An Experimental Examination of Spatial DecisionSupport System Effectiveness: The Roles of Task Complexity and Technology

Alaboratory experiment was used to investigate the effects on decision maker performance of using geographic information system (GIS) technology as a spatial decision support system (SDSS). The research examined two independent variables: task complexity (i.e., low, medium, and high complexity, and SDSS use (i.e., no SDSS versus SDSS support). Professionals who are experienced decision makers completed a site location task that required decisions to be made based upon spatially-referenced information. The results confirm the hypotheses and show that SDSS use and task complexity both have an important impact on decision quality and solution time. The study builds upon and extends image theory as a basis for explaining efficiency differences resulting from differing graphical displays of spatial informatio

It\u27s just a game, or is it? Real money, real income, and real taxes in virtual worlds

Virtual worlds like Second Life offer players opportunities to earn real-world income through their activities in the game. It will not be long before governments begin to establish policies and regulations regarding the income generated by players of these game environments. This paper examines the issue of taxes in virtual world games. Two alternative places for recognizing income could be established by regulators: 1) at the point when in-game transactions take place; or 2) when players convert game assets into real-world currency. We argue for realization of income, and therefore taxation, at the exchange. We expect that burdensome policies such as requiring game operators to monitor and report taxable activities to the authorities will dissuade game play and likely result in the collapse of these vibrant economies. Therefore, our recommendation is that the IRS should establish specific rules that inform players about how they should calculate income and work with game operators to inform participants of both the rules and consequences for non-compliance

I. Lagrand case (Germany v United States of America)

In the LaGrand case, the United States found themselves for the second time within three years before the International Court of Justice dealing with the death penalty imposed on foreign nationals in the United States.1 In contrast to the earlier case filed by Paraguay, the German-sponsored LaGrand case survived the provisional measures phase and went on to the merits stage. In its judgment of 27 June 2001, the Court largely affirmed all four German submissions and ruled that the United States had violated international law

Is a Map More than a Picture? The Role of SDSS Technology, Subject Characteristics, and Problem Complexity on Map Reading and Problem Solving

This research investigated how the use of a spatial decision support system (SDSS)—a type of geographic information system (GIS)—influenced the accuracy and efficiency of different types of problem solvers (i.e., professionals versus students) completing problems of varied complexity. This research—the first to simultaneously study these variables—examined subjects who completed a problem involving spatially-referenced information. The experiment was guided by a research model synthesized from various perspectives, including the theory of cognitive fit, prior research on map reading and interpretation, and research examining subject expertise and experience. The results are largely supportive of the research model and demonstrate that SDSS, an increasingly important class of management decision-making technology, increased the efficiency of users working on more complex problems. Professionals were found to be more accurate but less efficient than students; however, professionals who used the SDSS were no more accurate than professionals using paper maps. Need for cognition, a construct that focuses on an individual’s willingness to engage in problem solving tasks, was found to be marginally related to accuracy. The implications of these findings for researchers and practitioners are presented and discussed

U.S. Consumers’ Valuation of Quality Attributes in Beef Products

A sample of U.S. consumers were surveyed in a choice based experiment in the Fall of 2005 and Spring 2006 to elicit consumers’ preferences for quality attributes in beef products. Based on the resulting data, a random coefficients logit model is estimated, and consumers’ willingness to pay for these quality attributes in beef products is obtained. The results indicate that consumers have strong valuation for traceability, grass-fed, and U.S. origin attributes in a standard rib-eye steak and are willing to pay a premium for these attributes

U.S. Consumers’ Valuation of Quality Attributes in Beef Products

A sample of U.S. consumers were surveyed in a choice based experiment in the Fall of 2005 and Spring 2006 to elicit consumers’ preferences for quality attributes in beef products. Based on the resulting data, a random coefficients logit model is estimated, and consumers’ willingness to pay for these quality attributes in beef products is obtained. The results indicate that consumers have strong valuation for traceability, grass-fed, and U.S. origin attributes in a standard rib-eye steak and are willing to pay a premium for these attributes.choice experiment, conjoint analysis, quality attributes, random parameters, Consumer/Household Economics, Marketing, Q10, Q1,

Mine, Yours, Ours : Coordination through Workspace Arrangements and Territoriality in Tabletop Interaction

Previous research shows that territories help people coordinate their task and social interaction at large interactive tabletops. However, little is known about the interplay between territorially and the reorientation of digital objects and their influence on task performance. In this paper, we advance the hypothesis that territories are states of spatial arrangements continually changing during the collaborative activity and seek to better understand their role as a main mechanism in coordinating group activities. We report results from an explorative tabletop study that compares two types of technical settings workspaces supporting a brainstorming task. Our results show evidence of different territorial strategies dependent on the two conditions. We discuss the role of territoriality and orientation of digital notes as a mechanism for coordinating group activity and their influence on task performance and outcome. Finally, we present design recommendations derived from our findings.publishe