贸易顺差、冲销操作和货币政策效应的非对称性

文章利用＂G—R＂模型和结构向量自回归模型,实证分析我国货币政策的独立性和非对称性,通过我国汇改前后的比较得出,汇改之前货币政策独立性小于汇改之后,但汇改后,为保持汇率稳定而进行的冲销操作在很大程度上削弱了我国货币政策的独立性。通过江苏、山东和四川三省的实证分析得出,货币政策效应存在明显的区域差异。     

Big Five Audits and Accounting Fraud*

We examine the association between Big Five audits and the incidence of accounting frauds allegedly committed by U.S. public companies between 1981 and 2001. Many commentators argue that the prominent financial reporting failures that led to major corporate governance reforms cast serious doubt on whether the large public accounting firms continue to supply relatively high‐quality audits, especially in recent years. However, in unmatched and matched samples, we provide strong, robust evidence that fraudulent financial reporting becomes less likely with the presence of a Big Five auditor. Importantly, time‐series tests suggest that the Big Five are consistently associated with a lower incidence of fraudulent accounting, including in the last five years of our sample period when the number of frauds soared. Moreover, we find evidence implying that these relations are causal rather than an artifact of endogeneity in auditor choice.     

Creditors’ and Shareholders’ Reporting Demands in Public Versus Private Firms: Evidence from Europe*

In this study we investigate whether the importance of accounting information in contracting and communication with shareholders and creditors affects earnings timeliness in publicly disclosed general‐purpose financial statements. To operationalize the relationship between timeliness demands and the importance of accounting information to shareholders and creditors, we compare the (asymmetry in) earnings timeliness of public firms with that of private firms. We attribute public versus private firm differences in timeliness to shareholders’ demands when a country’s institutions provide strong investor protection. Similarly, we attribute these differences to creditors’ demands when the institutions provide strong creditor protection. Our analysis of public and private firms in 13 Western European countries suggests that creditors and shareholders have different timeliness demands. In particular, we find that the public versus private firm difference in asymmetric timeliness is not associated with a country’s degree of investor protection but positively associated with a country’s degree of creditor protection. The results further suggest that shareholders demand symmetric rather than asymmetric timeliness. An important implication of our study is that general‐purpose financial statements are responsive to creditors’ reporting demands, which contrasts with the idea that these — primarily private — creditors would use special‐purpose reports.     

民航空——地通信系统的新进展

在国际民航组织的通信导航监视／空中交通管理系统中，空－地通信系统是其重要组成部分和基础。本文对民航空－地通信作一综合性介绍，指出现行系统的缺点和局限性，阐述未来系统的需求和发展方向。     

Trading frequency and volatility clustering

Volatility clustering, with autocorrelations of the hyperbolic decay rate, is unquestionably one of the most important stylized facts of financial time series. This paper presents a market microstructure model that is able to generate volatility clustering with hyperbolically decaying autocorrelations via traders with multiple trading frequencies, using Bayesian information updates in an incomplete market. The model illustrates that signal extraction, which is induced by multiple trading frequencies, can increase the persistence of the volatility of returns. Furthermore, we show that the volatility of the underlying time series of returns varies greatly with the number of traders in the market.     

Do controlling shareholders' expropriation incentives imply a link between corporate governance and firm value? Theory and evidence

We develop and test a model that investigates how controlling shareholders' expropriation incentives affect firm values during crisis and subsequent recovery periods. Consistent with the prediction of our model, we find that, during the 1997 Asian financial crisis, Asian firms with weaker corporate governance experience a larger drop in their share values but, during the post-crisis recovery period, such firms experience a larger rebound in their share values. We also find consistent evidence for Latin American firms during the 2001 Argentine economic crisis. Our results support the view that controlling shareholders' expropriation incentives imply a link between corporate governance and firm value.     

Market fragility and international market crashes

We extend the Pukthuanthong and Roll (2009) measure of integration to provide an estimate of systemic risk within international equity markets. Our measure indicates an increasing likelihood of market crashes. The conditional probability of market crashes increases substantially following increases of our risk measure. High levels of our risk measure indicate the probability of a global crash is greater than the probability of a local crash. That is, conditional on high levels of systemic risk, the probability of a severe crash across multiple markets is larger than the probability of a crash within a smaller number of markets.     

The effect of reference point prices on mergers and acquisitions

Prior stock price peaks of targets affect several aspects of merger and acquisition activity. Offer prices are biased toward recent peak prices although they are economically unremarkable. An offer's probability of acceptance jumps discontinuously when it exceeds a peak price. Conversely, bidder shareholders react more negatively as the offer price is influenced upward toward a peak. Merger waves occur when high returns on the market and likely targets make it easier for bidders to offer a peak price. Parties thus appear to use recent peaks as reference points or anchors to simplify the complex tasks of valuation and negotiation.     

Public market staging: The timing of capital infusions in newly public firms

We examine financing activities of newly public firms for evidence on capital staging in the public equity market. Staging (sequential financing) can increase issuance costs but can limit costs associated with overinvestment. We find evidence consistent with the hypothesis that staging is employed to help control the overinvestment problem in public firms. Initial public offering (IPO) proceeds, relative to external financing requirements, are smaller for firms with more intangible assets and more research and development (R&D)-intensive firms. Asset intangibility and R&D intensity are also both negatively related to the length of time from a firm's IPO to its first post-IPO capital infusion.