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E-Finance
(2003)
E-Government : von der Portalisierung zur umfassenden Neugestaltung öffentlicher Leistungserbringung
(2004)
In some countries including Germany unemployed workers can increase their income by working a few hours per week. The intention is to keep unemployed job seekers attached to the labour market and to increase their job-finding probabilities. To analyze the unemployment dynamics of job seekers with and without marginal employment, we consider an inflow sample into unemployment and estimate multivariate duration models. While we do not find any significant impact on the job finding probability in a model with homogeneous effects, models allowing for time-varying coefficients indicate a decreased job finding probability of marginal employment at the beginning of the unemployment spell and an increased job finding probability for the long-term unemployed. Our results suggest that job seekers with marginal employment find more stable post-unemployment jobs, and we find some evidence that the relationship between marginal employment and wages and employment stability varies with respect to skill levels, sector and labor market tightness. (C) 2016 Elsevier B.V. All rights reserved.
Economy vs. history : what does actually determine the distribution of firms' locations in cities?
(2004)
Economy vs. history : what does actually determine the distribution of shops' locations in cities?
(2009)
This study examines in which cases economic forces or historical singularities prevail in the determination of the spatial distribution of retail shops. We develop a model of location choice in discrete space. The main force towards an agglomerated structure is the reduction of transaction costs for consumers if retailers are located closely, whilst competition and transport costs work towards a disperse structure. We assess the importance of the initial conditions by simulating the resulting distribution of shops for identical economic parameters but varying initial settings. If the equilibrium distributions are similar we conclude that economic forces have prevailed, while dissimilarity indicates that 'history' is more important. The (dis)similarity of distributions of shops is calculated by means of a metric measure.
The chapter aims at addressing collaboration between the two main professional organizations in the field of Public Administration in Europe—the European Group of Public Administration (EGPA) and the Network of Institutes and Schools of Public Administration in Central and Eastern Europe (NISPAcee)—in their contribution to understanding, creating and institutionalizing the European Administrative Space. While the chapter gives an overview of both informal collaboration between Eastern and Western European scholars, and a joint accreditation initiative (EAPAA), its main focus is on Trans-European Dialogue (TED). The chapter outlines the challenges for the future of TED and proposes other potential ways of EGPA-NISPAcee collaboration.
Dieser Artikel adressiert zwei bisher nur wenig untersuchte Aspekte der Führungsforschung: Führungsverhalten im öffentlichen Sektor und Faktoren die Führungsverhalten beeinflussen. Mittels einer Fallstudie in der Bundesagentur für Arbeit werden explorativ Hypothesen über Einflussfaktoren des Führungsverhaltens aufgestellt. Die Studie kommt zu der Erkenntnis, dass eine oftmals angenommene Führungslücke im öffentlichen Sektor nicht bestätigt werden kann. Für das ausgeprägte Führungsverhalten, das in der Fallstudie beobachtet wurde, wird als Determinante die besondere Ausgestaltung des Managementsystems der Bundesagentur für Arbeit verantwortlich gemacht. Dazu gehört unter anderem das Performance Management System sowie die Führungskräfteauswahl und -entwicklung. Die Arbeit schließt mit Empfehlungen für weitere Forschungsansätze auf dem Gebiet der Führungsforschung im öffentlichen Sektor.
Einführung
(2013)
Einleitung
(2012)
In a multilevel model of leadership behavior, we investigated whether and how empowering leadership affects individuals' career perceptions. We developed a conceptual model that links empowering leadership at the individual level and at the group level (mean as well as dispersion) to individuals' career self-efficacy and career satisfaction. To test our model, we used questionnaire data from a multilevel data set of 2493 employees in leadership positions nested in 704 teams from a large German corporation. Hierarchical linear regression analyses showed that empowering leadership at the individual level was positively related to career self-efficacy, which in turn mediated the relationship between empowering leadership and career satisfaction. Empowering leadership at the group level was positively related to career self-efficacy when it was conceptualized as leadership differentiation (i.e., the standard deviation of empowering leadership ratings), but not when it was conceptualized as leadership climate (i.e., mean empowering leadership ratings). Career self-efficacy in turn mediated the relationship between empowering leadership differentiation and career satisfaction. Finally, we found a negative relationship between empowering leadership. differentiation and career satisfaction. (C) 2015 Elsevier Inc. All rights reserved.
