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Communicating with employees is an aspect of management which is today being subjected to new pressures and ideas. Trade unions have new disclosure rights. A growing number of managers believe that employees have a right to know about company matters, or see employee communications as an essential adjunct to involving employees in managerial decisions through consultation or participation.

The purpose of this study is to examine the effectiveness of financial market rules in protecting minorities.

The study compares two alternative disclosure rules on insider trading, namely, the market abuse directive (Directive 2004/72/EC), inspired from the United State (US) insider trading regulation enacted by the Sarbanes–Oxley act and the transparency directive enacted by the European (Directive 2004/109/EC) dealing with the crossing of the shareholding threshold. To investigate which one is more effective in signaling reserved information, and thus in reducing information asymmetry, the authors run an event study on the French context, where both regulations are adopted. The data were hand collected from the French stock exchange securities commissions during the two years following the implementation of the two regulations in 2004. The final sample consists of 363 insiders trading and 35 crossing shareholding thresholds for 10 top French firms during the period 2006-2007.

The results show that the French market reacts significantly to insider trading, but poorly to the crossing shareholding thresholds. Abnormal returns are greater after insider purchases than after crossing up thresholds. These findings support the superiority of the insider disclosure regulation, as it has better information content and provides better protection to minorities.

The study contributes to the corporate governance literature by comparing two disclosure-trading policies. The authors conclude that regulation of disclosure of insider trading along the lines of US disclosure rules is more informative to the market and thus more relevant and important than disclosure of cross-threshold trades.

The study contributes to the corporate governance literature by comparing two disclosure-trading policies. The authors conclude that regulation of disclosure of insider trading along the lines of US disclosure rules is more informative to the market and thus more relevant and important than disclosure of cross-threshold trades. This finding can be helpful for the securities lawmakers and regulators in the process of insider trading law enforcement.

Previous researchers approached the question of insider trading focusing on the identity of insiders. In the research, the authors address the question from another perspective, namely, the crossing of thresholds. Another methodological contribution of the study is the use of a market model that incorporates GARCH (generalized autoregressive conditional heteroskedastic) effect and time-varying systematic risk parameter (β), which is recommended to tackle the classical event study problem of detecting the exact timing of the event.

This paper aims to measure the trade price impact of a recent regulatory disclosure intervention in municipal securities secondary markets, which required broker-dealers to disclose securities trading information on a near-real-time and continuing basis.

The author analyzes trade price outcomes in the preintervention and postintervention regimes using a suite of time series estimations that give heteroskedasticity-robust standard errors (Prais–Winsten and Cochrain–Orcutt), accommodate higher-order lag structure in the error term (autoregressive integrated moving average) and account for volatility clustering in the time series (generalized autoregressive conditional heteroskedasticity).

Results show that regulatory disclosure intervention significantly improved trade price efficiency in municipal securities secondary markets as daily trade price differential and volatility both declined market-wide after the disclosure intervention.

The sample consists of trades in State of California general obligation bonds; therefore, empirical findings may not be generalizable to other states, local governments and different types of bonds.

The findings highlight voluntary information disclosure as a practical and effective mechanism in disclosure regulation of municipal securities secondary markets.

Only a small body of work exists that examines information disclosure regulation in municipal securities secondary markets; therefore, this paper expands knowledge on the topic and should provide renewed impetus for regulatory efforts aimed at improving the efficiency of municipal capital markets.

This study investigates Asia Pacific banks' annual report disclosures on derivatives using the Basel Committee and IOSCO joint recommendations as the derivative and risk management disclosure benchmark. Based on our constructed disclosure index, the mean score is 35%, suggesting that many of the disclosure recommendations are not being adopted by the banks in our sample. Cross‐country and regional variation exists in the disclosure practices, with the variation associated with the extent to which accounting regulations for derivative instruments are operational. Hong Kong banks have the highest mean disclosure scores while the Philippines banks have the lowest mean disclosure scores. Australasian banks generally provide more disclosures than East Asian and South East Asian banks, and banks in developed countries generally have a higher level of disclosure relative to developing countries. The transparency of derivative activities by the banks is expected to improve as Asia Pacific countries promulgate accounting regulations congruent with international accounting standards.

The aim of this paper is to investigate the impact of voluntary disclosure on information asymmetry between investors and the average information content of subsequent the earnings announcement.

The authors use empirical methodology relying on multiple regression analyses. The authors estimate models of trading volume and stock returns around the earnings’ release date as a function of voluntary disclosures, measured using information in the 8-K statements.

Voluntary disclosures prior to the earnings release date increase trading volume related to stock returns. In addition, voluntary disclosures also reduce stock price movement around that date.

The results indicate that voluntary disclosures increase trading volume related to stock returns around the earnings release date. Such increases indicate increased differential precision among investors, demonstrating that voluntary disclosures increase differences in opinion among investors. The reduced stock price movement around the earnings release date also show that voluntary disclosures reduce the information content of earnings. One limitation is that the measure of voluntary disclosures does not consider the variation in the information content of individual disclosures.

Firms who make voluntary disclosures will need to carefully consider how to structure such releases to minimize asymmetry between investors. Investors should pay greater attention to finding out, and interpreting, voluntary disclosures by firms.

Regulators have previously expressed concern about leveling the playing field between more and less informed investors. The results showing increased differences in information as a result of voluntary disclosures provide valuable insights as regulators debate the balance of mandated and voluntary disclosure.

