Aktuelle Publikationen

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  • Widened Learning of Portfolio Selection for Index Tracking

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    This master’s thesis considers index tracking from the perspective of solution space exploration. Several search space heuristics are used in combination with different portfolio optimization models in order to select a tracking portfolio with returns that mimic a benchmark index. Even with the fastest hardware and the most massively parallel systems available today, it is infeasible to conduct an exhaustive search for the large solution space in a reasonable time. Instead of increasing the number of parallel resources with the aim to traverse as much solution space as possible, we try to obtain the best use of every parallel resource. With this aim we introduce several portfolio diversity measures. Experimental results conducted on real-world datasets show that adding diversity to the set of parallel search paths can provide a better solution (tracking portfolio) due to exploration of disparate solution space regions. However, the choice of the diversity measure plays an important role. Poor path diversification can hinder the progress towards a better solution.

  • Kärner, Tobias; Bonnes, Caroline; Schölzel, Christian (2018): Konstruktives Feedback und nachvollziehbare Leistungserwartungen? : Analysen zur wahrgenommenen Bewertungstransparenz im Referendariat Bildung und Beruf : Zeitschrift des Bundesverbandes der Lehrkräfte für Berufsbildung e.V.. 2018, 1(8), pp. 108-114. ISSN 2511-1353

    Konstruktives Feedback und nachvollziehbare Leistungserwartungen? : Analysen zur wahrgenommenen Bewertungstransparenz im Referendariat

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    dc.contributor.author: Schölzel, Christian

  • Interkulturelle Sensibilität und Persönlichkeitsmerkmale : eine empirische Untersuchung zu Auslandsaufenthalten von Auszubildenden

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  • Wißhak, Susanne; Hochholdinger, Sabine (2018): Trainers' knowledge and skills from the perspective of trainers, trainees and human resource development practitioners International Journal of Training Research. 2018, 16(3), pp. 218-231. ISSN 1448-0220. Available under: doi: 10.1080/14480220.2018.1576327

    Trainers' knowledge and skills from the perspective of trainers, trainees and human resource development practitioners

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    This study focused on trainers’ professional knowledge and skills. Forty-one aspects of trainer knowledge were identified from the empirical research literature and presented in an online questionnaire to 200 trainers, 253 trainees and 93 human resource development practitioners. The respondents rated the importance of each knowledge aspect for the professional activities of a trainer on a six-point Likert scale. The results indicate that subject-matter knowledge and communication techniques are considered vital for trainers, along with content-specific instructional knowledge such as specific training methods. Additionally, trainers are expected to provide clarity and structure, build relationships with trainees and create a constructive learning environment. Implications for future research and training practice are discussed.

  • Atik, Didem; Findeisen, Stefanie; Nickolaus, Reinhold; Seifried, Jürgen (2018): Ursachen von Ausbildungsabbrüchen : Stand der Forschung Berufsbildung : Zeitschrift für Theorie, Praxis, Dialog. Eusl-Verlagsgesellschaft. 2018, 72(172), pp. 12-14. ISSN 0005-9536. eISSN 2199-1944

    Ursachen von Ausbildungsabbrüchen : Stand der Forschung

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    dc.contributor.author: Atik, Didem; Nickolaus, Reinhold

  • Three Essays on Gender Inequality in Education and Income

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  • Kind, Axel (2018): National and International Banking Heterogeneity Zeitschrift für vergleichende Rechtswissenschaft. 2018, 117(4), pp. 440-455. ISSN 0044-3638

    National and International Banking Heterogeneity

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    The costs of the Global Financial Crisis in terms of lost GDP growth have been higher in Europe than in the US. This is likely due to the outbreak of the European Sovereign Debt Crisis. To countervail its negative effects, the EU has made considerable efforts to initiate the European Banking Union with its ideal of a level playing field among credit institutions. In spite of these harmonization efforts, the level of heterogeneity of banks across member states in terms of their average performance, capital adequacy, and asset quality remains high. Banks in the Southern and Eastern European periphery are found to be less profitable and riskier than their counterparts in other regions of the EU. Given that such differences can be traced back, at least partially, to country-specific factors – economic, legal, and institutional conditions – applying the same prudential rules to all EU banks may fail to comply with the level-playing-field paradigm and actually distort the competition among European banks. The European banking sector is characterized by a rich variety of governance.

