Decision support for risks managers in the case of deliberate food contamination: The dairy industry as an example

Dairy farms were identified, which can be included in a contingency plan set up to prevent or mitigate the consequences of deliberate contamination of a food supply chain. The deliberate introduction of a contamination into the supply chain of milk was simulated in a scenario where milk producers serve as the entry sources and consumers of milk represent the target to be affected by the contamination. It is shown that the entry sources have an impact on the damage caused, i.e. in terms of the number of consumers reached. A contingency plan is provided that contains a list of entry sources ranked according to their impact on the damage to consumers. To generate this list, a computer program was developed that simulates the impact of the contaminations on consumers via the trade of contaminated milk. Possible variations in the trade links between milk producers, dairies and consumers as well as between dairies are considered. It is investigated how these trade links alter the generated list of entry sources.The results indicate that, regardless of the actual milk trade flow, control measures should be introduced on 39% of the milk producers in order to minimize the damage. The identification of suitable entry sources may help risk managers to focus on these farms in a contingency plan that improves the sensitivity of control activities related to deliberate contamination.     

The EO in OBM

Abstract

Olson, Laraway, and Austin (2001) propose an increased emphasis on the establishing operation in organizational behavior management. Their proposal raises interesting questions about theory, science, and practice. (1) What should be the role of theory in behavior analysis? (2) Should we try to find problems that match our solutions or vice versa ? (3) What is the relative importance of the establishing operation and the performance-management contingency in managing organizational behavior? (4) Should theory and basic research be more informed by the issues raised in applied settings?     

Public nudity on cell phones: Managing conflict in crisis situations

Analyzing news coverage to recount a fast-moving, dramatic marketing PR incident that occurred in South Korea, the contingency theory of conflict management and crisis management strategies are integrated to examine how crisis is communicated and managed in a very short period of time. Several types of strategies were utilized by contending parties through the various stages of the crisis life cycle. We found evidence for a new contingent variable that should be added in the matrix of contingent factors--the importance of Internet community and Netizens as organized and influential public. Netizens played an important role throughout the crisis period in changing the organization's stance from advocacy to accommodation.     

Maneuvering through Hostile Environments: How Firms Leverage Product and Process Innovativeness

Is focusing on innovativeness the appropriate organizational response in hostile environments? This study addresses four distinct forms of hostile environments: market decline, restrictiveness, competition, and resource scarcity. The research draws on contingency theory to explain how these forms of hostility affect product innovativeness, process innovativeness, and firm performance. While the extant literature has investigated the effects of hostile environments on performance, little has been done to distinguish between different forms of hostility and, in turn, their potential effect on product and process innovativeness. We argue that investments in product and process innovativeness are either fostered or hindered, contingent on the form of hostile pressures from the external operating environment. These firm responses should in turn suppress the negative effects of hostility on performance. A survey using newly developed measurement scales for hostile environments was used to collect data from 148 small and medium‐sized manufacturing plants. The results provide evidence that generally supports our hypotheses. More specifically, the direct effects of the four forms of hostile environments impact product and process innovativeness differently. Likewise, the suppression and consistent mediation effects of product and process innovativeness differ depending upon the type of hostile environment, suggesting that manufacturers consider applying these capabilities contingent upon the type of hostile climate they face. Therefore, to understand how firms leverage product and process innovativeness, hostile environments are best differentiated into categories rather than being aggregated.     

Improving Path Trimming in a Network Algorithm for Fisher's Exact Test in Two-way Contingency Tables

This article provides an improvement of the network algorithm for calculating the exact p value of the generalized Fisher's exact test in two-way contingency tables. We give a new exact upper bound and an approximate upper bound for the maximization problems encountered in the network algorithm. The approximate bound has some very desirable computational properties and the meaning is elucidated from a viewpoint of differential geometry. Our proposed procedure performs well regardless of the pattern of marginal totals of data.     

