Immediate disclosure regulations information was delivered in 1380 by the Council of the Stock Exchange and the Securities Market Law was passed in 1384. The main objective of this study was to investigate the effects on the quality of information disclosure regulations adopted by the Company are reported profits. The present study investigated the effects of regulatory approval in three intervals since 1378 and Exchange 1380 pre-regulation Between 1384 and 1381 years after the adoption of the provisions of the Securities Market Act Between the years 1385 and 1387 of the Act deals with the securities market .Based on information provided quality velocity data (timeliness) and prediction error (reliability) is measured. The sample consists of 119 companies listed in Tehran Stock Exchange Shrek selected data variables collected using Kruskal and Wallis is analyzed. The results showed that there was a decrease in the percentage of earnings forecast error, which seems to be related to the uncertain business environment. Dividends declared official after the regulations have been more time. After the enactment of regulations, the quality of disclosure in terms of timeliness has improved.
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