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1.
本文分别以1990年12月至2003年12月两市所有A股公司为抽样总体,检验了均值调整模型、市场调整模型和市场模型为基础的多种检验方法的检验力。研究发现,无论事件研究中各公司事件是否相近或重叠,都应采用市场模型为基础的非参数秩检验法。而累积非正常收益的检验也应以市场模型为计算基础。若样本公司事件日相近或重叠,统计量的设置要考虑累积非正常收益截面数据的相关性。均值调整模型在本文所定义的各种检验方法中,均无明显优势。经敏感性测试,本文结论不变。  相似文献   

2.
本文以2013年沪深两市的涉事公司为样本,采用事件研究法分析了国有上市公司和民营上市公司高管涉嫌犯罪等事件的市场反应。通过分析事件窗内个股的累积异常收益及显著性检验发现,在事件期[-10,10]共21个交易日内,国有上市公司样本通过了显著性检验,呈现出显著的负反应;而民营上市公司样本则未通过显著性检验。  相似文献   

3.
事件研究法 事件研究法是一种财务经验研究方法,是了解股票市场证券价格与特定事件(如公司股利宣告或盈余发布)间关联性的实证分析,其研究的逻辑线索简单明了,即用非正常收益(abnormal return)来判断某事件的发生是否影响了时序性价格数据的产生.若此事件显著,使该公司股价波动状况异于无此事件时的表现,则会产生非正常收益.而事件研究主要的目的在于利用统计方法检验非正常收益状况,借以明确该事件是否对公司股价造成影响.非正常收益是一个很重要的指标,用来度量股价对事件发生或信息披露异常反应的程度.实施事件研究可分成三步:  相似文献   

4.
本文通过有关我国上市公司的传闻消息对上市公司股价影响的实证分析,得出在消息公布日前2天以及后3天的时间段里,传闻消息对股价有正影响,从而给投机者带来了非正常收益,但是从长期来看,传闻消息不会给投资者带来任何非正常收益。另外,通过对各类传闻消息对股价影响的进一步分析,发现在诸类传闻消息中,主力类传闻对上市公司股价的影响最为显著,能给投机者带来很大的非正常收益。  相似文献   

5.
传统行业的盈利质量主要从盈利能力、持续性、盈利获现程度、成长水平等方面进行分析.互联网金融作为新兴产业,在盈利质量影响因素方面与传统行业有所区别.通过因子分析、主成分分析等方式对我国A股上市公司互联网金融概念板块进行盈利质量影响因素的数据分析,可以归纳出我国互联网金融行业盈利质量的影响因子.结果表明,我国互联网金融行业盈利质量可以分为四个独立的影响因子,具体可命名为:F1收益性因子、F2现金性因子、F3利润占比因子以及F4增长性因子.这四个影响因子累积解释了影响互联金融概念板块公司盈利质量中87.402%的信息,其中F1收益性因子最显著,解释了38.956%的信息.本文发现,企业资产收益能力对盈利质量影响最大,资产收益能力越强,影响效果越好.  相似文献   

6.
张炜 《财会学习》2016,(1):127-128
本文研究了2010-2012年中国A股上市公司总经理变更前后,不同所有制结构上市公司的实际会计业绩在总经理变更前后的变化.民营上市公司显著的业绩变化与市场对总经理变更显著的消极反应一致,而国有控股上市公司不明显的业绩下滑也与市场表现出的不显著为负的累计非正常收益相一致;在证券市场拥有负累计非正常收益的公司表现出较正累计非正常收益公司更差的会计业绩.  相似文献   

7.
2007年11月,我国正式颁布了《突发事件应对法》。根据该法,本文结合四川"5.12"汶川地震事件,主要探讨该法对政府与社会两方面的重大影响。  相似文献   

8.
本文以上市公司审计报告公告前后累计非正常收益作为市场认同的代理指标,运用最小二乘回归和二元选择回归模型考察上市公司相关审计选择行为与上市公司市场认同之间的相关性。实证结果显示,市场对上市公司审计机构的选择、审计机构数量的确定、审计意见类型和审计资费等行为的认同度不同。非正常审计费用和审计意见类型公告负向影响上市公司的累计非正常收益,审计机构的选择和审计机构的数量正向影响上市公司累计非正常收益处于正值区间的概率,而非正常审计费用则负向影响该概率。  相似文献   

9.
陈豪 《中国外资》2012,(8):209-211
本文采用事件研究法,分析了1998年至2009年间A股市场发生的533个控股权发生转移的并购事件中买方企业围绕首次公告日的短期收益。通过实证研究发现,在围绕并购首次公告日(-2天,2天)这5天的时间窗口内,并购买方企业的累积超额收益显著为正。本文还发现,账面市值比、交易相对规模等交易特征值与并购短期收益存在较强的相关性;而买方企业的规模、托宾q值、并购的股权收购比例、自由现金流与并购短期收益的相关性不显著。  相似文献   

10.
本文采用事件研究法,分析了1998年至2009年间A股市场发生的533个控股权发生转移的并购事件中买方企业围绕首次公告日的短期收益.通过实证研究发现,在围绕并购首次公告日(-2天,2天)这5天的时间窗口内,并购买方企业的累积超额收益显著为正.本文还发现,账面市值比、交易相对规模等交易特征值与并购短期收益存在较强的相关性;而买方企业的规模、托宾q值、并购的股权收购比例、自由现金流与并购短期收益的相关性不显著  相似文献   

11.

