The Effect of Product Variety and Inventory Levels on Retail Store Sales: A Longitudinal Study

We examine the effects of product variety and inventory levels on store sales. Using 4 years of data from stores of a large retailer, we show that increases in product variety and inventory levels are both associated with higher sales. We also show that increasing product variety and inventory levels has an indirect negative effect on store sales through their impact on phantom products—products that are physically present at the store, but only in storage areas where customers cannot find or purchase them. Our study highlights a consequence of increased product variety and inventory levels that has previously been overlooked in studies of retail product variety and inventory management. It also quantifies the impact of phantom products on store sales. In addition, our study provides empirical evidence to support earlier claims that higher product variety and inventory levels lead to an increase in defect rate. We discuss the implications of our findings for retail inventory and assortment planning and for the design of retail stores.     

The challenge of board composition: Effects of board resource variety and faultlines on the degree of a firm’s international activity

This study explores the relationship between diversity in board composition and the degree of a firm's international activity. Specifically, we posit that board resource variety has a positive relationship with the international activity of the firm and that the strength of board faultlines moderates this relationship. Using data collected from Spanish public companies over the period 2005 to 2010, our analysis shows strong support for our hypotheses. Our work contributes to the literature on board's diversity by demonstrating that board resource variety should be captured by considering “the director profile” rather than any single attribute and that this type of variety can engender subgroups that weakens its benefits. Therefore, our results have implications for the strategic management challenge international firms face when they put together their boards. A corporate board needs to structure itself in such a way as to benefit from the wealth of the variety of its resources, but without succumbing to the risks posed by conflicts between subgroups arising from the presence of faultlines.     

Understanding top managers’ careers: How does career variety impact tenure on the board?

Career variety has recently received attention in management literature in general, and top management literature in particular. While existing publications have predominantly linked career variety to individual adaptability, agility or competences, this paper focuses on the relationship between top managers’ career variety and their tenure on the board. We rely on the boundaryless career approach and argue that there is a negative relationship between career variety and board tenure. Drawing on a sample of executive directors in UK FT 100 firms, we provide empirical evidence that increased career variety leads to shorter tenure on the board. We also reveal that this relationship is further strengthened with international educational experience. In addition, we show that in-house work experience mitigates the negative association between career variety and board tenure. We contribute to the literature on top managers’ careers by unravelling the consequences that career variety during early and mid-stages of a career has on tenure on the board – and hence on career stability in later stages of a career.     

Examining the cross-level relationship between shared leadership and learning in teams: Evidence from China

The current study extends the literature on shared leadership by exploring the questions of whether, how, and when shared leadership makes an impact on team and individual learning behaviors. Specifically, the current research proposed that shared leadership has a positive impact on both team and individual learning and this impact was realized through the mediating role of team psychological safety. Furthermore, the study introduces job variety as a potential moderator in the relationships between shared leadership on team and individual learning behaviors through team psychological safety, such that the indirect effects are more positive when team members perceived high job variety. Using 263 members from 50 teams in China, the hypotheses were largely supported. Theoretical contributions, practical implications and future research directions are discussed.     

Closing the Loop: An Empirical Analysis of the Dynamic Decisions Affecting Product Variety

Product variety decisions have become a key issue in managing new product development and innovation. The marketing literature highlights how product variety influences consumer demand. The operations and supply chain management literature discusses the impact of product variety on production and operational costs. However, very little has been found about how these past performance outcomes may influence present variety decisions. We consider product variety and performance outcomes in a dynamic decision loop by testing the forward impacts of product variety on demand and cost, as well as the reverse influences of past performance on present product variety decisions. Using archival data from the distribution network of a U.S.‐based soft drink bottler, we develop a balanced panel dataset of 3,666 observations over three years containing product variety, cost, and demand data. Our results suggest that both past demand and past cost outcomes may influence present variety decisions, with the demand impact occurring more rapidly than the impact of cost. Moreover, we investigate curvilinear impacts of product variety on the performance measures and find that product variety influences both demand and cost performance at diminishing marginal rates. From a theoretical perspective, our study better models the interplay between product variety and performance outcomes, while from a professional perspective, we help supply chain managers to better plan for the outcomes of their product variety decisions.     

