The effect of Competition Proprietary Costs on relationship between sales and cash flow Instability and Financial Statement Comparability

The more comparable of financial statements, the lower the information asymmetry and so capital market is more efficient, which results in the optimal allocation of resources. The purpose of this study was to investigate the effect of Proprietary Costs of Competition on relationship between sales and cash flow Instability and Financial Statement Comparability in the companies Accepted in Tehran Stock Exchange. To test research hypothesis, the data of 126 companies accepted in Tehran Stock Exchange during the years 2009-2017 and multivariate regression has been used. The results show that sales fluctuation has a significant negative effect on the Financial Statement Comparability, and this effect is aggravated by the involvement of the Proprietary Costs of Competition (R & D expenditures). However, the cash flow fluctuations and sales growth fluctuations and their interactive effect With Proprietary Costs of Competition (R & D expenditures) have no significant effect on Financial Statement Comparability.