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Investigating the Effect of Structural Changes and Trade Liberalization on Total Factor Productivity in Iran (1991-2018) 伊朗结构变动与贸易自由化对全要素生产率的影响研究(1991-2018)
Pub Date : 2021-03-01 DOI: 10.52547/jme.16.1.71
Yasaman Hokmollahi, Ali Taiebnia, A. Souri
Structural change plays an important role in developing any economy, so understanding it is critical to make policies that increase total factor productivity. The structural change that leads to an efficient resource allocation after trade reforms is desirable; the key factor that can affect the relation of "structural change and trade liberalization" with productivity is the quality of institutions. In this study, we first use the principal component method to propose a multidimensional index for structural change and then apply the ARDL econometrics model to evaluate the effect of trade liberalization and structural changes on total factor productivity in Iran during 19912018. The results show that structural changes increase the total factor productivity, and trade liberalization has a positive and significant effect on total factor productivity in the short term. Our results also indicate that there is no long-run relationship in this period.
结构变化在任何经济体的发展中都发挥着重要作用,因此,了解结构变化对于制定提高全要素生产率的政策至关重要。在贸易改革之后,导致有效资源配置的结构性变化是可取的;影响“结构变迁与贸易自由化”与生产率关系的关键因素是制度质量。本研究首先利用主成分法提出了结构变化的多维指标,然后运用ARDL计量经济学模型评估了1991 - 2018年贸易自由化和结构变化对伊朗全要素生产率的影响。研究结果表明,结构变化提高了全要素生产率,贸易自由化在短期内对全要素生产率有显著的正向影响。我们的研究结果也表明,在这一时期不存在长期关系。
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引用次数: 0
A Stepwise Model of Customer Experience Management for Iranian ICT Sector 伊朗ICT行业客户体验管理的逐步模型
Pub Date : 2021-03-01 DOI: 10.52547/jme.16.1.115
Fatemeh Saeedi, A. Danaei, S. M. Zargar
Knowing and managing the concept of customer experience is the main factor in creating competitiveness for any organization. Moreover, without customer experience management, a business cannot specify appropriate strategies to maintain the current market and business sustainability. However, most of the existing studies have looked at this subject abstractly and have not provided a comprehensive model based on steps taken in the customer journey. This research aims to fill the gap by providing the body of knowledge with a comprehensive model for customer experience management, where the stepwise nature of the concept is maintained. Using a grounded theory (GT) strategy, 20 experts in the Iranian IT sector took part in this study. Data gathered using an interview protocol that was made based on reviewing the existing literature. Both reliability (Inter-coder rating) and validity (face and content validity) measures for the data gathering tool were obtained. Three coding approaches of grounded theory (open, axial, and selective coding) were applied to analyze the data. This study introduced a stepwise model of customer management experience through the customer journey steps. The model also contains the prerequisites conditions to realize the customer experience in the IT sector and reveals the contextual factors affecting the process and finally the consequences of applying the model.