Three centuries of categorical data analysis: Log-linear models and maximum likelihood estimation

The common view of the history of contingency tables is that it begins in 1900 with the work of Pearson and Yule, but in fact it extends back at least into the 19th century. Moreover, it remains an active area of research today. In this paper we give an overview of this history focussing on the development of log-linear models and their estimation via the method of maximum likelihood. Roy played a crucial role in this development with two papers co-authored with his students, Mitra and Marvin Kastenbaum, at roughly the mid-point temporally in this development. Then we describe a problem that eluded Roy and his students, that of the implications of sampling zeros for the existence of maximum likelihood estimates for log-linear models. Understanding the problem of non-existence is crucial to the analysis of large sparse contingency tables. We introduce some relevant results from the application of algebraic geometry to the study of this statistical problem.     

On a multivariate log-gamma distribution and the use of the distribution in the Bayesian analysis

In this article, we propose a new generalized multivariate log-gamma distribution. We consider the usage of the proposed multivariate distribution as the prior distribution in the Bayesian analysis. The generalized multivariate log-gamma distribution allows for the inclusion of prior knowledge on correlations between model parameters when likelihood is not in the form of a normal distribution. Use of the proposed distribution in the Bayesian analysis of log-linear models is also discussed.     

后马克思主义视域中的自发性概念(下)——论拉克劳与莫菲对罗莎·卢森堡的解读

在列宁主义和斯大林主义视野之下,罗莎·卢森堡的自发性概念被定性为客观主义的宿命论而遭到清剿式的批判。拉克劳与莫菲彻底扭转了这种高压指摘的一边倒态势,把长期以来被视为罗莎·卢森堡理论污点的自发性概念拨正为一种极具创造性的积极理论资源并作出了别具一格的解读。同宿命论指控将自发性纳入坚硬的必然性的做法截然相反,拉克劳与莫菲把罗莎·卢森堡的自发性概念当作寻觅偶然性的“黄金领地”。但是,他们寻求的偶然性,不是作为革命运动之起因和必然性之表现的辩证偶然性,而是在反资本主义的政治斗争中主体身份建构时的偶然性。拉克劳与莫菲认为,在罗莎·卢森堡那里,作为政治统一性的建构机制的偶然性逻辑受到多元决定过程之外的必然性逻辑的严格限制,从而导致了罗莎·卢森堡的两难困境和“双重空场”。只有勇于面对偶然性并实际地承认偶然性逻辑在形构政治一致性的作用,才能走出罗莎·卢森堡式的困境,才能填补失效的必然性退场后形成的空场,而这正是拉克劳与莫菲的后马克思主义的理论诉求。     

Internal and External Integration for Product Development: The Contingency Effects of Uncertainty,Equivocality, and Platform Strategy

Effective product development requires firms to unify internal and external participants. As companies attempt to create this integrated environment, two important questions emerge. Does a high level of internal integration lead to a higher level of external integration? In the context of product development, this study considers whether internal integration in the form of concurrent engineering practices affects the level of external integration as manifested by customer integration, supplier product integration, and supplier process integration. External integration, in turn, may influence competitive capabilities, namely product innovation performance and quality performance. Second, using contingency theory, do certain contextual variables moderate the linkages between integration strategy (external and internal) and performance? Specifically, this study considers whether uncertainty, equivocality, and platform development strategy change the relationships among internal integration, external integration, and competitive capabilities. Data collected from 244 manufacturing firms across several industries were used to test these research questions. The results indicate that both internal and external integration positively influence product innovation and quality and ultimately, profitability. With respect to contingency effects, the results indicate that equivocality moderates the relationships between integration and performance.     

Nonparametric analysis of ordinal categorical response data with factorial structure

A simple nonparametric method of analysis for contingency tables with an ordinal response and factorial treatment structure is described. The method involves a partition of Pearson's X ²_P-statistic by using orthogonal polynomials so that location and dispersion effects are estimated for each level of the explanatory variable. Analyses of variance are then performed on these effects to determine the important factors. The methods are applied to two examples, where consumers rate their liking for a product on an ordered categorical scale, one of which highlights the need to look at dispersion as well as location effects.