Simulating Discount-Pricing Strategies for the GSM-Mobile Market

The article analyzes network effects on the German GSM mobile telephony market. The authors use an ACE-approach to examine how a new competitor can successfully gain ground in the market with a discount-pricing strategy. In particular they study the impact of several elements of a mobile phone contract like on-net-, landline- or off-net-fees on the competitor’s market share. It turns out that it is possible to successfully enter the market with a prepaid contract using a discount-pricing strategy where the single fees only marginally exceed the termination rates, which have to be transferred to foreign network operators. Accepted after one revision by Prof. Dr. Buhl. This article is also available in German in print and via http://www.wirtschaftsinformatik.de: Schade S, Frey T, Mahmoud N (2009) Simulation von Diskontpreis-Strategien im GSM-Mobilfunkmarkt. WIRTSCHAFTSINFORMATIK. doi: 10.1007/11576-009-0178-6.     

Stock returns and expected inflation: evidence from an asymmetric test specification

Previous studies that examined the relationship between stock returns and inflation have used a symmetric test specification, and have reported evidence of an inverse relation. We use an asymmetric model to re-examine this fundamental relationship between stock returns and inflation. We partition the study period into sub-samples of high and low inflation regimes. An inverse relation between stock returns and inflation forecasts is found during only low inflation periods, while a positive relation is detected through high inflation periods. In combination, results from both high and low inflation regimes suggest that stocks have delivered favorable inflation protection.      

The impact of incentives on CEO compensation and firm performance

A significant component of a management control system is the incentive mechanism and motivational underpinning of compensation contracts. Most executives are rewarded in the form of cash and company stock. Our data indicate that over 82.5 percent of the observations include a bonus pay to CEOs and an even larger percentage, about 94.5 percent, have stock option grants. Our analyses indicate that the means of market-based returns are significantly larger for companies with no stock option incentives. However, the accounting-based returns do not appear to be significantly influenced by stock-based rewards. (JEL: J30, G30, L21)     

Learning in experimental games

Summary Experimental games typically involve subjects playing the same game a number of times. In the absence of perfect rationality by all players, the subjects may use the behavior of their opponents in early rounds to learn about the extent of irrationality in the population they face. This makes the problem of finding the Bayes-Nash equilibrium of the experimental game much more complicated than finding the game-theoretic solution to the ideal game without irrationality. We propose and implement a computationally intensive algorithm for finding the equilibria of complicated games with irrationality via the minimization of an appropriate multi-variate function. We propose two hypotheses about how agents learn when playing experimental games. The first posits that they tend to learn about each opponent as they play it repeatedly, but do not learn about the population parameters through their observations of random opponents (myopic learning). The second posits that both types of learning take place (sequential learning). We introduce a computationally intensive sequential procedure to decide on the informational value of conducting additional experiments. With the help of that procedure, we decided after 12 experiments that our original model of irrationality was unsatisfactory for the purpose of discriminating between our two hypotheses. We changed our models, allowing for two different types of irrationality, reanalyzed the old data, and conducted 7 more experiments. The new model successfully discriminated between our two hypotheses about learning. After only 7 more experiments, our approximately optimal stopping rule led us to stop sampling and accept the model where both types of learning occur.We acknowledge the financial support from NSF grant #SES9011828 to the California Institute of Technology. We also acknowledge the able research assistance of Mark Fey, Lynell Jackson and Jeffrey Prisbrey in setting up the experiments, recruiting subjects and running the experiments. We acknowledge the help of the Jet Propulsion Laboratory and its staff members for giving us access to their Cray XMP/18, and subsequently their Cray YMP2E/116.     

Sustainable market orientation: a competitive strategic tool in an emerging economy context

The purpose of this research is to test the effect of sustainable market orientation (SMO) as a strategic tool on banks’ sustainable balanced firm performance (SBFP) in an emerging economy. The research data was collected via the survey approach through self-administered questionnaires to 445 bank employees. Exploratory Factor Analysis was employed to establish the dimensionality of the research constructs, whereas multiple linear regressions were utilised to test the research hypotheses. Results suggest that SMO is positively and significantly related to sustainable balanced performance of banks. The study confirms the SMO concept promulgated in prior studies. Employees’ opinions on bank Managers incorporating sustainability management variables into market orientation as a strategy are encouraged by scholars to engender SBFP. Strategic approaches of this kind leads to balance performance of organisations and the larger society which is central to all stakeholders. This study may be the initial quantitative investigation into SMO and SBFP in the strategic marketing literature.     

China's Healthcare Costing in Times of Crisis: Conflicts,Interactions, and Hidden Agendas

This paper presents a longitudinal interpretive case study on the development of healthcare costing in China over the period 2002 to 2015. Adopting a middle-range theory lens, the study explores dynamic interactions in the use of cost information among societal institutions and organizations. It reports the successful internalization of costing systems in public hospitals in Beijing, which supports the effectiveness of a hybrid steering mechanism combining both transactional and relational features; however, such successful internalization does not indicate the success of steering the lifeworld of institutions and organizations towards change. Notably, hospitals' responses to steering alter over time, from passive absorption to active manipulation, revealing how cost information may underpin hospital beliefs in marketization. At an institutional level, the paper provides empirical evidence for relational steering among societal institutions, where a reaction of ‘rebuttal’ is observed. It offers insights on how accounting can be a powerful tool in legitimizing such rebuttal, while keeping political considerations as hidden agendas. The findings suggest the importance of understanding lifeworld complexity at both societal and organizational levels, and cross-institutional collaboration in using accounting as a steering mechanism. The findings have important policy implications for public sector reform, both in China and worldwide.     

Bookmarks Recommendation in Bibsonomy using Community Detection

Several academic social networks have emerged to help researchers who need to search for documents relevant to their interests. The recommendation has been adopted in many websites to suggest relevant documents to users according to their profiles. However, many academic social networks and digital libraries still lack recommendations. In this paper, we propose a new document recommendation approach for the academic social bookmarking website: Bibsonomy. In our method, we use a community detection technique to identify related users. Then, for each target user, the recommended documents are selected from their learning communities. Experimental results show that the proposed method performs better than state-of-the-art recommendation methods.     

Transition economies in the Middle East: the Syrian experience

There have been no in-depth studies of the post-socialist transition in the Middle East. Syria’s experience is a useful one to explore given its historically important role in the region and its distinctive characteristics. The Syrian economic transition, from the early 1990s to 2011, was in two phases: an incremental liberalisation phase and a transition to a social market economy phase. During both phases, Syrian policymakers showed a preference for a gradualist approach to economic transition, rather than a big-bang approach. This was facilitated by oil revenues and subsidies from the Gulf States. The Syrian experience therefore has its own distinct characteristics, as well as elements in common with the transitions in other post-socialist economies.