of a tri-criterion portfolio problem with up to 400 securities.

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Zusammenfassung  In dieser Arbeit stellen wir einen leistungsf?higen Rechenalgorithmus vor, um den effizienten Rand (die nichtdominierten Alternativen) von Portfolio-Auswahlproblemen in der Finanzierung zu bestimmen. Wir bezeichnen den Berechnungsalgorithmus, der in Java programmiert ist, mit MPQ (multi-parametric quadratic programming). MPQ weist gegenüber bisherigen Berechnungsverfahren eine Reihe von Vorteilen auf: Es kann für umfangreiche Anwendungsf?lle genutzt werden, ist durch passable Rechenzeiten charakterisiert und kann die Menge effizienter Alternativen in einem Bruchteil bisher üblicher Rechenzeiten bestimmen.