Research Paper
Morteza Khorsandi; Mahnoush abdollahmilani; Teymur Mohamadi; pardis hejazi
Abstract
The effect of income on subjective-wellbeing (as one of the criteria for measuring mental well-being) has been considered in many studies but various dimensions of this effect have not yet been studied. The study aims to investigate the nonlinear effect of income on the subjective-wellbeing of 58 selected ...
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The effect of income on subjective-wellbeing (as one of the criteria for measuring mental well-being) has been considered in many studies but various dimensions of this effect have not yet been studied. The study aims to investigate the nonlinear effect of income on the subjective-wellbeing of 58 selected countries during 2005 to 2020, which has been studied in two scenarios. For this purpose, a PSTR model developed from regime change models has been used. In the present study, the effects of income, unemployment, inflation, life expectancy, and income inequality on subjective-wellbeing have also been investigated. According to the obtained results, in a nonlinear relationship, the effect of GDP on subjective well-being at a certain threshold value of income inequality is decreasing. Therefore, if increasing national income and reducing income inequality as a factor affecting welfare is considered by politicians, it is also important to note that reducing inequality from a certain threshold onwards reduces the impact of income on welfare. This means that from a certain threshold on income inequality, the focus of governments on reducing income inequality should be reduced so that resources are spent on essentials.
Research Paper
Habib Morovat; Ali Asghar Salem; shayan mohammadsharifi
Abstract
Several factors are effective in the growth and development of the stock market. One of these factors is the behavior and performance of individual investors in these markets. Individual investors are interested in investing in the stock market for various reasons, such as long-term capital growth, dividends, ...
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Several factors are effective in the growth and development of the stock market. One of these factors is the behavior and performance of individual investors in these markets. Individual investors are interested in investing in the stock market for various reasons, such as long-term capital growth, dividends, and hedging against the decline in purchasing power caused by inflation. But their performance in this market, in addition to the general economic and stock market conditions, depends on the individual characteristics of the investor. Therefore, in this study, an attempt has been made to determine the significance of demographic characteristics such as age and gender, risk-taking and degree of patience, behavioral biases such as overconfidence and loss aversion, and investment characteristics such as experience and investing skill, and frequency of portfolio restructuring on the individual investor performance in the Tehran stock market. For this purpose, using systematic sampling, the required information was collected from 240 questionnaires from the population of individual investors in the Tehran stock market. Data analysis using the ordinal logit model showed that the variables of age, gender, and degree of risk taking do not have a significant effect on the performance of real investors. The degree of patience of people has a positive and significant effect on the performance of investors, and more patient people get more returns. Overconfidence and loss aversion have a negative and significant effect on investors' performance, and finally, investment experience and skill have a positive and significant effect on investors' performance.
Research Paper
Ali Nassiri Aghdam; mahtab moradzadeh
Abstract
The leverage ratio indicates companies relative reliance on capital and debt. The higher leverage ratios and the more intensive reliance on debt relative to equity, ceteris paribus, increases companies' financial risks. The purpose of this study is to evaluate the effect of income tax and deductible ...
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The leverage ratio indicates companies relative reliance on capital and debt. The higher leverage ratios and the more intensive reliance on debt relative to equity, ceteris paribus, increases companies' financial risks. The purpose of this study is to evaluate the effect of income tax and deductible financial costs on companies' leverage ratios. To investigate this issue, companies listed on the Tehran Stock Exchange were studied from 2011 to 2020. Theoretically, the higher the effective tax rate and deductible financial costs, the higher the leverage ratio is. These hypotheses were tested by employing the dynamic panel data model and the generalized least squares (GLS) method. Results show, by accounting for control variables, the effective income tax rate has no significant effect on the leverage ratio, but financial costs hold a positive and significant relationship with the leverage ratio.
Research Paper
rana abbasgholi nezhad asbaghi; Hossein Samsami Mazrae Akhoond
Abstract
Recently, some monetary policymakers have attributed the high inflation in the Iranian economy solely to the independence of the central bank, arguing that to reduce the inflation rate, the central bank must operate independently. However, empirical studies indicate that the independence of the central ...