The effect of product variety on purchase probability

Regarding the effect of product variety on purchase probability, there exist findings which demonstrate a positive effect of variety for small assortments and a negative effect of variety for large assortments. Despite these results, little evidence exists about the causal mechanism of this effect. We conduct a field study among German consumer electronics customers to investigate the previously proposed constructs of anticipated product utility, anticipated regret and evaluation costs. The results suggest that anticipated regret and evaluation costs play a powerful role in explaining the negative link between variety and purchase probability for high variety assortments. Anticipated product utility on the other hand serves to explain part of the positive causality for low variety assortments. The results obtained give rise to recommendations for the planning of assortments.

MANAGING PRODUCT VARIETY: AN INTEGRATIVE REVIEW AND RESEARCH DIRECTIONS

Variety management has emerged as a crucial dimension of successful business practice. In this paper, I first provide a framework for managerial decisions about variety. Variety‐creation decisions determine the amount, type, and timing of end‐product variety, while variety‐implementation decisions focus on the design and operation of internal processes and a supply chain to support a firm's variety‐creation strategy. I organize variety‐related decisions into four key decision themes in variety creation: 1) dimensions of variety, 2) product architecture, 3) degree of customization, and 4) timing; and three key decision themes in variety implementation: 1) process capabilities, 2) points of variegation, and 3) day‐to‐day decisions. I describe each theme and review the relevant literature on each theme, with a focus on research that provides insight to problems faced in practice. Finally, I identify untapped avenues for future research that would be of value to the practicing manager, paying special attention to interdependencies among decision themes.     

A Competitive Model of Customization with Lead‐Time Effects

In this article, we study the competitive interactions between a firm producing standard products and a firm producing custom products. Consumers with heterogeneous preferences choose between n standard products, which may not meet their preferences exactly but are available immediately, and a custom product, available only after a certain lead time l. Standard products incur a variety cost that increases with n and custom products incur a lead time cost that is decreasing in the lead time l. We consider a two‐stage game wherein at stage 1, the standard product firm chooses the variety and the custom firm chooses the lead time and then both firms set prices simultaneously. We characterize the subgame‐perfect Nash equilibrium of the game. We find that both firms can coexist in equilibrium, either sharing the market as local monopolists or in a price‐competitive mode. The standard product firm may offer significant or minimal variety depending on the equilibrium outcome. We provide several interesting insights on the variety, lead time, and prices of the products offered and on the impact of problem parameters on the equilibrium outcomes. For instance, we show that the profit margin and price of the custom product are likely to be higher than that of standard products in equilibrium under certain conditions. Also, custom firms are more likely to survive and succeed in product markets with larger potential market sizes. Another interesting insight is that increased consumer sensitivity to product fit may result in lower lead time for the custom product.     

Multiple criteria decision analysis of treatment and land-filling technologies for waste incineration residues

In this paper, we present a real-world case realized in Switzerland on behalf of the federal agency in charge of the waste policy. The incineration of urban wastes generates hazardous residues that need specific treatment and/or land-filling technologies. The variety of local situations and appraisals led to the choice of very different solutions. Moreover, proponents were keen to propose new technologies. The purpose of this study was to provide the background for a national policy that would apply to all future projects.     

