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1.
我国投资者会听话听音吗?文章利用文本分析方法,基于我国上市公司2005-2012年年度业绩说明会上的管理层语调数据对此进行了实证检验。研究发现,投资者对管理层的净正面语调做出了显著的正向反应,尤其是对负面语调做出了显著的负向反应。这表明在我国强调“意会”的语境文化背景下,投资者会听话听音,管理层语调具有信息含量,上市公司的业绩说明会具有其自身的存在价值。文章的研究结果还意味着,“词袋”方法及其构建的管理层语调用词列表在我国儒家文化背景下具有一定的适用性,值得开展进一步的研究。  相似文献   

2.
文章基于2010~2014年我国上市公司业绩说明会上的非财务信息披露数据,采用LSTM深度学习技术对管理层回复内容进行文本分析,考察管理层语意对未来股价崩盘风险的影响,以及投资者能否感知并发挥抑制未来股价崩盘风险的中介效应。研究发现,管理层语意越正向,越能化解未来股价崩盘风险,且这主要是通过投资者情绪所做出的积极反应所致。投资者能够明显感知管理层语意并修正其情绪偏差,化解未来股价崩盘风险,这说明投资者情绪在管理层语意和未来股价崩盘风险之间发挥了中介效应。本文的研究对于认识非财务信息在资本市场中的作用,以及规范非财务信息披露的内容和质量、抑制未来股价崩盘风险、促进资本市场健康有序发展具有重要的理论与实践意义。  相似文献   

3.
作为一项强有力的政府监管措施,政府审计的作用及有效性是一个重要的研究话题.文章利用2009-2015年审计署实施的中央企业审计事件,从公司股价崩盘风险角度,采用双重差分模型研究了政府审计的外部治理效应.研究发现,在政府审计实施后,被审计公司的股价崩盘风险显著下降.在一系列稳健性检验之后,上述结果依然存在.进一步研究表明,政府审计通过促使被审计公司及时披露负面信息,缓解了公司股价崩盘风险;此外,政府审计越频繁,其缓解股价崩盘风险的作用越强,而且政府审计还存在溢出效应,未被审计中央企业在审计事件发生后的股价崩盘风险也出现下降.文章对于评估和完善中国政府监管具有重要的理论与实践意义.  相似文献   

4.
本文采用2010年第1季度—2015年第3季度深交所上市公司作为研究对象,对“互动易”问答平台上企业与投资者沟通的内容与股价崩盘风险之间的关系进行了研究,具体而言,研究投资者提问以及董秘回复的负面语气是否能够降低相应公司股价崩盘风险。研究发现:首先,投资者提问的负面语气能够显著降低公司的股价崩盘风险,董秘回复的负面语气则与股价崩盘风险不相关。其次,机构投资者持股比例较高或持股户数较多的股票,公司股价崩盘风险与投资者提问的负面语气之间的负向关系更强。此外,进一步的分析表明,投资者提问的语气越负面,机构投资者下期的持仓越小,越倾向于卖出股票,且投资者提问的负面语气能够显著地降低信息不对称;投资者正面语气与股价崩盘风险之间不存在显著的相关性。本文为管理层与投资者信息交流机制方面的研究以及股价崩盘风险方面的文献提供了有益的补充。  相似文献   

5.
李青原  王露萌 《经济管理》2020,42(5):173-194
现有信息披露对资本市场影响的实证研究主要集中研究公司信息披露与自身股价之间的关系。本文对我国上市公司2007—2017年发布的业绩预告的信息外溢效应进行了检验,发现上市公司业绩预告对行业内其他公司的市场反应具有显著解释力,表明我国资本市场业绩预告存在信息外溢现象。并且,公司间会计信息可比性越高,外溢效应越显著,表明会计信息可比性促进了公司间的信息传递,对投资者股票交易具有决策参考意义。进一步检验发现,可比性对信息外溢效应的促进作用在市场竞争更激烈的公司中更为显著。此外,预告公司和非预告公司的信息环境对信息传递的影响有所差异。本文研究结论为我国资本市场外部性现象提供经验证据,对于信息披露质量要求以及披露监管政策研究具有启示意义。  相似文献   

6.
冯莉 《技术经济》2021,40(1):138-144
本文以“双康”事件(康美药业和康得新)为契机,研究重大违规事件的溢出效应,利用事件同行业和同地区上市公司为实验样本进行检验,结果表明:①当公司发生了重大违规行为后,导致同行业的上市公司股价会显著下降,而同地区上市公司受到的影响并不显著;②通过检验溢出效应的内在机制,本文验证了上市公司盈余质量是造成行业溢出效应的影响因素,盈余质量越低的上市公司受到的波动越显著;③在分组检验的结果中,本文证明股权集中度高和国有所有权的上市公司受到违规事件的影响更加显著.由此,意味着投资者在面对负面市场消息时可能会以会计信息为依据进行投资决策.所以,本文建议上市公司应该通过提升自身的会计信息质量从而降低负面事件的波动.  相似文献   

