An overview and suggestions for future research Research overview and background The public sector is regarded as a steward for social and environmental issues. The primary objective of public sector organisations (PSOs) is to deliver public policy and promote social welfare (Ball and Grubnic, 2007). Their roles and responsibilities are more explicitly linked to the sustainability agenda than those of the corporate sector (Ball, 2002). The public sector has far greater responsibilities for promoting and supporting sustainable development in comparison to the private sector whose core goal is limited to maximizing shareholder value (Ball et al., 2014). The public sector is a significant employer and provider of services and consumer of resources; therefore, it has a significant impact on national and international progress towards sustainable development. Moreover, PSOs are facing increasing pressures to lead by example in managing and reporting sustainability issues (GRI, 2004, 2005; GRI FPA, 2012). Because of the critical impact PSOs have on the environment and society, it has become increasingly vital to explore their sustainability accounting, accountability and reporting practices as well as undertake research that engages with practitioners and policymakers in the public sector (Ball and Grubnic, 2007; Ball et al., 2014). Sustainability performance encompasses activities other than those financial measures used in the financial accounts such as natural resource conservation and emission levels, environmental activities and initiatives, aspects of employment, occupational health and safety, community relations, stakeholder involvement and the economic impact of the organisation (Hoque and Adams, 2008). Sustainability accounting enables the systematic identification and interlinking of the social, environmental and economic costs and benefits of organisational strategies and actions and embeds these considerations into organisational decision-making (Hopwood et al., 2005). Subsequently, sustainability reporting serves as "a vehicle to assess the economic, environmental and social impacts of the organisation's operations, products, and services, and its overall contribution to sustainable development" (GRI, 2004, p. 20). Existing literature indicates that the public sector has embraced sustainability accounting and reporting practices. The key research foci to date have addressed sustainability reporting practices (