Econometrics
Tofigh Beigi; Ahmad Sadraei Javaheri; Ali Hussein Samadi; Ebrahim Hadian
Abstract
Uncertainty is a controversial issue in the philosophy and methodology of economics. Since economic uncertainty is not directly observable, quantifying it is confronted with significant complexities. A common method in this context involves computing the proxy of uncertainty using time series models. ...
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Uncertainty is a controversial issue in the philosophy and methodology of economics. Since economic uncertainty is not directly observable, quantifying it is confronted with significant complexities. A common method in this context involves computing the proxy of uncertainty using time series models. Within this framework, the conditional volatility of the unforecastable components of time series is considered as an uncertainty measure. In this regard, the basic forecasting model should be specified in a way that its forecast errors lack any predictable content. In previous studies, the focus has solely been on economic and financial variables in computing the uncertainty measure, while the role of institutional factors has been neglected in the forecasting model. Meanwhile, based on economic literature, institutions play an important role in controlling and reducing uncertainty. Therefore, in the present study, the economic uncertainty measure is extracted based on a Large-dimensional dynamic factor model, employing a set of 72 macroeconomic and institutional time series for the Iranian economy. The results indicate that overlooking institutional factors in the forecasting model can lead to an overestimation of economic uncertainty. Our perspective enhances the accuracy of uncertainty measurement and provides a more comprehensive understanding of the determinant factors of economic uncertainty.
International Economics
Mahdi Hemmati; Ebrahim Hadian; Ali Hussein Samadi; Ahmad Sadraei Javaheri
Abstract
Exchange rate misalignment has involved many world countries. It has profoundly affected the internal and external sectors of the economy. Hence, disclosing the emergence and formation causes of the misalignments is a requisite. Studies on the Iranian economy have mostly evaluated the sanctions’ ...
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Exchange rate misalignment has involved many world countries. It has profoundly affected the internal and external sectors of the economy. Hence, disclosing the emergence and formation causes of the misalignments is a requisite. Studies on the Iranian economy have mostly evaluated the sanctions’ efficacy on macroeconomic variables, involving the economic growth, domestic production, liquidity, exports, imports, oil price, oil revenues, etc. Few studies have evaluated the sanctions’ impact on the foreign exchange market. There is no research work assessing the sanctions’ impact on exchange rate misalignment in Iran. The main purpose of this paper is to estimate the impact of economic sanctions on real effective exchange rate (REER) misalignment in the context of the Iranian economy during the period 1996:1 - 2019:4. In doing so, at first we apply the model designed by Edwards (1989) and Cottani et al. (1990) and using smooth transition regression (STR) to estimate the REER equilibrium and its misalignment. Moreover, factor analysis is used to estimate the sanction indices. Then to analyze the impact of economic sanctions on the REER misalignment a nonlinear autoregressive distributed lag (NARDL) model is employed.The time path of estimated REER misalignment indicates a lot of volatilities during the period of study. The estimated results also show that sanctions significantly affect these volatilities in the short run and long run and thereby increase REER disequilibrium in the Iranian economy.
Iman Rousta; Ebrahim Hadian; Ali Hussein Samadi; Parviz Rostamzadeh
Abstract
The purpose of this paper is to investigate the optimal monetary and fiscal policies with emphasis on a non-inflationary exit from economic stagnation in Iran. In the first stage, Iran’s economy has been modeled in the form of a New Keynesian Dynamic Stochastic General Equilibrium model (NK-DSGE). ...
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The purpose of this paper is to investigate the optimal monetary and fiscal policies with emphasis on a non-inflationary exit from economic stagnation in Iran. In the first stage, Iran’s economy has been modeled in the form of a New Keynesian Dynamic Stochastic General Equilibrium model (NK-DSGE). After modeling and extracting the system of equations, the structural parameters of the model have been estimated by using seasonal data from 1989 to 2016 and also the Bayesian approach. The results show that monetary and fiscal expansionary policies increase production though they are associated with inflation. In the second stage, the optimal monetary and fiscal rules have been extracted from a social loss function, and accordingly the conditions of a non-inflationary exit from stagnation have been investigated. The results of the simulation show that the optimal monetary policy cannot by itself lead to the exit of the economy from stagnation without inflation. However, if this policy is applied along with an optimal fiscal policy, a non-inflationary exit from economic stagnation can be achieved.
Ali Hussein Samadi; Sara Togha
Abstract
Entrepreneurship is influenced by many factors and environments such as institutions. Institutions have an important role to play in the individual's tendency toward necessity and opportunity entrepreneurship. The purpose of this paper was to examine the impact of institutional quality (property rights) ...
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Entrepreneurship is influenced by many factors and environments such as institutions. Institutions have an important role to play in the individual's tendency toward necessity and opportunity entrepreneurship. The purpose of this paper was to examine the impact of institutional quality (property rights) on opportunity and necessity entrepreneurship. The results, based on unbalanced panel data from 2005 to 2015, showed that property rights did not have a significant effect on the opportunity entrepreneurship in the factor-driven group while it had a negative impact on necessity entrepreneurship. In the efficiency-driven group, protecting property rights would provide the perfect context for opportunity entrepreneurship and reduce necessity entrepreneurship, but in the innovation-driven group, strengthening property rights increased both opportunity and necessity entrepreneurship. These results indicate that the impact of property rights on (opportunity- and necessity-) entrepreneurship depends on the level of economic development of countries.
Parviz Rostamzadeh; Ali Hussein Samadi; Zeinab Yadegar
Abstract
Banking system is considered as one of the most important economic sectors of every country. Because of the dependency between the performances of different sectors in economy, instability in banking sector will lead to disorder in all the other economic sectors. Marketization can influence banking stability. ...
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Banking system is considered as one of the most important economic sectors of every country. Because of the dependency between the performances of different sectors in economy, instability in banking sector will lead to disorder in all the other economic sectors. Marketization can influence banking stability. The primary objective of the present study is to investigate the relationship between marketization and banking stability in Iran. This study investigates the effect of institutional quality on the relationship between marketization and banking stability. Accordingly, the Generalized Method of Moments (GMM) and Panel Threshold Regression (PTR) techniques were used to estimate the models. The results of GMM indicated a decrease in banking stability after marketization. An improvement in institutional quality, however, could improve the relationship between marketization and banking stability. The results obtained by the PTR analysis revealed that institutional quality had a threshold value which could affect the relationship between marketization and banking stability and led to different relationships between marketization and banking stability under different regimes
Ali Hussein Samadi; Ali Hussein Ostadzad
Abstract
Abstract The main purpose of this paper is to obtain the optimal amount of expenses of government relating to the protection of property rights (PPRs). To achieve these purposes we have introduced concept of social intelligence with respect to PPRs and then developed different growth model from existing ...
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Abstract The main purpose of this paper is to obtain the optimal amount of expenses of government relating to the protection of property rights (PPRs). To achieve these purposes we have introduced concept of social intelligence with respect to PPRs and then developed different growth model from existing literature. In the second step the optimal share of government spending on the PPRs is calculated. The theoretical results show inverse relationship between budget deficits and government spending in the PPRs. In other words, with increasing amount of government deficit, government reduced spending of PPRs. The results of calibration for Iranian economy show that, the growth rate of spending to PPRs should be equal to 31 percent for having sustainable economic growth rate of 6 percent.
