The Impact of Private Ownership ratio on Economic Value added (EVA) And Return On Asset (ROA) in Tehran Stock Exchange Corporations

Since abandoning public corporations on the other hand, transferring to private is proceeding in recent years, therefore this research follows investigating and comparing public and private enterprises performance in Tehran stock exchange corporations through out economic value added (EVA) and return on asset (ROA) criteria.The domain of this query is 1383 to 1386 and population includes all of Tehran stock exchange corporations. Forecasted sample size for 4 years for this research equals 160 cases that 40 competent cases from 181 cases is sampling.Result of statistical analysis illustrate that direct relation between private ownership ratio and return on asset and economic value added also about 0.14 EVA changes and about 0.7 ROA changes are explained by private ownership ratio, besides the relationship between ROA and EVA is directive and significant.