in the post-IFRS period (0.886 and 1.005 respectively) The relative coefficients for mandatory adopters on the pre-IFRS period are negative and non-significant suggesting that the adoption of IFRS had a significant positive impact on the value relevance of earnings and the book value of equity, thus verifying H2a. Also the interaction terms of DVOL for voluntary adopters with NIPS and BVPS are positive and significant suggesting that voluntary adopters are characterized by enhanced value relevance relative to the other firms which followed Greek GAAP. The negative coefficients on the accounting variables during the pre-IFRS period for the mandatory adopters could also be attributed to the financial distress that was experienced after the ASE crash in 1999-2000, which may have impacted on the perceived quality of accounting information. Stated differently. Investors may have lost confidence in the capital market due to severe deficiencies during the crash period which influenced the relevance of financial statements as a whole, resulting in a smaller association between returns, earnings and book value. However, the introduction of well-respected and high-quality accounting standards, such as IFRS, may have reinstated investors’ confidence in financial reports and increased the relevance of accounting information. Also, hypothesis 2a is verified by the increase in R2 up to 67.1% during the post-IFRS period compared to the pre-IFRS period of 6.7% The Vuong Z statistic is significant in the 1% significance level indicating that the model during the post-IFRS period better explains the original data relative to the same model during the pre-IFRS period. This finding verifies recent evidence provided by Ding et al. (2007) who document that the higher the “absence” between domestic accounting information to the market. Greece was found to be the top country in the absence score suggesting that the introduction of IFRS and the enrichment of coverage of the local accounting standard are crucial for improving the transparency and relevancy of accounting disclosures. Thus, we can conclude that the adoption of IFRS resulted in an improvement in the value relevance of accounting information compared to the local accounting standards.