投资者个体的羊群行为:分布及其程度——基于分割聚类的矩阵化方法

现有研究的一个重要缺陷是无法精确地描述交易者个体羊群行为的分布及其程度,本文依据LSV及其衍生模型的思路,提出了基于分割聚类的矩阵化改进模型,并针对我国机构投资者,使用该改进模型对我国开放式基金的羊群效应进行了检验,结果发现:机构投资者个体的羊群效应分布呈现尖峰左偏的非标准形态;机构投资者在交易大盘股时的羊群效应比较明显;市场整体的羊群效应震荡增加;机构投资者个体的羊群行为会增加其投资时的收益和风险。     

投资者个体的羊群行为：分布及其程度--基于分割聚类的矩阵化方法北大核心CSSCISSCI

现有研究的一个重要缺陷是无法精确地描述交易者个体羊群行为的分布及其程度,本文依据LSV及其衍生模型的思路,提出了基于分割聚类的矩阵化改进模型,并针对我国机构投资者,使用该改进模型对我国开放式基金的羊群效应进行了检验,结果发现:机构投资者个体的羊群效应分布呈现尖峰左偏的非标准形态;机构投资者在交易大盘股时的羊群效应比较明显;市场整体的羊群效应震荡增加;机构投资者个体的羊群行为会增加其投资时的收益和风险。     

中国股市个体投资者羊群行为影响因素分析

中国股市投资者表现出显著的羊群行为,心理因素是投资者羊群行为产生的主要原因,情绪、股票历史收益率和股票规模等也是影响投资者行为的重要因素。本文利用我国股市个体投资者交易数据,对影响投资者羊群行为的因素进行了实证研究,探讨了我国股市个体投资者羊群行为的特征。     

高组织社会化能否促使员工进谏——基于新进税务人员的混合研究

以新进税务人员为被试样本,建构组织社会化、核心自我评价、心理授权与进谏行为之间关系的理论模型,并检验组织社会化、核心自我评价、心理授权与进谏行为混合作用的内在关系.研究表明,组织社会化有助于新进税务人员进谏行为的产生;心理授权在显著影响新进税务人员进谏行为的同时具有显著的中介效应,且有调节的中介效应显著;核心自我评价显著影响进谏行为,在具有显著的调节效应的同时还具有显著的中介调节作用.研究证明,混合效应模型能更好地解释组织社会化对进谏行为的作用机理,同时也拓展了组织行为学相关理论的研究角度.     

高组织社会化能否促使员工进谏——基于新进税务人员的混合研究北大核心CSSCI

以新进税务人员为被试样本,建构组织社会化、核心自我评价、心理授权与进谏行为之间关系的理论模型,并检验组织社会化、核心自我评价、心理授权与进谏行为混合作用的内在关系。研究表明,组织社会化有助于新进税务人员进谏行为的产生;心理授权在显著影响新进税务人员进谏行为的同时具有显著的中介效应,且有调节的中介效应显著;核心自我评价显著影响进谏行为,在具有显著的调节效应的同时还具有显著的中介调节作用。研究证明,混合效应模型能更好地解释组织社会化对进谏行为的作用机理,同时也拓展了组织行为学相关理论的研究角度。     

IASB新提议的金融负债公允价值变动损益列报形式能够消除反直觉效应及投资判断偏误吗?——基于个体投资者的实验证据

在IASB现行关于金融负债的准则下,由公司信用风险变动引起的金融负债公允价值变动损益列报形式会产生反直觉效应,并容易使投资者出现投资判断偏误。为了改变这一状况,IASB在其发布的征求意见稿中提出了新的列报形式。本文基于心理和行为的视角,采用实验研究方法,分析和检验了IASB新提议列报形式的有效性。研究发现,IASB新提议的列报形式,消除了原列报形式给个体投资者造成的反直觉效应及其引起的投资判断偏误。研究还发现,个体投资者对公司管理层胜任能力的评价,完全中介了金融负债公允价值变动损益列报形式和信用风险变动对个体投资者的市盈率评价的影响;个体投资者的市盈率评价又部分中介了个体投资者的管理层胜任能力评价与个体投资者的投资吸引力评价之间的关系。     

生活态度、生理健康与老年人社区服务需求

本文基于2012年中国老年社会追踪调查(CLASS)数据,应用因子分析方法实证分析了生活态度、生理健康与老年人社区服务需求的关系。研究结果表明:生活态度对老年人社区服务需求有显著的负向影响,其中老年人对自己生活满意度的主观评价以及与他人生活的对比评价对其社区服务需求的影响较大;生理健康对老年人社区服务需求有显著的负向影响,这种负向影响更多地表现在老年人现在的身体状况能否做家务上;生理健康负向调节生活态度与老年人社区服务需求的作用关系;生理健康比生活态度对老年人社区服务需求的影响程度大;生活态度、生理健康对不同个体特征群体的老年人社区服务需求的影响程度存在差异,但均有显著影响。     

浅谈股票型基金的羊群效应

股票型基金在我国证券市场上起者举足轻重的作用,然而股票型投资基金发挥重大作用的同时,也具有非理性."羊群效应"就是一种非理性行为.本文时股票型基金的羊群行为的成因做了分析,并提出了相关对策,为投资者和金融管理部门等经济主体对基金的"羊群效应"提供建议.     

