从国营到国有——国家股转让效果分析

本文系统地研究了从1997年到2000年在上海证券交易所和深圳证券交易所发生的国有资产局将控制权转让给国有独资企业和国有法人企业的案例数据。研究发现国家股控制权转让后公司业绩有了明显的改善,同时证券市场对国家股转让行为做出了积极的反应,产生了明显的超额收益。     

Return and risk in initial public offerings of both shares and warrants

In the past few years there has been an increasing number of new issues of shares of common stock together with warrants intended to raise interest in initial public offerings of relatively young, growing firms. In this study we examine the pricing efficiency of stocks and warrants offered simultaneously to the public as a single unit. We present a model for evaluating the warrants in such offerings and test it empirically against data from the Tel-Aviv Stock Exchange, where such offerings have become standard. We find that the issued units are usually undervalued, allowing for significant abnormal positive returns. But, while the warrants are usually underpriced, the stocks are overpriced. Largely consistent with the evidence from other financial markets around the world, we also find abnormal negative rates of return in the long run.     

股票价格均值回归理论研究综述

随机漫步理论认为股票的价格是不能预测的,许多实证检验的结果也支持了这一结论。但是,近年来均值回归理论对随机漫步理论提出了挑战。从长期来看,股票价格呈均值回归是必然的;均值回归具有不对称性;政府行为对股票的均值回归具有一定的影响。     

混合所有制改革、国有股比例与企业价值

本文选取2014～2019年我国A股国有上市公司为研究对象,探讨了混合所有制改革与国有股比例对企业价值的影响.结果表明,实行了混合所有制改革的国有企业,其企业价值会显著提高,国有股比例与企业价值之间存在倒"U"型关系,进行混合所有制改革的国有企业的国有股比例存在阈值效应,且阈值为28.65％.因此,政府需继续鼓励非国有...     

上市动机、投资者情绪与首次公开募股市场收益

文章以发行人筹资收益最大化为假设,对市场热季周期下发行人、承销商与投资人三者之间的博弈过程以及投资者情绪对首次公开募股(IPO)市场定价的影响机制进行研究.研究结果表明,发行人最优发行数量小于市场需求数量、承销商定价低于市场需求价格的目的在于确保发行成功和获取日后收益;投资者高亢的投资情绪可以对IPO市场短期收益正偏和长期收益负偏成为普遍现象进行解释.     

Cost-effective compensation to avoid carbon emissions from forest loss: An approach to consider price-quantity effects and risk-aversion

Analyses were carried out on financial compensation to avoid loss of tropical forests and related carbon (C) emissions when marginal financial yield declined for land-use options with extended areas, and when a risk-averting perspective (modeled according to financial theory around the capital asset pricing model) is assumed. The approach in this study was to consider natural forest, forest plantation, pasture, and cropland simultaneously to investigate how an optimized land-use distribution may reduce the amount of compensation necessary to avoid C emissions from forest loss.The financial compensations derived were as high as US$ 176 per hectare per year when comparing natural forests only with the most profitable alternative (croplands). However, compensation decreased to US$ 124 for risk-neutral decision-makers, who would strive for optimized land-use allocation, and to only US$ 47 per hectare per year for risk-avoiders, who would look to maximize the reward-to-variability ratio. Sensitivity analyses indicated that the compensation under risk-aversion increased much less than under risk-ignoring when increased productivity of agricultural land-use or growing demand for agricultural products was simulated. It was concluded that considering appropriate diversification strategies and the well documented human behavior to avoid risks is an important step in developing cost-effective compensation policies.     

发展农地规模经营的现实必要性及路径选择

当前土地细碎化造成的农业生产低效率,农村精壮劳动力转移造成的农业劳动力流失,农业劳动力代际传承的断裂以及发展低碳农业经济等均需要发展农地规模经营,但是农地产权不明确、土地流转利益协调困难、农村社会保障不健全等阻碍了农地规模经营的实现。我国有些地方的实践证明股份合作制很好地克服了农地规模经营所遇到的困难,股份合作制度是实现农地规模经营的可行选择,但是在进一步发展股份合作制时,需坚持因地制宜、各方主体准确定位、切实维护妇女土地权益、完善农村社会保障制度、坚持农地农业经营等原则。     

国有企业双重目标与投资效率改进——基于独立董事网络和国企混改视角

立足国有企业具有社会和经济双重目标的理论逻辑,本文选取2007~2016年A股国有上市公司作为研究样本,分析了独立董事网络和国有股比例对投资效率的影响以及调节效应。研究发现:独立董事网络降低了国有上市公司的投资效率,较高比例的国有持股抑制了投资效率,但当国企更加关注经济目标时,则有助于改善投资效率;进一步研究发现,相比于特定功能类企业,独立董事网络在商业竞争类企业中发挥投资效率的改善作用更加显著。因此,独立董事应因地制宜在国企中发挥治理作用;政府应分类推进国企混合所有制改革;竞争性国企应引入较大比例的优质民营资本,优化投资决策、提高投资效率。     

汇金公司增持四大国有商业银行对A股市场的影响——基于市场数据的比较分析

汇金公司作为国有重点金融企业出资人,在证券市场极度低迷时增持四大国有商业银行股份有利于维护市场信心,稳定国内金融形势。通过事件分析法对汇金公司增持公告前后上证指数收益率进行分析,结果表明增持短期提升了上证指数累积非正常收益率,但A股市场对增持的反应程度依次递减。此外,采用邹至庄突变点检验结果表明增持公告短期对上证指数造成了明显冲击,成为市场收益的一个突变点,但并不能影响股市中长期的趋势。由于汇金公司持股比例已经非常高,进一步增持空间有限,因此未来稳定A股市场的手段应该更加多样化,不能仅靠单一的增持。     

股权分置改革视角下独立董事对议案事项监督机制研究

采用2005—2014年我国上市公司独立董事对议案事项意见的独特数据,从明确监管议案事项、非明确监管事项和股权分置改革等三方面深入考察其对独立董事出具否定意见的影响。研究发现,在我国上市公司中,对明确监管议案事项出具否定意见概率低,说明“逆淘汰”机制和“任人唯亲”董事会文化的存在使得监督效果大打折扣。同时发现,在股权分置改革后,独立董事对议案事项出具否定意见概率更低;出于规避法律风险的考虑,独立董事对明确监管事项出具否定意见的概率相对较高。因此,监管层应加强对各类议案事项检查力度而非仅仅明确监管事项;科学厘清独立董事在董事会决策中的责任边界,明确独立董事承担的法律风险。