  • Three Essays on Socio-economic Transitions : The Case of East and West Germany

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  • Prices, Public Goods and Politics : Three Essays in Public Economics

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  • Barth, Dorothee; Hochholdinger, Sabine (2018): Wie unterstützen Lehrende den Trainingstransfer in Führungstrainings? : Eine qualitative Interviewstudie Bildungsforschung. 2018, 2018(1). eISSN 1860-8213. Available under: doi: 10.25539/bildungsforschun.v0i1.236

    Wie unterstützen Lehrende den Trainingstransfer in Führungstrainings? : Eine qualitative Interviewstudie

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    Wenig ist bekannt über das Vorgehen von Weiterbildenden bezüglich des Teilnehmertransfers. 15 leitfadengestützte Interviews wurden mit Führungskräftetrainer/innen durchgeführt und inhaltsanalytisch ausgewertet. Im Ergebnis verfügen die Befragten über ein breites, größtenteils mit der Forschungslage korrespondierendes Handlungsrepertoire und Wissen: Transfer wird als kontinuierlich verstanden und entsprechend gestützt, spezifische Lehrendenmerkmale werden als transferwirksam benannt. Zusätzlich beinhalten die Daten neue, plausibel erscheinende Transferaktivitäten.

  • Auditor Incentives and the Structure of the Audit Market : A Basic Model for Investigating Simultaneous Effects of Audit Market Regulations

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    For decades, legislators worldwide have been discussing the merits of regulating their national audit markets. In this debate, the focus has primarily been on the regulations' effects on incentives, both those of preparers of financial statements to report truthfully and those of auditors to detect errors or even fraud and to correctly report their findings to the public. For some of the proposed measures, the empirical evidence as to whether they indeed improve such incentives remains inconclusive. In addition, there is a concern that certain regulations could negatively affect the structure of the audit market. Changes in the market structure, in turn, can either attenuate or reinforce the regulations' effects on preparers' and auditors' incentives. To a large extent, this unintended side-effect has been neglected in the discussions. We adapt a spatial competition model to the audit market. This model allows simultaneously analyzing the incentive and market structure effects resulting from regulations and thus determining their overall impact.

  • Three essays on selected topics in finance

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  • Kärner, Tobias; Minkley, Nina; Rausch, Andreas; Schley, Thomas; Sembill, Detlef (2018): Stress and Resources in Vocational Problem Solving Vocations and Learning. 2018, 11(3), pp. 365-398. ISSN 1874-785X. eISSN 1874-7868. Available under: doi: 10.1007/s12186-017-9193-8

    Stress and Resources in Vocational Problem Solving

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    By adapting the job demands-resources model of Demerouti et al. Journal of Applied Psychology, 86(3), 499–512, (2001) to vocational problem-solving situations, we aimed to investigate how, and to what extent, problem-solving demands and personal resources affect stress responses and task interest. Therefore, we used a problem-solving task from the business administration domain in a computer-based office simulation. We assigned 58 participants into two groups. The treatment group worked on the problem scenario, whereas the control group was instructed to inspect the computer-based scenario and to check the software’s usability without solving the problem. Problem-solving demands, perceived stress, task interest, cardiovascular parameters, and cortisol concentration were assessed before, during and after the task at several time points. The vocational problem-solving task was associated with perceived time pressure, uncertainty, mental effort, task difficulty, and perceived stress. In addition, we found higher heart rate and cortisol concentration and lower heart rate variability values in the treatment group (compared to the control group) at the end of the task. Furthermore, we found that content knowledge buffers the impact of problem-solving demands on stress responses and it maintains task interest under high mental effort. Overall, we found evidence that vocational problem-solving activities bear stress-evoking potential and personal resources may provide buffering and maintaining functions.

