Search results
1 – 10 of over 26000Santiago Arango, Erik R. Larsen and Ann van Ackere
The purpose of this paper is to consider queuing systems where captive repeat customers select a service facility each period. Are people in such a distributed system, with…
Abstract
Purpose
The purpose of this paper is to consider queuing systems where captive repeat customers select a service facility each period. Are people in such a distributed system, with limited information diffusion, able to approach optimal system performance? How are queues formed? How do people decide which queue to join based on past experience? The authors explore these questions, investigating the effect of information availability, as well as the effect of heterogeneous facility sizes, at the macro (system) and micro (individual performance) levels.
Design/methodology/approach
Experimental economics, using a queuing experiment.
Findings
The authors find little behavioural difference at the aggregate level, but observe significant variations at the individual level. This leads the authors to the conclusion that it is not sufficient to evaluate system performance by observing average customer allocation and sojourn times at the different facilities; one also needs to consider the individuals’ performance to understand how well the chosen design works. The authors also observe that better information diffusion does not necessarily improve system performance.
Practical/implications
Evaluating system performance based on aggregate behaviour can be misleading; however, this is how many systems are evaluated in practice, when only aggregate performance measures are available. This can lead to suboptimal system designs.
Originality/value
There has been little theoretical or empirical work on queuing systems with captive repeat customers. This study contributes to the understanding of decision making in such systems, using laboratory experiments based on the cellular automata approach, but with all agents replaced by humans.
Details
Keywords
David Willer, Lisa Rutström, Linda B. Karr, Mamadi Corra and Dudley Girard
Reports on a project to create a new infrastructure for experimental economics and sociology by connecting cutting edge research to Web‐based software development. The project…
Abstract
Reports on a project to create a new infrastructure for experimental economics and sociology by connecting cutting edge research to Web‐based software development. The project will build and maintain an active Web site of highly flexible modular architecture for theoretically‐driven experimentation. The Web site, itself a laboratory, fundamentally advances experimental study, automatically records and archives data, and maintains electronic journals. To increase the integrity and effectiveness of social science knowledge acquisition, the Web site will support replications while creating large and systematic databases. The Web‐lab’s goal is to change social science investigation by allowing experiments to be run using subjects from large and diverse populations. The Web‐lab will democratize experimental research; a local laboratory will need no more than a few computers with access to the Web. Using designs at the Web‐lab, extensive laboratory components will be developed for mainstream graduate and undergraduate social science courses.
Details
Keywords
Travis Tokar, John A. Aloysius, Matthew A. Waller and Brent D. Williams
Communication between supply chain partners is critical for replenishment decision making. Decision support systems still require significant human decision making with regard to…
Abstract
Purpose
Communication between supply chain partners is critical for replenishment decision making. Decision support systems still require significant human decision making with regard to replenishment when promotions are involved. The purpose of this paper is to study the impact of the sharing of information about the magnitude and timing of retail promotions on cost efficiency in the supply chain. The authors compare performance against theoretical benchmarks and draw conclusions significant to managers.
Design/methodology/approach
The subjects in Study 1, 30 undergraduate students at a large, US university, completed the experiment in a single session lasting approximately 60 minutes. The experiment involved a simple, multi‐period replenishment task, played as individuals, that was somewhat like the newsvendor game. Subjects in the experiment employed in Study 2 were senior‐level members of multiple departments from a large consumer products manufacturer in the USA. Participating departments included sales, operations, and supply chain. Self‐reported questionnaires revealed that the average subject had 15 years of experience with supply chain issues and seven years of experience with replenishment. The study was conducted in a single session, lasting approximately two hours, at the corporate headquarters of the participating company. In this experiment, 76 unique subjects participated.
Findings
Results from the single‐echelon study reveal the cost‐reducing effect of knowing the magnitude and timing of demand generated by a promotion. However, the poor performance, compared with the theoretical benchmarks, by respondents in the multi‐echelon study, even when the lead time per node is half that of the single‐echelon case and the subjects were experienced managers, highlights the complexity of the task that results from a lack of coordination.
