نوع مقاله : مقاله پژوهشی
نویسنده
دانش آموخته دکتری اقتصاد اسلامی، مؤسسه آموزشی و پژوهشی امام خمینی (ره)، قم، ایران.
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسنده [English]
This study investigates the asymmetric effects of fluctuations in economic growth, real liquidity, and the free-market exchange rate on the declining trend of gross fixed capital formation (GFCF) in Iran, assuming that investment responses to positive and negative macroeconomic shocks are nonlinear. To evaluate this hypothesis and account for the nonlinear nature of economic responses to expansionary and contractionary shocks, we employ the Nonlinear Autoregressive Distributed Lag (NARDL) model to analyze the disaggregated impacts of positive and negative shocks in economic growth, real liquidity, and the exchange rate on investment. The estimation results reveal the existence of statistically significant structural asymmetries in Iran’s economy. In the long run, positive shocks to real GDP growth are identified as the main drivers of investment, whereas negative liquidity shocks and exchange rate depreciation exert significant adverse effects on capital formation. Conversely, positive liquidity shocks and exchange rate appreciation have no statistically significant impact on investment. The results from asymmetric impulse response functions confirm these findings in both the short-run and long-run horizons, highlighting the substantial contribution of negative liquidity shocks and positive exchange rate shocks to the decline in investment. Furthermore, the direct effects of economic sanctions and the real interest rate on investment are found to be statistically insignificant, suggesting that their impacts are likely transmitted indirectly through the exchange rate channel. Based on the findings, adopting macroeconomic stabilization policies, with an emphasis on mitigating downside risks in monetary and foreign exchange markets, is identified as a crucial prerequisite for the sustainable recovery of investment in Iran.
کلیدواژهها [English]