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This paper aims to examine the communicative value of assurance reports by investigating whether the impact on information asymmetries is contingent on the length of the contractual relationship between clients and assurance providers, which can compromise the provider’s independence.

Using a firm-level data set of publicly listed international firms from 2007 to 2016, the authors estimate several regression models for panel data by using the generalized method of moments estimator to address the endogeneity issue.

Results find that the greater the communicative value in assurance statements, the lower the information asymmetries. However, this effect is constrained when the assurance provider’s independence is compromised due to an excessively long-term contractual relationship. In other words, assurance statements with more informative value enhance the firm’s transparency and increase users’ confidence in the sustainability information provided. However, the loss of independence linked to longer tenure jeopardizes the communicative value of the assurance report and contributes to reducing information asymmetries.

The study makes at least three clear contributions to current literature. First, the authors contribute to the limited existing research about the communicative value attributed to assurance statements by stakeholders. Second, the authors indirectly contribute to the literature that analyses whether stakeholders understand the assurance report, a complex statement in a growing market. Addressing the communicative value of assurance is certainly a difficult task, as it is a novel and complex activity. Third, the main contribution is providing initial empirical evidence about the moderating effect that assurance provider tenure has in the relationship between the informational content of the assurance report and the level of information asymmetries. To date, there is no empirical evidence regarding the moderating effect of long assuror’s tenure as an important feature of the assurance market, and beyond that, regarding its impact on the communicative value assigned by stakeholders to assurance statements.

Credibility concerns regarding integrated reports can harm the intended decrease of information asymmetry between a firm and its investors. Therefore, it is crucial to examine whether voluntary third-party assurance enhances the credibility of integrated reports and, thus, decreases information asymmetry. Furthermore, this study aims to investigate the interaction effect between assurance quality and the disclosed connectivity of the capitals, a distinguishing feature of integrated reports.

Content analysis is performed of the 176 assurance statements included in the 269 integrated reports of Forbes Global 2000 firms disclosed from 2013 to 2015 and the 269 integrated reports themselves. Regression analyzes are applied to examine the associations between assurance, the disclosed connectivity of the capitals and information asymmetry.

The presence of an assurance statement in an integrated report significantly decreases information asymmetry. Surprisingly, assurance quality is not significantly associated with information asymmetry. However, an interaction analysis reveals that combining high assurance quality with high disclosed connectivity of the capitals allows a significant decrease in information asymmetry.

The paper demonstrates that the connectivity of the capitals of integrated reports and assurance quality are connected and together are associated with information asymmetry.

The results imply, both for report preparers and standard setters, that assurance quality is advantageous only when combined with disclosed connectivity of the capitals.

More information on non-financial information measured by the connectivity of the capitals of integrated reporting has an interaction effect together with assurance quality on information asymmetry.

This paper builds on a unique data set derived from the contents of integrated reports and accompanying assurance statements. Furthermore, it extends the integrated reporting literature by investigating the interaction between assurance quality and the disclosed connectivity of the capitals, which had not previously been examined in combination.

The purpose of this paper is to document a study of European and UK triple bottom line (TBL) report assurance statements.

In undertaking the research, an international database was constructed from which all known European and UK third‐party assurance statements that accompanied the release of TBL reports were selected for review.

The results of the analysis indicate that there is much variability and ambiguity inherent within the contents of the third‐party statements.

The UK and European reports included within the database compiled by the researchers provide the basis of the information used to develop this paper. In selecting assurance statements to include within the database, the latest TBL report from each reporting organization was obtained (and it should be appreciated that many organizations do not produce TBL reports on an annual basis). Of the 170 reports available internationally at the time the research was undertaken, 8 are from 2000, 86 from 2001, 65 from 2002, and 11 from 2003. Whilst the database is the most extensive one of its type, given the finite nature of resources available, it is stressed that the database is not exhaustive.

Taken together, the results of this analysis lead us to question the value that such assurance statements provide to the TBL reporting process.

Assesses the ambiguity and questions the value of assurance work on TBL statements as currently being undertaken.

This paper aims to critically analyse the content of the assurance statements of corporate sustainability reports to examine the degree to which assurance statements enhance and uphold organisational transparency and accountability to stakeholders.

This framework of content analysis draws on a research instrument developed by O’Dwyer and Owen (2005), as well as the most recent assurance guidelines (Global Reporting Initiative) and standards AA1000AS, 2008 and ISAE 3000.

