Cost stickiness, ownership concentration, and investment in efficiencies in listed companies in Tehran Stock Exchange

The purpose of this study was to investigate the cost adherence, ownership concentration, and investment inefficiency of listed companies in Tehran Stock Exchange using hybrid data method during 2011-2018. This research is a quasi-empirical and post-event research in the field of factual accounting and factual information research. The results of data analysis showed that cost stickiness has a direct and significant effect on investment inefficiency. Investing in different things has always been considered as one of the most important ways of developing companies and preventing stagnation and backwardness. Meanwhile, resource constraints and the rapid growth and transformation of economic relations have led to fierce competition in trade, industry and investment. Therefore, companies need to make timely investments in order to survive and expand their activities or in other words, increase their investment efficiency. Also, ownership concentration has a direct and significant impact on investment inefficiency.