Studying the factors affecting the difference between received and paid bank interest revenues in Iran economy

Banks are the most important financial mediators in economic systems, which play the role of attracting the sources and cash them for investment activities in financial sections. Thus an effective banking system brings economic proliferation and development. Nowadays the issue of financial reforms, especially in developing countries, is an important topic and financial reforms are the main part of their structural modulation. Among these reforms we can refer to lowering the difference between two bank interest revenues, which is a reform related to banking system. For the interest revenue indicates the efficiency of banking system. According toresearches, by deepening the difference between interest revenues, the efficiency of banking system is reduced, and vise versa. That is an inadequate banking system heightens the interest revenues because of its inefficiency.