基于高频数据的我国股市羊群效应研究

行为金融理论将投资者受自身心理因素、其他投资者的交易行为和外部环境等影响而表现出的跟风投资行为称为羊群行为，大量个体的羊群行为现象被称为羊群效应。虽然羊群效应短期内增强了股票的流动性，但易导致股价严重偏离潜在价值，诱发股价异常波动、股市崩盘，甚至股灾。文章基于2018年我国453个股指的分时高频数据，建立CCK模型，研究发现：我国股市存在短期、非对称的非理性羊群效应。基于此，提出提高股市定价效率和促进市场平稳运行的建议。     

投资者情绪、企业投资行为与资源配置效率

基于中国资本市场的经验数据,文章实证研究了投资者情绪对企业投资行为影响的经济后果。结果发现,投资者情绪与企业过度投资显著正相关,而与投资不足呈显著的负相关关系;投资者情绪的冲击对企业当前和未来绩效的影响表现为"正向影响——负向影响——逐渐消退"的过程。这意味着,在中国资本市场中,投资者情绪对资源配置效率具有"恶化效应"与"校正效应"的两面性,而其"总体效应"表现为资源配置效率的降低。上述研究发现对于深入理解投资者情绪影响对企业投资行为所产生的经济后果具有重要意义,也有助于我们从微观企业的视角反思金融危机对实体经济的影响。     

Debt and Taxes and Uncertainty

With a graduated personal tax schedule, Miller showed that there could be an equilibrium debt supply for the corporate sector as a whole. In the presence of uncertainty there is also a unique debt/equity ratio for each individual firm, and this ratio is related to the firm's operational risk characteristics. However, if firms merge and spin off in response to tax incentives, the identity of firms is ambiguous and only the corporate sector is a meaningful construct. These arguments are developed in both discrete and continuous models that employ extensions of the arbitrage-free pricing theory.     

教育与资本怎样的前景怎样的现实

来自政府的声音: "动员各种社会资源,发展教育" 此次论坛上财政部长助理张少春的发言是最受关注的发言之一.他的演讲传达出的信息有这样几方面:第一,谈到现实,他认为全社会对教育的巨大需求与我国公共投入不足已成为我国教育事业发展的突出矛盾.近年来,以公共部门投入为主,多渠道筹措教育经费的教育投入机制成为解决这一问题的重要途径,也使得公共部门与私营部门在教育领域的合作日益密切.第二,谈到前景,他认为,1.中国经济持续、快速的增长对高技能人才产生巨大的需求,这为私营部门的参与提供了广阔空间.2.随着公共财政职能的不断完善,财政资金将在各项教育事业中重新进行分配,进一步优化财政支出结构,提高资金的使用效率.在"十一五"期间,我国将把公共支出的重点转移到农村.我们将逐步把全体农村适龄儿童的义务教育全部纳入公共财政体制.     

Director gender and mergers and acquisitions

Does director gender influence CEO empire building? Does it affect the bid premium paid for target firms? Less overconfident female directors less overestimate merger gains. As a result, firms with female directors are less likely to make acquisitions and if they do, pay lower bid premia. Using acquisition bids by S&P 1500 companies during 1997–2009 we find that each additional female director is associated with 7.6% fewer bids, and each additional female director on a bidder board reduces the bid premium paid by 15.4%. Our findings support the notion that female directors help create shareholder value through their influence on acquisition decisions. We also discuss other possible interpretations of our findings.     

Political corruption and mergers and acquisitions

This research examines the relation between political corruption and mergers and acquisitions (M&As). We find that local corruption increases firm acquisitiveness but decreases firm targetiveness. The levels of corruption in acquirer areas relate positively to the bid premiums and negatively to the likelihood of deal completion. Corruption motivates acquiring firms to use excess cash for payment, which mitigates the negative effect of corruption on acquirer shareholder value. The evidence indicates that acquisitions help acquiring firms convert cash into hard-to-extract assets and relocate assets from the high to low corruption areas, thereby shielding their liquid assets from expropriation by local officials.     

East and west and north and south : A preliminary model

The Brandt report and other proposals for a new North-South world order continue to be the focus of lively debate, yet it is often argued that little concrete has emerged from their recommendations. A major reason for this, the author argues, is that the East-West conflict component is not sufficiently taken into consideration-East-West tensions are a severe constraint on and a determining factor of North-South relations. Using influence diagrams, the author develops a flexible framework for discussion and assessment of N/S-E/W relations.     

Trust and cross-border mergers and acquisitions

A number of studies suggest that social trust matters for investment. Using different measures of trust from World Values Survey, we show that countries where people display higher levels of trust engage in more cross-border M&A activities. When they do, these acquirers pay lower premiums. To the extent that these acquirers also tend to engage in larger acquisitions as well, our findings suggest that a larger selection pool of potential targets and higher value targets enable these acquirers to negotiate for lower premiums. We do not find evidence of the significant effect for target country trust levels. Hence, trust may benefit those acquiring firms in cross-border transactions.     

Tournament-based incentives and mergers and acquisitions

This research examines the relation between tournament-based incentives, which are proxied by the difference between a firm's CEO pay and the median pay of the senior managers, and mergers and acquisitions (M&As). We find that tournament-based incentives are positively related to firm acquisitiveness and acquiring firms' stock and operating performance. Further analysis indicates that positive acquisition performance increases the likelihood of the CEO being promoted from inside the acquiring firm. Our evidence is consistent with the view that tournament-based incentives motivate acquiring firms' managers to make greater efforts and take more risk that result in superior acquisition performance.     

Corporate Innovations and Mergers and Acquisitions

Using a large and unique patent‐merger data set over the period 1984 to 2006, we show that companies with large patent portfolios and low R&D expenses are acquirers, while companies with high R&D expenses and slow growth in patent output are targets. Further, technological overlap between firm pairs has a positive effect on transaction incidence, and this effect is reduced for firm pairs that overlap in product markets. We also show that acquirers with prior technological linkage to their target firms produce more patents afterwards. We conclude that synergies obtained from combining innovation capabilities are important drivers of acquisitions.