In this paper we examine the relationship between the default risk of banks and sovereigns, i.e. the 'doom-loop'. Specifically, we try to assess the effectiveness of the implementation of the new recovery and resolution framework in the European Union. We use a panel with daily data on European banks and sovereigns ranging from 2012 to 2016 in order to test the effects of the Bank Recovery and Resolution Directive on the two-way feedback process. We find that there was a pronounced feedback loop between banks and sovereigns from 2012 to 2014. However, after the implementation of the European Banking Union, in 2015/2016, the magnitude of the doom-loop decreased and the spillovers became not statistically significant. Furthermore, our results suggest that the implementation of the new resolution framework is a suitable candidate to explain this finding. Overall, the results are robust across several specifications.
This paper describes the equilibrium properties and dynamics of a model which combines the key features of the standard incomplete market model (Aiyagari, 1994) with a standard endogenous growth mechanism to gain a deeper understanding of the feedback effects between growth and wealth inequality in the presence of credit frictions and idiosyncratic risk. We characterize growth equilibria and find that a balanced growth path not necessarily exists if households are subject to ad hoc borrowing constraints. Growth, inequality, and risk are positively related in our model, but we also identify a hump-shaped relationship between welfare and risk, indicating a tradeoff relationship between risk-pooling and growth in the determination of welfare. The growth rate responds to changes in the wealth distribution and displays transitional dynamics towards the balanced growth path. (C) 2015 Elsevier Inc. All rights reserved.
This article addresses security and privacy issues associated with storing data in public cloud services. It presents an architecture based on a novel secure cloud gateway that allows client systems to store sensitive data in a semi-trusted multi-cloud environment while providing confidentiality, integrity, and availability of data. This proxy system implements a space-efficient, computationally-secure threshold secret sharing scheme to store shares of a secret in several distinct cloud datastores. Moreover, the system integrates a comprehensive set of security measures and cryptographic protocols to mitigate threats induced by cloud computing. Performance in practice and code quality of the implementation are analyzed in extensive experiments and measurements. (C) 2016 Elsevier B.V. All rights reserved.
In diesem Handbuch steht die Nutzerorientierung im Vordergrund. Namhafte Autoren aus Wissenschaft und Praxis beschaeftigen sich in 16 Kapiteln mit Web-Suchmaschinen, die die Vorreiter hinsichtlich des sich veraendernden Nutzerverhaltens sind. Das bei Google und Co. erlernte Verhalten wird auf andere Suchsysteme uebertragen: die Website- Suche, die Intranet-Suche und die Suche in Spezialsuchmaschinen und Fachdatenbanken. Fuer alle Anbieter von Informationssystemen wird es zunehmend wichtig, einerseits die Arbeitsweise von Suchmaschinen zu kennen, andererseits mit dem Verhalten Ihrer Nutzer vertraut zu sein. Auf der Seite der Wissenschaftler werden Informatiker, Informationswissenschaftler, Medienwissenschaftler und Bibliothekswissenschaftler angesprochen. Fuer Entwickler bietet dieses Handbuch einen ueberblick ueber Moeglichkeiten fuer Suchsysteme, gibt Anregungen fuer Umsetzung und zeigt anhand von bestehenden Loesungen, wie eine Umsetzung aussehen kann. Fuer Entscheider, Rechercheure und Informationsvermittler bietet das Buch lesbare ueberblicksartikel zu relevanten Themenbereichen, auf deren Basis eine Strategie fuer individuelle Suchloesungen erarbeitet werden kann. Als dritte Praktiker gruppe sind u.a. Berater, Lehrer, Journalisten und Politiker zu nennen, die sich zu den wichtigsten Themen rund um die Suche informieren moechten.
