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This paper aims to investigate the current state of knowledge in key reporting aspects in relation to sustainability reporting in general and to reflect on their relevance to Global Reporting Initiative (GRI) in particular. In doing so, the major gaps in that knowledge are identified, and the paper proceeds to suggest further research avenues.

The authors conduct a review of papers published in leading journals concerning sustainability reporting to analyse the progress in the literature regarding three important reporting topics: materiality, comparability and assurance.

The review conducted in this study shows that there is still work to be done to ensure high-quality and consistent sustainability reporting. Key takeaways from the review of the extant literature are as follows: there is ongoing debate about the nature of sustainability reporting materiality, and single versus double materiality. Clearer guidance and better contextualisation are seen as essential for comparability, and, as GRI suggests, there is an important link to materiality that needs to be considered. Finally, assurance has not been mandatory under the GRI, but the current development at EU level might lead to the GRI principles being incorporated in the primary assurance standards.

In this paper, the authors review and synthesise the previous literature on GRI reporting dealing with three key reporting aspects.

The authors extract some takeaways from the literature on materiality, comparability and assurance that will all be key challenges for GRI in the future.

This paper provides an updated review of the literature on GRI reporting dealing with three key reporting aspects.

This study aims to investigate the influence of organisations’ board gender diversity on the adoption of the United Nations sustainable development goals (SDGs) and on the use of external assurance.

The paper combines data from the Global Reporting Initiative’s Sustainability Disclosure Database and the Orbis database from Bureau van Dijk. The study uses logit models based on a sample of 366 large Asian and African companies which have addressed the SDGs in their sustainability reports published in 2017.

The results reveal that board gender diversity is positively associated with sustainability reporting and the involvement of an external assurance provider.

This study adds to the growing literature on the relationship between women’s participation on corporate boards and SDG reporting. Additionally, it addresses the understudied question of how the gender diversity of board resources affects the adoption of the external assurance of sustainability reporting.

The purpose of this study is to extend existing knowledge on the determinants of sustainability report (SR) assurance practices. Four different theories – stakeholder theory, institutional theory, signaling theory and legitimacy theory – are used to formulate several hypotheses regarding the main factors that can influence a company’s decision to assure its SRs.

Using a sample of 417 listed organizations based in different European countries over five years, the effects of stakeholder commitment, country orientation toward sustainability, firm environmental performance and business ethics controversies on the decision to assure SRs are assessed.

The results show that a company’s decision to assure its SRs is motivated by the need to maintain good relations with its stakeholders (which is in line with stakeholder theory and legitimacy theory), as well as by the willingness to signal their sustainability performance (which is in line with signaling theory) and to gain legitimacy. On the contrary, business ethics controversies do not seem to be relevant to a company’s assurance practices.

This paper provides new insights into the influence that social, environmental and institutional factors have on assurance strategies. New factors that previous research does not investigate – environmental performance, business ethics controversies and corporate governance – are tested. Factors that are already investigated in the literature are considered from an original perspective of introducing alternative measures (e.g. for the scope of national sustainability policies).

There is a growing interest in how firms respond to environmental degradation and societal challenges. Firms respond through their sustainability reports, but assurance of the reports gives confidence to the stakeholders. This study aims to identify the main research development in sustainability assurance which is rising in global studies.

This study uses a bibliometric analysis to assess the global trend in sustainability assurance studies. The methodology is based on descriptive, performance and science mapping. The set is based on 655 documents from the Scopus database, covering the period from 2005 to 2022.

The findings from the study suggest that sustainability studies are relevant, and the researcher's examination of the domain has dramatically increased from 2014 to date. This is due to the rise in the concerns expressed by stakeholders in satisfying themselves about the firm's responsibility to the Sustainable Development Agenda 2030. The findings also show that most research on sustainability assurance is from Spain, the USA, the United Kingdom (UK) and Australia. However, the UK has the most collaboration in terms of co-authorship. It is suggestive that the UK has more links than Spain, which is the most productive country with more publications. This may be attributed to the influx of more international students completing a second and third degree in the UK. The study highlights intellectual foundations and emerging trends and outlines avenues for future studies.

This study is limited to the data obtained from the Scopus database.

This study is the first bibliometric study of the sustainability assurance domain.

