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A general, copula-based framework for measuring the dependence among financial time series is presented. Particular emphasis is placed on multivariate conditional Spearman's rho (MCS), a new measure of multivariate conditional dependence that describes the association between large or extreme negative returns—so-called tail dependence. We demonstrate that MCS has a number of advantages over conventional measures of tail dependence, both in theory and in practical applications. In the analysis of univariate financial series, data are filtered to remove temporal dependence as a matter of routine. We show that standard filtering procedures may strongly influence the conclusions drawn concerning tail dependence. We give empirical applications to two large data sets of high-frequency asset returns. Our results have immediate implications for portfolio risk management, derivative pricing and portfolio selection. In this context we address portfolio tail diversification and tail hedging. Amongst other aspects, it is shown that the proposed modeling framework improves the estimation of portfolio risk measures such as the value at risk.  相似文献   
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Urban transport policy in Australia has changed markedly over the period since the first generation of modern urban transport strategies were published in the 1960s. This is illustrated through a review of 43 transport strategies published for the five largest cities (Sydney, Melbourne, Brisbane, Perth and Adelaide) in Australia between 1965 and 2010. The review is complemented with observations from a survey of public servants in the policy and strategy divisions of state and territory transport agencies. The results of this research are examined using the Dolowitz–Marsh framework, considering the need to seek policy transfer, who is involved, what is transferred, from where policy lessons are learnt, the degree of transfer, constraints to policy learning and demonstration that transfer has occurred. The evidence for policy transfer and learning is mixed. Transport policy adopted by the states of Australia for their respective capital cities has been remarkably similar between the cities and has changed in a similar way over time, indicating the almost seamless transfer of concepts. Less positively, there is little published evidence that the performance of previous strategies has been critically examined and lessons learned, and that the approaches adopted in strategies are superior to alternative approaches and are able to achieve the objectives set for them.  相似文献   
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A company's inventory metrics are often viewed as critical indicators of its supply chain performance although inventory costs are only a fraction of total supply chain costs comprised of supplier, manufacturing, transportation, and warehousing costs, as well as inventory costs. Moreover, inventories across the supply chain are dependent on acquisition and distribution decisions. We discuss how simulation and optimization models can be combined to integrate analysis of inventory and supply chain network design decisions in performing a total cost analysis. An application of the models to plans for distributing retail products to an expanding network of stores is reviewed.  相似文献   
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The medieval Champagne fairs are widely used to draw lessons about the institutional basis for long-distance impersonal exchange. This paper re-examines the causes of the outstanding success of the Champagne fairs in mediating international trade, the timing and causes of the fairs' decline, and the institutions for securing property rights and enforcing contracts at the fairs. It finds that contract enforcement at the fairs did not take the form of private-order or corporative mechanisms, but was provided by public institutions. More generally, the success and decline of the Champagne fairs depended on the policies adopted by the public authorities — for good or ill.  相似文献   
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This article further develops a theory of guided preparation and new venture performance and tests its fundamental relationships on a sample of 159 new ventures that received outsider assistance 5–9 years earlier and had been in business for 3–8 years. The results suggest that the long-term growth of the ventures since start-up is significantly related to guided preparation. However, a curvilinear model rather, than a linear model, was found to best capture the relationships of interest. This suggests that there are diminishing marginal returns associated with guided preparation and that too much may even have a negative influence on performance.  相似文献   
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The recent development of olive growing in Western Australia, and its amalgamation with tourism and hospitality, provides opportunities for growers to showcase their products and for visitors to experience olive‐tasting and learn about an ancient food culture and rural activity ‘transplanted’ into the ‘New World’ from its ‘Old World’ roots. The present study examines the dimensions of this emerging niche market in Western Australia. Face‐to‐face and telephone interviews were conducted among 23 small olive‐growing operations located in this region to understand their scope for developing olive tourism. Overall, respondents' comments suggest that their involvement in olive tourism and hospitality could substantially provide benefits for visitors to rural areas and become a complementary alternative to other activities. To fulfil this potential, however, growers heavily rely on greater collaboration within their own industry, as well as on local authorities and tourism bodies in ways that include assistance, partnerships and promotion. Moreover, collaboration between olive growers and regional/tourism stakeholders, as well as government support may not only contribute to the sustainability of olive growing, but also to the emergence of olive tourism. In turn, these developments may also help develop a culinary identity and a tourism concept that may help minimise the threats of outside competition (cheaper olive imports) and rural decline. Copyright © 2010 John Wiley & Sons, Ltd.  相似文献   
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