Entrepreneurship is a regional and persistent phenomenon. We jointly investigate spatial dependence and serial dynamics of new business formation. Using panel data from all 402 German counties for 1996-2011, we estimate dynamic spatial panel data models of start-up activity in the high-tech and manufacturing industries. We consider regions of different sizes and systematically search for the most suitable spatial weights matrices. We find substantial spatial dependence as well as time persistence of start-up activity, especially in the high-tech industry. This suggests that local start-up activity has positive extemal effects and that entrepreneurship policy could play an efficiency-enhancing role.
Entrepreneurial Marketing
(2015)
Long-term value creation is expected not only to be concerned with maximizing shareholder value but also includes the impact on other stakeholders and the environment. Environmental, social, and governance (ESG) issues are therefore gaining increasing importance, in line with the growing demand for corporate sustainability. ESG ratings foster the comparison of companies with respect to their sustainable practices. This study aims to investigate how ESG ratings impact financial performance in the European food industry. Ordinary least squares regression is applied to analyze the relation between ESG ratings and financial performance over a 4-year period from 2017 to 2020. The profitability measures Return on Assets (ROA) and Return on Equity (ROE) are employed as financial performance measures, while ESG ratings are obtained from the database CSRHub. Results show that higher ESG ratings are associated with better financial performance. Although the effect is modest in the present study, the findings support previous results that ESG ratings are positively related to financial performance. Nonetheless, they also highlight that ESG ratings strongly converge to the mean, which depicts the need to reassess whether ESG ratings are able to measure actual ESG behavior.
Equity crowdfunding
(2021)
In this study, we explore the development of equity crowdfunding (ECF) over the next 5 to 10 years by conducting an international Delphi study. Our results indicate that the ECF market is expected to grow significantly. However, it is unlikely to disrupt other forms of financing and will not cover all SME financing needs. ECF will remain a funding technique for SMEs and small investors; it is unlikely to attract large corporations or institutional investors. Platforms will impose stricter requirements for capital raisers, expand their services, and innovate their business models. National governments will probably partly liberalize the ECF market.
Erhöhung der Wandlungsfähigkeit von ECM-Lösungen unter Verwendung kartographischer Gestaltungsmittel
(2008)
Bei Entscheidungen über abzulösende oder neue Anwendungssysteme kann mit Hilfe funktionaler Anforderungen immer nur der gegenwärtige oder vorhersehbare Bedarf ermittelt werden. In einem turbulenten Umfeld sind die Anwendungssysteme jedoch häufig langere Zeit im Einsatz als die Anforderungen gültig sind, mit Hilfe derer sie ausgewählt wurden. An der Universität Potsdam wird im Rahmen des BMBF-Projektes CHANGE eine Vorgehensweise zur Ermittlung der Zukunftsfähigkeit unternehmensweiter Anwendungssysteme entwickelt, deren wesentliche Merkmale in diesem Beitrag beschrieben werden.
ERP und MES : Teil 3
(2008)
ERP-Qualifikation
(2005)
Der Produktivgang (Go-Live) ist immer ein empfindlicher Zeitpunkt während einer ERPEinführung. Hier wird der Anwender erstmalig zu einem wichtigen Erfolgsfaktor für das gesamte ERP-Projekt. Die Verfügbarkeit von qualifizierten Anwendern und somit auch deren Ausbildung spielt eine entscheidende Rolle bei einer ERP- Einführung und setzt eine fachgerechte Qualifizierung voraus.
