Mostrando recursos 1 - 20 de 94

  1. A Framework to Interpret Nonstandard Log-Linear Models

    Mair, Patrick
    The formulation of log-linear models within the framework of Generalized Linear Models offers new possibilities in modeling categorical data. The resulting models are not restricted to the analysis of contingency tables in terms of ordinary hierarchical interactions. Such models are considered as the family of nonstandard log-linear models. The problem that can arise is an ambiguous interpretation of parameters. In the current paper this problem is solved by looking at the effects coded in the design matrix and determining the numerical contribution of single effects. Based on these results, stepwise approaches are proposed in order to achieve parsimonious models. In addition, some testing strategies are presented to test such...

  2. Brown's Original Fictitious Play

    Berger, Ulrich
    What modern game theorists describe as fictitious play is not the learning process George W. Brown defined in his 1951 paper. Brown's original version differs in a subtle detail, namely the order of belief updating. In this note we revive Brown's original fictitious play process and demonstrate that this seemingly innocent detail allows for an extremely simple and intuitive proof of convergence in an interesting and large class of games: nondegenerate ordinal potential games.

  3. Two More Classes of Games with the Continuous-Time Fictitious Play Property

    Berger, Ulrich
    Fictitious Play is the oldest and most studied learning process for games. Since the already classical result for zero-sum games, convergence of beliefs to the set of Nash equilibria has been established for several classes of games, including weighted potential games, supermodular games with diminishing returns, and 3×3 supermodular games. Extending these results, we establish convergence of Continuous-time Fictitious Play for ordinal potential games and quasi-supermodular games with diminishing returns. As a by-product we obtain convergence for 3×m and 4×4 quasi-supermodular games.

  4. Evaluation zwischen Leistungsmessung und Lernschleife

    Martinuzzi, Robert-Andre; Meyer, Wolfgang; Kopp, Ursula
    Nachhaltige Entwicklung ist zu einem Leitmotiv von Politiken, Programmen und Projekten geworden. Doch wer entscheidet, was tatsächlich nachhaltig wirkt und auf Basis welcher Daten und Fakten? Das Projekt EASY ECO trainiert dazu Nachwuchsforscher aus ganz Europa und vermittelt Einblicke in die Evaluationspraxis.

  5. R&D Spillovers: A Non-Spatial and a Spatial Examination

    Gumprecht, Daniela
    In recent years there were many debates and different opinions whether R&D spillover effects exist or not. In 1995 Coe and Helpman published a study about this phenomenon, based on a panel dataset, that supports the position that such R&D spillover effects are existent. However, this survey was criticized and many different suggestions for improvement came from the scientific community. Some of them were selected and analysed and finally led to a new model. And even though this new model is well compatible with the data, it leads to different conclusions, namely that there does not exist an R&D spillover effect. These different results were the motivation to run...

  6. Spatial Filtering with EViews and MATLAB

    Ferstl, Robert
    This article summarizes the ideas behind a few programs we developed for spatial data analysis in EViews and MATLAB. They allow the user to check for spatial autocorrelation using Moran's I and provide a spatial filtering procedure based on the Gi statistic by Getis and Ord (1992). We have also implemented graphical tools like Moran Scatterplots for the detection of outliers or local spatial clusters.

  7. Charakteristika eines finanz-dominierten Akkumulationsregimes in Europa

    Stockhammer, Engelbert
    Die Beziehungen zwischen dem realen Sektor und dem Finanzsektor sind im Umbruch. Heftige Zyklen auf den Aktienmärkten und Wechselkurskrisen sind dafür die augenfälligsten Beispiele. Ökonomisch ebenso wichtig sind die zunehmende Verschuldung privater Haushalte und die Shareholder Value-Orientierung bei produzierenden Unternehmen. Welche Muster weist nun ein von der "Finanzialisierung" geprägtes Wirtschaftssystem auf? Und was bedeutet dies für Wachstum und wirtschaftliche Stabilität? (author's abstract)

  8. Total factor productivity effects of interregional knowledge spillovers in manufacturing industries across Europe

    Scherngell, Thomas; Fischer, Manfred M.; Reismann, Martin
    The objective of this study is to identify knowledge spillovers that spread across regions in Europe and vary in magnitude for different industries. The study uses a panel of 203 NUTS-2 regions covering the 15 pre-2004 EU-member-states to estimate the impact over the period 1998-2003, and distinguish between five major industries. The study implements a fixed effects panel data regression model with spatial autocorrelation to estimate effects using patent applications as a measure of R&D output to capture the contribution of R&D (direct and spilled-over) to regional productivity at the industry level. The results suggest that interregional knowledge spillovers and their productivity effects are to a substantial degree...

  9. The road toll for heavy vehicles in the Czech Republic. Charts for calculating toll costs for trucks in the combined shipment and less-than-truckload sector in the Czech Republic

    Kummer, Sebastian; Einbock, Marcus; Nagl, Philipp; Schlaak, Jan-Philipp
    (no abstract available)

  10. Die tschechische LKW-Maut. Gutachten und Kalkulations-Tabellen: Tabellen zur Berechnung der Kosten der tschechischen Lkw-Maut im Spediteursammelgut- und Teilladungsverkehr

    Kummer, Sebastian; Einbock, Marcus; Nagl, Philipp; Schlaak, Jan-Philipp
    (kein Abstract vorhanden)

  11. Untersuchung der Auswirkungen einer Kfz-Steuersenkung in Österreich. Kurzstudie

    Kummer, Sebastian; Nagl, Philipp; Einbock, Marcus
    (kein Abstract vorhanden)

