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This paper describes a model which may be used in the evaluation of the relative effectiveness of policies used in the areas of ship chartering and the switching of combined carriers between the dry cargo market and the tanker market. The policies for chartering and market switching are expressed in the form of ‘desired proportions’ of the fleet operating in a particular charter-mode or a particular market. Graphical illustration of this form of expression of policies can be easily understood, so that alternative policies can be designed with relative ease. The effectiveness of a particular form of policy under various freight market conditions can be determined from the model, the use of which is illustrated by its application to the deployment of the fleet of an hypothetical shipping company. It is assumed that the feedback connection between the company's actions and the marketplace is negligible. 相似文献
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Nelson SE LaPlante DA Peller AJ Schumann A LaBrie RA Shaffer HJ 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2008,24(4):463-477
The recent expansion of Internet gambling has stimulated debate, policy, and research on this relatively new phenomenon and
its potential consequences. The current study focuses on bettors experiencing problems by sampling Internet gamblers who imposed
limits on the amount they were allowed to deposit to a betting site. We analyzed the betting transactions over 18 months of
all gamblers who subscribed to an online betting site in February, 2005 (N = 47,134), 567 of whom utilized the site’s self-limit feature. Self-limiting gamblers played a wider variety of games and
placed more bets than others prior to imposing limits. After imposing limits, self-limiters reduced their activity, but did
not reduce the amount they wagered per bet. Time spent gambling, not just money spent, appears to be an important indicator
of gambling problems. Self-limit programs appear to be promising options for Internet gamblers at-risk for gambling problems.
相似文献
Sarah E. NelsonEmail: |
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Peller AJ LaPlante DA Shaffer HJ 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2008,24(4):519-534
There have been claims that new gambling technology is hazardous to player health, and that technological interventions can
alleviate gambling-related harm. In this paper, we systematically review the empirical research about the nexus between gambling
and technology to evaluate the veracity of these claims. We use a public health perspective (i.e., the Epidemiologic Triangle)
to organize and present study results (i.e., agent, host, and environment). This review intends to offer insight about emerging
technology and identify areas that indicate a need for additional research. Forty-seven studies met our inclusion and exclusion
criteria; a review of this body of work shows that attempts to develop and implement safety features for new gambling technology
are promising, but methodologically are rudimentary and limited in scope. Increased attention to the dynamic interaction among
host, agent, and environment factors hold potential to advance the field. In addition, improved study methods (e.g., longitudinal
analyses of actual betting behavior), and collaboration among policymakers, manufacturers, and researchers can increase understanding
of how new gambling technology affects the public health and stimulate new strategies for implementing effective public health
interventions.
相似文献
Allyson J. PellerEmail: |
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The problem considered is that of choosing batch quantities to minimize costs, subject to the constraints that neither overall set-up costs nor overall set-up time can be increased beyond certain limits. Theoretical and graphical solutions are obtained for two possible formulations of the problem, and a simple practical procedure is suggested. 相似文献
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LaBrie RA Nelson SE LaPlante DA Peller AJ Caro G Shaffer HJ 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2007,23(2):231-243
According to public health research, exposure to casinos is a risk factor for disordered gambling. Consequently, casino self-exclusion
programs, which provide gamblers with the opportunity to voluntarily seek limits on their access to gambling venues, can serve
as a barometer of the concentration of disordered gambling in an area. This study reports on the distribution, both temporally
and geographically, of 6,599 people who applied to exclude themselves from Missouri casinos between November, 1996 and February,
2004. Analyses used Microsoft MapPoint to plot the location of casinos and self-excluders (SEs) across Missouri and its constituent
counties. These regional exposure analyses showed that the Western region around Kansas City is an epicenter of disordered
gambling as, to a lesser extent, is the Eastern region around St. Louis. The annual number of SE enrollments increased during
the first few years of the Missouri self-exclusion program and then leveled off during the later years. These findings have
important implications for public health and the development of public health interventions for disordered gamblers. 相似文献
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