员工社会化、组织认同与组织公民行为——基于中国科技制造企业的实证研究

组织社会化的策略、内容及其对员工态度和行为影响的研究已经比较丰富,但在结果变量上对组织公民行为的分析和实证研究都很不足。本文选取了组织社会化中的历史、语言、价值观和目标社会化三项内容,考察它们对组织公民行为的影响及其机制,尤其是组织认同在其中的中介作用。层级回归、结构方程建模分析的结果表明,历史、语言、价值观和目标社会化正向影响组织公民行为,组织认同在语言、价值观和目标社会化与组织公民行为的关系中起完全中介作用,在历史社会化与组织公民行为的关系中起部分中介作用。     

Islamic death rituals in a small town context in The Netherlands: explorations of a common praxis for professionals

Islamic tradition tends to present death rituals in a quite univocal way, as the actual ritual practice shows to be far more diverse and flexible. This study focuses on the particular ritual of the cleansing of the deceased as it is practiced by a variety of Muslims in a small town context in The Netherlands. The presented vignettes are drawn on qualitative research data from interviews and (participant) observations. They are presented to draw attention to the different contexts that shape the religious and ritual practice of a variety of Muslims in The Netherlands. To develop an eye for this common praxis, it is important not only to be aware of the religious dimensions but also of the social dimensions. By offering insights into the actual practices it aims to offer tangible leads to professionals for a more tailor-made care for Muslim patients and their relatives.     

The Effects of Evaluating Video Examples of Staffs' Own Versus Others' Performance on Discrete-Trial Training Skills in a Human Service Setting

Many studies have been conducted evaluating the use of feedback in staff training in organizational settings. Central to this literature has been the use of a variety of forms of feedback, including videotaped feedback. A distinction is outlined between video modeling and a variety of possible video feedback procedures. Previous studies have indicated a possible positive training effect on staff skills from simply being exposed to relevant videotaped performances of those skills or as a result of evaluating video modeled performances. This study evaluated the effectiveness for training teaching skills of having staff evaluate videotaped teaching skills as performed by themselves versus others. The current study results replicate earlier research on the effectiveness of evaluating video models as a training method and do not suggest a difference between observing oneself as opposed to observing someone else. Future research suggestions for the general use of video in training are provided.     

Data Mining for Network Intrusion Detection: A Comparison of Alternative Methods*

Intrusion detection systems help network administrators prepare for and deal with network security attacks. These systems collect information from a variety of systems and network sources, and analyze them for signs of intrusion and misuse. A variety of techniques have been employed for analysis ranging from traditional statistical methods to new data mining approaches. In this study the performance of three data mining methods in detecting network intrusion is examined. An experimental design (3times2x2) is created to evaluate the impact of three data mining methods, two data representation formats, and two data proportion schemes on the classification accuracy of intrusion detection systems. The results indicate that data mining methods and data proportion have a significant impact on classification accuracy. Within data mining methods, rough sets provide better accuracy, followed by neural networks and inductive learning. Balanced data proportion performs better than unbalanced data proportion. There are no major differences in performance between binary and integer data representation.     

A survey on nonadaptive group testing algorithms through the angle of decoding

Group testing, sometimes called pooling design, has been applied to a variety of problems such as blood testing, multiple access communication, coding theory, among others. Recently, screening experiments in molecular biology has become the most important application. In this paper, we review several models in this application by focusing on decoding, namely, giving a comparative study of how the problem is solved in each of these models.     

Investigating the effect of product variants,and demand distributions on the optimal demand supply network setup

In today's marketplace, consumers are looking for product variety and low prices. In this paper, we investigate how product variation and demand distributions affect demand supply network optimality in a real-life based setting. The research methodology was based on a novel Petri net formulation, which employs reachability analysis to demand supply network optimisation. We found that in our case study localised final assembly is justified with one or two product variants, but a centralised production should be favoured with three or more product variants. We also noted the sensitivity of this result to transport cost/inventory carrying cost tradeoff.     