This is the first study to investigate the effect of voluntary disclosures on information asymmetry among investors using trading volume and, consequently, the first to find increased differences among investors that result from those voluntary disclosures. The paper is also the first to use a direct measure of voluntary disclosure developed by Cooper et al. to demonstrate the negative relation between voluntary disclosure and the average informativeness of earnings announcements.

This paper aims to investigate pre-disclosure information leakage by block traders and market reactions to disclosures of off-hours block trading compared to off-market trading.

Stock responses were analyzed based on timely disclosures regarding Korean firms’ decisions to dispose of their own shares to improve their financial structures.

The results showed that pre-disclosure abnormal returns were generated in off-hours block trading. In contrast, on disclosure days, the returns for off-hours block trading were significantly lower than those for off-market trading. It was consistent with prior studies, indicating that block traders were related to information leakage and caused moral hazard problems.

The comparison between off-hours block trading and off-market trading provides important insights regarding block traders’ behavior. This study’s findings on the leakage of information from block traders indicate the need for firms to exercise caution when using block traders.

This paper reports the results of the effects of the release, in the United Kingdom, annual reports and accounts (ARA), on security prices and trading volume of the U.K. firms. If the information reported in the annual reports and accounts (ARA) is relevant, the U.S. security market will respond to the release news through return and volume variances. Both signals are indicators of the relevance of the annual reports and accounts. The results of the analysis suggest the existence of unexpected returns to the annual reports and accounts and no corresponding U.S. trading volume response. The price results are in marked contrast to the findings of previous research that examined the information content of U.S. domestic annual reports, but do not detect a stock price response (e.g., Foster et al. 1986; Bernard and Stober 1989; Cready and Mynatt 1991). Our stock price analyses indicate that non‐U.S. GAAP accounting measures do not impede U.S investors' ability to use U.K. firms' ARA in valuing the sample firms. Indeed, U.S. investors use information from the ARA in their valuation of U.K. firms. Since trading responses to a disclosure are generally more easily detected than price responses (Cready and Hurtt 1999), these findings jointly suggest the provincial nature of the ARA release.

This paper aims to examine whether firms with high information asymmetry disclose more information under a continuous disclosure regime, and, second, the paper examines whether continuous disclosures reduce information asymmetry.

The study models relations between continuous disclosures and information asymmetry using ordinary least squares regression and two-stage least squares regression.

The study finds firms with high information asymmetry disclose more information. Further, the study finds that disclosure in the presence of high information asymmetry increases asymmetry. Finally, while bad news increases information asymmetry, the disclosure of firm-specific good and bad news is associated with reduced information asymmetry.

The paper identifies conditions under which Continuous Disclosure Regime increases information in markets and influences information asymmetry.

Institutional governance theory is used to explain voluntary corporate greenhouse gas (GHG) reporting in the context of a market governance system in the absence of climate change public policy. This paper seeks to hypothesise that GHG reporting is related to internal organisation systems, external privately promulgated guidance and EU ETS trading.

A two‐stage approach is used. The initial model examines whether firms' GHG disclosures are associated with internal organisation systems factors: environmental management systems (EMS), corporate governance quality and environmental management committees as well as external private guidance provided by the Global Reporting Initiative (GRI) and the Carbon Disclosure Project (CDP) for 187 ASX 300 firms. EU ETS trading is also included. Determinants of the extent and credibility of GHG disclosure is examined in the second stage where an index constructed from the GHG reporting standard “ISO 14064‐1” items for a sub‐sample of 80 disclosing firms as the dependent variable.

Firms that voluntarily disclose GHGs have EMSs (uncertified and certified), higher corporate governance quality and publicly report to the CDP, tend to be large and in the energy and mining and industrial sectors. The credibility and extent of disclosures are related to the existence of a certified EMS, public reporting to the CDP, and use of the GRI. Firms that disclose more credible information are more likely to be large and in the energy and mining, industrial and services sectors.

The paper shows that some proactive but pragmatic Australian firms are disclosing their GHGs voluntarily for competitive advantage in the current market governance system in the absence of public policy.

The purpose of this paper is to investigate whether disclosure as required by Islamic Financial Service Board Standard No. 4 (IFSB-4) influences information asymmetry among investors in the Gulf Cooperation Council (GCC) member countries. In addition, the paper investigates whether the influence of IFSB-4 on information asymmetry varies between Islamic and conventional financial institutions.

The paper tests the hypotheses using a sample of firms listed in the GCC over a period of 2000-2013. Ordinary least square regression and fixed-effects estimation techniques are applied to test the hypotheses.

The findings reveal that information asymmetry among investors is lower after the implementation of IFSB-4 than before, indicating that the standard has increased transparency. The results also reveal that information asymmetry after the implementation of IFSB-4 is lower for Islamic than for conventional financial institutions. This suggests that IFAB-4 promotes more transparency for Islamic than conventional institutions.

Owing to data availability, we were unable to use other proxies of information asymmetry, e.g. bid-ask spreads, and the level of disclosure, e.g. self-constructed disclosure index.

The paper concludes that disclosures under IFAB-4 reduce information asymmetry among investors. In this context, this study increases the awareness of standard setters academics investors regulators and many other stakeholders about the economic consequences of disclosure standards in the region.

This study takes a first step to fill evident gaps in the literature by investigating the influences of disclosure standard on information asymmetry in a unique setting that is often ignored by accounting researchers, which helps to widen our knowledge on accounting practices across the globe.