了解和管理客户体验的概念是任何组织创造竞争力的主要因素。此外,如果没有客户体验管理,企业就不能指定适当的策略来维持当前市场和业务的可持续性。然而,大多数现有的研究都是抽象地看待这个问题,并没有提供一个基于客户旅程中所采取步骤的综合模型。本研究旨在通过为客户体验管理提供一个全面的模型来填补这一空白,在这个模型中,这个概念的阶梯式本质是保持不变的。使用扎根理论(GT)策略,伊朗IT部门的20名专家参与了这项研究。数据收集使用的访谈协议是基于审查现有的文献。获得了数据收集工具的信度(编码间评分)和效度(面部和内容效度)测量。三种编码方法的接地理论(开放,轴向和选择性编码)应用于分析数据。本研究透过顾客旅程的步骤,引入顾客管理经验的阶跃模型。该模型还包含实现IT部门客户体验的先决条件,并揭示了影响应用该模型的过程和最终结果的上下文因素。
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引用次数: 1
Dynamic Cross Hedging Effectiveness between Gold and Stock Market Based on Downside Risk Measures: Evidence from Iran Emerging Capital Market 基于下行风险度量的黄金和股票市场动态交叉对冲有效性:来自伊朗新兴资本市场的证据
Pub Date : 2021-03-01 DOI: 10.52547/jme.16.1.43
R. Tehrani, Vahid Veisizadeh
This paper examines the hedging effectiveness of gold futures for the stock market in minimizing variance and downside risks, including value at risk and expected shortfall using data from the Iran emerging capital market during four different sub-periods from December 2008 to August 2018. We employ dynamic conditional correlation models including VARMA-BGARCH (DCC, ADCC, BEKK, and ABEKK) and copulaGARCH with different copula functions to estimate volatilities and conditional correlations between Iran gold futures contract return and Tehran stock exchange main index return. The empirical results reveal that the dynamic conditional correlations switch between positive and near-zero values over the period under study. These correlations are high and positive during the major national currency devaluation and are low near to zero during other times. Out-of-sample one-step-ahead forecasts based on rolling window analysis show that DCC and ADCC multivariate GARCH models outperform other models for variance reduction, while a more interesting finding is that the copula-GARCH model outperforms other models for downside risks reduction.
本文利用2008年12月至2018年8月伊朗新兴资本市场四个不同时期的数据,检验了黄金期货对股票市场在最小化方差和下行风险(包括风险价值和预期缺口)方面的对冲效果。本文采用VARMA-BGARCH (DCC、ADCC、BEKK和ABEKK)和copulaGARCH等具有不同联结函数的动态条件相关模型,估计了伊朗黄金期货合约收益率与德黑兰证交所主要指数收益率之间的波动率和条件相关性。实证结果表明,在研究期间,动态条件相关性在正值和近零值之间切换。在主要国家货币贬值期间,这些相关性很高且为正,而在其他时间则低至接近于零。基于滚动窗口分析的样本外一步超前预测表明,DCC和ADCC多元GARCH模型在减少方差方面优于其他模型,而更有趣的发现是,copula-GARCH模型在减少下行风险方面优于其他模型。
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引用次数: 0
Identifying the Suspected Cases of Money Laundering in Banking Using Multiple Attribute Decision Making (MADM) 利用多属性决策识别银行业洗钱嫌疑案件
Pub Date : 2021-03-01 DOI: 10.52547/jme.16.1.1
Azam Parsaee Tabar, N. Abdolvand, S. Rajaee Harandi
Money laundering is among the most common financial crimes that negatively affect countries' economies and hurt their social and political relations. With the increasing growth of e-banking and the increase in electronic financial transactions, the identification of money laundering methods and behaviors has become more complex; because money launderers, by accessing the Internet and using new technologies, find new ways to legalize their illegal income. Although many efforts have been made to identify suspected cases of money laundering and fight against this financial crime, little success has been achieved in this regard, especially in developing countries. Hence, this study tries to identify the risk factors involved in money laundering in banking transactions. To this end, multiple attribute decision-making methods, such as the Shannon entropy method, hierarchical analysis, and two-level fuzzy hierarchical analysis, have been used to assess and score the risk of various transactions in money laundering. The results indicated that the highest risk of money laundering was in the POS transactions.
