The purpose of this study is to test the effect of sustainability report on the
value relevance of accounting information. This study’s sample included
617 Thai firms that were listed between 2013 and 2017. The sample consisted
of 1,409 firm-year observations, and Ohlson (1995) valuation model was used
to determine the value relevance of accounting information. According to
the results, the interaction coefficient between the sustainability report and
book value per share was positive, while the interaction coefficient between
the sustainability report and earning per share was negative. These results
suggest that sustainable development information is seen in the interests of
investors seeking a long-term return on their investment, and that sustainable
development data is used to supplement accounting information in decision-making.