Binomial Option Pricing Biases and Inconsistent Implied Volatilities

We evaluate the binomial option pricing methodology (OPM) by examining simulated portfolio strategies. A key aspect of our study involves sampling from the empirical distribution of observed equity returns. Using a Monte Carlo simulation, we generate equity prices under known volatility and return parameters. We price American–style put options on the equity and evaluate the risk–adjusted performance of various strategies that require writing put options with different maturities and moneyness characteristics. The performance of these strategies is compared to an alternative strategy of investing in the underlying equity. The relative performance of the strategies allows us to identify biases in the binomial OPM leading to the well–known volatility smile . By adjusting option prices so as to rule out dominated option strategies in a mean–variance context, we are able to reduce the pricing errors of the OPM with respect to option prices obtained from the LIFFE. Our results suggest that a simple recalibration of inputs may improve binomial OPM performance.     

Entry in a Dynamic Model with Equilibrium Price Dispersion with an Application to the Market for Long-Distance Telephone Services

Models of entry based on the traditional models of oligopoly do not allow for price dispersions on homogenous products. Yet, such price dispersions do exist for homogenous products, and a firm does not lose its entire market share when it fails to charge the lowest price. Existing models of equilibrium price dispersion are not designed to analyze entry in a dynamic framework. A dynamic model is developed that allows an analysis of the effects of entry into a previously monopolized market. Despite asymmetric initial shares, the market shares of equally efficient firms tend to equalize over time. An application is the market for long‐distance telephone services following the divestiture of the bell operating companies from AT&T.     

A critical examination of team-teaching of health care administration courses: student, faculty, and administration perspective

There are several teaching techniques adopted by faculty in order to provide information to students in the most effective manner. One of the relatively new teaching techniques is known as team-teaching. It has been observed that over the recent years this form of teaching has been gaining increasing interest and popularity among academicians. Nevertheless, there seems to be a great deal of confusion associated with team-teaching format. This paper attempts to clarify the various definitions and concerns that are associated with this form of teaching. The pros and cons of this form of teaching are discussed in detail.     

On a class of correlated queueing problems

This paper deals with a steady state behaviour of a discrete time, single channel, first come first served, finite space queueing problem. It is assumed that the departure probabilities depend on the queue length and that the departure at two consecutive time marks are correlated. The arrivals at two consecutive time marks are statistically independendent. However, the arrival probabilities are assumed to depend on the queue length. A few particular cases have also been discussed.     

Insecure Advantage? Markets for Technology and the Value of Resources for Entrepreneurial Ventures

We study how the impact of capabilities for performance is contingent upon the environment. Using a novel dataset of information security start‐ups, we study how markets for technology change the relative impact of technology and marketing capabilities on performance. Since internal technical effort enables firms to generate technology inputs instead of acquiring them from the market (substitute), a greater supply of technology diminishes the importance of technical ability as a source of competitive advantage. Moreover, since marketing capability complements technology inputs, a greater supply of technology enhances the impact of marketing capability on performance. Copyright © 2011 John Wiley & Sons, Ltd.     

Let's reach all of the market for health administration education: design, development, and delivery issues in distance delivery

Web-based distance learning is an up and coming form of education. Web-based education delivered via a Web browser through the Internet has been found to be less expensive, more efficient, and sometimes more effective than classroom training. In the distance learning environment, the traditional "lecture and chalkboard" classroom pedagogy is completely absent. The virtual classroom becomes an "active learning" environment in which students, while utilizing technology, are able to discuss health administration concepts, analyze cases, work exercises, and discuss and share these interactively with both the instructor and fellow classmates. This method of Health Administration Education encourages students to learn from each other and promotes the open exchange of ideas and experiences. It does not require working students to put their careers on hold while they continue their studies. In this paper, we explore the opportunities and challenges of delivering web-based Health Administration courses via the Internet. Included is a discussion of the design, development, and delivery of a distance learning, web-based Health Administration Education system.     

Geographic Concentration in Indian Manufacturing and Service Industries: Evidence from 1998 to 2013

This paper uses a comprehensive new data source to document basic facts about geographic concentration among industries in India from 1998 to 2013. Unlike previous studies, our data allow us to accurately measure industrial concentration at the district level and cover manufacturing and services, as well as the formal and informal sectors. Our most striking finding is that average levels of industrial concentration fell dramatically between 1998 and 2013, driven by steep reductions in capital‐intensive manufacturing industries. We provide suggestive evidence that this increasing dispersion may be due to improvements in interregional transportation coupled with inefficient land management policies and limited labor mobility.     

Twenty-five years of business systems research and lessons for international business studies

Since 1992, the national business systems (NBS) approach has been increasingly used to analyse not only firm characteristics, structures and strategies within NBS, but also the nature of international business and its interactions with both national and transnational institutions. In reviewing 25 years of NBS literature, we heed calls in IB journals urging researchers to use NBS notions and findings in IB research. Our systematic review of 96 articles analyses the patterns and contributions of NBS literature, revealing four thematic junctures: (1) comparative business systems, (2) firm internationalisation and the management/organisation inside MNCs, (3) the role of internationalisation in the development of organisational capabilities and innovation and (4) the emergence of transnational communities in and across firms and societies. Themes are described in terms of (a) the research questions (RQ) they focus on, (b) how NBS approach investigates the RQ and what are the major findings, (c) how IB frames and approaches the same RQ, (d) how does the NBS approach extend the perspectives of IB and (e) what are the problems faced by NBS in terms of developing further insights into the RQ. Our review contributes to the recent endeavour of IB research to institutionalism, encouraging a productive dialogue between IB and NBS research.     

Fledgling firms offer hope on health costs

Julia Adler-Milstein and Ashish Jha Regional health information organizations--RHIOs--are springing up in the United States to meet a vital need: to connect the nation's disparate patient-health information systems. If RHIOs can find a viable business model, they stand to improve the quality and decrease the cost of U.S. health care dramatically.     

An application of the generalized Poisson difference distribution to the Bayesian modelling of football scores

The analysis of sports data, in particular football match outcomes, has always produced an immense interest among the statisticians. In this paper, we adopt the generalized Poisson difference distribution (GPDD) to model the goal difference of football matches. We discuss the advantages of the proposed model over the Poisson difference (PD) model, which was also used for the same purpose. The GPDD model, like the PD model, is based on the goal difference in each game that allows us to account for the correlation without explicitly modelling it. The main advantage of the GPDD model is its flexibility in the tails by considering shorter as well as longer tails than the PD distribution. We carry out the analysis in a Bayesian framework in order to incorporate external information, such as historical knowledge or data, through the prior distributions. We model both the mean and the variance of the goal difference and show that such a model performs considerably better than a model with a fixed variance. Finally, the proposed model is fitted to the 2012–2013 Italian Serie A football data, and various model diagnostics are carried out to evaluate the performance of the model.