A bootstrap approach to Pluto's origin

The solar nebula theory hypothesizes that planets are formed from an accretion disk of material that, over time, condenses into dust, small planetesimals, and that the planets should have, on average, coplanar, nearly circular orbits. If the orbit of Pluto has a different origin to the other planets in the solar system, then there will be tremendous repercussions on modelling the spacecrafts for a mission to Pluto. We test here the nebula theory for Pluto, using both parametric and non-parametric methods. We first develop asymptotic distributions of extrinsic means on a manifold, and then derive bootstrap and large sample distributions of the sample mean direction. Our parametric and non-parametric analyses provide very strong evidence that the solar nebula theory does not hold for Pluto.     

The Influence of ISO 9000 Certification on Process Compliance

This article examines the influence of ISO 9000 certification on plant‐level process compliance, which arguably is its first‐order, targeted performance dimension. The empirical setting is the medical device manufacturing industry. Process compliance is measured through Food and Drug Administration inspections of manufacturing plants. We control for several observable factors that possibly affect process compliance by matching certified plants with non‐certified plants. Using longitudinal data, we find plants that obtained certification in the earlier diffusion period (early‐certified plants) tend to have significantly better process compliance than a matched, non‐certified control group of plants. The compliance difference between early‐certified plants and their matched control group is greater than the compliance difference between late‐certified plants and their matched control group. We also find deterioration in process compliance over time after certification. Because we capture longitudinally the first‐order effects of ISO 9000 on process compliance, this study provides a useful baseline for assessing causality in ISO 9000‐performance linkages. Also, we explain, in part, the inconsistencies observed in related ISO 9000 literature examining the performance effects of certification. Further, this research offers managerial insights on the dynamics of certification and process compliance with time, and highlights the need for continued vigilance post certification.     

Rabbi Engagement with the Peace Process in the Middle East*

Objectives. Support for Israel has been a hallmark issue of the Jewish lobby in American politics. But what do Jewish religious leaders think about U.S. policy toward Israel and the peace process, and how often do they address these issues? Methods. Using a sample of more than 400 rabbis drawn from the four major movements of American Judaism in the fall of 2000, we investigate rabbi views of and speech about foreign affairs, especially about Israel. Results. Contrary to conventional wisdom, we find considerable diversity in opinion among rabbis (if not public speech), particularly on issues concerning Israel and the peace process. Conclusions. We conclude that the Jewish community—really, several communities organized by movement—is hearing a diversity of opinions about the peace process. We argue that reference group theory and movement socialization help explain this diversity.     

Dr. Carver's odyssey

Boards That Make a Difference: A New Design for Leadership in Nonprofit and Public Organizations (Third Edition), by John Carver. San Francisco: Jossey‐Bass, 2006. 448 pp., $36.00 cloth.     

Predicting effective customer lifetime: an application of survival analysis for telecommunication industry

Abstract

Innovation helps brands in making customer’s lives better and more meaningful. The purpose of brand management is to create an impact that makes differences to its customers. This study describes certain demographic factors that usually impact the continuing probability of customers and thereby can help management in identifying the effective lifetime of customers towards a particular offering. For this purpose the technique of Survival Analysis has been used and the data has been collected from customers of telecommunication industries. Results depicted that the attitudinal aspect of customers for continuing a particular product is significantly impacted by the factors under consideration.     

Emerging paradoxes in executive leadership: A theoretical interpretation of the tensions between corruption and virtuous values

The recent mini scandal surrounding questionable on-line postings of John Mackey, the founder and CEO of Whole Foods Market Inc., raises once again ethical challenges related to contemporary business leadership. Given his visible commitment to environmentally sound strategies and other responsible business practices, Mackey’s actions epitomize the irony and paradox that can surround executive leadership ethics. While this essay acknowledges the potential role of stricter legal constraints, punishments for offenders, decentralized governance systems, and rationalized structures that help prohibit power abuse, it views such rationalistic considerations alone to be inadequate. Rather, the authors suggest that the promotion of authentic virtuousness is an often overlooked yet indispensable part of any meaningful long term ethical leadership process.     

Supply Networks as a Complex Adaptive System: Toward Simulation‐Based Theory Building on Evolutionary Decision Making

In this article, we examine how the firms embedded in supply networks engage in decision making over time. The supply networks as a complex adaptive system are simulated using cellular automata (CA) through a dynamic evolution of cooperation (i.e., “voice” decision) and defection (i.e., “exit” decision) among supply network agents (i.e., firms). Simple local rules of interaction among firms generate complex patterns of cooperation and defection decisions in the supply network. The incentive schemes underlying decision making are derived through different configurations of the payoff‐matrix based on the game theory argument. The prisoner's dilemma game allows capturing the localized decision‐making process by rational agents, and the CA model allows the self‐organizing outcome to emerge. By observing the evolution of decision making by cooperating and defecting agents, we offer testable propositions regarding relationship development and distributed nature of governance mechanisms for managing supply networks.     

A flexible class of models for data arising from a ‘thorough QT/QTc study’

The standard methods for analyzing data arising from a ‘thorough QT/QTc study’ are based on multivariate normal models with common variance structure for both drug and placebo. Such modeling assumptions may be violated and when the sample sizes are small, the statistical inference can be sensitive to such stringent assumptions. This article proposes a flexible class of parametric models to address the above‐mentioned limitations of the currently used models. A Bayesian methodology is used for data analysis and models are compared using the deviance information criteria. Superior performance of the proposed models over the current models is illustrated through a real dataset obtained from a GlaxoSmithKline (GSK) conducted ‘thorough QT/QTc study’. Copyright © 2010 John Wiley & Sons, Ltd.