@inproceedings{HerzwurmPietsch2013, author = {Herzwurm, Georg and Pietsch, Wolfram}, title = {Introduction of RePriCo'13}, series = {19th International Working Conference on Requirements Engineering: Foundation for Software Quality (REFSQ 2013) : proceedings of the REFSQ 2013 Workshops CreaRE, IWSPM, and RePriCo, the REFSQ 2013 Empirical Track (Empirical Live Experiment and Empirical Research Fair), the REFSQ 2013 Doctoral Symposium, and the REFSQ 2013 Poster Session. ICB-research report. No. 56}, booktitle = {19th International Working Conference on Requirements Engineering: Foundation for Software Quality (REFSQ 2013) : proceedings of the REFSQ 2013 Workshops CreaRE, IWSPM, and RePriCo, the REFSQ 2013 Empirical Track (Empirical Live Experiment and Empirical Research Fair), the REFSQ 2013 Doctoral Symposium, and the REFSQ 2013 Poster Session. ICB-research report. No. 56}, publisher = {Duisburg-Essen}, address = {Univ.}, issn = {ISSN 1860-2770 (Print ) ; ISSN 1866-5101 (Online)}, pages = {103 -- 105}, year = {2013}, language = {en} } @article{GoedhuysJanzMohnen2014, author = {Goedhuys, Micheline and Janz, Norbert and Mohnen, Pierre}, title = {Knowledge-based productivity in "low-tech" industries: evidence from firms in developing countries}, series = {Industrial and corporate change}, volume = {23}, journal = {Industrial and corporate change}, number = {1}, publisher = {Oxford University Press}, address = {Oxford}, issn = {1464-3650 (E-Journal); 0960-6491 (Print)}, doi = {10.1093/icc/dtt006}, pages = {1 -- 23}, year = {2014}, abstract = {Using firm-level data from five developing countries—Brazil, Ecuador, South Africa, Tanzania, and Bangladesh—and three industries—food processing, textiles, and the garments and leather products—this article examines the importance of various sources of knowledge for explaining productivity and formally tests whether sector- or country-specific characteristics dominate these relationships. Knowledge sources driving productivity appear mainly sector specific. Also differences in the level of development affect the effectiveness of knowledge sources. In the food processing sector, firms with higher educated managers are more productive, and in least-developed countries, additionally those with technology licenses and imported machinery and equipment. In the capital-intensive textiles sector, productivity is higher in firms that conduct R\&D. In the garments and leather products sector, higher education of the managers, licensing, and R\&D raise productivity.}, language = {en} } @phdthesis{Schmitz2007, author = {Schmitz, Philipp}, title = {Empirical analyses of the trading behavior of individual investors in the warrant market}, pages = {XVI, 172 S.}, year = {2007}, language = {en} } @incollection{Pietsch2013, author = {Pietsch, Wolfram}, title = {A framework for strategic positioning of IT-products}, series = {Software business : from physical products to software services and solutions : 4th International Conference on Software Business, ICSOB 2013; Potsdam; Germany; 11 June 2013 through 14 June 2013. (Lecture notes in business information processing ; 150)}, booktitle = {Software business : from physical products to software services and solutions : 4th International Conference on Software Business, ICSOB 2013; Potsdam; Germany; 11 June 2013 through 14 June 2013. (Lecture notes in business information processing ; 150)}, publisher = {Springer}, address = {Berlin}, doi = {10.1007/978-3-642-39336-5_11}, pages = {102 -- 116}, year = {2013}, abstract = {IT Products are viewed and managed differently depending on the perspectives and the stage within the life cycle. A model is presented that integrates different perspectives and stages serving as an aid for the analysis of business models and focused positioning of IT-products. Four generic business models are analysed with regard to the product management function in general and the positioning field for IT-products specifically: off-the-shelf (license), license plus service, project, and system service (incl. cloud computing).}, language = {en} } @article{SchmitzWeber2012, author = {Schmitz, Philipp and Weber, Martin}, title = {Buying and selling behavior of individual investors in option-like securities}, series = {Die Betriebswirtschaft : DBW}, volume = {72}, journal = {Die Betriebswirtschaft : DBW}, number = {5}, publisher = {Sch{\"a}ffer-Poeschel}, address = {Stuttgart}, issn = {0342-7064}, doi = {10.2139/ssrn.2055088}, pages = {409 -- 426}, year = {2012}, abstract = {We analyze the trading behavior of individual investors in option-like securities, namely bankissued warrants, and thus expand the growing literature of investors behavior to a new kind of securities. A unique data set from a large German discount broker gives us the opportunity to analyze the trading behavior of 1,454 investors, making 89,958 transactions in 6,724 warrants on 397 underlyings. In different logit regression, we make use of the facts that investors can speculate on rising and falling prices of the underlying with call and put warrants and that we also have information about the stock portfolios of the investors. We report several facts about the trading behavior of individual investors in warrants that are consistent with the literature on the behavior of individual investors in the stock market. The warrant investors buy calls and sell puts if the price of the underlying has decreased over the past trading days and they sell calls and buy puts if the price of the underlying has increased. That means, the investors follow negative feedback trading strategies in all four trading categories observed. In addition, we find strong evidence for the disposition effect for call as well as put warrants, which is reversed in December. The trading behavior is also influenced if the underlying reaches some exceptionally prices, e.g. highs, lows or the strike price. We show that hedging, as one natural candidate to buy puts, does not play an important role in the market for bank-issued warrants.