Nonparametric efficiency analysis has become a widely applied technique to support industrial bench-marking as well as a variety of incentive-based regulation policies. In practice such exercises are often plagued by incomplete knowledge about the correct specifications of inputs and outputs. Simar and Wilson (Commun Stat Simul Comput 30(1): 159-184, 2001) and Schubert and Simar (J Prod Anal 36(1): 55-69, 2011) propose restriction tests to support such specification decisions for cross-section data. However, the typical oligopolized market structure pertinent to regulation contexts often leads to low numbers of cross-section observations, rendering reliable estimation based on these tests practically unfeasible. This small-sample problem could often be avoided with the use of panel data, which would in any case require an extension of the cross-section restriction tests to handle panel data. In this paper we derive these tests. We prove the consistency of the proposed method and apply it to a sample of US natural gas transmission companies from 2003 through 2007. We find that the total quantity of natural gas delivered and natural gas delivered in peak periods measure essentially the same output. Therefore only one needs to be included. We also show that the length of mains as a measure of transportation service is non-redundant and therefore must be included.
EU und Osteuropa
(1998)
Eu-Osteuropa
(1997)
Euro und Wirtschaftspolitik
(1998)
Process oriented knowledge management focuses on knowledge intensive business processes. For modelling and analysis of these processes the modelling technique KMDL (Knowledge Modeling and Description Language) has been developed. KMDL is a method to describe knowledge flows and conversions along and between business processes. Thereby KMDL identifies existing and utilized information as well as knowledge of individual participants and of the entire company. This research-in-progress contribution introduces a practical example in the field of software engineering, in which KMDL models are evaluated to identify process improvements, e.g. by adding knowledge management activities. Therefore three individual views focussing on selected aspects of interest are introduced.
Since Eastern Germany's conversion to a market economy wages have remained considerably below the West German wage level. This article looks at the role of establishment-specific factors-such as sectoral affiliation and size of the labour force-in this process. A non-parametric decomposition that has played a prominent role in the gender wage gap literature is applied to breakdown the East-West wage gap into its constituent components. Using establishment data from German employment statistics, the article demonstrates that the catching-up process of Eastern Germany's wage level is hindered by the shift in its economic structure towards lower-paying types of companies, which has caused the lagging behind in the adjustment of wages
Explaining the Use of Performance Information by Public Managers: A Planned-Behavior Approach
(2015)
This article examines the use of performance information by public managers. It reviews literature on the impact of attitudes and social norm and puts forward a psychological-cognitive model based on the theory of planned behavior. The article finds support for this model emphasizing that performance data use is a goal-directed, reasoned action. Another critical result is that managers who consciously intend to use performance data also make sure that the data in their division are of good quality which, in turn, fosters information use. These findings indicate thatin addition to organizational routinescognitive factors are promising starting points for interventions to foster managers' data use. The article is based on survey data from German cities.
Die Autoren stellen einen Ansatz vor, mit dem das Erfahrungswissen über die Produktionsregelung mit künstlichen neuronalen Netzen so aufgearbeitet und strukturiert werden kann, dass mittels des fallbasierten Schließens für neue Produktionssituationen die geeigneten und entsprechend voreingestellten neuronalen Netze ausgewählt werden können. Aufbauend auf den so gewonnenen Ergebnissen wird ein fallbasiertes System entwickelt.
Finanzmärkte und Sicherheit
(2005)
Finanzplanung
(2015)
Fiskalischer Fröderalismus als Mittel friedlicher Integration : das Beispiel Bosnien und Herzegowina
(2003)
Flucht vor dem Finanzamt
(1996)
Robo advisors represent a digital financial advice solution challenging traditional wealth and asset management, investment advice, retirement planning, and tax-loss harvesting. Based on algorithms, big data analysis, machine learning, and other technologies, these services minimize the necessity for human intervention. Based on an international three-stage Delphi study, we provide a plausible forecast of the development of the robo advisor industry, with regards to market development, competition, drivers of growth, customer segments, challenges, services, technologies, and societal change. The results suggest that the financial advice market will experience a further increase in the number of robo advisor services available. Existing and traditional financial advice players will be forced to adjust to the changing environment of the market. Due to low fees and ease of use, robo advisors will be made available to a broad cross section of society, and will cause significant market losses for traditional investment advice companies. Ten years from now, the predominant investment class will remain Exchange Traded Funds (ETFs). Even though degrees of human intervention are expected to vary considering the complexity of advice, automation will increase in significance when it comes to the development of robo advisors.