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Recently, some monetary policymakers have attributed the high inflation in the Iranian economy solely to the independence of the central bank, arguing that to reduce the inflation rate, the central bank must operate independently. However, empirical studies indicate that the independence of the central bank faces structural challenges due to the Endogenous money within Iran's economy. Therefore, the purpose of this article is to identify the components of the requirements of central bank Independence, with an emphasis on the government structure in Iran's economy. To achieve this, a review of existing literature on central bank independence was conducted, and the grounded theory approach was employed to reach theoretical saturation regarding the relevant categories related to the issue of central bank independence in Iran's economy. Subsequently, using the Bayesian model averaging method and analyzing 21 variables, the study identified key factors that define the requirements for central bank independence in Iran. These factors include the deviation of the effective exchange rate from the appropriate exchange rate, the government budget deficit, oil revenues, and the government effectiveness index. Additionally, the results indicate that merely increasing the indicators of the central bank independence, in the context of variables that contribute to the endogeneity of money under the current conditions of the Iranian economy, has a weak and fragile effect. Therefore, it is essential to implement structural reforms addressing each of these critical variables before discussions on independence can be effectively undertaken.
Research Paper
Taha Shishegari; farhad ghaffari
Abstract
Conventional economics asserts that the presence of arbitrage in financial markets compels market participants to behave rationally in order to maximize profits. This assumption forms the foundation of the Efficient Market Hypothesis (EMH). In recent years, behavioral economics has questioned the assumption ...
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Conventional economics asserts that the presence of arbitrage in financial markets compels market participants to behave rationally in order to maximize profits. This assumption forms the foundation of the Efficient Market Hypothesis (EMH). In recent years, behavioral economics has questioned the assumption of efficiency and rational behavior in financial markets through studies that found a significant impact on financial markets from seemingly irrelevant factors such as weather conditions, air temperature, and pollution. This research aims to compare the explanations of these two views by analyzing daily data from the Tehran stock market index during two periods: February 20th, 2022 to February 19th, 2023 and February 20th, 2023 to February 19th, 2024.For this study, we utilized daily data on the growth rate of the dollar as an explanatory variable for the total capital market index growth in the conventional economic view. In the behavioral view, we included variables such as air temperature, weather conditions, and pollution index as explanatory variables. Given the nature of financial markets, we employed the EGARCH method.
The results of this research indicate that during the period from February 20th, 2022 to February 19th, 2023, when the dollar rate showed a significant upward trend, the explanatory power of behavioral variables decreased, with some losing their significance in explaining the total index. However, during the period from February 20th, 2023 to February 19th, 2024 (when the exchange rate was relatively stable), behavioral variables had a significant impact on the total index.
Research Paper
amirhosein poureh; abbas hatami
Abstract
More than three decades have passed since the development policy in Iran after the Islamic revolution. However, Iran is still in the fourth quarter of development and the first quarter of underdevelopment. Although development and underdevelopment cannot be reduced only to policymaking, but policymaking ...
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More than three decades have passed since the development policy in Iran after the Islamic revolution. However, Iran is still in the fourth quarter of development and the first quarter of underdevelopment. Although development and underdevelopment cannot be reduced only to policymaking, but policymaking has always been seen as one of the factors affecting development. Based on this, this research tries to understand the reasons for the failure of development policy in Iran from the point of view of experts and officials of development policy using Grounded Theory. Based on this, a semi-structured interview was conducted with 22 experts and managers of development policy, and the interviews were analyzed through three stages of coding: open, axial, and selective. In this analysis, 629 primary concepts were obtained, which were reduced to 78 sub-categories, then 24 main categories and finally a core category. The core category of the research showed that the development policy in Iran suffers from a triangle of inefficiencies, including the inefficiency of governance, the inefficiency of the social structure, and the inefficiency of the elite order, which is not separate but intertwined, in an articulated triangle, and the inefficiency of development policy have formed in Iran. This situation shows the formation of a kind of ominous triangle in development policy in Iran. It emphasizes that if this situation continues, Iran will be involved in a kind of double underdevelopment and suspension of sustainable development.