We propose a fully Bayesian approach to non-life risk premium rating, based on hierarchical models with latent variables for both claim frequency and claim size. Inference is based on the joint posterior distribution and is performed by Markov Chain Monte Carlo. Rather than plug-in point estimates of all unknown parameters, we take into account all sources of uncertainty simultaneously when the model is used to predict claims and estimate risk premiums. Several models are fitted to both a simulated dataset and a small portfolio regarding theft from cars. We show that interaction among latent variables can improve predictions significantly. We also investigate when interaction is not necessary. We compare our results with those obtained under a standard generalized linear model and show through numerical simulation that geographically located and spatially interacting latent variables can successfully compensate for missing covariates. However, when applied to the real portfolio data, the proposed models are not better than standard models due to the lack of spatial structure in the data.  相似文献   

12.

Recursive formulae are derived for the evaluation of the moments and the descending factorial moments about a point n of mixed Poisson and compound mixed Poisson distributions, in the case where the derivative of the logarithm of the mixing density can be written as a ratio of polynomials. As byproduct, we also obtain recursive formulae for the evaluation of the moments about the origin, central moments, descending and ascending factorial moments of these distributions. Examples are also presented for a number of mixing densities.  相似文献   

13.
The Japanese disclosure system of consolidated statements was introduced in 1977 and extensively revised in 1997. The role of the bureaucracy has been significant in these developments and seems to be part of Japan's closed culture. However, other explanations could also be applied. In particular, although Japanese firms opposed such disclosures on the basis of preparation costs, the Japanese government had to modernize the disclosure system, including consolidation, in order to develop the securities market regardless of an individual company's interests.  相似文献   

14.
After the Second World War, during the neutralization of the controlled economy of wartime Japan, a design for a Corporate Accounting Law was elaborated by the Investigation Committee on the Business Accounting System. The Investigation Committee tried to establish not only new business accounting standards but also a central and independent administrative organ of corporate accounting regulation on the basis of the Corporate Accounting Law. The Corporate Accounting Law was expected to lay the legal foundation of the new corporate accounting regulation regime in Japan. Nevertheless, even though the original design of the fundamental accounting law was never realized, it should be considered the starting point for our understanding of external accounting history in post-war Japan.  相似文献   

15.
This paper examines the way two accounting techniques, namely depreciation and foreign exchange, were deliberated on, between 1870 and 1900, in an Indian jute company whose shareholders resided in the UK. The arena for these deliberations was the conflictual relationship between controlling and non-controlling shareholders as to how best to account for depreciation and foreign exchange especially when the particular accountings affected distributional issues such as the dividend decision. The purpose of this paper is to analyse and explain the processes by which a company's accounting practices emerge and develop as a contest between different interests. Accounting framed the parameters of the deliberations and provided the language of power and dissent. The paper uses a rich archive that includes narrative and accounting material.  相似文献   

16.
Short selling may accelerate stock price adjustment to negative news. However, the literature provides mixed evidence for this prediction. Using short-sale refinancing and a staggered difference-in-differences (DID) model, this paper explores the effect of short selling on stock price adjustment. Our results show that (1) short-sale refinancing improves the speed of stock price adjustment to negative news. This result holds after we control for endogeneity. (2) The positive relationship between short-sale refinancing and stock price adjustment speed is significant in subsamples of stocks with higher earnings management or lower accuracy of analyst forecasts, indicating that firms with more opaque information are more likely to be targeted by short sellers. In subsamples of stocks with a higher ownership concentration or lower ownership by institutional investors, short selling is more likely to increase the speed of stock price adjustment, indicating that ownership structure may influence negative news mining. (3) As short-sale refinancing exacerbates the absorption of bad news by stock prices, it increases crash risk. This study enriches the research on the economic consequences of short selling and provides empirical evidence supporting regulations on short selling in China.  相似文献   

17.
正The China Journal of Accounting Research"CJAR"(ISSN 1755-3091)publishes quarterly.It contains peer-reviewed articles and commentaries on accounting,auditing and corporate governance issues that relate to the greater China region.We welcome the submission of both theoretical and empirical research papers pertinent to researchers,regulators and practitioners.Authors should note:1 Submissions must be original  相似文献   

18.

We introduce an expected utility approach to price insurance risks in a dynamic financial market setting. The valuation method is based on comparing the maximal expected utility functions with and without incorporating the insurance product, as in the classical principle of equivalent utility. The pricing mechanism relies heavily on risk preferences and yields two reservation prices - one each for the underwriter and buyer of the contract. The framework is rather general and applies to a number of applications that we extensively analyze.  相似文献   

19.
China’s slowing economic growth and rapid urbanization have made local government debt financing a significant issue.This study uses a sample of China’s provinc...  相似文献   

20.
The trading station or factory maintained by the Dutch East India Company (VOC) was Japan's sole window on the Western world during most of the Tokugawa period (1600-1868). While many aspects of the factory's role in Dutch/Japanese cultural exchange have been researched little is known in the West of the accounting at the factory. This paper considers the possibility that double-entry bookkeeping employed by the Dutch may have been diffused to the Japanese. The available evidence is synthesized after considering the accounting system in the Dutch factory.  相似文献   

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