In this study, the authors provide a systematic literature review of articles in the emerging areas of green finance and discuss the status and challenges in sustainability disclosure, which is crucial for the efficiency of green financial instruments. The authors then review the literature on the economic implications of green finance and outline future research directions.

The authors use the analytical framework – Search, Appraisal, Synthesis, and Analysis (SALSA) to conduct the systematic review of the literature.

Increasing public attention to the environment motivates the use of green finance to fund environmentally sustainable projects, and the rise of green finance intensifies the demand for environmental disclosure. Literature has documented tremendous growth in sustainability reporting over time and around the globe, as well as raised concerns about how such reporting lack consistency, comparability, and assurance. Despite these challenges, the authors find that in general, the literature agrees that a firm’s green practice is positively associated with its financial performance and negatively related to a firm’s cost of capital. Green finance is also found to bring about enhanced risk management and economic development.

The authors provide one of the first reviews of green finance, sustainability disclosure and the impact of green finance on financial performance, capital market and economic development.

This paper aims to clarify whether assurance on non-financial corporate social responsibility (CSR) reports impacts the perceptions and decisions of banks as capital providers. The authors investigate the effects of the type of assurance provider and the level of assurance provided on decisions by banks to grant credit, make their own personal investments or recommend share purchases to their customers. The study aims to expand the domain of assurance on CSR reports (CSRR) by taking up a call by Cohen and Simnett (2015), who ask for behavioral research on how non-financial report’s intended users interpret and react to assurance.

The paper is based on an experiment case on a fictitious company with a 2 × 2 + 1 between-subjects design. To overcome concerns regarding external validity and to prove results in a real-world setting, the authors selected German bank directors as subjects due to the extremely high relevance of banks to the German economy. The authors investigated the perceptions of 69 bank directors and analyzed the influence of CSR assurance on their decisions.

The findings suggest that assurance positively influences confidence in CSRR and that, consequently, bankers are more likely to make favorable decisions toward the reporting companies, such as approving applications for credit, investing themselves in the company or recommending the purchase of shares to their clients. These effects are stronger when an accounting firm provides the assurance and when the assurance level is reasonable rather than limited.

The arguments presented are, strictly speaking, limited to the case in the experiment and the views held by the bank directors at the time the authors sent out the questionnaires. Moreover, the cell sizes are quite small. Nevertheless, the authors were able to find highly significant results.

The main implication of the paper is that the purchase of CSRR assurance services has a positive effect on bank directors’ perceptions and decisions. They favor the provision of such services by accounting firms and they prefer a reasonable assurance level. Thus, it can be concluded that bank directors perceive quality differences between assurance providers, are able to recognize the difference between reasonable and limited assurance and that the related information is relevant for their decisions.

This paper fulfils an identified need to study the influence of CSRR assurance on decisions by bank directors. The observation of a high decisions-usefulness of CSRR assurance suggests that regulators should consider mandating some form of assurance on non-financial reports throughout the EU member states.

This paper discusses the evolution of sustainability reporting and the role of the Global Reporting Initiative (GRI) in relation to the social and environmental accounting (SEA) literature calling for a revolution in the standardization of sustainability reporting and the inherent complexities. This paper focuses on the future role of GRI in light of the changes resulting from harmonization supported by the International Sustainability Standards Board and the European Financial Reporting Advisory Group’s draft European Sustainability Reporting Directive.

Building on Bourdieu (1983, 1992) and SEA studies, the authors adopt a critical and qualitative approach to theorize power dynamics in the sustainability reporting field. After identifying the main issues arising from the complexity of the sustainability reporting standards and practices according to SEA scholars, the authors connect them with Bourdieu’s (1992, 1983) field theory to discuss the future role of GRI.

The findings suggest two distinct but intertwined roles that GRI could play in the future, namely, power related and theoretical/technical, aimed at engendering revolutionary rather than evolutionary changes in sustainability reporting.

This study offers practical implications for GRI to strengthen its future role in sustainability reporting standardization.

The limited time available to mitigate the disastrous consequences of non-sustainable business on society and the environment calls for urgently addressing the complexities of sustainability accounting to foster a positive impact on society and the environment.

The authors’ reflections reclaim the SEA literature as central to identifying sustainability complexity and Bourdieu’s (1983, 1992) notions of power as key to understanding the role of GRI in the sustainability field. Furthermore, this paper emphasizes the intersection of different critical concepts, including power, complexity, value, capital and materiality.