Practical implications
Billions of dollars are spent on retail promotions each year. The management of the forecasting and replenishment of inventory for such promotions is difficult to automate and requires significant human decision making. The paper explores some key issues that are important in the replenishment decision‐making scenario when a promotion is involved.
Originality/value
Although the most obvious managerial recommendation for reducing the coordination and planning problems associated with promotions is simply to communicate more, the authors' research also suggests it may not be enough to alter performance. The results suggest that while communication is helpful, coordination may represent a more serious challenge.
Details
Keywords
This paper aims to advocate and facilitate undertaking research focused on the effects of human behaviour, judgment and decision making in logistics and supply chain management…
Abstract
Purpose
This paper aims to advocate and facilitate undertaking research focused on the effects of human behaviour, judgment and decision making in logistics and supply chain management (SCM).
Design/methodology/approach
In addition to providing an overview of the potential benefits of behavioural research, this paper presents two modified frameworks for identifying and addressing behavioural issues in logistics and SCM.
Findings
Behavioural research can significantly advance both theory and practice in logistics and SCM. Little behavioural research appears in top logistics journals. As researchers begin to conduct more such projects, knowledge pertaining to issues of importance to logistics and SCM will be created.
Originality/value
This paper highlights an important research area and a methodology, (controlled behavioural experiments), that are currently underutilized in logistics and SCM. It further presents potential research questions and suggestions for ways in which interested researchers could begin to address such issues.
Details
Keywords
Argues that Humphrey’s tearoom trade study, misinforms readers as much as it informs, regarding moral and ethical foundations for research with human subjects. States that…
Abstract
Argues that Humphrey’s tearoom trade study, misinforms readers as much as it informs, regarding moral and ethical foundations for research with human subjects. States that Humphrey’s tearoom study made significant positive contributions to the population he studied. Concludes that few studies in sociology have accomplished as much in a single work.
Details
Keywords
Behnood Momenzadeh, Shakthidhar Gopavaram, Sanchari Das and L. Jean Camp
The purpose of this paper is to propose practical and usable interactions that will allow more informed, risk-aware comparisons for individuals during app selections. The authors…
Abstract
Purpose
The purpose of this paper is to propose practical and usable interactions that will allow more informed, risk-aware comparisons for individuals during app selections. The authors include an explicit argument for the role of human decision-making during app selection and close with a discussion of the strengths of a Bayesian approach to evaluating privacy and security interventions.
Design/methodology/approach
The authors focused on the risk communication in mobile marketplace’s realm, examining how risk indicators can help people choose more secure and privacy-preserving apps. Combining canonical findings in risk perception with previous work in usable security, the authors designed indicators for each app to enable decisions that prioritize risk avoidance. Specifically, the authors performed a natural experiment with N = 60 participants, where they asked them to select applications on Android tablets with accurate real-time marketplace data.
Findings
In the aggregate, the authors found that app selections changed to be more risk-averse in the presence of a user-centered multi-level warning system using visual indicators that enabled a click-thru to the more detailed risk and permissions information.
Originality/value
Privacy research in the laboratory is often in conflict with privacy decision-making in the marketplace, resulting in a privacy paradox. To better understand this, the authors implemented a research design based on clinical experimental approaches, testing the interaction in a noisy, confounded field environment.
Details
Keywords
Ruben Huertas‐Garcia, Agusti Casas‐Romeo and Esther Subira
Internet is set to be one of the main channels of distribution in the future and already greatly facilitates product evaluation thanks to the information available on the net. The…
Abstract
Purpose
Internet is set to be one of the main channels of distribution in the future and already greatly facilitates product evaluation thanks to the information available on the net. The main advantages of electronic shopping over other channels include the reduced costs of searching for products and for product‐related information. Research has stressed the importance of quality information in web site design. The perceived utility of a web site depends on the perceived utility of its content (i.e. quality of information on product characteristics) and its presentation of that content. This paper compares the ways in which a web site's content and content presentation affect the product choice of two consumer groups from different cultures. The paper aims to discuss these issues.
