Journal of Economic Modeling Research

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Macroeconomic performance has improved in many countries in the world in the last fifteen years or so. Much of the literature has concentrated on how central bank independence, inflation targeting regimes, and currency :::union:::s have contributed to improving the effectiveness of monetary policy and hence macroeconomic performance. Since the financial system is a key component of the monetary transmission mechanism, we study how a country’s financial development affects monetary policy efficiency in 28 developed and developing countries within 1995-2006. Specifically, our objective is to derive monetary policy efficiency measures (PEMs) - derivative from Krause and Rioja- for 28 Developed and developing countries and analyze the impact that the size and depth of the banking sector and the capital sector have on policy performance. In our empirical analysis we use three financial development measures: private credit, liquid liabilities, and a financial aggregate index that comprises banking and stock market measures. The Results of model estimation with generalized method of moments (GMM) technique, shows that financial development with mentioned indicators has a positive and significant effect on monetary policy efficiency. Also supervision in central bank independency and inflation targeting regimes -as control variables- has positive and significant effect on monetary policy efficiency. This result doesn’t make a difference whether the country is developed or developing and in the both of them more developed financial markets, controlling the central bank independency and applying inflation targeting regimes, significantly help to achieve a more efficient monetary policy.

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  The ultimate goals of the monetary policy are price stability and the output growth. Monetary policy instruments are interest rate and the growth rate of monetary base. One of the well-known rules in conducting monetary policy is Taylor rule, through which, central banks change the interest rate while taking into account the output and inflation distortions. There are two problems with applying Taylor rule in Iran: First, the weak micro-foundation of the rule and second, according to this rule specially in the short run, instead of interest rate the policy variable is the growth rate of the monetary base. This research extends Taylor rule by explaining micro-foundation of the rule. So, using Generalized Method of Moments (GMM), we investigated the consistency of the Iranian central bank’s reaction function with extended Taylor rule in the period 1979- 2008. The empirical results show that although monetary authorities react appropriately with respect to output distortion, but their reaction is not appropriate with respect to inflation distortion.

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Since the liquidity shortage has some undesirable consequences for banks, the evaluation of different strategies of providing liquidity is very important. In normal market conditions, there are plenty of adjustment strategies available for banks which allow them to have higher liquid assets when they face higher payment obligations. This paper mainly focuses on three strategies of liquidity management in country's banking system in above conditions. The main aim of current paper is to test three strategies of liquidity management based on the recommendations of Basel Committee in the condition of increasing the payment obligations of the banking network, by applying Generalized Method of Moments (GMM) method. We used the data from 20 Iranian commercial banks for the period 2001-2009. Results show that there is a positive relationship between payment obligations and securities stock growth rates and also between payment obligations and repayments of loans growth rates. However there is a diverse relation between payment obligations and long-term loans growth rates.

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In the current structure of world economy, imports play an important role in the economic development strategy. Although taking the suitable policies for the imports of goods and services is important, but taking the correct strategy is subject to factors affecting imports. In the most of empirical studies, imports are a function of real income and real exchange rate. So, the effect of income inequality on imports of goods and services has less been investigated. Whereas, increase in income inequality causes an increase in the purchasing power of high income people and demand for imported luxury goods and also causes a change in the composition of domestic and imported consuming goods. This study examine the effect of income inequality on import of goods and services in 17 developed countries and 18 developing countries in the period 1990-2010 using generalized method of moment (GMM) analysis. The results indicate that there is a positive relationship between income inequality and imports of goods and services in developed countries while this relation is negative in developing countries. Furthermore, the relationship between GDP and imports of goods and services is positive in both groups of countries, while the relationship between real exchange rate and imports of goods and services is negative in both groups. Thus, policy makers should redistribute income and wealth in favor of the low income people and motivate them to participate in the production sectors, reduce the inequality gap and improve their competitiveness power in the market and enhance the income from the abroad.

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Natural resources as wealth in general and oil and natural gas in particular can have a potentially beneficial impact on the economic prosperity. However, economic experience implies that many of the major oil exporting countries are facing instability in economic growth, Dutch Disease, corruption and under- development. Owing to the fact that natural resources can play a vital role in development, the present study tries to investigate the econometrics relationship between export of natural resources (as a proxy for abundance) and governance indicators (as alternative variables for institutional development) in selected oil-exporting and OECD countries through the application of Generalized Moment of Method (GMM), for the period lasting from 1996 to 2011. Findings of the study revealed that the strong and statistically significant evidence confirms the negative impact of the export of natural resources on the governance index, quality of regulations, rule of law and control of corruption in the selected OPEC’s member countries. Nevertheless, such a negative impact does not have any statistically significant strength in developed countries. This is due to the improvement made in the surveillance, technical and executive mechanisms of the institutions in the selected OECD countries. It seems that the enormous incomes accrued from the export of natural resources in the oil producing countries in question will induce a decrease in transparency and accountability, instability and frequent changes in economic policies, extension of rent-seeking, corruption and authoritarianism.

