Investigate the relationship between liquidity, disclosure quality and firm value based on the system of simultaneous equations

In this paper the relation between liquidity and firm value considering the quality of disclosure as an intermediate has been examines. For this purpose, a model system of simultaneous equations using Panel Data and Seemingly Unrelated Regression Approach are used. The data used in the estimation of time series and related companies in Tehran Stock Exchange for the years 1385 to 1391 have been. The data are paired with the transparency and disclosure (TD) scores provided by Standard and Poor's which are used. Also we employ three liquidity indicator the log of trading volume, the Amihud illiquidity ratio, and the proportion of zero-return days. Based on the results, liquidity thereby increasing the company's value will improve directly through its effect on Tobin's Q indicator and indirectly by improving the quality and level of disclosure has been made.