Research Paper
Fariba Rashnoo; Ahmaf Sarlak
Abstract
In the conditions of economic complexity where the production of goods and services is done with high technologies and with great variety, achieving economic growth without pollution is considered one of the most important goals of the countries of the world. This requires measures such as investment ...
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In the conditions of economic complexity where the production of goods and services is done with high technologies and with great variety, achieving economic growth without pollution is considered one of the most important goals of the countries of the world. This requires measures such as investment in knowledge-based production, which itself requires investment in research and development. Therefore, in this research, the relationship between multidimensional economic complexity and comprehensive green economic growth has been investigated. Since a number of developed and developing countries are geographically neighboring each other, in this research the spatial panel econometric method and the data of these countries have been used. The results show that there is a significant relationship between inclusive green growth and economic complexity, both in developing countries and in developed countries, and the intensity of this relationship is relatively less in developing countries.
Research Paper
Hossein Tavakolian; reza talebloo; Shaghayegh Abasali
Abstract
Despite, the measures for improvement of the State budget system in the current economic situation in Iran, no improvement has been taken. As, the relationship between beneficiaries of the budget included the government, parliament, regulatory bodies, and people as the final beneficiary of budget, has ...
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Despite, the measures for improvement of the State budget system in the current economic situation in Iran, no improvement has been taken. As, the relationship between beneficiaries of the budget included the government, parliament, regulatory bodies, and people as the final beneficiary of budget, has not regulated properly, therefore, transparency and accountability of the various officials of the government has been decreased. In this paper, we study budgetary and off-budgetary operation of the government and its impact on inflation with emphasis on fiscal dominance via banking system, using Generalized Methods of the Moments (GMM) trough 1372-1397. The results indicate that increasing the fiscal dominance via the debt channel of banking system has positive effect on inflation thus, fiscal dominance via banking system has been proved. Also, the results confirm the negative relationship between political stability and control of corruption on inflation. This variable has been in a low level during the sample period which requires the attention of government in all areas and political factions of country.
Research Paper
mahya allahgholi; Farshad Moameni
Abstract
Considering the economic complexity index as a development index due to its greater estimation power in predicting economic growth and income inequality compared to similar indices, along with shortcomings such as the inability to express the difference in the complexity levels of economies, it makes ...
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Considering the economic complexity index as a development index due to its greater estimation power in predicting economic growth and income inequality compared to similar indices, along with shortcomings such as the inability to express the difference in the complexity levels of economies, it makes the theoretical model to explain this index inevitable. In the social orders approach, the type of social order is mentioned as the difference between developed and developing economies, and in this article an attempt has been made to identified determinants of this index. In this study by descriptive analytical method the state of property rights, the business environment and the type of people`s access to organizations are known as three variables affecting this index. analyzing Iran`s economic complexity index during 10-period (2010-2020) and three indexes, international property rights, ease of doing business and economic freedom, respectively as an estimation of those variables, shows that the international property rights index has a stronger positive relationship with the economic complexity index than the other two indices.
Research Paper
mohammad ali dehghandehnavi; meysam Amiri; Amin Khorshidsavar
Abstract
Banks play a crucial role in maintaining the financial stability within an economy. Their importance stems from the various functions and roles they perform contributing to the overall stability and growth of the financial system. On the other hand, the importance of banks for real economic growth lies ...
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Banks play a crucial role in maintaining the financial stability within an economy. Their importance stems from the various functions and roles they perform contributing to the overall stability and growth of the financial system. On the other hand, the importance of banks for real economic growth lies in their role as financial intermediaries that facilitate the efficient allocating of capital, supporting businesses and individuals, and contributing to the overall stability and development of the economy. This research has investigated the factors affecting banks' risk-taking with emphasis on monetary policy, regulatory, and macroeconomic variables in 16 banks in Iran during the years 2011 to 2023. In this study, two models are used and the estimation method is GMM. The results of the research show that there is an inverse relationship between monetary policy and risk-taking. While capital adequacy ratio (regulatory) and GDP growth rate have a positive effect on risk-taking, the relationship between inflation rate and risk-taking is inverse.
