impulse response functions

This paper investigates the relative contributions of nominal exchange rates and relative price adjustments toward PPP in a VECM framework in Iran. In conducting empirical tests, annual time series data were used covering the period of 1357 to 1401. The cointegration test indicates the existence of a long-run cointegrating relationship between the nominal exchange rate and relative price. Also, the adjustment speed coefficient of the real exchange rate resulting from the difference in the adjustment speeds of the variables of the VECM model is around -0/2. This value indicates the slow adjustment process in such a way that it is expected that 80% of the current period's deviation from purchasing power parity will remain for the next year. On the other hand, the evidence from impulse response functions shows that relative price shocks lead to much longer real exchange rate deviations than nominal exchange rate shocks. Also, the nominal exchange rate in response to the relative price impulse is slowly on its long-term equilibrium path; While the relative price reacts to the impulse of the nominal exchange rate, it is placed on the path of its long-term equilibrium at a faster rate. In general, it can be said that to establish purchasing power parity, the relative price will play a more important role than the nominal exchange rate. Thus, Iranian policymakers must pay attention to price stabilization and the reduction of high inflation rates through appropriate macroeconomic policy.

Aim and Introduction :

The pension system is of special place in the employment regulations of the private and public sectors of all countries of the world. In addition, pension funds are known as one of the most sensitive and complex financial institutions in today's world, whose main goal is to preserve the livelihood and dignity of people in old age. Pension funds have been created to provide social rights for citizens, and a long-term horizon is one of the main features of such funds. By receiving insurance premiums from the insured and investing the resources gathered in the early years and the so-called youth period of the fund, pension funds provide pensions for retirees during their maturity. The process of maturity of pension funds occurs naturally and if it is accompanied by the aging of the country's population, it will intensify. According to the International Monetary Fund, pension expenditures in the Social Security Organization and the civil serpents' Pension Fund will increase from 5.3% in 2015 to 11% in 2040 and 19.6% of GDP in 2080 and in the future, a large part of the country's budget should be spent on paying pensions.

This study seeks to simulate and apply corrective policies to improve the financial misalignment in the Iranian pension system using dynamic stochastic general equilibrium (DSGE) model based on the overlapping generations (OLG) model. In this regard, impulse response functions were used to examine the effects of the proposed parametric corrections. The DSGE models are stochastic, microeconomic-founded, provide the possibility of dynamic evaluation of parametric changes as well as random changes of exogenous variables of the system, and give inter-temporal optimization of the behavior of economic agents. In addition, the mechanism of intergenerational transfer in the pension funds, can be well evaluated and studied by these models, so it seems to be a suitable tool for studying the effects of demographic parametric changes on the financial balance of pension funds.

The results show that positive shocks to the variables of years of service, birth rate, and average years of insurance, the financial misalignment of pension funds decreases. According to the results, linking the retirement age with life expectancy and increasing the years of premium payment can reduce financial misalignment and increase financial stability in the Iranian pension system.

The government's decision to implement reforms in Iran's pension system is essential, taking into account social considerations and the step-by-step nature of these reforms. However, according to our findings, the following policies should be presented to improve the financial imbalance of Iran's pension system:1. The results of the positive shock analysis to the years of service variable showed that the later retirement of people reduces economic dissatisfaction, and considering the past and projected increase in life expectancy in Iran, increasing the retirement age is justified and logical. According to global experience, the average retirement age should be increased from 60 to 63 years for men and from 55 to 58 years for women (one year for every two years). Also, in the future, it is suggested that the average retirement age be linked to the growth of life expectancy.2. The analysis results of the positive shock to the birth rate variable showed that the young population reduces the financial imbalance. Therefore, it is necessary to implement policies to encourage birth in the coming years, because the population aging phenomenon will have destructive effects on the stability of the pension system.3. A positive shock to the average variable of years of insurance has positive effects on reducing the financial imbalance of pension funds. In this regard, it is suggested to change the calculation of pensions in all pension funds, including state, military, and social security organizations, based on the average salary of the last three to five years of employment, which it is currently based on the average of the previous two years.

Today, the share of government aid from the public expenditures to support military and civil servants' pension funds has increased from about 11% in 2013 to 19% in 2021 and this trend has been increasing in recent years. This study aims to use DSGE models to simulate and apply corrective measures to enhance the financial misalignment of Iran's pension system. For this purpose, the model has been calibrated once for the PAYG-DB system that is currently used in Iran and then for the system based on financial provision based on the amount of partial savings to compare their welfare and distributional effects. The simulation results show that people reduce their savings by switching to a partial savings system, which increases consumption in all generations and capital accumulation in the whole society. In the second part of the article, impulse response functions were used to investigate the effects of emerging diseases and population aging variables on the financial misalignment of pension funds. The results show that the financial misalignment of pension funds increases following the positive shock in the above variables. Based on the results, parametric reforms such as a mechanism linking the retirement age to life expectancy and transition to a partial savings system can reduce financial misalignment and increase financial sustainability in Iran's pension system.

