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61.
A well-known myopic bidding strategy fails to support an equilibrium of simultaneous ascending proxy auctions for heterogeneous items when a hard-close rule is in place. This is because, in common with the single-auction case, last minute bidding (sniping) is a best response to naive behaviour. However, a modification to the myopic strategy in which all bidders submit an additional bid in the closing stages of the auction–a practice I call ‘defensive sniping’–is shown to yield an efficient, belief-free equilibrium of such environments. This equilibrium is essentially unique within the class of belief-free, efficient equilibria. 相似文献
62.
Ahmed Al‐Hadi Mostafa Monzur Hasan Grantley Taylor Mahmud Hossain Grant Richardson 《Journal of International Financial Management & Accounting》2017,28(3):349-393
This study examines the association between market risk disclosures (MRDs) and the investment efficiency of financial firms from six emerging markets in the Gulf Cooperation Council (GCC) region. Based on a sample of 553 firm‐year observations over the 2007–2011 period, we find that MRDs are significantly and negatively associated with both under‐investment and over‐investment and that this association is more pronounced for larger firms. We also find that the association between MRDs and under‐investment is moderated during periods of economic distress such as the Global Financial Crisis of 2008 and that the association between MRDs and over‐investment is magnified during periods of reduced financial distress. Our results are consistent with the idea that MRDs reduce information asymmetry, which ultimately improves investment efficiency. We contribute to the literature in an emerging market context by providing empirical evidence on the association between MRDs and investment efficiency across six emerging GCC capital markets. This study also fills a gap in the literature by providing evidence on the factors affecting the investment efficiency of financial firms. 相似文献
63.
G. Don Taylor Gary L. Whicker W. Grant DuCote 《Transportation Research Part E: Logistics and Transportation Review》2009,45(1):255-269
This paper examines a new dispatching alternative for the truckload trucking industry involving the use of delivery ‘pipelines’ with dense flow volumes. Drivers and loads are partitioned into two sets; those that utilize pipelines via a series of ‘dray’ moves and line-hauls, and the remaining set of random over-the-road (OTR) drivers that are dispatched by traditional methods. Alternative methods are presented to determine where delivery pipelines should be located and how they should be operated. The effects of the pipelines on the remaining OTR fleet are also examined. Results indicate that the new dispatching alternative is feasible. 相似文献
64.
Jim Butcher 《Journal of Sustainable Tourism》2013,21(7):997-1002
This opinion piece reviews and critiques the opinion piece by David Fennell which presents a proposal for a new article about the ethical treatment of animals to be added to the UNWTO Global Code of Ethics for the tourism industry. The case presented here rests on a detailed examination of the use of the concepts of speciesism and anthropocentrism in the original opinion piece. It finds that, while speciesism is currently a fashionable way to draw parallels between animals and humans, it is dependent on the evidence around the questions of sentience, cognition and consciousness. While there is increasing evidence for animal sentience and cognition, human consciousness is wholly different from that of even the most advanced animals. And, although anthropocentrism is a dominant idea in many forms of political decision making in general, it cannot be used as a stick with which to beat tourism scholarship: many writers on tourism adopt distinctly ecocentric lines of argument, including the concepts of ecotourism and sustainable tourism. The paper also notes that only ca. 30% of UNWTO's national members had given legal recognition to the existing code of ethics nearly 10 years after its ratification by the UN. 相似文献
65.
Recognising the potential conservation impact, zoos regularly ask their visitors to undertake pro-wildlife behaviour. This paper presents the results of two studies undertaken to address the question: how often during a visit should visitors be asked? Study 1 sought to a) determine individuals' personal thresholds and b) the point where the number of different behaviours requested began affect visitors' experiences. Study 2 sought the same, but focused on requests for the same behaviour. Results suggest that few respondents' personal thresholds were crossed (2.5% in Study 1 and 9% in Study 2). In neither study did many respondents (2.5% in Study 1 and 2.8% in Study 2) feel that the number of requests negatively affect their overall zoo experience. While there are caveats, we conclude that there appears little cause for concern about asking zoo visitors on multiple occasions to act in support of wildlife. Indeed, such requests may improve experiences. 相似文献
66.
Sarah R. Taylor 《Journal of Sustainable Tourism》2017,25(3):433-449
Tourism development is a key feature of the neoliberal economic development model. Through a mix of state and private investment, Indigenous communities in Mexico are encouraged to transform local cultural and environmental resources into tourist consumption sites. The process results in a shift toward reliance on tourism, in place of farming, leaving households with few alternative earning strategies amidst fluctuating tourist arrivals and income, confounding the relationship between tourism and sustainability and questioning the utility of tourism as a sustainable tool for development. This article analyses a community-based Indigenous tourism project in a rural Maya village in Mexico's Yucatan, and discusses strategies employed at household level to navigate the arrival of tourism. Funding agencies assessed this project based on a triple bottom line metric that accounts for ecological health, financial sustainability, and its relationship to local social capital; however, these fail to account for differences between local and non-local conceptions of authenticity, indigeneity, and success. From a social perspective, the project has exacerbated existing tensions and has arguably widened the gap between the politically and economically powerful and less powerful, marginalized families in the community. Questions about policy, governance systems, and elite domination and kin group control are raised. 相似文献
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This paper studies goodness-of-fit tests for the bivariate Poisson distribution. Specifically, we propose and study several Cramér–von Mises type tests based on the empirical probability generating function. They are consistent against fixed alternatives for adequate choices of the weight function involved in their definition. They are also able to detect local alternatives converging to the null at a certain rate. The bootstrap can be used to consistently estimate the null distribution of the test statistics. A simulation study investigates the goodness of the bootstrap approximation and compares their powers for finite sample sizes. Extensions for testing goodness-of-fit for the multivariate Poisson distribution are also discussed. 相似文献