M.A. Thesis:

The Impact of Institutional Ownership and a Firm's Size on Firm

One of the most important factors in investor decisions is the value of the company and its influencing factors. In fact, investors anticipate the trends of price changes and value changes by identifying the factors affecting the value of companies and thus make the necessary decisions to buy or not to buy stocks. Considering the importance of corporate value, this study examines the impact of institutional ownership and firm size on corporate value, considering the variable role of tax avoidance moderator. Kyotubin index was used to measure firm value. Using a sample of 135 firms from Tehran Stock Exchange companies during the period 1996-96 and using regression model, the results show that size of company has a negative effect on company value. In addition, the results have shown that tax و And that each shareholder has different interests and expectations, the ultimate goal, and what they all have in common, is to maximize the current value of the investment made.avoidance moderates the From the perspective of the capital market and shareholders today, what constitutes company value is sustained and sustained value-added growth, not past and short-term profitability.relationship between firm size and firm value.

Keywords: اندازه شرکت، ارزش شرکت، مالکیت نهادی، اجتناب مالیاتی