Research Paper
samira ghanbari; Hamid Amadeh; Davood Danesh Jafari; teymoor mohammadi
Abstract
Today, financing through health insurance is known as one of the most important sources of financing in the health sector. In this regard, improving the level of satisfaction of the insured and increasing their access to medical services are among the most important goals of health insurance organizations, ...
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Today, financing through health insurance is known as one of the most important sources of financing in the health sector. In this regard, improving the level of satisfaction of the insured and increasing their access to medical services are among the most important goals of health insurance organizations, and organizations that provide access to suitable services without imposing a financial burden on their insured will be successful. For this purpose, the balance in the revenue sources and expenses of the organizations in question is very important. the purpose of this research is to examine the budget balance in five funds of Iran Health Insurance Organization during the period of 2008-2019 using monthly data and also to analyze the factors affecting the budget deficit of these funds including premiums, coinsurance, treatment and overhead costs and the number of services purchased by various funds of Iran Health Insurance Organization, from the perspective of their mediating role in reimbursement, behavior management and purchasing medical services, using by panel vector error correction model, in order to provide a solution to eliminate the budget deficit. The obtained results showed that in the long run, coinsurance paid by the insured and the premium paid to different funds of Iran Health Insurance Organization had a negative effect on the budget deficit of the mentioned funds. In contrast, the increase in treatment and overhead costs and the number of services purchased by Five funds of Iran Health Insurance Organization exacerbated the problem of budget deficit of these funds.
Research Paper
mohaddaseh soleimani; Aliasghar Banouei; Esfandiar Jahangard; teymor mohamadi
Abstract
Innovation and technological changes spans various geographical locations over the time.The inability of Input-Output models in measuring the effects of technology changes, caused by new innovations, is known as a weakness of these models. In this article, we show how this weakness can be addressed by ...
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Innovation and technological changes spans various geographical locations over the time.The inability of Input-Output models in measuring the effects of technology changes, caused by new innovations, is known as a weakness of these models. In this article, we show how this weakness can be addressed by employing the fields of influence method. Technology changes are modeled as changes of one or more elements in the direct coefficients matrix and the impact of such changes in the Leontief matrix is measured. Here is the main question: Does the technology changes only impact a limited sector or the entire economical system? In other words, how would technology changes in one sector impact other sectors of economic system? The main goal in this paper is proposing a method which can measure how different sectors get impacted by changes at different levels such as one element, all elements, one row or one column and then evaluates the importance of different sectors. To this aim, Iran’s Input-Output tables over the period of 1365-1395 with the fixed price of Iran’s statistics center in 1390 is used. The impact of technology changes on each sector is measured using Leontief’s inverse matrix and the column field of influence approach (CFOI) approach. Our findings indicate that over this period of time, technological changes in the industry and then construction sectors have the most influence and the mining sector has the least influence on other sectors of Iran’s economy.
Research Paper
Mohammad Feghhi Kashani; Teymor Mohammadi; hadi pirdaye
Abstract
Corporates adjust their information voluntary disclosure according to the volatilities they experience in their cash flows. The purpose of this study is to investigate the effects of news concerning risk, ambiguity level, and investors' ambiguity aversion on the policy adopted by firms as to the voluntary ...
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Corporates adjust their information voluntary disclosure according to the volatilities they experience in their cash flows. The purpose of this study is to investigate the effects of news concerning risk, ambiguity level, and investors' ambiguity aversion on the policy adopted by firms as to the voluntary disclosure (conservative or non-conservative) of soft and hard information in the digital industry subset of Tehran Stock Exchange within the period of 2012-2022. Further, we have used the corporate voluntary disclosure lag to capture the disclosure dynamics along with the control variables including the cost of capital, financial leverage and stock liquidity by dynamic panel models to explain the voluntary disclosure behavior of soft and hard information of the corporates. The results indicate that managers of companies active in the digital industry, depending on the type of information available to them for voluntary disclosure conservatively or non-conservatively, respond differently to the news related to risk, ambiguity and ambiguity aversion of investors. That could be due to the nature of the disclosed information (credibility of information for investors). Likewise, the findings confirm the increasing effects of voluntary disclosure of previous periods on the disclosure of subsequent periods, which somehow confirms the existence of inertia in voluntary disclosure policies in the studied industry.