  • The effects of value-added quality information on the outcomes of school choice : a further development and application of the microsimulation approach

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    dc.contributor.author: Stützle, Philipp

  • Neuenschwander, Markus P.; Hofmann, Jan; Jüttler, Andreas; Schumann, Stephan (2018): Professional Desires and Career Decisions : Effects of Professional Interests, Role Models, and Internship in Lower Secondary School International Journal for Research in Vocational Education and Training. 2018, 5(3), pp. 226-243. eISSN 2197-8646. Available under: doi: 10.13152/IJRVET.5.3.5

    Professional Desires and Career Decisions : Effects of Professional Interests, Role Models, and Internship in Lower Secondary School

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    Context: Following the social cognitive career theory of Lent, Brown, and Hackett (1994), the current study examines the effect of role models’ professions and practical internship experiences on the choice of professional environment independent of professional interests. Embedded in the Swiss context with its strong vocational training system, the paper outlines to what extent the desired professional environment is realized in the chosen apprenticeship two years later and how this realization can be predicted. The theoretical model proposes that students form direct professional experiences during their first internship(s). If those experiences are positive, students choose an apprenticeship in the same professional environment. Students have indirect (vicarious) professional experiences through their role models. If those experiences are positive, students choose an apprenticeship in the role model’s professional environment. The study examined whether, independent of professional interests, direct experiences in internships and indirect experiences through role models’ professions predict the realization of a desired professional environment in an apprenticeship.

    Method: The longitudinal sample consists of N = 348 seventh- and ninth-grade students from four German-speaking Swiss cantons. Professional interests and environments were measured using standardized questionnaires. The professional environments of the desired professions, the chosen apprenticeships, the role model’s professions, and the internship’s professions were coded using Holland’s (1997) interest types: realistic, investigative, artistic, social, enterprising, and conventional (RIASEC).

    Results: In 53% of the cases, students chose an apprenticeship in the professional environment they desired. In 53% of the cases, the chosen professional environment corresponded with the professional environment of the student’s two most important role models. In 39% of the cases, those role models were their parents. By means of logistic regression analyses, we can show that role models’ professional environments and the professional environment of the first internship influenced the realization of the desired professional environment at the end of lower secondary school, independent of the effect of the individuals’ interests.

    Conclusions: Results show that direct professional experiences in internships and indirect experiences of role models influence the realization of the desired professional environment, independent of professional interests. In a contextual approach, career counselling should include the role model’s profession and how it corresponds with the client’s interests and professional desires. Moreover, role models, especially parents, have a responsibility to reflect on how their goals influence students’ career choice processes.

  • Wolter, Felix; Herold, Lucie (2018): Sensitive Questions in Surveys : Testing the Item Sum Technique (IST) to Tackle Social Desirability Bias SAGE Research Methods Cases Part 2. London: SAGE. Available under: doi: 10.4135/9781526441928

    Sensitive Questions in Surveys : Testing the Item Sum Technique (IST) to Tackle Social Desirability Bias

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    Many surveys contain sensitive questions, for example, questions on sexuality, substance abuse, self-reported delinquency, or attitudes to foreigners. When answering such questions in survey interviews, many respondents do not respond truthfully and overreport positively connoted behaviors or attitudes (e.g., having voted in elections) and underreport negatively connoted ones (e.g., shoplifting). Also, many respondents refuse to answer at all, especially to questions on income. These phenomena are called social desirability bias and cause survey data to be not valid. We report the planning, design, process, difficulties, and results from a research project in which the item sum technique (IST) was experimentally tested against standard direct questioning (DQ) to tackle the problem of social desirability bias. The IST is a special questioning technique that, by adding random noise to the respondents’ answers, anonymizes the interview situation and therefore raises respondent protection. In our project, IST was compared to DQ for the income question and a question on self-reported alcohol consumption. A CATI (computer-assisted telephone interviewing) survey (N = 499) in Mainz, Germany, provides the empirical data. The key findings show that nonresponse to the income question is reduced considerably by IST. Regarding self-reported alcohol consumption, the slightly higher estimates in IST format (as compared to DQ) fail to be statistically significant for the whole sample. For male and for higher educated respondents, however, IST yields significantly higher estimates of self-reported alcohol consumption.