7.
媒体报道对资产定价具有重要影响,致使其日益受到公司管理层的重视.文章以2006?2014年民营企业IPO为样本,基于公司管理层经历或背景,研究高管政治关联对公司媒体披露的影响及其市场效应.研究发现:(1)高管政治关联有助于公司在IPO期间获得更高的媒体关注度和更正面的报道倾向;而且,政治关联层级越高,媒体报道对其越有利.(2)高管政治关联对媒体报道的影响主要通过非证监会四大信息披露媒体和地理邻近媒体来实现的;而地区制度环境可在一定程度上抑制高管政治关联对媒体报道的影响.(3)由政治关联所带来的媒体报道水平的改善,有助于促进IPO首日抑价的上升;但中长期会导致股价反转.文章不仅丰富了公司治理对媒体(信息)披露管理影响方面的文献,而且为民营企业的政商关系研究提供了新的经验证据.  相似文献   

8.
文章基于自媒体平台迅速发展的时代背景,研究自媒体信息披露对上市公司业绩预告的影响。利用Python爬取上市公司微博和微信公众号信息,使用PSM后对匹配的样本进行实证研究发现,自媒体信息披露会对上市公司业绩预告产生掩饰效应,导致业绩预告信息质量降低。并且随着资本市场业绩预期压力的增大,自媒体平台可以为管理层的遮掩行为提供便利渠道,从而在更大程度上导致业绩预告质量的降低。进一步分析发现,发生“业绩变脸”的公司会积极地通过自媒体渠道营造业绩攀升的良好氛围,以掩饰真实信息。公司的信息环境越差,即盈余激进度越大、盈余平滑度越大、透明度越低,越有动机通过自媒体平台分散投资者关注,从而减少业绩预告信息披露。研究从自愿性信息披露双渠道的视角出发,探讨企业利用自媒体进行信息披露的掩饰动机,从微观上证明了自媒体已成为操控性信息披露的渠道。  相似文献   

9.
用Baidu指数作为投资者"信息获取行为"的代理变量,以2007-2011年间的A股上市公司管理层业绩预告事件为样本,本文重点探讨中国投资者是否具有信息获取能力这一基本问题。结果表明,在"业绩预告"公布之前的四个交易日内,投资者的信息获取力度日益增加,并在预告公布当日达到顶峰,这在一定程度上证明了McNichols and Trueman(1994)关于"公开信息披露刺激投资者私有信息获取行为"的理论推断。本文接下来进一步探讨投资者的信息搜集活动是否影响到股价对业绩预告的反应。结果表明,随着"业绩预告"前投资者信息获取力度的增强,股价对"业绩预告"的即时反应却较弱。这说明,投资者的信息获取行为具有价格发现的作用,从而在一定程度上提前对"业绩预告"的信息作出反应。此外,本文还发现,随着投资者信息获取行为的增强,股票交易量也显著增加,从而呼应了信息获取影响股价变动的观点。基于此,本文认为中国投资者具有信息获取能力。  相似文献   

10.
基于投资者有限关注的视角,以中国上市公司2005-2012年业绩预告信息为样本,研究发现:上市公司业绩预告信息披露存在时机选择行为,相比业绩预告信息少日和其他周历,管理层更倾向于在信息多日和周五、周六发布坏消息业绩预告。这有助于分散投资者注意力,从而减少坏消息导致的股价波动。  相似文献   

11.
In Appl. Econ. Lett. 18 (2011), 1777–1784, as a natural generalization of some famous production models with two inputs, C.A. Ioan and G. Ioan introduced a new class of production functions with constant return to scale, called sum production function, and proved three theorems of characterization for such production models. In this article, we give new and more simple proofs of these theorems, extending also the results to the case of increased/decreased return to scale. The generalization to the case of an arbitrary number of inputs is also discussed.  相似文献   

12.
Refining an algorithm due to Koller, Megiddo and von Stengel, we show how to apply Lemke’s algorithm for solving linear complementarity programs to compute a quasi-perfect equilibrium in behavior strategies of a given two-player extensive-form game of perfect recall. A quasi-perfect equilibrium is known to be sequential, and our algorithm thus resolves a conjecture of McKelvey and McLennan in the positive. A quasi-perfect equilibrium is also known to be normal-form perfect and our algorithm thus provides an alternative to an algorithm by von Stengel, van den Elzen and Talman. For the case of a zero-sum game, we devise variants of the algorithm that rely on linear programming rather than linear complementarity programming and use the simplex algorithm or other algorithms for linear programming rather than Lemke’s algorithm. We argue that these latter algorithms are relevant for recent applications of equilibrium computation to artificial intelligence.  相似文献   