Research Paper
Hossein Esfandiar; teymoor mohammadi
Abstract
Thanks to Blockchain technology the future of banking can take place without intermediaries (especially banks), and in this regard, Central Bank Digital Currency (CBDCs) and stablecoins of BigTechs are mentioned as the main competitors of the new monetary era. Based on this fact and in parallel with ...
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Thanks to Blockchain technology the future of banking can take place without intermediaries (especially banks), and in this regard, Central Bank Digital Currency (CBDCs) and stablecoins of BigTechs are mentioned as the main competitors of the new monetary era. Based on this fact and in parallel with the efforts of most countries on the (theoretical and experimental) investigation of CBDC’s aspects, this article, using a dynamic stochastic general equilibrium (DSGE) model, in the period Q1 1388 to Q4 1400, economic effects of issuance of RamzRial (Iranian CBDC) was modeled and analyzed. In our model, RamzRial is an account-based, widely available to the general public, interest-bearing and cash complementary money, and the results of the implementation of quantitative and price rule policies were examined in the presence of RamzRial. The results of the model based on the data and calibration indicate that the issuance of RamzRial, while diversifying central bank tools, will improve the effectiveness of monetary policies in the event of (supply and demand) external shocks. One of the significant results, especially for the stagflation condition of Iran’s economy, says that through issuing (an appropriate amount of) RamzRial the central bank can implement disinflation programs while reducing its unwanted negative effects on production. Also, in addition to influencing the level of production, consumption, investment and employment, the results of our model prove that with the introduction of the RamzRial in parallel with cash balances, the most important factor affecting the transmission mechanisms is the dynamics of transaction cost deviations.
Research Paper
Reza Taleblou; Parisa Mohajeri; Abbas Shakeri; teymoor mohammadi; zahra zabihi
Abstract
Achieving the correct insight into the structure of connectedness and the spillover of volatilities between different stock exchange industries plays an important role in risk management and forming an optimal stock portfolio. Also, the analysis of inter-sectoral connectedness helps policy makers in ...
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Achieving the correct insight into the structure of connectedness and the spillover of volatilities between different stock exchange industries plays an important role in risk management and forming an optimal stock portfolio. Also, the analysis of inter-sectoral connectedness helps policy makers in designing policies that stimulate economic growth and implementing preventive measures to curb the propagation of systemic risk. In this regard, this article tries to use the data of 3370 trading days during the period of 1388/07/01 to 1402/06/31, encompassing 20 stock market industries (which constitute more than 80% of the Iranian stock market) and applying the connectedness approach based on the vector autoregression model with time-varying parameters (TVP-VAR), to estimate the systemic risk and volatility connectedness of the stock market network. In addition, we implement the minimum connectedness approach in the optimal stock portfolio and compared its performance with two other conventional approaches. The findings reveal that, first; the systemic risk in Iranian stock market is significant and has reached unprecedented figures of 80% in the last three years. Second, the four major export industries (petrochemicals, metals, mining and refining) experience the strongest pairwise connectedness, and among them, base metals appear as one of the most important transmitters of volatilities to the entire stock network. Thirdly, the stock portfolio based on the minimum connectedness method, compared to the minimum variance and minimum correlation methods, shows a better performance based on the criteria of cumulative return and hedge ratio efficiency.
Research Paper
somayeh nematollahi; Farshad Moameni; Alireza Garshasbi
Abstract
This article aims to investigate the effect of regulatory level on the growth of industrial added value and compare it in developed and developing countries. For this purpose, the estimation of a non-linear equation with the panel GMM method and delta method has been used for the years 2000 to 2019. ...
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This article aims to investigate the effect of regulatory level on the growth of industrial added value and compare it in developed and developing countries. For this purpose, the estimation of a non-linear equation with the panel GMM method and delta method has been used for the years 2000 to 2019. The estimation results in a sample of 99 countries show an inverted U-shaped relationship between regulatory variables and industrial growth, and for about 67% of the sample observations, the level of growth regulation has increased and its effect on industrial growth is positive and significant. . Also, in this example, the growth maximization level for regulation was 2.61 (on a scale of 0-10). Another important result is that the nature of the relationship between regulation and industrial growth in developed countries is fundamentally different from developing countries. In particular, while the model estimate for developing countries is consistent with the findings related to the total observations and is in the form of an inverted U relationship, the findings related to developed countries are completely different and the maximizing level of industrial growth for these countries It was not observed that the reason is related to institutional differences in these two spectrums.