}, language = {en} } @article{SchmitzWeber2007, author = {Schmitz, Philipp and Weber, Martin}, title = {Buying and selling behavior of individual investors in option-like securities}, pages = {1 -- 36}, year = {2007}, language = {en} } @inproceedings{FredebeulKrein2006, author = {Fredebeul-Krein, Markus}, title = {Developing competitive broadband markets: Lessons learnt from German and European regulatory approaches on broad-band access}, year = {2006}, abstract = {A key feature of future broadband markets will be diversity of access technologies, meaning that numerous technologies will be exploited for broadband communication. Various factors will affect the success of these future broadband markets, the regulatory policy being one amongst others. So far, a coherent regulatory approach does not exist as to broadband markets. First results of policies so far suggest that less sector-specific regulation is likely to occur. Instead, regulators must ensure that access to networks and services of potentially dominant providers in a relevant broadband market will satisfy requirements for openness and non-discrimination. In this environment the future challenge of regulationg broadband markets will be to set the right incentives for investment into new infrastructures. This paper examines whether there is a need for the regulation of future broadband access markets an if yes, what is the appropriate regulatory tool to do so. Thereby the focus is on the analysis of European broadband markets and the regulatory approaches applied. The first section provides a description of the characteristics of future broadband markets. The second section discusses possible bottlenecks on broadband markets an their regulatory implications. The third section will examine regulatory issues concerning access to broadband networks in more detail. This will be done by comparing the regulatory approaches of European countries and the results in terms of bradband penetration. The final section will give key recommendations for a regulatory strategy on brandband access markets.}, subject = {Telekommunikationsmarkt}, language = {en} } @inproceedings{FredebeulKrein2007, author = {Fredebeul-Krein, Markus}, title = {10 years of liberalised telecom markets in Germany: Assessing the degree of competition on the markets for voice telephony}, year = {2007}, abstract = {Market data for the German telecom market shows that Deutsche Telekom as the former incumbent is constantly loosing shares on all arkets for voice telephony: the market for local calls, the market for long-distance calls and the market for international calls. At the same time prices decline steadily with the latest trend being that operators offer voice services free of charge, the costs of which are covered by a monthly subscription charge. Against this background the paper examines the state of policy and regulatory reform in the telecommunications sector in Germany almost 10 years after the liberalisation of the fixed telecommunications market. Thereby the focus is on the analysis of the competitive conditions that have been established on the German market for voice telephony services. If these retail markets are competitive, there might be a need to remove remaining regulatory provisions. In the new environment of converging markets the future challenge of regulating fixed telecom markets might be to ensure that access to the network and/or services of a potentially dominant provider in a relevant market will satisfy requirements for openness and non-discrimination.}, subject = {Telekommunikationsmarkt}, language = {en} } @inproceedings{Wessling2007, author = {Weßling, Matthias}, title = {Leadership Perspectives: Research Findings, Theories, Practical Experiences}, year = {2007}, abstract = {Leadership Perspectives: Research Findings, Theories, Practical Experiences: Results of Leadership Research and exemplarily application cases show the perspectives and consequences for leadership practice and the following requirements for executives in future.}, subject = {Leadership}, language = {en} } @inproceedings{Wessling2007, author = {Weßling, Matthias}, title = {Motivation and Leadership - The Reiss-Profile of the 16 Basic Desires: Research results and managerial applications}, year = {2007}, abstract = {Recent Results of the scientific Reiss-Profile (16 basic desires) due to the concept of Prof. Dr. Steven Reiss (State University Ohio, U.S.A.), supplemented by the comparative analysis of empirical motivational profiles of european executives of various companies.}, subject = {Motivation}, language = {en} }