Bounding the inefficiency of equilibria in nonatomic congestion games

Equilibria in noncooperative games are typically inefficient, as illustrated by the Prisoner's Dilemma. In this paper, we quantify this inefficiency by comparing the payoffs of equilibria to the payoffs of a “best possible” outcome. We study a nonatomic version of the congestion games defined by Rosenthal [Int. J. Game Theory 2 (1973) 65], and identify games in which equilibria are approximately optimal in the sense that no other outcome achieves a significantly larger total payoff to the players—games in which optimization by individuals approximately optimizes the social good, in spite of the lack of coordination between players. Our results extend previous work on traffic routing games.     

Formative versus reflective measurement models: Two applications of formative measurement

This paper presents a framework that helps researchers to design and validate both formative and reflective measurement models. The framework draws from the existing literature and includes both theoretical and empirical considerations. Two important examples, one from international business and one from marketing, illustrate the use of the framework. Both examples concern constructs that are fundamental to theory-building in these disciplines, and constructs that most scholars measure reflectively. In contrast, applying the framework suggests that a formative measurement model may be more appropriate. These results reinforce the need for all researchers to justify, both theoretically and empirically, their choice of measurement model. Use of an incorrect measurement model undermines the content validity of constructs, misrepresents the structural relationships between them, and ultimately lowers the usefulness of management theories for business researchers and practitioners. The main contribution of this paper is to question the unthinking assumption of reflective measurement seen in much of the business literature.     

Culture and evaluation of service quality — a study of the service quality gaps in a Taiwanese setting

This research is built upon the work of Parasuraman, Zeithaml and Berry (1985) by exploring the service quality gap within a Taiwanese hospitality setting and reports the findings from 164 interviews among hotel managers, service staff, and hotel guests. One motive for the research was whether concepts derived from an American‐Euro‐centric conceptualisation of service relationships was transferable to another cultural setting. It was found that the influence of national, ethnic culture on perception of service is limited, but the factor of kuan‐hsi (personal relationship) and mien‐tsu (face) had some role to play in guest‐staff relationships. However, it is concluded that the globalisation of hotel corporate modes of operation have more influence in shaping expectations and thus the ServQual model has validity in such settings.     

Cellular clouds

This paper progresses an analysis of what it means to be a cellular network operator and what form the ownership and control of future cellular networks may take. Alternative modes of ownership may allow for the creation of more flexible cellular networking environments in which competition for packages of resources, that is, the licenced spectrum, the RAN and core network, ensures that the most efficient and innovative architectures, services and applications are delivered to the consumer. This paper develops the concept of the Cellular Network Cloud and Utility Cellular Networking as a means to explore the possibilities for such revolution in the way in which cellular networks are owned and operated. Changes to current industry practices which would help to meet the objectives of more flexible and competitive network ownership and control are proposed.     

Supporting ALARP decision making by cost benefit analysis and multiattribute utility theory

Current guidance in the UK and elsewhere indicate upper and target risk limits for the operation of nuclear plant in terms of individual risk per annum. ‘As low as reasonably practicable’ (ALARP) arguments are used to justify the acceptance or rejection of policies that lead to risk changes between these limits. The suitability of cost‐benefit analysis (CBA) and multiattribute utility theory (MAUT) are assessed for performing ALARP (‘as low as reasonably possible’) assessments, in particular within the nuclear industry. Four problems stand out in current CBA applications to ALARP, concerning the determination of prices of safety gains or detriments, the valuation of group and individual risk, calculations using ‘disproportionality’, and the use of discounting to trade‐off risks through time. This last point has received less attention in the past but is important because of the growing interest in risk‐informed regulation in which policies extend over several timeframes and distribute the risk unevenly over these, or in policies that lead to a nonuniform risk within a single timeframe (such as maintenance policies). The problems associated with giving quantitative support to such decisions are discussed. It is argued that multiattribute utility methods (MAUT) provide an alternative methodology to CBA which enable the four problems described above to be addressed in a more satisfactory way. Through sensitivity analysis MAUT can address the perceptions of all stakeholder groups, facilitating constructive discussion and elucidating the key points of disagreement. It is also argued that by being explicitly subjective it provides an open, auditable and clear analysis in contrast to the illusory objectivity of CBA. CBA seeks to justify a decision by using a common basis for weights (prices), while MAUT recognizes that different parties may want to give different valuations. It then allows the analyst to explore the ways in which different parties might (or might not) come to the same conclusion even when weighting items differently.     

Die sterblichkeit der versicherten in schwedischen lebensversicherungsgesellschaften während der Zeit vom 1. Juli 1918–30. Juni 1919

Abstract

Die grossen Influenzaepidemien von 1918 und den folgenden Jahren haben aus natürlichen Gründen das Interesse der Lebensversicherungsstatistiker der ganzen Welt auf sich gelenkt. Statistische Ergebnisse über den Einfluss dieser Epidemien auf die Sterblichkeit von Lebensversicherten findet man so z. B. in folgenden Abhandlungen: Dr. A. WINTER, De sterfte in de laatste jaren. Het Verzekerings-Archief, Jaargang II, No. 2; JAMES D. CRAIG and LOUIS I. DUBLIN, The influenza Epidemic of 1918. Transactions of the Actuarial Society of America, vol. 20, No. 61; R. J. BACKLUND, Dödligheten i spanska sjukan i Kaleva 1918–1920. Nordisk Försäkringstidskrift, Årg. I, n:r 4.     

Technology Management in a Mature Firm: Structuration Theory and the Innovation Process

Most innovation studies focus on the activities or characteristics of individuals (agency) or on organizational attributes such as size and formalization (structure). In attempting to reconcile this agency-structure dichotomy we draw on structuration theory to examine the innovation process in detail. Structural properties (signification, domination and legitimation) are constantly reproduced from social interaction (communication, power and sanctions) by means of the modalities (interpretative schemes, facilities and norms) drawn on by knowledgeable, reflexive actors. This framework is utilized to examine the case of a mature manufacturing company in which managers and engineers were attempting to access new technologies. The data were acquired by means of a 6-year, on-going study which began in 1992 and which we suggest is essential for a thorough understanding of the innovation process.