  12. Kostenmäßige Auswirkungen der Veränderung der Arbeitszeitrechtsregelungen auf Straßengüterverkehrsunternehmen

    Kummer, Sebastian; Einbock, Marcus
    (kein Abstract vorhanden)

  13. Lead users and the adoption and diffusion of new products: Insights from two extreme sports communities

    Schreier, Martin; Oberhauser, Stefan; Prügl, Reinhard Wilhelm
    Lead users are proposed as a valuable resource for marketers in terms of the (1) development, (2) adoption, and (3) diffusion of new products. We present the first consumer study to provide evidence that the latter two suggestions are justified. First, we find that lead users demonstrate stronger domain-specific innovativeness than more "ordinary" users. Second, lead users perceive new technologies as less "complex" and might therefore be better prepared to adopt them. Third, we find that lead users demonstrate stronger opinion leadership and weaker opinion seeking tendencies. Finally, we discuss the implications of our findings for the marketing of new products. (authors' abstract)

  14. What a Difference a DV Makes ... The Impact of Conceptualizing the Dependent Variable in Innovation Success Factor Studies

    Dömötor, Rudolf; Franke, Nikolaus; Hienerth, Christoph
    The quest for the "success factors" that drive a company's innovation performance has attracted a great deal of attention among both practitioners and academics. The underlying assumption is that certain critical activities impact the innovation performance of the company or the project. However, the findings of success factor studies lack convergence. It has been speculated that this may be due to the fact that extant studies have used many different measures of the dependent variable "innovation performance". Our study is the first to analyze this issue systematically and empirically: we analyze the extent to which different conceptualizations of the dependent variable (a firm's innovation performance) lead to different...

  15. Warenflusskontrolle in der Fairtrade Kaffee Supply Chain

    Rachbauer, Thomas
    In Zeiten zunehmend globaler Wertschöpfungsketten und damit komplexerer und intransparenter Warenströme, werden Konsumenten immer mehr bedacht darauf, einer Instanz vertrauen zu können, welche sogenannte Gütesiegel vergibt. Im Fall von FAIRTRADE handelt es sich um ein überwiegend soziales Siegel, welches für faire Löhne/Preise und menschenwürdige Arbeitsbedingungen steht. Um dieses Vertrauen zu rechtfertigen muss ein effektives Kontrollsystem für den Waren- und Geldfluss etabliert sein. 70% der österreichischen Konsumenten halten die Hersteller- bzw. Ursprungsgarantie für sehr wichtig oder wichtig für das Image von FAIRTRADE. 92% für sehr wichtig bis mittelmäßig wichtig. Diese Zahlen zeigen die Priorität der Kontrolle durch FLOCert und die Bedeutung der...

  16. Supply chain management bei Mergers & Acquisitions

    Hammer, Christian
    (kein Abstract vorhanden)

  17. RFID - Anwendungen in der Logistik

    Lenzbauer, Sabine
    (...) Die Autorin ist der Ansicht, dass trotz der vielfältigen Vorteile und Stärken der RFID-Technologie auch in Zukunft noch ein paralleler Einsatz von RFID und Barcode in der Praxis anzutreffen sein wird. Vertrauen in die Transponder-Technik muss aufgebaut, das vollständige Nutzenpotenzial teilweise erst noch erkannt werden. Trotzdem wird die Ablösung des Barcodes durch RFID kommen, der genaue Zeitpunkt wird dabei von der Entwicklung der Kosten, der weiteren Standardisierungstätigkeit sowie der Datenschutzregelungen und der allgemeinen Akzeptanz abhängig sein.(...) (author's abstract)

  18. Entwicklung und Bedeutung von Build to Order Konzepten in der Supply Chain globaler Automobilhersteller

    Frühbauer, Roman
    Implementing Build to Order (BTO) strategies instead of usual Build to Stock have the potential of sorting out some individual problems of the automotive industry (e.g. high stock of finished goods). BTO reconnects the customer to the Supply Chain by focusing on him/her and making him/her to the starting point of the production process. Consequently some objectives like stock reduction as well as an increase of market shares and profits are linked with BTO. However, some requirements and preconditions have to be fulfilled to realize BTO strategies. First of all flexibility across processes, products and volume have to be assured....

  19. Development of Distribution Logistics for Fast Moving Consumer Goods in Poland

    Hausmaninger, Martin
    This work analyzes the current situation of distribution logistics in Poland and tries to anticipate future developments in this area. It demonstrates, how the current economic growth and EU membership of Poland since 2004 influences these developments. The focus is on availability of infrastructure, cost of operations, the European distribution structure and distribution channel structures. The research shows that conditions for distribution operations in Poland are on the one hand good, because operation costs are low and warehouse space is cheap and sufficient in supply. On the other hand, the slow development of the road infrastructure and other issues cause...

  20. Viability of the Premium Airline Business Model - Analysis of business class-only services offered by Eos Airlines, MAXjet Airways and Lufthansa, Swiss, KLM in cooperation with PrivatAir Herausgeber: die

    Kuchta, Marek
    Between 2002 and 2005, Lufthansa, Swiss and KLM in cooperation with PrivatAir, start-up airlines Eos and MAXjet individually, launched scheduled business class-only services between Europe and the US. This paper qualitatively analyses the new business model from the strategic and operational point of view. Different approaches based on pull or push motivation have been identified and the characteristics of the service offerings extensively examined. From the strategic aspect, the analysis has proven that the products have an inherent value benefit for the respective target group. It has been established that short and ultra-long haul routes are not viable for the...

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