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The aim of this paper is to investigate the effect of management earnings forecasts on the level of information asymmetry around subsequent earnings announcement.

Employing the adverse selection cost method suggested by George et al., the paper compares for each sample firm the adverse selection cost around earnings announcement in forecasting years with that in non‐forecasting years.

Consistent with Diamond and Verrecchia is the finding that the earnings announcement in non‐forecasting years decreases information asymmetry during a three‐day announcement period and increases in a post‐announcement period up to seven days. No significant change in information asymmetry between pre‐ and post‐announcement periods when firms released a “good” news forecast is found. The firms that previously released a “bad” news forecast experience a significantly lower information asymmetry than those that did not forecast during announcement or post‐announcement days, and experience a decrease in information asymmetry in a five to seven‐day post‐announcement period.

This paper provides the first empirical reports on the different information asymmetry changes around earnings announcements followed by a “good” news management forecast from those followed by a “bad” news forecast.

In a recent article Aharony and Swary considered the synchronous nature of earnings and dividends announcements in examination of the information content of dividend hypothesis. They concluded that their results support the information content of dividends hypothesis—that announcements of changes in dividends provide information beyond that contained in quarterly earnings announcements. A shortcoming of the Aharony and Swary study is that it considers only dividend and earnings announcements that occur at least 11 trading days from each other. In fact, as their Table I indicates the majority of such pairs of announcements occur within ten days of each other. Further, approximately one‐half of their observations of earnings and dividends announcements are separated by at least 21 trading days (close to one calendar month). These considerations lead one to wonder how synchronous their announcements are and whether their results can be generalized to earnings and dividend announcements that actually occur in close proximity to each other.

The effect of layoff announcements on the shareholder returns of 154 firms that announced layoffs in 1993‐1994 was examined with event study methodology. As expected, the returns to these firms were negative. Further, the returns to the firms that announced layoffs for “reactive” reasons were more negative than the returns to the firms that announced layoffs for “proactive” reasons. The effect of employment guarantee announcements on the shareholder returns of 13 firms that announced employment guarantees in 1993‐1994 and on the returns of 63 firms that made similar announcements throughout the 1990 s was examined. Returns of these samples also responded negatively to the announcements. When the response to the two types of announcements was compared, however, there was no clear conclusion regarding which type of announcement drew a more negative response.

The regulations concerning preliminary profit announcements are contained in the Listing Rules of the Stock Exchange. The disclosure provisions are modest and there is no requirement for the document to be audited. There have been criticisms concerning the ambiguity of the auditors’ involvement and the timing of the release of information for a number of years. Amendments introduced in 1993 have done little to resolve the matter. As an empirical study of 148 randomly selected listed companies, seeks answers to the following three questions: Does the audit status have any relationship with the size or type of company? Is the audit status associated with the timing of the release of information? Is the audit status associated with the voluntary provision of additional financial statements? Concludes that there is considerable variety in company practice and that the Stock Exchange should take action to dispel the ambiguities concerning auditors’ involvement with preliminary profit announcements.

Using social network theory (SNT), this study empirically examines the impact of digital supply chain announcements disclosing corporate social responsibility (CSR) information on stock market value.

Based on 172 digital supply chain announcements disclosing CSR information from Chinese A-share listed companies, this study uses event study method to test the hypotheses.

First, digital supply chain announcements disclosing CSR information generate positive and significant market reactions, which is timely. Second, strategic CSR and value-based CSR disclosed in digital supply chain announcements have a more positive impact on stock market, however there is no significant difference when the CSR orientation is either towards internal or external stakeholders. Third, in terms of digital supply chain network characteristics, announcements reflecting higher relationship embeddedness and higher digital breadth and depth lead to more positive increases of stock value.

First, the authors consider the value of CSR information in digital supply chain announcements, using an event study approach to fill the gap in the related area. This study is the first examination of the joint impact of digital supply chain and CSR on market reactions. Second, compared to the previous studies on the single dimension of digital supply chain technology application, the authors innovatively consider supply chain network relationship and network structure based on social network theory and integrate several factors that may affect the market reaction. This study improves the understanding of the mechanism between digital supply chain announcements disclosing CSR information and stock market, and informs future research.

This paper investigates the announcement effect of shipping sale-and-leaseback (SLB) transactions. As an emerging source of financing, a growing deal of interest has been paid to the SLB. However, little is known about a variety of aspects of SLB transactions in the shipping industry. In this regard, this study examines the stock market reaction to the SLB announcements of shipping firms and their impact on shareholders' wealth.

A sample of 15 shipping SLB deals commenced by publicly listed Korean shipping companies during 2009–2023 are examined in this research. The announcement effect is measured by abnormal returns (AR) of their stocks based on the event study analysis.

It is found that the AR on the shipping SLB announcement date is, on average, −0.84% while there is no statistical significance. However, the results indicate that shareholders of shipping companies engaging in large-sized SLBs can experience positive AR around the announcement date.

This study is the first attempt to investigate the announcement effect of SLB transactions on the shipping industry and their impact on shareholders' wealth. The findings in this research can offer implications for the financing decisions of shipping companies and investment decisions of stock investors.

This study aims to explore the impact of carbon neutral announcements on “stock market value” of publicly listed companies in China.