The purpose of this paper is to explore the practice of integrated reporting (IR) assurance from the auditors’ point of view, including the main challenges to be addressed and insights on evolution and potential new assurance approaches.

Based on an exploratory research design, the paper conducted semi-structured interviews with 10 expert auditors, accounting assurance providers and non-accounting assurance providers, in the Italian context, combining an open coding approach with an axial coding approach, and using a three-stage process to organize data.

Respondents confirmed that current IR practices do not represent a real paradigm shift and that the need for in-depth changes in the assurance approach will depend on how these practices evolve. The main challenges highlighted are the absence of suitable criteria, the difficulty of assuring narratives and future-oriented information, and the low level of maturity of internal systems and processes of companies and stakeholders. Proposals for overcoming these challenges are framed mainly within current assurance models, although some respondents pointed out the need for a shift towards new assurance approaches.

The paper relies on a small sample of well-informed subjects active in Italy; thus, the results may not represent the views of all auditors.

The findings identify areas that practitioners and assurance provider firms should focus on, looking to IR assurance and its growing importance and application as a future business area. They may be useful to standard setters and regulators to better understand limits and opportunities of requiring IR assurance on specific information not strictly related to financial information, and for the development of guidance or standards for IR assurance.

This research contributes to the currently underexplored area of IR assurance. Relatively few studies have investigated this topic from an empirical point of view, and no study involving auditors has been carried out in the Italian context.

Over the past decade, researchers have witnessed an exponential growth in the number of publications on IR. This paper aims to understand the state of the art of the research field and to highlight the areas where further academic research is needed, guiding developments in theory, research, policy and practices.

The authors apply the dynamic literature review method called “Systematic Literature Network Analysis”, which combines systematic literature review and bibliographic network analysis. Furthermore, to overcome some of the limitations connected to the methodology, the authors integrate the literature with a manual content analysis of papers.

IR adoption and practices and their determinants represent the most analyzed aspects of literature. Over time, attention has been paid to more specific issues, such as the relationship between IR and other disclosure mechanisms, IR quality and its assurance, the critical analysis of the IR framework and principles and difficulties in IR adoption. Although the literature on IR can be considered to be in its mature stage, many aspects are still under-researched, so there is plenty of space for future research.

The authors propose the following main issues as subjects to be investigated in future studies: IR is not simply an evolution of sustainability reporting, but an innovative communication tool; the debate on who the recipients of value are (shareholders or stakeholders) and on what the definition of value adopted by IR is still remains an open issue; more attention should be given to the role of IR as a managerial tool, which could support strategy formation and communication, and influence internal processes of performance measurement and evaluation; what the future of IR will be in light of recent EU Corporate Sustainability Reporting Directive and new ISSB's standards is still an open question. From a methodological perspective, little is known about structured approaches in accounting studies. The authors confirm how methodologies, such as that of this paper, may be exploited as a tool to support dynamic analysis for setting the agendas for future studies in the accounting field.

This paper aims to analyse the impact of the European Union (EU) Directive on the quality of sustainability reporting under the institutional theory lens. Specifically, the authors evaluate what kind of institutional pressure has the highest impact on the quality of corporate disclosure on sustainability issues.

The authors build a quality index based on the content analysis of sustainability information disclosed, before and after the transposition of the Directive, by Italian and Spanish companies belonging to different industries. The authors use an OLS regression model to analyse the effect of coercive, normative and mimetic forces on the quality of the sustainability reports.

The results highlight that normative and mimetic mechanisms positively affect the quality of sustainability reporting, whereas there is no evidence regarding coercive mechanisms, indicating that the new requirements do not provide a significant contribution to the development of better reporting practices, at least in the two analysed countries.

To the best of the authors’ knowledge, this is one of the few studies assessing the quality of sustainability reporting through an analysis involving the period before and after the implementation of the EU Directive. It enriches the literature on institutional theory by analysing how the different dimensions of isomorphism affect the quality of information disclosed by companies according to the EU requirements. It contributes to a better understanding of the impact of the non-financial information Directive, and the results of this paper can be relevant for regulators, practitioners and academia, especially in view of the adoption of the new Corporate Sustainability Reporting Directive proposal.