Extensive subsidies and excessive energy consumption have necessitated the need to reform consumption pattern and price. The present study seeks to investigate the effects of energy carrier price reform on important macroeconomic variables and for this purpose, a small open New- Keynesian DSGE model has been calibrated and simulated for Iran. The results of impulse response functions analysis show that the detrimental effects on household consumption, enterprise investment, non-oil production and total output as a result of positive price shocks in energy carriers can negatively impact Iran's economy for at least 30 periods. A accelerated decline in investment over the course of nine periods and a return to a stable level over 25 periods can also be a crisis. Therefore, the need for complementary policies to encourage investment and counteract price increases, as well as the role of the government in efficient subsidies redistribution and infrastructure investment, can be extremely important.

The aim of this article is to analyzing the effect of shocks of fiscal consolidation policy on the macroeconomic variables of Iran. In this regard by using Factor Augmented Vector Auto Regression (FAVAR) method the effect of shocks on government revenues and expenditures on important macroeconomic variables including total real GDP growth, inflation, private consumption growth and investment growth over the period 1984:1 -2015:4 is investigated.
The results of research models show that the effect of fiscal consolidation policy on the macroeconomic variables are different, and it is difficult to provide a same policy tool to effect all variables. Thus with emphasis on real GDP growth which is a major factor that affects other macroeconomic variables, it can be noted that in short term which consists of 4 seasons, reducing public expenditures and increasing government revenues lead to a reduction in production in response to a negative reaction to investment and private consumption and inflation will decrease. Therefore in the short term the suitable policy for fiscal consolidation is a combination of expenditure cut and income rising and in particular, the policy of reducing current expenditure and increasing import taxes. In the medium and long term, respectively consist of 8 and 16 seasons, real GDP growth responses positively to the expenditures cut policy, decline in current expenditures and social public expenditures is introduced as an instrument of fiscal consolidation policy.

The aim of this paper is to examine the impact of government fiscal policies on income distribution. For this purpose FAVAR method and quarterly data for the time period of 1393:q4-1369:q1 for 99 macroeconomic variables have been used. Impulse response functions show that a positive shock as size one standard deviation in government current expenditure, increases Gini coefficient and as result worsens income distribution. While, government development expenditure as well as direct and indirect taxes shocks reduce Gini coefficient and improve income distribution. According to the Findings, the government can reduce income inequality by reducing unproductive costs, increasing targeted development spending and improving tax system.

The main objective of this study is to investigate the effects of oil shocks on GDP، prices level، money and exchange rates in Iran by using the structural vector error correction (SVEC) approach model covering the period 1980Q2-2010Q1. The findings of this study reveal that positive shock in oil real price has significant and positive effect on the real GDP in the short، medium and long. The impact of oil price shocks on domestic prices in the short، medium and long term is negative and significant، such as creating a positive shock to the real price of crude oil، reduce the domestic price. In addition، a positive shock to the real price of crude oil has the negative effect of the exchange rate in the short، medium and long term. However، the impact of oil price shock on the real exchange rate is permanent. Imports also will increase، due to the increase in wealth and demand for intermediate products. On the other hand، a positive shock to the real residual money in the short run cause to immediate increases in real out put.

The minimum wage determination is one of the most significant economic issues exerting effects on macroeconomic variables. This study provides an empirical model using VAR method to analyze the long run relationships and short run dynamisms of factors affect general price level (with emphasis on minimum wage) during the period of 1978-2010. To examine long run relationships we used Johansen-Juselius Co-Integration method and we also applied impulse response functions and variance decompositions to see how the short run dynamisms work. The results indicate that though minimum wage does not play a considerable role in explaining price level variations in Iran’s economy، price level is able to explain minimum wage variations properly.

Since the way by which the 2nd phase of Subsidies Targeting Plan is to be implemented، the levels of liberalization of the prices of energy carriers and the shares of different sectors in the total subsidies are not clear yet، and also due to the lack of up-to-date macroeconomic statistics required to study the immediate and short-run effects of the plan on Iranian tax revenues، in this article we have employed Vector Autoregressive Model (VAR) to answer the research question. At the same time، for the purpose of analyzing the dynamic interactional effects of the shocks created، we have resorted to the Forecast Error Variance Decomposition Functions (FECDs)، as well as the Impulse Response Functions methods for the period 1987-2012. The results obtained from the Impulse Response Functions Method indicate that in general، the elimination or decrease of subsidies (i. e. targeting subsidies) would lead to a decrease in tax revenues. Moreover، as for the tax sub-parts، the results of the model show that the direct taxes in fixed prices would be decreased upon the implementation of the Plan. On the other hand، the effect of a decrease in the amount of subsidies paid has led to an increase in the indirect taxes as equal to one unit of standard deviation in the first period while it is assumed to result in a decrease of indirect taxes in the second period and is expected to be eventually neutralized in subsequent periods