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951.
《Review of Economic Dynamics》2014,17(3):367-382
We examine the role of generalized stochastic gradient constant gain (SGCG) learning in generating large deviations of an endogenous variable from its rational expectations value. We show analytically that these large deviations can occur with a frequency associated with a fat-tailed distribution even though the model is driven by thin-tailed exogenous stochastic processes. We characterize these large deviations, driven by sequences of consistently low or consistently high shocks and then apply our model to the canonical asset pricing framework. We demonstrate that the tails of the stationary distribution of the price–dividend ratio will follow a power law. 相似文献
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本文主要结合国内物流管理专业所存在的问题进行探讨,而"做中学"为理论与实践相结合的典型形式,本文则围绕于此提出建议。 相似文献
954.
Abraham Carmeli Ari Dothan Dev Kumar Boojihawon 《Business Strategy and the Environment》2020,29(1):154-169
To answer key questions concerning how negative and positive financial performance gaps motivate organizations to build more resilient systems, we develop a conceptual process model to reveal the process by which financially and sustainability‐driven organizations can translate these negative and positive financial performance gaps into organizational resilience. We specify the different modes of search behaviors that these organizations pursue when encountering negative and positive financial performance gaps. We then expand on group engagement model to theorize that vicarious search is likely to encourage limiting behaviors, whereas internal search is likely to foster promotion behaviors. Finally, we explain how both promoting and limiting behaviors can be helpful in improving organizational resilience. In this way, we hope to advance research that connects and integrates relatively disparate realms and, more specifically, to contribute to the sustainability, resilience, and performance feedback literatures. 相似文献
955.
基于能力的企业持续成长内在机理 总被引:1,自引:0,他引:1
企业要想实现持续成长,关键在于能否找到持续成长的根本原因并把握其内在规律。本文通过"斜坡球体定律"和"企业成长的力场"分析,描述了企业持续成长的动态平衡过程;用简单的物理知识,形象地阐述了企业持续成长与企业能力之间的关系,结论是:着重分析企业持续成长中的企业能力演化,理清企业持续成长和企业能力演化的关系,才能找到企业持续成长的根本原因和规律。 相似文献
956.
建筑安装工程预算是一门综合性较强的学科,由建筑给排水、采暖、通风空调、电器等多个专业,多个学科组成,是一门独立的,实践性很强的课程。本课程没有过多的理论和公式的推导,重点在于知识的掌握和应用,因此在学习的过程中有很多需要注意的地方。 相似文献
957.
Peter King 《Economic Affairs》2011,31(1):86-89
This paper explores the issue of responsibility and links it to the concept of capability. The paper begins by looking at what it means to be responsible and connects this to the now common distinction in public policy between blame and task. It is argued that responsibility should be internalised rather than externalised and placed in the hands of the state. This can be done through the extension of property rights and so the paper offers a brief justification for the link between responsibility and property rights. The final part of the paper considers the ideas of capability and competence and uses these to argue for the placing of personal responsibility at the heart of public policy. 相似文献
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《International Journal of Forecasting》2023,39(1):192-208
Emergency Departments (EDs) can better manage activities and resources and anticipate overcrowding through accurate estimations of waiting times. However, the complex nature of EDs imposes a challenge on waiting time prediction. In this paper, we test various machine learning techniques, using predictive analytics, applied to two large datasets from real EDs. We evaluate the predictive ability of Lasso, Random Forest, Support Vector Regression, Artificial Neural Network, and the Ensemble Method, using different error metrics and computational times. To improve the prediction accuracy, new queue-based variables, that capture the current state of the ED, are defined as additional predictors. The results show that the Ensemble Method is the most effective at predicting waiting times. In terms of both accuracy and computational efficiency, Random Forest is a reasonable trade-off. The results have significant practical implications for EDs and hospitals, suggesting that a real-time performance monitoring system that supports operational decision-making is possible. 相似文献
960.
大学英语教学的大班化已经成为不可改变的趋势。但在大班课堂教学中,如何开展多维互动已成为制约英语教学效果的主要因素。本文旨在通过调查,强调实施合作学习从而寻找到英语大班授课的多维互动模式,为大班英语教学找出了新的路子。 相似文献