基于超高频数据的日内风险价值度量研究

随着金融市场的快速发展,传统的以日为单位的风险价值（VaR）已无法满足金融风险管理的需求,计算持有期小于1天的日内风险价值（Intraday VaR）显得愈加重要。文中对日内风险价值测度的方法进行了梳理、细化和改进,对测度中细节给予更加充分的考虑,最后结合我国股市特点对日内风险价值测度进行了实证研究。     

Promoting remote workers' psychological health: Effective management practices during the COVID-19 crisis

The aim of this study was to identify specific management practices that promote the psychological health of remote workers in the context of the COVID-19 crisis. A two-round Delphi study was conducted among 28 teleworkers and 22 managers. A list of 60 specific management practices was presented and participants had to identify whether each one could be used in the current remote working context and, if so, how useful it was to promote psychological health at work. Results indicate that most specific management practices usually used in a face-to-face setting can also be used in a remote context (85%). Practices that show consideration, establishing work structure, and allowing flexibility were also identified as the most useful to promote remote workers' psychological health during the pandemic. This study contributes to the advancement of knowledge about specific management practices, remote working, and crisis management. It also suggests specific practices that managers can adopt to promote the psychological health of their employees during a period of crisis, even while managing from a distance.     

高新企业员工玩趣人格对创新行为作用机制实证研究

基于成年人玩趣与创新理论,通过对269名高新企业员工进行问卷调查,探讨了玩趣人格对创新行为的作用机制。研究发现,玩趣人格对创新行为具有显著正向影响;工作倦怠在玩趣人格与创新行为之间存在部分中介作用;员工敬业度在玩趣人格与创新行为关系中发挥调节作用。     

Cattle as a consistently resilient agricultural commodity

This study compares a range of agricultural commodities over periods of varying economic circumstances. These commodities are examined over three categories, including returns, risk, and contribution to portfolio optimisation. Consistency in these categories is determined over four equal three-year stages which comprise pre-GFC (Global Financial Crisis), GFC, post-GFC and post-post GFC. To demonstrate resilience in the most extreme circumstances, the study uses Conditional Value at Risk (CVaR), which measures extreme risk in the tail of a distribution, as the risk measure and risk-return optimiser. The study thus provides a unique and comprehensive extreme-risk based focus which identifies and ranks the consistency of performance of agricultural commodities over a range of criteria and conditions. Cattle commodities consistently demonstrate the strongest overall performance in the categories examined.     

知识型员工工作自主性对建言行为的影响

基于工作特征模型理论和自我决定理论,考察了中国组织情境下工作自主性对员工建言行为的影响,检验了员工归属感的中介作用与领导正直度的调节作用。对收集到的224份有效样本进行了层次回归分析,研究结果表明：①工作自主性与员工建言行为显著正相关;②员工归属感在工作自主性与员工建言之间的关系中起完全中介作用;③领导正直度对工作自主性与员工归属感和员工建言之间的关系有显著的弱化效应,并且员工归属感完全中介工作自主性与领导正直度间交互作用对员工建言行为的影响。     

Subsampling the distribution of diverging statistics with applications to finance

In this paper we propose a subsampling estimator for the distribution of statistics diverging at either known or unknown rates when the underlying time series is strictly stationary and strong mixing. Based on our results we provide a detailed discussion of how to estimate extreme order statistics with dependent data and present two applications to assessing financial market risk. Our method performs well in estimating Value at Risk and provides a superior alternative to Hill's estimator in operationalizing Safety First portfolio selection.     

Estimation of tail‐related risk measures in the Indian stock market: An extreme value approach

The purpose of the study is to estimate tail-related risk measures using extreme value theory (EVT) in the Indian stock market. The study employs a two stage approach of conditional EVT originally proposed by McNeil and Frey (2000) to estimate dynamic Value at Risk (VaR) and expected shortfall (ES). The dynamic risk measures have been estimated for different percentiles for negative and positive returns. The estimates of risk measures computed under different quantile levels exhibit strong stability across a range of the selected thresholds, implying the accuracy and reliability of the estimated quantile based risk measures.     

中国人口性别比偏高的成因与影响分析

中国的人口性别比自20世纪80年代已经超过106的警戒线,近十几年来婴儿出生性别比过高的趋势有进一步加剧的倾向。拟从影响人口性别比的三个方面即婴儿出生性别比、两性保存几率的差异和人口迁移,特别是婴儿出生性别比方面分析中国人口性别比偏高的形成原因以及可能带来的社会问题,并有针对性地提出解决人口性别比偏高问题的政策建议。