DISCRETE TIME HEDGING OF THE AMERICAN OPTION

In a complete financial market we consider the discrete time hedging of the American option with a convex payoff. It is well known that for the perfect hedging the writer of the option must trade continuously in time, which is impossible in practice. In reality, the writer hedges only at some discrete time instants. The perfect hedging requires the knowledge of the partial derivative of the value function of the American option in the underlying asset, the explicit form of which is unknown in most cases of practical importance. Several approximation methods have been developed for the calculation of the value function of the American option. We claim in this paper that having at hand any uniform approximation of the American option value function at equidistant discrete rebalancing times it is possible to construct a discrete time hedging portfolio, the value process of which uniformly approximates the value process of the continuous time perfect delta‐hedging portfolio. We are able to estimate the corresponding discrete time hedging error that leads to a complete justification of our hedging method for nonincreasing convex payoff functions including the important case of the American put. This method is essentially based on a new type square integral estimate for the derivative of an arbitrary convex function recently found by Shashiashvili.     

Accounting journals and the ABS quality ratings

This study aims to look behind the quality ratings for accounting journals, listed in the ABS Academic Journal Quality Guide (Kelly, Morris, Rowlinson and Harvey, 2009). Significant variations exist in the perceptions of journal quality across the six UK business schools that contribute ratings to the ABS guide, with the most optimistic perceptions tending to come from those schools whose ratings are more highly correlated with quality scores for critical and interpretive research, as reported in Lowe and Locke's (2005) article in Accounting, Organizations and Society (30:1, 81–98). Pessimistic perceptions are more likely to exist in those schools whose ratings are more highly correlated with Lowe & Locke's scores for functional and capital markets research paradigms. There are also notable variations in journal ratings across time. Given that perceptions vary so much across schools, paradigms and time, how much credence can be given to any single rating system for journal quality? This study concludes that if the ABS guide is to be used by university decision-makers or heads of school then the ABS ratings for any given year need to be treated with extreme caution and with an appropriate recognition of their intrinsic limitations.     

On the determinants of national saving: An extreme-bounds analysis

On the Determinants of Saving: An Extreme-Bounds Analysis. — We use extreme-bounds analysis to examine the reliability of estimates of various determinants of national saving. Results from the cross-sectional data are discouraging, for few of the standard determinants identified in the theoretical and empirical saving literature can pass robustness tests. However, our panel analysis is much more encouraging. We found agricultural share in total output, public saving, budget balance, and the current account balance are indeed robust. Furthermore, when we applied a modified form of sensitivity analysis, we found that seven variables are very robust. Generally, the most commonly specified determinants of saving provide limited guidance in understanding and predicting saving behavior.     

An organizational capability perspective on multi-unit franchising

Previous research on multi-unit franchising (MUF) has primarily focused on agency and transaction cost perspectives. The present study develops and tests an organizational capability (OC) model of the franchisor’s choice of MUF. According to the OC view, the franchisor gains a competitive advantage by exploration and exploitation of firm-specific resources and capabilities. We hypothesize that, if the franchisor expects to obtain a competitive advantage resulting from higher exploration and exploitation capabilities when using MUF as opposed to single-unit franchising, the franchisor will more likely choose MUF as a governance mode of the franchise system. Based on empirical data from the German and Swiss franchise sectors, the results of the regression analysis support these hypotheses. Our main contribution to the franchise literature is the development of an OC model of the franchisor’s choice of MUF that complements the existing organizational economics ?explanation of MUF.     

The Impact of Formal and Informal Distance on Gender Equality Approaches: The Case of a British MNC in Saudi Arabia

This study explores the forces that promote and hinder gender equality efforts of a multinational corporation (MNC) operating in the Middle East. Specifically, we draw from a case study to document the formal and informal pressures exerted on a British MNC operating in Saudi Arabia to better understand the multiple forces that influence gender equality approaches in the host country. Our findings suggest that while formal institutions such as the legal requirements and localization policies support gender equality, informal forces that are rooted in the cultural norms and traditions are formidable in hindering such efforts and in reinforcing the status quo. The insights generated from our study have the potential to inform public policy makers and organizational decision makers to locate the right policy tool to promote gender equality. © 2016 Wiley Periodicals, Inc.     