The event study approach is adopted. Market, market-adjusted, Carhart four-factor model and a cross-sectional regression model are employed to examine the impacts of carbon neutral announcements on “stock market value” of Chinese companies based on data from 188 carbon neutral announcements.

Carbon neutral announcements positively impact Chinese shareholder value. Carbon neutral announcements at the strategic level have a more positive and significant impact on Chinese stock market value. Innovative carbon neutral announcements do not significantly cause Chinese stock market reactions. Companies have more positive and significant stock market reactions when the companies make carbon neutral announcements that reflect high supply chain network resilience and heterogeneity and strong supply chain network relationships.

The findings uncover the business value of carbon neutral activities and provide operations managers in developing countries insights into how to improve enterprises' market value by actively implementing carbon neutral activities.

This paper is the first trial to apply an event study to examine the relationship between carbon neutral announcements and Chinese stock market value from the perspective of announcement level and type and supply chain networks. This paper introduces corporate reputation theory and enriches the application of corporate reputation theory in the field of low-carbon environmental protections and supply chains.

This study aims to explore the impact of supply chain quality event (SCQE) announcements on enterprises’ stock market value.

This study adopts the event study approach and analyzes the changes in shareholder value of companies listed in China based on data from 118 SCQE announcements. In the event study, the market, market-adjusted and Carhart four-factor models are used to estimate abnormal stock market returns, and a cross-sectional regression model is performed to examine the effects of SCQE announcements on enterprises’ stock market value.

SCQE announcements have a negative impact on shareholder value. From the perspective of the supply chain network structure, the market reacts more negatively to SCQE announcements issued by the enterprises with higher supply chain concentration. From the perspective of companies’ characteristics, announcements that do not reflect the establishment of supply chain quality cooperation have a more negative effect on stock market value, which indicates that the supply chain network structure and firm-level characteristic can moderate the market reaction.

The findings demonstrate a quantitative evaluation of how SCQE announcements affect the stock market value of listed companies and provide guidance for managers to enhance the value of SCQE announcements.

This study fills the research gap on the impact of SCQE announcements on stock market value by using secondary data and first explores the relationship between SCQE announcements and stock market value from the perspective of supply chain network. Furthermore, this study contributes to the literature on SCQE using an empirical study in China.

This paper aims to examine the influence of the gender diversity in the corporate board on the decision of announcing a firm acquisition on Friday. Prior evidence found the phenomenon of investor inattention.

A sample of 252 cash-financed acquisitions conducted by listed Spanish firms from 2004 to 2018 is analysed. Probit regressions are used.

Firms with greater gender diversity on the board are less likely to make acquisition announcements of listed targets on Friday, thus avoiding investor inattention. Women directors seem to provide higher quality information and are more concerned about investors.

To the best of the authors’ knowledge, this is the first study that analyses the role of women directors in the publication of information on Friday, so it complements studies on the disclosure of quality information by listed companies. The Spanish market is an adequate scenario to analyse the impact of women's participation in business decision-making because Spain was one of the first countries to legislate on gender diversity.

Este trabajo analiza si la participación de mujeres en el consejo de administración puede influir en el anuncio de adquisición empresarial en un memento de poca atención (viernes) o en otro día de la semana.

Se analiza una muestra de 252 anuncios de adquisiciones en efectivo realizados por empresas españolas cotizadas en el periodo de 2004 a 2018. Se utiliza el análisis probit.

Las empresas con mayor porcentaje de mujeres consejeras tienen menos probabilidad de anunciar la adquisición de una empresa cotizada en viernes, evitando así la inatención del inversor. Los resultados sugieren que las mujeres consejeras comunican información de mayor calidad y tienen una mayor preocupación por los inversores.

Hasta donde sabemos este trabajo es el primero que analiza la influencia de las mujeres consejeras en la publicación de información en viernes y refuerza los estudios sobre la calidad de la información publicada por las empresas cotizadas. El mercado español es el contexto ideal para el estudio de la participación femenina en la toma de decisiones empresariales pues España fue uno de los primeros países en establecer cuotas de género en los consejos de administración.

This study aims to empirically examine the effect of supply chain innovation (SCI) announcements on shareholder value within the context of Industry 4.0 and Industry 5.0.

This study uses an event study method to examine the effect of SCI announcements on shareholder value of the 156 listed companies in China.

First, SCI announcements have a positive effect on shareholder value. Second, SCI with an integrated form more positively affects shareholder value than SCI with an independent form. SCI at the strategy level more positively affects shareholder value than SCI at the operation level. Technology-type SCI more positively affects shareholder value than process-type SCI. Third, this study finds that investors pay more attention to the SCI of companies in the service industry than that of in the manufacturing industry. Finally, the post-hoc analysis finds that digital SCI more positively affects shareholder value than intelligent SCI.

First, most scholars use questionnaire data rather than second-hand data to conduct empirical research to explore the impact of SCI on performance. Second, although scholars focus on performance comprehensively, including operational, financial, relational and environmental performance, no scholars use an event study to explore the impact of SCI on the stock market. Third, no scholars have explored the differential impact of SCI in different industries. Forth, few scholars have classified SCI according to the characteristics to explore the differential impact of SCI. Finally, the differences between SCI of Industry 4.0 and SCI of Industry 5.0 have been described, but no scholars have used empirical research to explore the differences.