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Financial institution as a non-bank financial institutions, institutions that are active in mediating funds in financial markets. Services are in many ways similar to the services provided by banks. Because the relationship between the development of non-bank financial institutions and Iranian gross domestic production (GDP) seem important. In this context, the main objective of this study was to investigate the effect of non-bank financial institutions in the areas of facilities of GDP contracts with other variables such as per capita GDP and employment effects on the labor force for the period 1999Q1-2013Q4. To estimate the Generalized Method of Moments (GMM) is used to model estimation results indicate a significant positive impact on the development of non-bank financial institutions and facilities with regard to Islamic contracts. The per capita income and employment variables have a significant positive impact on GDP respectively.

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Environmental quality is affected by many factors such as economic and political inequality. The main purpose of this article is to investigate the effects of income and political inequality on the environment quality in the selected countries. Using the Generalized Method of Moments (GMM), the effects of gini coefficient, democracy index and income per capita, energy consumption and human development index on environmental quality are estimated for 57 countries during the period 2000 to 2012. The results show that income inequality and Political inequality significantly had a negative effect on environment quality. While the energy consumption has the negative effect on the quality of environment, improvement in human development index and the income per capita have a positive effect on the quality of environment. This finding might has important policy implication for policymakers and authorities to achieve sustainable development in different countries.

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Construction projects are the basic requirements of sustainable development and growth. Inefficient procedures of implementing the construction projects, regardless of our financial and administrative capacities, has imposed a large amount of unfinished and occasionally stopped projects to national economy. Since there are various components that affect the fate of projects, therefore, the main purpose of this paper is to answer this question that whether the political cycles affect the adoption and implementation of provincial construction projects or not? In order to answer this question, two hypotheses are considered in this paper. Therefore, GMM dynamic method was used to estimate the model and test hypothesis in the years 1997-2014. Hypothesis one: political cycles affect the fate of construction projects, and the second hypothesis: the impact of political cycles on the adoption and implementation of construction projects are larger in the year prior to political cycle (election). Therefore, in order to estimate the model and test the research hypothesis, provincial data during the years was used. Results of testing two hypotheses suggest that parliamentary and presidential political cycles have a significant positive correlation with the construction projects. Results also show that the presidential political cycle has a larger impact on construction projects, meaning that the impact of political cycles on the process of adopting and implementing the construction projects in the year prior to the political cycle is larger. In this regard, in order to eliminate the impacts of the governmental and parliamentary political cycle on construction projects, it is recommended to determine a competent authority that has the necessary qualifications as well as the sufficient degree of independence and supervision power over the project's Feasibility studies. The referenced mentioned will be approve projects based on objective justification-technical and district-based studies and it prevents the adoption of development plans based on the political considerations of the government and parliamentarians.

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The main objective of this paper is to investigate the impact of corruption on the military burden of developing countries during the 2000-2015 period. To achieve this goal, a general model of military expenditures , two indexes of corruption including corruption perceptions and control of corruption, Panel Co-integration analysis and two-stage system generalized method of moment estimator (SGMM), has been used. The results of the estimation of the research model show that the effect of corruption on the military burden of the studied countries is positive and significant. According to other results, civilian spending (as an opportunity cost of military spending) and democracy have had a negative and significant impact on the military burden of developing countries. . Population as a social variable has a positive and significant effect on the military burden of developing countries, which indicates that defense is a public good. Per capita income and lagged military expenditure also have a positive and significant effect on the military burden of the studied countries. The average military burden of the countries of the world has also had a positive and significant impact on the military burden of developing countries, which indicates a rivalry of arms.

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Rental housing has been affected by housing prices in different periods and the growth of housing prices has reduced the purchasing power of housing applicants and increased the percentage of rented households. Therefore, any recession and boom in the housing sector has a direct impact on the housing rental market, and planning to control the rental market will not be achieved without considering the housing market. In this regard, the purpose of this study is to investigate the factors affecting housing rent based on two groups included large, small and medium cities in Iran using the Generalized moment method (GMM) in the period (2008-2018). The results show that housing rental prices in the previous period, housing prices, land leverage and real per capita income of urban households had the most positive impact on housing rents in both large and small and medium cities. Also, the impact of housing prices and rental prices in the previous period has been greater in large cities. Also, Housing bank facilities, the number of urban marriages and the real interest rate were other variables affecting the rental price of housing in urban areas.

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