Does Shariah compliance make interest rate sensitivity of Islamic equities lower? An industry level analysis under different market states

This paper examines the sensitivity of the Dow Jones Islamic market index and its corresponding industry equity indices to changes in the level, slope and curvature of the U.S. term structure of interest rates over the period 1996–2015 using the quantile regression approach. The empirical results reveal that the Islamic stock market has a considerable negative exposure to interest rate risk, although a declining time pattern of interest rate sensitivity is observed. The unexpected changes in the level factor of the U.S. yield curve, closely linked to long-term interest rates, are identified as the most important interest rate factor in explaining the variability of Islamic equity returns. Furthermore, the interest rate exposure tends to be stronger during extreme bearish conditions in the stock market, possibly due to the greater pessimism and risk aversion under these market circumstances. It is also shown that Islamic equities are not different from their mainstream counterparts in terms of interest rate sensitivity, indicating that the Islamic stock market does not provide a cushion against interest rate risk.     

Testing interaction effects of the dimensions of market orientation on marketing program creativity

Despite the plethora of research on market orientation, our understanding of how different dimensions of market orientation interact with each other in generating new intelligence for marketing programs is limited. In this paper, we develop and test a model that examines the interaction effects of the three dimensions of market orientation—customer orientation, competitor orientation, and cross-functional integration—on generation of marketing program creativity, composed of novelty and meaningfulness dimensions. In empirically testing such effects, we illustrate how to use two-stage least squares (2SLS) estimation. We find significant positive interaction effects between customer orientation and competitor orientation and between competitor orientation and cross-functional integration in predicting marketing program novelty. We also find that competitor orientation and cross-functional integration significantly and positively interact with each other in improving marketing program meaningfulness. Our empirical results provide implications and directions for market orientation research.     

Innovation and corporate sustainability: An investigation into the process of change in the pharmaceuticals industry

Although there has been considerable research effort directed at refining the content of corporate environmental performance, e.g. corporate environmental reporting and accounting, there has been relatively little empirical investigation to date on the process of corporate eco‐change. This research reports on the quantitative and qualitative results of a survey of German and UK pharmaceuticals firms, which evaluated the significance of the various incentives, both intra‐firm and external to the organization, that have stimulated eco‐change. We find that, although the industry is one that has been characterized by voluntary agreements and proactive behaviour in the past, regulation still remains the main driver for sustainability improvements. New technology is the second most important driver. Stakeholder dialogue and inter‐firm cooperation were both revealed to be relatively weak forces for eco‐change. The study also tested the validity of the conventional neo‐classical economic world‐view of innovation in firms versus a more radical co‐evolutionary one. The former assumes that firms respond only to profit signals and do so efficiently, whereas the latter assumes that change is path dependent; i.e., the firms’ norms and routines and past experiences are influential. We find that, although the neo‐classical perspective stands up to our empirical investigation of eco‐innovation to some degree, the co‐evolutionary approach better captures the complexity of the corporate eco‐change process. Copyright © 2001 John Wiley & Sons, Ltd. and ERP Environment     

Impacts of the training and visit extension system on farmers' knowledge and adoption of technology: Evidence from Pakistan

This paper provides quantitative evidence on the impact of the Training and Visit (T&V) extension system in the irrigated Punjab of Pakistan. Three models are analyzed using limited dependent variable regressions: the impact of T&V on the number of extension contacts with farmers; the effect of extension contact on farmers' knowledge of wheat technology; and the impact of T&V on the adoption of improved wheat technology. The first model analyzes the impact of T&V on the quantity of extension contact and the latter two models analyze the effect on the quantity and quality of extension contact. It is concluded that T&V has increased the quantity but not the quality of extension contact and this, in turn, has increased farmers' knowledge and adoption of technology. However, the overall impacts have been small relative to those observed in a similar area in India.