Discussion of “How Banks' Value-at-Risk Disclosures Predict their Total and Priced Risk: Effects of Bank Technical Sophistication and Learning over Time”

Liu et al. (2004, this issue) show that technical sophistication and learning over time help improve the ability of bank trading portfolios' value-at-risk (VaR) disclosures to predict future trading income risk, and that trading VaRs predict bank-wide total risk and systematic risk. While the results suggest that VaRs are a reliable measure of risk for the sample firms, the study's incremental contribution is limited because of the nature of the sample firms and problems in variable measurement.     

推动我国税务代理业发展的思考

我国法制建设的不完善、税务代理机构行为的不规范、税制结构的不完善以及执法刚性的不足等因素制约了我国税务代理的发展,为了推动我国税务代理事业的发展,应该采取以下措施:健全税务代理制度,提高法律级次;明确执业范围,强化管理手段,规范税收代理执业行为;完善税制结构,强化依法治税的社会环境;加强对税务代理市场的培育。     

船舶评估重置全价的确定

由于船舶资产专业性强,在评估该类资产时,评估人员因知识面限制,对如何确定船舶重置全价常感到无所适从.尤其对大型船舶,因涉及商业机密,无法进行直接询价,即便询到价格,其准确度也无从把握.本文详细介绍了船舶资产重置全价应包含的内容及确定过程,供评估人员在有关工作中参考.     

土地面积和地价单位换算的简便方法

由于历史原因,我国土地面积的计量单位在不少场合仍沿用"亩"这个单位.基准地价也往往用"万元/亩"作单位.但我国土地面积的法定计量单位是"平方米".土地面积单位在"亩"与"平方米"之间以及地价在"万元/亩"与"元/平方米"之间的换算,还是土地价值评估中经常要遇到的事情.     

Politically connected boards,value or cost: evidence from a natural experiment in China

This study investigates the net effect of a politically connected board for a firm. Using a natural experiment in China – a regulatory change to forbid bureaucrats from sitting on the board of public firms – we address the causality of the net effect of a politically connected board by testing the market reaction of the shares of firm targeted by the regulatory change to the policy announcement. The stocks of firms with politically connected directors who are targeted by the regulatory change show on average a significantly positive abnormal return, which suggests that the agency cost effect of a politically connected director dominates the value effect. The result is robust to various model settings and to a matched sample using the propensity score methodology. Additionally, the announcement effect of the resignation of a politically connected director is significantly positive, and significantly higher than that of a non‐connected director. Overall, our results suggest that the agency cost effect of a politically connected director dominates the value effect.     

区域一体化有利于减排吗？

将环境污染视作非期望产出,在一个拓展的增长收敛框架下讨论了区域一体化的环境效应及其理论机制。基于2003-2014年长三角城市群和珠三角城市群的数据,构建了一个测度区域一体化的新方法,运用工具变量法和双重差分法估计了跨省城市一体化和省内城市一体化对污染排放强度收敛的影响。实证结果显示:区域一体化显著促进了城市间污染排放强度的收敛并有利于减排,且近年来这种减排效应愈明显。污染排放强度呈现出条件收敛特征,经济增长收敛是污染排放收敛的重要原因。中国应利用好区域一体化促进地区协调发展和减排的双重政策红利,进一步促进区域一体化和同城化,大力发展城市群经济,构建城市间共生互利的发展格局,实现共同减排。     

Learning minimum variance discrete hedging directly from the market

Option hedging is a critical risk management problem in finance. In the Black–Scholes model, it has been recognized that computing a hedging position from the sensitivity of the calibrated model option value function is inadequate in minimizing variance of the option hedge risk, as it fails to capture the model parameter dependence on the underlying price (see e.g. Coleman et al., J. Risk, 2001, 5(6), 63–89; Hull and White, J. Bank. Finance, 2017, 82, 180–190). In this paper, we demonstrate that this issue can exist generally when determining hedging position from the sensitivity of the option function, either calibrated from a parametric model from current option prices or estimated nonparametricaly from historical option prices. Consequently, the sensitivity of the estimated model option function typically does not minimize variance of the hedge risk, even instantaneously. We propose a data-driven approach to directly learn a hedging function from the market data by minimizing variance of the local hedge risk. Using the S&P 500 index daily option data for more than a decade ending in August 2015, we show that the proposed method outperforms the parametric minimum variance hedging method proposed in Hull and White [J. Bank. Finance, 2017, 82, 180–190], as well as minimum variance hedging corrective techniques based on stochastic volatility or local volatility models. Furthermore, we show that the proposed approach achieves significant gain over the implied BS delta hedging for weekly and monthly hedging.     

Risk Awareness of Interpersonal Trust and Entrepreneurship in China: Evidence from Survey Data

This paper aims to build a theoretical framework for the influence of risk awareness of interpersonal trust (RAIT) on entrepreneurship, and explores the influence of RAIT on entrepreneurship with the micro survey data from the Chinese General Social Survey (CGSS) 2010–2013. The study found that, individuals with higher level of RAIT, their probability of starting new business will increase significantly, and with every increase of RAIT level, the probability of business venturing increase almost 4.0%. No mediation effects of information screening and cooperative mechanism are found in the relationship between RAIT and entrepreneurship. Moreover, during the venturing process, risks accompanying interpersonal trust cannot be reduced by social input; the reduction occurs only in eastern China where the economic system and the industrial development standards are more comprehensive and mature. This paper contributes to the literatures in the following two areas: it provides new evidence on how to deal with risks in the entrepreneurship process that accompanying interpersonal trust; meanwhile, it provides an explanatory mechanism on how the risk awareness affects business venturing.     

京津冀生态涵养区生态与产业协调发展影响因素分析

[目的]京津冀协同发展国家重大战略将冀北地区的发展确定为承担生态保障与水源涵养功能,文章基于长期以来该区域生态脆弱、经济落后的特征,研究了该生态涵养区生态与产业协调发展的影响因素,目的是为该区域生态建设与产业经济协调发展提供参考。[方法]设置了影响生态建设与产业经济协调发展的规模因素、经济因素、社会因素与政策因素四大类37个影响因素,借助于统计数据,在对数据进行标准化处理的基础上,应用计量经济模型,通过因子分析法将各个因素进行分类归纳为5个公因子,利用SPSS软件回归模拟结果显示各个因素对生态建设与产业经济协调发展的影响作用。[结果]将四大类通过因子分析法的主成分分析,应用计量经济模型模拟,拟合优度较高,影响因素通过分组具有较强的解释力,结果能够很好地反映这些影响因素对生态建设与产业经济协调发展的影响方向与影响程度。[结论]依据定性分析假设与计量模拟分析结果,针对存在的问题与发展机遇,提出对策建议:继续加强生态建设项目的推进、适度扩大产业经营规模、加大生态建设与产业发展投资力度、实施资源节约型生产创新模式以及健全和完善生态与经济协调发展制度。