We extend the Pukthuanthong and Roll (2009) measure of integration to provide an estimate of systemic risk within international equity markets. Our measure indicates an increasing likelihood of market crashes. The conditional probability of market crashes increases substantially following increases of our risk measure. High levels of our risk measure indicate the probability of a global crash is greater than the probability of a local crash. That is, conditional on high levels of systemic risk, the probability of a severe crash across multiple markets is larger than the probability of a crash within a smaller number of markets. 相似文献
Geoscientists are faced with a number of complexities that represent obstacles to the development of realistic simulation of deep earth processes. Realistic 4D thermo-mechanical simulation using software packages like Underworld and Gale, when combined appropriately with geoscientific expertise, can lead to novel insights into the deformation of geological structures at a wide range of time and spatial scales. The challenge for end-user geoscientists lies in applying their knowledge within the framework of the software’s input specification, including initial, internal, and boundary conditions and output visualization parameters. We have built a Graphical User Interface (GUI) to remove many of the difficulties related to editing the Extensible Markup Language (XML) encoded input files of Underworld/Gale geomodels and therefore, to greatly broaden the user base of these software packages. By helping Underworld/Gale to meet a large audience, we provide a tool to the geoscience community that helps to move from untested conceptual models to physically valid, properly scaled modelling. Furthermore, the UnderworldGUI offers a mechanism for storing and retrieving experimental models in a centralised database, thus providing the geoscience community with a means to share the outcomes of its experimental research. Further details of the UnderworldGUI are available at the web site http://www.wiki.vislab.usyd.edu.au/moinwiki/UnderworldGUI. 相似文献
We estimate the relative contribution of recursive preferences versus adaptive learning in accounting for the tail thickness of price–dividends/rents ratios. We find that both of these sources of volatility account for volatility in liquid (stocks) but not illiquid (housing) assets. 相似文献
University business incubators (UBIs) are an important part of the ecosystem that supports entrepreneurial activities and economic development. Extant research has focused on examining UBI activities at a single point in time, but there is a paucity of theoretical and empirical work aimed at understanding the forces that explain why and how UBIs change over time. This is an important gap because establishing a university business incubator does not assure its development and growth. We address this issue by drawing upon the Fisher et al. Academy of Management Review, 41(3), 383-409 (2016) Identity-Legitimacy-Life Cycle model to explain how the pursuit of resources and organizational legitimacy shapes the development of UBIs along key strategic and operational dimensions, which has implications for performance evaluation over time. We illustrate with a case study about the creation and evolution of the DMZ, a leading UBI at Ryerson University in Canada. This case provides new insights about the dynamics of UBIs and their relationships with the entrepreneurial ecosystems in which they are embedded. Implications for future research, management practice, and public policy are discussed.
In this Point–Counterpoint article we argue that institutional scholarship has become overly concerned with explaining institutions and institutional processes, notably at the level of the organization field, rather than with using them to explain and understand organizations. Especially missing is an attempt to gain a coherent, holistic account of how organizations are structured and managed. We also argue that when institutional theory does give attention to organizations it inappropriately treats them as though they are the same, or at least as though any differences are irrelevant for purposes of theory. We propose a return to the study of organizations with an emphasis upon comparative analysis, and suggest the institutional logics perspective as an appropriate means for doing so. 相似文献
Before the debt crisis of 2010 forced Greece into almost permanent austerity, its hotel workers enjoyed wages and conditions (through a sector collective agreement) similar to those in other economic sectors. This was against the international trend where low wages and poor conditions were standard. Sweeping deregulation by Greek governments has brought much of the hotel industry into line with other countries. The sector agreement, now covering a much smaller proportion of the workforce, survived but has experienced ‘institutional conversion’, delivering a much poorer outcome. Despite buoyant tourism, institutional deregulation and derogation have delivered the employers' major objective of matching the workforce to the fluctuating demand for labour. 相似文献
Food shopping – although often dismissed as dreary necessity – has always served a range of latent functions. In the 1950s, food storage limitations and tight budgets gave rise to weekly – often daily – shopping patterns that also allowed shoppers to meet certain social needs. Going to food shops, and the way that customer service was organized, produced significant interactional opportunities which were valued by participants. Exchanging news with other customers may have reinforced shopping patterns but shopkeepers, and knowledgeable assistants, were also useful intermediaries for product and usage information. Functional specialization in food commodities bestowed the aura of expertise, and direct accountability for the quality of what was sold provided a more personal style of retailing than is currently typical. Much depended on the perception of relationships. The 1950s were an important transitional period in the UK. Rationing gave way to wider choice and availability, while the market position of corner shops was increasingly eclipsed by town centre supermarkets. This article explores the social context of food shopping, and its relationship to the specific issue of customer loyalty. 相似文献