Research Paper
Shima Namazi Zavareh; Farshad Momeni; Ali Asghar Salem
Abstract
In order to face the challenge of youth poverty, the main focus should be on facilitating the access of the NEET population to quality education and decent job opportunities. Considering that this group of people is a potential threat to the country's achievement of one of the most important goals of ...
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In order to face the challenge of youth poverty, the main focus should be on facilitating the access of the NEET population to quality education and decent job opportunities. Considering that this group of people is a potential threat to the country's achievement of one of the most important goals of sustainable development, i.e. ending poverty through decent work and economic growth, and they turn the young population into a challenge and not an opportunity in the economy, Examining the impact they have on poverty and the impact they receive from poverty is very important. In this regard, the aim of this article is to investigate the simultaneous relationship between household poverty and population phenomenon in the urban and rural society of Iran in 1401. For this purpose, using the detailed data of urban and rural households' expenditure and income plan, the poverty line was first calculated based on the multidimensional poverty approach and poor households were identified. Then, the households that have demographic phenomena were also identified. The results of the estimation of the research model using the two-stage least squares method (2SLS) showed that in urban areas, population phenomenon and poverty both have a positive and significant effect on each other. Unlike in urban areas, the results of the estimation of the research model in rural areas indicated that the population phenomenon does not have a significant effect on household poverty, but on the other hand, household poverty has a positive and significant effect on it.
Research Paper
Shima Namazi Zavareh; Farshad Momeni; Ali Asghar Salem
Abstract
A major reason for pushing people towards informal jobs is the motivation of necessity. In fact, informal employment is a kind of survival strategy for those who have no other way to earn money and support themselves and their families except by working in these types of low-paid jobs. At the level of ...
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A major reason for pushing people towards informal jobs is the motivation of necessity. In fact, informal employment is a kind of survival strategy for those who have no other way to earn money and support themselves and their families except by working in these types of low-paid jobs. At the level of development, the continuation of this trend affects the economic competitiveness and the quality of life of the citizens, and the foundation of national production and technological and innovative production faces serious limitations. the purpose of this article is to investigate the effect of household poverty along with other socio-economic factors on informal employment in urban areas of Iran in 2019. For this purpose, by using the detailed data of the expenditure and income plan of urban households, first, the poverty line was calculated based on the absolute poverty approach for urban areas and poor households were identified. Then according to the index presented in this research, the type of employment of households was determined in terms of formal and informal. The results of estimating the research model using the two-stage Heckman Probit method indicate that household poverty leads to a significant increase in informal employment, so that with an increase in poverty, the probability of being informally employed increases by 0.57. The strategic message of this study is that the problem of poverty and informal employment in Iran can be overcome only by upgrading the technological production base and creating value-creating capabilities based on increasing productivity.
Research Paper
Mohammad Feghhi Kashani; Teymor Mohammadi; zahra Aghighi
Abstract
One of the key challenges in empirical studies relates to the identification of the dynamics of bubbles that periodically run up and collapse. This study is an attempt in this field, which initially examines some limitations of one of the relatively new methods in the economic literature as to the identification ...
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One of the key challenges in empirical studies relates to the identification of the dynamics of bubbles that periodically run up and collapse. This study is an attempt in this field, which initially examines some limitations of one of the relatively new methods in the economic literature as to the identification of rational bubbles in the Tehran Stock Exchange for the period of 2009-2020. Then, by assuming the Markov switching regime approach in this area, we have extended the conventional method by taking into account the dynamic interaction of asset prices in the market with the latent factor in the process of bubbles expansion and collapse. It is shown how this framework, while improving the efficiency of detecting financial bubbles through mitigating the specification error of dynamic models compared to existing alternative methods, is capable of incorporating the feature of traders' interactions in the market with no specific assumptions on how they interact, especially with regard to the coordination of their expectations and pursuant trading behavior. The findings resulting from this method indicate the existence of a bubble in asset prices only for the period 2018-2020, as opposed to the use of the conventional method, which implies either no bubble or the existence of two bubbly periods 2012-2014 and 2018-2020. in the Tehran Stock Exchange.
