Strategy

In many important combinatorial optimization problems, such as bin packing, allocating customer classes to queueing facilities, vehicle routing, multi-item inventory replenishment and combined routing/inventory control, an optimal partition into groups needs to be determined for a finite collection of objects; each is characterized by a single attribute. The cost is often separable in the groups and the group cost often depends on the cardinality and some aggregate measure of the attributes, such as the sum or the maximum element.

A meta-analysis of results from 320 published studies relates environmental, strategic, and organizational factors to financial performance. The 320 empirical studies that were reviewed were published between 1921 and 1987. Findings from the most frequently studied relationships include: 1. Industry concentration was addressed in almost 100 studies; over 1,100 tests show a clear directional effect. 2. Growth, analyzed in 88 studies, is consistently related to higher financial performance. 3. Market share is positively associated with financial performance. 4.

Similarity scaling often requires subjects to produce such a large number of judgments that fatigue may become a problem. Yet it remains unclear just how respondent fatigue affects similarity perceptions and resulting judgments. The present study uses a categorization perspective to examine the effects of fatigue on similarity judgments. The results suggest that subjects rely increasingly on category membership as they progress through a similarity judgment task.

Meta-analysis has become a popular approach for studying systematic variation in parameter estimates across studies. This article discusses the use of meta-analysis results as prior information in a new study. Although hierarchical prior distributions in a traditional Bayesian framework are characterized by complete exchangeability, meta-analysis priors explicitly incorporate heterogeneity in prior vectors.

This article presents an exploratory investigation into longitudinal patterns of influence in group decision-making. In particular, we focus on how the outcomes of past decisions affect group members' relative influence in future joint decisions. Results suggest that past outcomes play an important role in the resolution of disagreements when group member preferences are equally intense. Losers in prior decisions are likely to win in the future (and vice versa) due to what appears to be promotion of equity in the group.

A shopping mall, new office towers, a convention center, an atrium hotel, a restored historic neighborhood. These are the civic agenda for downtown development in the last third of the twentieth century, a trophy collection that mayors want. Add a domed stadium, aquarium, or cleaned-up waterfront to suit the circumstances, and you have the essential equipment for a first-class American city.

A central assumption of meta-analysis is that the sample of studies fairly represents all work done in the field, published and unpublished. However, if studies with "poor" results are less likely to be published, a potential publication bias is present. The authors propose a maximum likelihood approach to estimating publication bias for the situation in which censorship based on effect size may occur. An explicit hypothesis test is provided for testing whether or not censorship is present.

In most vehicle routing problems, a given set of customers is to be partitioned into a collection of regions each of which is assigned to a single vehicle starting at a depot and returning there after visiting all of the region's customers exactly once in a route. In this paper we consider problem settings where the cost of a route may depend on its length ϑ as well as m, the number of points on the route, according to some general function f(ϑ,m), assumed to be nondecreasing and concave in ϑ.

The ultimate success of new product R&D depends as much on customer acceptance as on technological breakthroughs. In this article, Susan Holak and Donald Lehmann focus on customer acceptance by exploring the manner in which the general attributes of Rogers (relative advantage, compatibility, complexity, divisibility and communicability) plus perceived risk combine to form the intention to buy an innovation. Results demonstrate a causal structure among these attributes and lead to various implications for R&D guidelines and product design.