Unitary, Divisional, And Matrix Forms As Political Governance Systems

In this study I reassess a set of fundamental organization forms (unitary, divisional, and matrix) as agenda-setting and political governance systems. My method of analysis is based on how political scientists study agendas in committees. Specifically, I first recount that moving from a functional (unitary) to a product-line (divisional) structure increases the types of conflict referred from lower to higher levels of the hierarchy, but does not increase the amount of conflict referred. I then show that moving from a product-line to a matrix structure increases the amount and the types of conflict referred to higher levels of the hierarchy; that it is possible in matrix forms that no conflict is resolved at the lowest levels of the hierarchy; and, that accountability is reduced for those who are able to refer conflict. The study reveals implications for matrix forms that derive from this view of organizations as agenda-setting and political governance systems. This analysis fits with the recent history of matrix forms in a variety of organizations.     

How Prevalent Are Stable-Paretian Distributed Financial Variables?

Many studies have claimed that the stable-Paretian distribution should be used to model a wide variety of financial variables, ranging from stock and futures prices to exchange rates. Using a newly developed method, this study shows that the stable distribution is unsuitable for modeling most financial variables that are stable-distributed. We found that the distributions of a few accounting ratios may be stable. Our conclusions support a change in the future directions of financial-variable modeling.     

EMPIRICAL TESTS OF CONSTRAINED NONLINEAR OPTIMIZATION ALGORITHMS

A major difficulty in practicing constrained nonlinear optimization is that different optimization algorithms are effective for different classes of problems. The search algorithms tested were selected because they seemingly had the capability of solving ill-defined problems. The emphasis of this research was on problems that are realistic and do not necessarily satisfy the classical assumptions of convexity, continuity, unimodality, etc. All algorithms were tested on a variety of problems. A problem was described by three types of attributes: the environmental attributes, the objective function attributes, and the constraint set attributes. The results of the study provide selective logic for choosing an effective search algorithm.     

Dynamic Group Scheduling Heuristics in a Flow-through Cell Environment*

The increased use of cellular manufacturing configurations designed to grapple with increasing competitive pressures is providing manufacturing managers and engineers with a broad variety of operational challenges. Many questions concerning the best procedures and policies for the day-to-day operation of manufacturing cells are still unanswered. The primary objective of this study is to compare the performance of traditional single-stage heuristics and the two-stage group scheduling heuristics that have exhibited superior performance in previous studies in a flow-through cell environment under a rigorous set of experimental conditions. Such a comparison is of great interest since each previous study has focused on proposing new heuristics and testing them against some particular baseline heuristic, often without comprehensive comparisons to the broad variety of previously proposed heuristics. Two single-stage heuristics and four two-stage heuristics are examined under sixteen experimental conditions (four experimental factors at two levels each). The experimental factors examined are shop load, due date tightness, setup to run-time ratio, and interarrival time distribution. Results vary by experimental condition and performance criteria, but in general, two-stage heuristics outperformed single-stage heuristics under all experimental conditions, as well as being relatively insensitive to changing experimental conditions. In addition, two of the two-stage heuristics displayed superior performance on all performance measures under most experimental conditions. Finally, the results indicated that interarrival time distribution does have a major impact on the performance of scheduling heuristics.     

Societal effects of social media in organizations: Reflective points deriving from a systematic literature review and a bibliometric meta-analysis

Social media provides its users with uninterrupted access to information for a variety of matters. On the one hand, social media helps people to express themselves freely and access various content, thus, forming a global view. On the other hand, social media may easily lead individuals to form polarized attitudes by impacting their behaviour in various contexts (e.g., organizational contexts). Such contradiction cannot be neglected. It is found to be an essential societal phenomenon that needs further investigation. The study first aims at realizing how existing literature of different domains analyse and conceptualize the effects of social media. Then, it leverages such societal effects on organizations. A total of 231 articles were used for a systematic literature review (SLR) and bibliometric meta-analysis on this topic and were further analysed with VOSviewer software. The study organizes the existing literature on this topic and provides issues, perceptions, and theories that are used to explain the effects of social media in society, and then it reflects on the potential impact on organizations.