13.
The purpose of this paper is to analyze the optimal size of a residential area within a municipality under different market structures. We find that under a private duopoly the optimal size of the residential area depends on the ratio between transportation costs and a negative externality due to congestion. The optimal size is the whole municipality when the ratio is low enough and a small area of the municipality when the ratio is high enough. The transition from a flat residential area to a more compact one is not continuous, so some large-enough residential areas are never optimal. Under a mixed duopoly the transition from a flat residential area to a more compact one is continuous as the ratio increases. By comparing the two cases we find that for intermediate values of this ratio a flat city is optimal for a private duopoly while compact cities emerge under a mixed duopoly.  相似文献   

14.
In this paper, we study a monetary random-matching model where both goods and money are perfectly divisible, production is costly, and there is no exogenous upper bound on agents' money holdings, information on which is private to the agent. We show that there is a continuum of stationary equilibria where agents have either no money or a set amount, and buyers spend all their money. As in the previous studies, the equilibrium value function is step-like, which emerges as a self-fulfilling prophecy. The endogenous upper bound on agents' money holdings is the result of private information on agents' money holdings. Buyers post an offer that is accepted only by sellers without money, who set a higher value on money.  相似文献   

15.
The upsurge of patented fruit varieties developed by university plant-breeding programs motivated this re-examination of optimal commercialization strategies when an innovator cares about profits for both itself and the licensees. Our theoretical findings suggest that the optimal licensing arrangement that maximizes weighted joint profits depends on the innovation level size, number of firms, and the weights assigned to the innovator and licensee profits. We designed an experiment to test the case with a small number of firms and found that the joint profits are the greatest under an exclusive per-unit royalty scheme. However, when the number of firms is large, as may be the case for a varietal introduction into the U.S. apple industry, our model suggests that the joint profits will be the largest under a nonexclusive contract, either with a two-part tariff, if the innovation level is high, or a per-unit royalty if the innovation level is low.  相似文献   

16.
Over the last twenty years the statistical properties of inflation persistence has been the subject of intense investigation and debate without reaching a unanimous conclusion yet. In this article we attempt to shed further light to this debate using a battery of econometric techniques in order to provide robust evidence on the degree of inflation persistence and whether this has changed during the period in which several countries have followed inflation-targeting regimes or new monetary regimes. We consider the inflation rates of thirty developed and emerging economies using quarterly data for the period 1958 to 2007 which include alternative monetary policy regimes. The coefficient of the inflation parameter is estimated by Ordinary Least Squares (OLS), Autoregressive Moving Average (ARMA) and Autoregressive Fractionally Integrated Moving Average (ARFIMA) models. Furthermore, the grid-bootstrap Median Unbiased (MUB) estimator approach developed by Hansen (1999) is used to estimate the finite sample OLS estimates coupled with the 95% symmetric confidence interval. We also examine parameter stability of persistence coefficients by estimating a model with time-varying parameters.  相似文献   

17.
18.
加工贸易在促进贸易增长和创汇方面,发挥了不可替代的作用,但是实证分析发现加工贸易就业弹性不断减弱。我国各省市、各行业加工贸易所占比重以及增值率指标存在着很大的差别。影响加工贸易规模的因素分析表明,外商直接投资额、产业结构等变量与加工贸易规模呈现正相关关系。  相似文献   

19.
Robustness of a fixed-rent contract in a standard agency model   总被引:2,自引:0,他引:2  
Summary. It is well known that there are infinitely many incentive contracts that achieve the full information outcome in the standard agency model when the agent is risk-neutral. However, since Harris and Raviv (1979), the fixed-rent contract has been the focal point among those infinitely many first-best contracts. This paper examines whether the fixed-rent contract is robust or not in various circumstances.Received: 6 June 2002, Revised: 9 June 2003, JEL Classification Numbers: J41, D82.Correspondence to: Susheng WangThe first authors work was supported by the Brain Korea 21 Project in 2003, and the grant for the Reform of university Education under the Brain Korea 21 Project of S.N.U. in 2001.  相似文献   

20.
The idea that for small disturbances the full employment equilibrium is stable while for large disturbances it is unstable was coined by Leijonhufvud in the notion of a corridor. We discuss the existence of a corridor in the standard Keynesian-monetarist textbook macro-model. It turns out that though the full employment steady state of this model may be locally stable — which is the case when the well-known Cagan condition holds — the model is never globally stable. This is due to the inherent non-linearity in the demand for money function, arising from non-negativity of the nominal rate of interest. Thus, perhaps surprisingly, the Cagan condition is both necessary and sufficient for the existence of a corridor in the Keynesian-monetarist model.This note is adapted from a paper presented at the European Meeting of the Econometric Society, Bologna, August 1988. I would like to thank Søren Bo Nielsen and Peter Birch Sørensen (Copenhagen Business School), Thomas Lux (University of Bamberg), and two anonymous referees for helpful comments and suggestions. Remaining errors and shortcomings are mine.  相似文献   

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