Design/methodology/approach
The authors conduct an exploratory study to determine the key factors which may be used in a later conclusive research. The authors propose a tool based on the statistical design of experiments to determine the number of significant factors used by two market segments (Spanish and US students) when selecting a bottle of wine sold via a web site.
Findings
The authors identify key extrinsic factors of consumers' perceived utility when selecting a bottle of wine from a web site and analyse whether cross‐cultural aspects are significant in this choice. The authors assume that web site evaluations made by users from different geographical areas reflect their preferences for more familiar designs.
Research limitations/implications
The sample size does not enable us to determine the significance of certain variables. Moreover, the sample is not fully representative of the overall consumer population, and so inferences cannot be made about all consumers. However, since the study is exploratory with a theoretical content, the results can be considered valid.
Practical implications
Web page designers need to take into account the cultural characteristics of their target market in the presentation and content of their sites.
Originality/value
The internet marketing literature considers cultural differences in web design as a tool to improve user confidence and attitude. However, few studies have examined the effects of the cultural adaptation of web sites on user evaluations. Here, the authors propose a straightforward procedure for calculating the main effects of web site attributes. Yates' algorithm and the normal probability plot, proposed by Daniel, can be implemented in any spread sheet.
Details
Keywords
Three events of significance to this country took place in 1899 – the British Food Journal was launched, Australia retained the Ashes, and the Boer War hostilities commenced. If…
Abstract
Three events of significance to this country took place in 1899 – the British Food Journal was launched, Australia retained the Ashes, and the Boer War hostilities commenced. If challenged on the order of their importance, cricketers and Empire‐builders may be excused their preference. However, looking at it purely from the standpoint of pro bono publico, the dispassionate observer must surely opt for the birth of a certain publication as being ultimately the most beneficial of the three.
Presents the scientific methodology from the enlarged cybernetical perspective that recognizes the anisotropy of time, the probabilistic character of natural laws, and the entry…
Abstract
Presents the scientific methodology from the enlarged cybernetical perspective that recognizes the anisotropy of time, the probabilistic character of natural laws, and the entry that the incomplete determinism in Nature opens to the occurrence of innovation, growth, organization, teleology communication, control, contest and freedom. The new tier to the methodological edifice that cybernetics provides stands on the earlier tiers, which go back to the Ionians (c. 500 BC). However, the new insights reveal flaws in the earlier tiers, and their removal strengthens the entire edifice. The new concepts of teleological activity and contest allow the clear demarcation of the military sciences as those whose subject matter is teleological activity involving contest. The paramount question “what ought to be done”, outside the empirical realm, is embraced by the scientific methodology. It also embraces the cognitive sciences that ask how the human mind is able to discover, and how the sequence of discoveries might converge to a true description of reality.
Details
Keywords
Dalia De Santis, Jacopo Zenzeri, Maura Casadio, Lorenzo Masia, Valentina Squeri and Pietro Morasso
The working hypothesis, on which this paper is built, is that it is advantageous to look at protocols of robot rehabilitation in the general context of human-robot interaction in…
Abstract
Purpose
The working hypothesis, on which this paper is built, is that it is advantageous to look at protocols of robot rehabilitation in the general context of human-robot interaction in haptic dyads. The purpose of this paper is to propose a new method to detect and evaluate an index of active participation (AC index), underlying the performance of robot-assisted movements. This is important for avoiding the slacking phenomenon that affects robot therapy.
Design/methodology/approach
The evaluation of the AC index is based on a novel technique of assistance which does not use constant or elastic forces but trains of small force impulses, with amplitude adapted to the level of impairment and a frequency of 2 Hz, which is suggested by recent results in the field of intermittent motor control. A preliminary feasibility test of the proposed method was carried out during a haptic reaching task in the absence of visual feedback, for a group of five stroke patients and an equal group of healthy subjects.
Findings
The AC index appears to be stable and sensitive to training in both populations of subjects.
Originality/value
The main original element of this study is the proposal of the new AC index of voluntary control associated with the new method of pulsed haptic interaction.
Details