The inter-temporal relationship between risk, capital and efficiency: Evidences from Iranian Banks
The increase in concentration in the banking sector, along with the problems of the recent financial and economic crises, has shown the importance of banking regulations against the high risk caused by the imbalance in the banks' balance sheets and one of the basic measures in the development of banks is to increase the efficiency of these financial institutions. Therefore, efficiency in banks always has been a matter of attention, and the weakness of the banking system can be a serious threat to the stability of the macro economy. In this way, banks with their credit operations and financing for different economic sectors, they provide suitable conditions for investment and cause the increase and growth of capital and finally the national production. The aim of the current research is to inter temporal relationship between risk, capital and efficiency in Iran's banking system. For this purpose, the data of Iran's commercial and specialized banks have been collected during the years 2006 to 2019 and to evaluate the model, In order to measure the model, the efficiency of banks has been estimated using the stochastic frontier model (SFA), Then, the relationship between risk, efficiency and capital is investigated using the seemingly unrelated regression (SUR) approach. In total, the obtained results show the existence of a relationship between capital and efficiency with risk. The results indicated that with the increase in the capital ratio, the risk of banks decreases and also increasing efficiency increases risk, also with the increase in the internal rate of return of banks, the capital ratio increases and Increasing the size of the bank increases efficiency.
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