جستجوی مقالات مرتبط با کلیدواژه "الگوی تلاطم تصادفی" در نشریات گروه "اقتصاد"

Generalized non-performing loans ratio (GNPLs) is empirically considered as a key prudential soundness indicator which is computed by the ratio of non-performing loans (overdue loans, arrears, doubtful loans, and rescheduled loans) to the total outstanding loan that also affects banks’ lending capacity. The GNPLs is evidently influenced by the macro systematic shocks (GDP growth, foreign exchange rate, inflation, and lending interest rate) which are statistically examined for a sample bank. In this regard, the impact of four systematic shocks on the GNPLs is estimated by a Vector Autoregressive (VAR) model during 2003-2020. In this context, the Impulse Response Function (IRF) of GNPLs is also examined against four contingent shocks while instantaneously variance decomposition of the GNPLs is estimated for the short and long term. The impact of the first and second moments of the shocks on GNPLs is estimated by the Multivariate Stochastic Volatility Model as well. The IRF output indicates that the GNPLs grows due to the shocks of exchange rate depreciation, GDP reduction, and inflation growth in the short time, while lending rate insignificantly affects the GNPLs owing to low historical volatilities as well as big arbitrages among bank lending rates for different economic sectors. The GNPLs Variance Decomposition highlights that GDP growth and inflation affect the GNPLs deviations in the short run, while the foreign exchange rate constantly motivates the GNPLs in the long run. In other words, the foreign exchange rate has strongly affected the GNPLs deviations in the long run, owing to its role as a nominal anchor and financial stability indicator in the macroeconomic environment. The GNPLs high Volatility which is estimated by conditional variance is also recognized in five different periods (2003, 2007, 2010, 2016, and 2019), mainly because of the foreign exchange rate unification in 2003, monetary expansion for self-employed loans in 2007, international sanctions in 2010, and 2009, as well as assets market recession in 2016 respectively. In this regard, the GNPLs deviations have also strongly correlated with output growth and foreign exchange rate Volatility.

The main purpose of this paper is to examine the effects of financial integration on macroeconomic volatility in Iran. Economic theories do not clearly explian the effects of financial integration on macroeconomic volatility and this is essentially an empirical problem. Hence, we have presented an empirical model to test the effect of international financial integration on macroeconomic volatility in Iran over the period 1352-1395. For this purpose, first, the macroeconomic uncertainty was extracted using stochastic volatility model with leverage effects and using the principal component analysis method. The results show that in the long run, international financial development, international financial integration and terms of trade volatility have a positive effect on macroeconomic volatility in Iran, while the effect of trade openness on macroeconomic volatility in Iran is negative. In addition, in the short run, there is no significant relationship between the relevant variables and macroeconomic volatility.

One of the foundations for development and economic growth is the expansion of private sector investment. It is necessary to pay attention to the relevant variables in this regard and to examine their role. Therefore, this study examines the role of macroeconomic uncertainty and public expenditure in determining private investment in Iran based on seasonal and annual data during 1368-1394. For this, first, the macroeconomic uncertainty was extracted using stochastic volatility model. Then, to investigate the effect of macroeconomic uncertainty and public expenditure on private investment, we usedMixed frequency Data Sampling (MIDAS) approach. The results showed that the increase of macroeconomic uncertainty as well as the increase of GDP have negative and positive effectson the private sector investment in Iran, respectively. Furthermore, the public consumption expenditure has a negative and significant effect on private sector investment and significant effect on private sector investment and significant effect on private sector investment