6. Summary and concluding remarks
In this study, we compare the value relevance of accounting information for three groups of firms over two periods. First, we compare the value relevance of equity book value, earnings and change in earnings of IFRS-Firms (voluntary IFRS adoption) and non IFRS-Firms (domestic standards) in the pre-adoption period. On a second level, we compare the value relevance of non IFRS-Firms over the pre-and post-adoption periods. Finally, we compare the value relevance of IFRS-Firms over the pre- and post-adoption periods.
Our findings show that the voluntary IFRS adoption in the pre-IFRS period has not improved the value relevance of the equity book value, earnings, and change in earnings. The results suggest that the voluntary IFRS adoption negatively affects the value relevance of the equity book value and earnings for firms in the pre-adoption period. Our findings are different from the study of Landsman et al. (2012) which demonstrated that voluntary the IFRS adoption increases the information content of the earnings. Therefore, our first sub-hypothesis (H1a), which predicts that voluntary IFRS adoption increases the value relevance of the equity book value and earnings, is rejected. In addition, after testing the sub-hypothesis (H1b), the result shows that the voluntary IFRS adoption doesn’t affect the value relevance of earnings and change in earnings for firms in the pre-adoption period. This result stipulates the rejection of H1b, which predicts that voluntary IFRS adoption increases the value relevance of the earnings and change in earnings.