Due to the lack of stakeholders’ engagement in the assurance process, due to the scope limitation placed on the assurance engagement and due to the reluctance of the assuror to address the assurance statements to the stakeholders groups, sustainability assurance practice cannot be considered as the accountability enabler. With persistent focus on internal systems, process, data generation and data capture, assurance practice is serving more as an internal control tool than as a social accounting/auditing instrument.

A single country context is studied. However, to the extent that assurances are conducted using common sets of assurance standards and guidelines, there is external validity of the findings.

Despite the institutional initiatives by the global and local institutions regarding social and environmental sustainability reporting and assurance, the assurance practice has not yet emerged as a tool of social accountability.

This study provides a comprehensive and up-to-date empirical assessment of the degree to which the sustainability assurance practice encompasses the issue of stakeholders’ interests and forms the potential basis for policy implications to the assurance practice and to the assurance standard setting process.

The purpose of this paper is to examine the form, content and reporting arrangements of “statements of assurance” required from Fire and Rescue Authorities in England since their introduction in 2012 and identify potential improvements for future implementation.

A multi-method approach was adopted which commenced with an analysis of the current official guidance, an exploration of the accessibility and structure of the current statements produced; followed by a review of those statements through a desk based analysis complemented by a series of elite interviews.

The current guidance was found to be too broad and open to interpretation to be fit for purpose. This has led to some significant variations in reporting, limiting the statements’ usefulness to key users and stakeholders. Most authorities provided some form of report on their website but inconsistencies in respect of length, structure, name and content, limit their value. The research found that 30 per cent of authorities did not have an up to date statement available online. These findings were supported by the series of interviews. The result has led to confusion amongst authorities as to the statement’s role and the risk of it being perceived as a “box ticking” exercise rather than a real contribution to public assurance.

This paper provides potential lessons which could be adopted to inform future guidance in respect of the preparation and publication of the statement of assurance and its role within the wider public assurance regime for fire and rescue authorities. If adopted, these would improve the accountability, transparency and public assurance of Fire and Rescue Authorities which is a key objective of their governance arrangements.

The statement of assurance has only been a requirement of authorities since the current National Framework for Fire and Rescue was published in July 2012 and has not been subject to independent research since its inception. The government have recently issued a consultation on a new national framework, but this proposes changes to the statements of assurance. The findings will therefore be of value to the government, the fire and rescue sector and the recently appointed regulators for the service Her Majesty’s Inspectorate of Constabulary and Fire and Rescue Services.

This paper aims to examine whether an expectation gap exists between different stakeholders (i.e. emissions preparers, emissions assurers and shareholders) in relation to the assurance of greenhouse gas emissions. Further, the paper seeks to explore whether stakeholder expectations are influenced by the uncertainties inherent in the assurance engagement for different industry sectors (i.e. greenhouse gas emitter or greenhouse gas user entities).

An experimental survey was used to address the stated aims. Three stakeholder groups: shareholders, greenhouse gas emissions preparers and assurers, completed a survey based on the greenhouse gas emissions assurance for either an emitter or user entity.

The results provide support for the existence of an expectation gap in the emission assurance setting. Fundamental differences were identified between the stakeholder groups in relation to the responsibilities of the assurer and management; as well as the reliability and decision usefulness of the emissions statement. Moreover, the extent of the gap was found to differ between user entity engagements and emitter entity engagements.

The paper highlights the need for the assurance services profession and assurance standard setters to consider mechanisms to enhance the effectiveness of communicating the assurance function in this setting in order to enhance the credibility and social value of emissions assurance.

The paper is the first to examine the expectation gap in the greenhouse gas emissions assurance context. It thereby also contributes to the literature on the expectation gap in the assurance of non‐financial information. Moreover, the research findings provide standard setters with unique insights into areas to consider as they work toward the development of an international assurance standard for greenhouse gas emissions statements.

The purpose of this study is to examine whether different levels of assurance statements of environmental disclosures affect investment choices in the French context where environmental assurance was voluntary until 2012 and became regulated and mandatory since then.

The authors conducted an experiment during the voluntary context – which represents the vast majority of countries – on a sample of 108 financial analysts.

