Multilevel dual approach for pricing American style derivatives

In this article we propose a novel approach to reduce the computational complexity of the dual method for pricing American options. We consider a sequence of martingales that converges to a given target martingale and decompose the original dual representation into a sum of representations that correspond to different levels of approximation to the target martingale. By next replacing in each representation true conditional expectations with their Monte Carlo estimates, we arrive at what one may call a multilevel dual Monte Carlo algorithm. The analysis of this algorithm reveals that the computational complexity of getting the corresponding target upper bound, due to the target martingale, can be significantly reduced. In particular, it turns out that using our new approach, we may construct a multilevel version of the well-known nested Monte Carlo algorithm of Andersen and Broadie (Manag. Sci. 50:1222–1234, 2004) that is, regarding complexity, virtually equivalent to a non-nested algorithm. The performance of this multilevel algorithm is illustrated by a numerical example.     

Backtesting Value-at-Risk: A Duration-Based Approach

Financial risk model evaluation or backtesting is a key partof the internal model's approach to market risk management aslaid out by the Basle Committee on Banking Supervision. However,existing backtesting methods have relatively low power in realisticsmall sample settings. Our contribution is the exploration ofnew tools for backtesting based on the duration of days betweenthe violations of the Value-at-Risk. Our Monte Carlo resultsshow that in realistic situations, the new duration-based testshave considerably better power properties than the previouslysuggested tests.     

Gender and ethnic differences in factors that influence food intake

Abstract The objective of this research was to ascertain the gender-and ethnic-related factors that influence what one eats. This survey was conducted using a validated, pilot-tested questionnaire in 11 states and the District of Columbia, which were participating in the W-182 Western Regional Research project. The results indicated that the factors that influence what one eats differ by gender and ethnicity. Men were very much influenced by likes and dislikes, and by their spouse or significant other. Women were influenced by likes and dislikes, and health. Food likes/dislikes and concerns about health and weight were among the leading four factors for all ethnic groups. Food likes/dislikes were the top factor influencing what is eaten by 51% or more of Asians, Pacific Islanders, Caucasians and Hispanics. Concern about health was the top factor for 62% and 58%, respectively, of African Americans and Native Americans.     

Competing on the edge: Implications of network position for internationalizing small- and medium-sized enterprises

Three generic competitive strategies attributed to internationalizing SMEs of targeting niches, differentiating products and leveraging networks fail to adequately explain how SMEs win customers in other countries against both large and small competitors. This study distinguishes competitive strategy (how firms compete) from competitive advantage, and from competitive engagements where firms deploy their competitive advantages to win customers within business network relationships. By abductively reasoning from the competitive engagements entered into by the internationalizing SMEs from the Fleet Management Systems industry segment in New Zealand, we show that these firms often compete with foreign rivals by using their position on the edge of a business network to leverage information asymmetries across structural holes. We contribute by integrating this conception of internationalizing SME competitive strategy with the business network foundations of the Uppsala internationalization process model.     

An Empirical Study of Service Quality Implementation

The strategic importance of quality management has grown in importance in recent years. However, although the competitive implications of adhering to a quality agenda have been much alluded to within the literature, the evidence from a review of published studies suggests that service quality and strategy issues have been addressed as separate concerns by researchers. This study examines the components which facilitate the quality implementation process. The factor analysis of data emphasises the importance of ‘senior managerial commitment’ and ‘employee resourcefulness’ in quality implementation initiatives and offers support to the growing implementation initiatives and offers support to the growing literature arguing for a greater consideration of the human dimension in quality implementation programmes. It is proposed that further research needs to be carried out to examine mangerial attiudes towards the service quality implementation process and to assess some of the practical issues involved in introducing quality initiatives in hotel organisations.     

Impacts of intermediate trade on sector structure

Structural changes, i.e. long-run changes in the agriculture-manufacturing-services-structure, are a key property of growth and development processes with massive impacts on economy and society and are part of actual debates regarding policy in developing and developed economies. While traditional literature has attempted to explain structural changes by using autarkic models, recent literature has emphasised the importance of deriving theories of structural change using open economy settings. We elaborate on the impacts of intermediate trade on sector structure. In particular, we study how import of intermediate products, which is increasingly feasible due to improvements in transport technology and political integration, affects sector structure in a multi-sector growth model with capital accumulation. This topic has not been studied in the previous literature on structural change in open economies, despite the fact that intermediate imports and capital accumulation are central aspects of modern developing and developed economies. We show that the impacts of intermediate trade on sector structure depend on three factors: productivity gains from trade, specialisation in international trade and development stage. Depending on the constellation of these factors, intermediate trade may accelerate, decelerate or have no effect on structural change. Thus, the effects of intermediate trade may vary strongly across countries.     

Scoring More After Service Failures: Why Do Customers Overclaim?

ABSTRACT

More and more customers attempt to claim what they can, rather than what they are offered by the service firm after service failures. The present article empirically investigates the role of situational characteristics in triggering the intention to overclaim through a mediating process of customer's cognitive and emotional responses to the service failure. The model goes beyond predicting the likelihood of overclaiming behavior and offers some insights related to the magnitude or the extent of such claims. The results indicate that cognitive and affective drivers of overclaiming behavior have different impacts on the magnitude or the extent of such claims.     

Beyond Self-Regulation: Towards A Critique of Self-Regulation As A Control Strategy For Hazardous Activities*

After highlighting some of the key issues and positions in the debate around appropriate preventive regulation, the paper presents a number of observations directed at the proponents of greater self-regulation. These observations confront directly a number of familiar, but often unchallenged, arguments for self-regulation. More centrally we address claims concerning, the extent to which the chemicals industries have a good and improving ‘safety’ record; and whether the sector consists of companies both motivated and capable in the context of effective crisis and disaster management. Lastly, the paper sets out some ‘new directions’ for the nature and role of regulation in the effective prevention of crises. Thus the paper indicates a number of regulatory developments which are distinct from any shift towards greater self-regulation, but which would result in more effective crisis and disaster prevention in the UK chemicals industries and, indeed, beyond that specific sector.     

National policies within the CAP

Despite the existence of the Common Agricultural Policy within the EEC a considerable number of policies still remain under national control. Professor Britton reviews these, which include several commodities, most technical activities and land tenure policy, and the ‘grey areas’ which may become subject to Community control. He points to alternative policies which might reduce some of the tensions in the CAP and urges a more positive approach by national governments. Each government should ask if it would be willing for other governments to pursue the policies which it wishes to follow for its agricultural population.