Research Paper
Mohammad Reza Salehi Rad; Manijeh Mahmoodi
Abstract
The modeling is a very important topic in economic and financial research and it has a basic role in the analyzes, decisions, the policies and planning. In the modeling, assumptions have an important role in estimation and forecasting, because they can affect the results of models and analyses. The one ...
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The modeling is a very important topic in economic and financial research and it has a basic role in the analyzes, decisions, the policies and planning. In the modeling, assumptions have an important role in estimation and forecasting, because they can affect the results of models and analyses. The one of the most widely used classical time series models is the autoregressive model, where the current values are the finite linear combination of its past values. On the other hand, in real problems, many variables affect each other. For this reason, the vector time series models are used, which are part of the multivariate time series. The Vector autoregressive models are used in economic and financial modeling. The vector autoregressive (VAR) models are usually considered with the normal distribution for the shocks (noises). Since, in economic and financial issues, especially macroeconomics, the shocks don’t have symmetric distribution. In this paper, the VAR model with the Multivariate Skew Normal (MSN) distribution for the shocks is considered and since, the estimation of the parameters is an important step in modeling, the parameters of the model are estimated by using the Expectation Conditional Maximization (ECM) algorithm. Finally, by using the real data sets of Canada and Iran where the shocks have skewness and the evaluation criteria of the models, it is shown that the VAR model with MSN distribution for shocks in these data is more efficient than the VAR model with the multivariate normal distribution for shocks.
Research Paper
zahra bigdeli shamloo; Abbas Shakeri; Teymur Mohamadi; Syrous Omidvar
Abstract
The main purpose of this study is to analyze the nature of the money creation process by examining the approaches related to this process in Iran. The two main views regarding the money creation process are the endogenous and exogenous money approaches. The endogeneity of money means that the money supply ...
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The main purpose of this study is to analyze the nature of the money creation process by examining the approaches related to this process in Iran. The two main views regarding the money creation process are the endogenous and exogenous money approaches. The endogeneity of money means that the money supply is directly influenced by the economic activities and conditions in the economy, and it is not determined by central bank exclusively. The endogeneity of money can also be a very important factor in the efficiency and effectiveness of monetary policies on macroeconomic indicators. Therefore, in order to test the endogeneity based on post-Keynesian approaches, the two-stage method of the state-space approach was applied to determine a time-variable model of money supply using the annual data from 1357 to 1400 in Iran. The results indicate: firstly, money is endogenous. Secondly,the effect of explanatory variables on it is not constant over time, and therefore, it is necessary to change monetary policies from targeting on money aggregates according to the conditions of endogenous money.
Research Paper
Ahmadreza Ahmadi; Mohammad Boushehri
Abstract
The expansion and deepening of the financial sector as one of the most important sectors of the economy of any country can affect tax evasion. In the present study, first, the relative size of tax evasion was calculated using the MIMIC method, which indicates an average of 8.1% in Iran's economy. ...
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The expansion and deepening of the financial sector as one of the most important sectors of the economy of any country can affect tax evasion. In the present study, first, the relative size of tax evasion was calculated using the MIMIC method, which indicates an average of 8.1% in Iran's economy. Then, using the ARDL approach, the effect of the deepening of institutions and financial markets on tax evasion was investigated and tested separately using the indicators published by the International Monetary Fund (IMF) in the period from 1980 to 2022. The results of long-run estimates show that both the deepening of financial institutions and the deepening of financial markets have a negative effect on tax evasion. Second, in terms of size (absolute value), the inverse effect of the deepening of financial institutions on tax evasion is more than the deepening of financial markets. Among the control variables of the model, the tax burden has an inverted U shape and oil rent has a positive effect on tax evasion. Another finding is that in the period after the JCPOA (2017-2022) the amount of tax evasion has significantly decreased.