بررسی اثرات تکانه های پولی بر متغیرهای کلیدی اقتصاد ایران در شرایط بحران بانکی :رهیافت مدل تعادل عمومی پویای تصادفی

نظام بانکی در ساختار یک اقتصاد نقش مهمی را ایفا می‌کند و چالش‌های این بخش می‌تواند سایر بخش‌ها را تحت تاثیر قرار دهد. یکی از مهم‌ترین چالش‌های نظام بانکی، وقوع بحران بانکی است. بحران بانکی زمانی اتفاق می‌افتد که بسیاری از بانک‌ها به طور همزمان با مشکلات پرداخت بدهی یا نقدینگی جدی مواجه باشند. وقوع بحران علل مختلفی دارد که از عمده دلایل آن می‌توان به حجم بالای مطالبات غیرجاری و منجمد شدن دارایی‌‌های بانک در نتیجه بنگاه‌داری اشاره کرد که موجب کاهش کیفیت دارایی‌های بانکی جهت پرداخت تعهدات بانک خواهد شد. شرایط اقتصاد ایران و به خصوص نظام بانکی طی سالیان اخیر حاکی از وجود نشانه‌هایی از بحران بانکی در اقتصاد ایران است. با توجه به سهم بالای نظام بانکی از تامین مالی فعالیت‌های اقتصادی، در این مطالعه اثرات بحران بانکی بر متغیرهای منتخب کلان اقتصادی با استفاده از مدل تعادل عمومی پویای تصادفی در قالب دو سناریوی حدی نبود بحران و بحران در بالاترین حد با استفاده از داده‌های اقتصاد ایران طی سال‌های 1399-1360 بررسی شده است. نتایج نشان می‌دهد لحاظ قید ریسک سیستمیک در مدل‌سازی موجب کاهش اثرگذاری تکانه‌های پولی بر متغیرهای کلان اقتصادی خواهد شد. همچنین، نتایج نشان می‌دهد متغیر تولید در صورت بروز تکانه پولی در شرایط بحران بانکی نسبت به شرایط عدم وجود آن، کمتر متاثر خواهد شد که نشان‌دهنده کاهش قدرت تاثیرگذاری سیاست‌ها در شرایط بحران بانکی بر متغیرها است. بنابراین، لازم است شرایط بحرانی در حوزه بازار پول و نظام بانکی در تصمیم‌گیری‌ها مورد توجه سیاست‌گذاران قرار گیرد.

investigating the effects of monetary shocks on the key variables of iran’s economy in the conditions of the banking crisis stochastic dynamic general equilibrium model approach

purpose: pricing the banking system plays an important role in the structure of an economy, and the challenges of this sector can affect other sectors. one of the most important challenges of the banking system is the occurrence of a banking crisis. the international monetary fund defines a banking crisis as a situation in which bank runs and bank failures spread and banks are unable to pay their debts, or a situation in which the government intervenes in the banking system on a large scale. in the conditions of banking crisis, bank bankruptcies are widespread and banks are unable to pay their debts. the occurrence of this type of crisis has various causes, the main reasons of which are the high volume of non-current claims and the freezing of bank assets as a result of corporate governance, which reduces the quality of bank assets to pay the bank’s obligations, thus creating an imbalance in the banks’ balance sheets. one of the features of a banking crisis is systemic risk. an increase in the systemic risk in the banking system coincides with the occurrence of a banking crisis.systemic risk can be defined as a risk that affects the financial sector and creates an endogenous cycle that exacerbates the effect of the initial shock and causes more damage to the financial sector. with the increase of systemic risk, the probability of crisis and financial and monetary instability increases and negatively affects the real sector of the economy. in normal times, when there is no crisis, banks help the rapid development of the economy and increase the standards of living, but, when a crisis occurs, the problems in the banking sector and the subsequent failures cause serious negative consequences not only in the banking sector but also in companies directly.  it also affects investors; the occurrence of banking crises during the last few decades has always caused problems for the countries engaged in the crisis. among these problems, one may mention the financial costs of the crisis, production losses, increase in public debts, and increase in uncollectible loans. the banking industry in iran is one of the important financial intermediaries that can provide the basis for the growth and prosperity of the economy by properly organizing resources and expenses. more than 80% of the financing in iran is done through banks. therefore, the health of this sector can significantly contribute to the improvement of economic conditions. the conditions of the iranian economy and especially the banking system in recent years indicate the signs of a banking crisis in the iranian economy; the money market pressure index, as one of the most important indicators for measuring the banking crisis, has faced more fluctuations since the end of the 80s. considering the high share of the banking system in the financing of economic activities in iran and the lack of studies in the field of banking crisis and its effects on macroeconomic variables, the present research investigates the effects of systemic risk, as a representative variable of banking crisis, on the selected macroeconomic variables.methodology: in order to analyze the effects of the banking crisis on macroeconomic variables, the stochastic dynamic general equilibrium model has been used in the form of two limit scenarios referring to a no-crisis situation and the presence of a banking crisis at the highest level using the data of iran’s economy during the years 1982-2020. in this study, a stochastic dynamic general equilibrium model for a small open economy in terms of oil exports has been developed with an emphasis on iran’s economy in the framework of the new keynesian school, in which the effect of monetary impulse on macroeconomic variables in the framework of the banking crisis is investigated.