  • Bleibtreu, Christopher; Stefani, Ulrike (2018): The Effects of Mandatory Audit Firm Rotation on Client Importance and Audit Industry Concentration The Accounting Review. 2018, 93(1), pp. 1-27. ISSN 0001-4826. eISSN 1558-7967. Available under: doi: 10.2308/accr-51728

    The Effects of Mandatory Audit Firm Rotation on Client Importance and Audit Industry Concentration

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    We appreciate the helpful comments of W. Robert Knechel, J. Reed Smith, Thomas Hemmer (editor), and two anonymous referees. We also thank the participants in the 2013 Workshop on Analytical Research in Financial Accounting, the 2013 Asian-Pacific Conference on International Accounting Issues, the 2014 Annual Congress of the European Accounting Association, the 2014 American Accounting Association Annual Meeting, the 2015 Annual Meeting of the German Academic Association for Business Research, and the 2015 European Auditing Research Network Conference for their valuable remarks and suggestions.

    An earlier version of this paper won the Vernon Zimmerman Best Paper Award for the 2013 25th Asian-Pacific Conference on International Accounting Issues.

  • Three Essays on Corporate Governance using RDD applied to Close Votes on Shareholder Proposals

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  • Neumeier, Christian; Sørensen, Todd; Webber, Douglas (2018): The Implicit Costs of Motherhood over the LifeCycle : Cross-Cohort Evidence from Administrative Longitudinal Data Southern Economic Journal. 2018, 84(3), pp. 716-733. ISSN 0038-4038. eISSN 2325-8012. Available under: doi: 10.1002/soej.12239

    The Implicit Costs of Motherhood over the LifeCycle : Cross-Cohort Evidence from Administrative Longitudinal Data

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    It is well known that the explicit costs of raising a child have grown over the past several decades. Less well understood are the implicit costs of having a child, and how they have changed over time. In this article, we are the first to examine the evolution of the implicit costs of motherhood over the lifecycle and across generations using high quality administrative data. We estimate that the lifetime labor market income gap between mothers and women who never have children (never-mothers) decreases from around $350,000 to $280,000 between women born in the late 1940s and late 1960s. Gaps tend to increase monotonically over the lifecycle, and decrease monotonically between cohorts. Our evidence suggests that changes in the gaps are caused by changing labor force participation rates.

  • Franke, Günter (2018): Sind stiftungsgetragene Unternehmen „besser“? ACHLEITNER, Ann-Kristin, ed. and others. Stiftungsunternehmen : Theorie und Praxis : Grundlagen, Perspektiven, Fallbeispiele. Wiesbaden: Springer Gabler, 2018, pp. 69-95. ISBN 978-3-658-18989-1. Available under: doi: 10.1007/978-3-658-18990-7_5

    Sind stiftungsgetragene Unternehmen „besser“?

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    Die Corporation ist wiederholt in die Kritik geraten, weil sie einseitig auf die Interessen der Gesellschafter abstellt. Ein alternatives Unternehmensmodell berücksichtigt die Interessen der verschiedenen Stakeholder eines Unternehmens. Eine besondere Variante dieses Modells zeigt sich bei stiftungsgetragenen Unternehmen. An diesen ist eine Stiftung beteiligt. Sie hat keine Gesellschafter, sodass ihr Gewinnstreben geschwächt sein kann. Der Beitrag skizziert Befunde zu deutschen stiftungsgetragenen Unternehmen und fragt, ob es in diesen eher zu einem fairen Interessenausgleich kommt. Auch wenn die Befunde dies partiell stützen, bleibt der Vorstand der Stiftung eine Schwachstelle. Es ist nicht klar, welche Interessen er verfolgt. Transparenz und Kontrolle der Tätigkeit des Stiftungsvorstands sind erforderlich, um sicherzustellen, dass er seine Aufgaben im Geiste des Stifters wahrnimmt.

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