Environmental disclosure has a positive impact on investment recommendations. More surprisingly, financial analysts are less likely to give recommendations in favor of a company that displays environmental disclosure with low-level assurance than for a company with no assurance statement at all.

When assurance is voluntary and there are at least two levels, this study results suggest that firms should avoid selecting the lowest level of assurance because it negatively affects investor decisions. From this perspective, firms should devote sufficient effort and resources to obtain at least Level 2 environmental disclosure assurance.

Given the recommendations made by financial analysts, the authors could expect that firms may prefer to engage in a higher level of assurance or to provide no assurance rather than minimize their financial efforts and resources to select a lower level of voluntary assurance regarding environmental disclosure.

This study has implications for the voluntary assurance practices of environmental disclosure and can provide support to regulators to promote higher standards in environmental assurance. It documents the relevance to increase the level of requested assurance for environmental disclosure.

To the best of the authors’ knowledge, very few studies have examined the additional effect of assurance on environmental disclosure in investors’ decisions. The experiment is conducted with financial analysts in the context of voluntary assurance.

This study aims to investigate the effect of assurance provider types on the independent assurance statement quality of Asian companies' sustainability report (SR) and examine environmental risk’s role as a moderating variable.

This study analyzes large Asian companies' stand-alone SR using moderated regression analysis to test hypotheses. Textual analysis is conducted to identify environmental risk disclosures.

This study shows that accounting assurance providers affect independent assurance statement quality in terms of compliance with assurance statement elements, while nonaccounting assurance providers can better accommodate environmental risk information required by the intended users.

This study has several limitations. The research focuses on assurance statements and stand-alone SR of large companies in Asia; therefore, future research could examine similar analyses using integrated reports from Asia to investigate whether the results will differ. Additionally, this study does not divide assurance providers into Big-N and non-Big-N; thereby, it can be extended in future research.

Assurance providers need to consider environmental risk as a critical issue for the intended users to issue a high-quality independent assurance statement.

Assurance statements issued by assurance providers increase public confidence in the reliability of the information contained in the SR. Therefore, regulators are expected to immediately set mandatory standards for sustainability assurance practices.

This study proves that accounting assurance providers can improve assurance statement quality. The variable environmental risk is also proven to be a pure moderator in negatively interacting the effect of assurance provider types on independent assurance statement quality.

The purpose of this paper is to examine whether the level of assurance associated with financial statements affects individual investing decisions.

A between-subjects behavioral experiment is used with a control condition and three treatment conditions involving different levels of auditor assurance.

As the level of assurance progresses from none to compilation to review to audit, investors’ perceptions of risk associated with the investment decrease. However, the type of certified public accounting (CPA) firm association did not seem to influence the amounts that individuals were willing to invest.

The results for the investment scenario in this paper cannot necessarily be generalized to other types of investment scenarios. Also, individuals often obtain more information about an investment prospect than what appeared in this study’s questionnaire. Another limitation is that this study did not have economic incentives such as suffering financial losses from poor investing decisions.

Findings about risk assessments suggest that companies might be willing to pay more for greater levels of CPA firm assurance, but the results pertaining to amounts invested suggest that companies need not consider incurring additional costs to obtain more assurance.

No prior study has unambiguously examined the effects of compilations, reviews and audits on investing decisions. This study explores this issue by conducting an experiment whereby investing judgments are compared across groups who received information about one of four levels of auditor assurance.

As companies begin accounting for the triple bottom line, external corporate social responsibility (CSR) assurance provides stakeholders with assurance that CSR disclosures may be relied upon. In this way, companies may go some way towards avoiding their CSR efforts simply being perceived as greenwash or a public relations exercise. Several organisations currently provide this assurance, using different methodologies and standards. Using a content analysis, the annual and/or CSR reports of the top 100 South African publicly listed companies were investigated in respect of CSR assurance, and compared with international trends. Despite a slow response, the evidence suggests that CSR assurance prevalence is growing. It was found that despite its developing country status, the prevalence of CSR assurance by South African companies compared favourably with that of their counterparts in developed countries. In South Africa and the UK, the audit profession, led by the “Big 4” firms, is the dominant provider of CSR assurance. As the demand increases, the auditor’s role as a CSR assurance provider is expected to become increasingly more important, especially in South Africa, where the audit profession is highly regarded. This increased demand for assurance services will require the global audit profession’s paradigm to be re‐examined to include competence in contextual accounting and auditing.