洗钱是最常见的金融犯罪之一,对国家经济产生负面影响,并损害其社会和政治关系。随着电子银行业务的不断发展和电子金融交易的增多,洗钱手段和洗钱行为的识别变得更加复杂;因为洗钱者通过接入互联网和使用新技术,找到了使其非法收入合法化的新方法。虽然为查明涉嫌洗钱案件和打击这一金融犯罪作出了许多努力,但在这方面取得的成功很少,特别是在发展中国家。因此,本研究试图找出银行交易中涉及洗钱的风险因素。为此,利用香农熵法、层次分析法、两级模糊层次分析法等多属性决策方法对洗钱中各类交易的风险进行评估和评分。结果显示,洗钱风险最高的是POS交易。
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引用次数: 0
Stress Testing of Credit Risk in Iran’s Banking System 伊朗银行体系信用风险压力测试
Pub Date : 2021-03-01 DOI: 10.52547/jme.16.1.93
Mahboobeh Sanatkhani, F. Bazzazan
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引用次数: 0
Investigation of Factors Affecting Banking Leverage in Selected Iranian Banks (Random-Coefficients Approach) 伊朗部分银行杠杆影响因素调查(随机系数法)
Pub Date : 2021-03-01 DOI: 10.52547/jme.16.1.21
Alireza Ahadifar, Zahra Karimi Takanlo, Reza Ranjpour, J. Haghighat
This study investigates the effect of intra-organizational and macroeconomic factors on banking leverage in selected Iranian banks. For this purpose, after calculation of the Banking Leverage for each bank, by using Random-Coefficients Approach (Swamy model), the impact of explanatory variables during the period of 1999-2016 was examined separately by 10 selected Iranian public and private banks. Based on calculations, Melli, Saderat, Refah, and Tejarat Bank had the highest and Sanat-vaMadan, Eghtesad-Novin, and Sepah had the lowest level of banking leverage. Furthermore; the results of estimations show that "organizational" and "structuralvariables" of each bank have different effects on their banking leverage. For example, "credit risk" has a positive and significant effect on bank leverage in "Tejarat", "Saderat", "Refah" and "Sanat-va-Madan" banks. The effect of "liquidity risk" is the same as "credit risk". In general, due to banks' dissimilar structures, organizational and structural variables hold a varying impact on their banking leverage.
本研究考察了组织内因素和宏观经济因素对选定的伊朗银行的银行杠杆率的影响。为此,在计算每家银行的银行杠杆后,通过使用随机系数方法(Swamy模型),由10家选定的伊朗公共和私人银行分别检查了1999-2016年期间解释变量的影响。根据计算,Melli、Saderat、Refah和Tejarat银行的银行杠杆率最高,Sanat-vaMadan、Eghtesad-Novin和Sepah银行的银行杠杆率最低。此外;估计结果表明,各银行的“组织变量”和“结构变量”对其银行杠杆率的影响是不同的。例如,“Tejarat”、“Saderat”、“Refah”和“Sanat-va-Madan”银行的“信用风险”对银行杠杆率有显著的正向影响。“流动性风险”的影响与“信用风险”相同。一般来说,由于银行的结构不同,组织变量和结构变量对银行杠杆的影响是不同的。
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引用次数: 0
Proposing an Innovative Model Based on the Sierpinski Triangle for Forecasting EUR/USD Direction Changes 提出一个基于谢尔宾斯基三角的预测欧元/美元方向变化的创新模型
Pub Date : 2020-10-01 DOI: 10.52547/jme.15.4.423
Fatemeh Rahimi, Seyed Alireza Mousavian Anaraki
The Sierpinski triangle is a fractal that is commonly used due to some of its characteristics and features. The Forex financial market is among the places wherein this triangle's characteristics are effective in forecasting the prices and their direction changes for the selection of the proper trading strategy and risk reduction. This study presents a novel approach to the Sierpinski triangle and introduces an innovative model based on it to forecast the direction changes in currency pairs, particularly EUR/USD. The model proposed in this study is dependent on the number of data selected for forecasting. The number of data is, in fact, the area of the initial triangle and the forecasted value of the self-similar triangles formed in each stage. For the performance assessment of the proposed method within one year (03/01/2019 to 28/02/2020), daily EUR/USD closed price data was classified into three categories, namely the training (70%), testing (20%), and validation (10%). Three approaches were proposed that led to forecasting the mean direction accuracy and the best result of over 60 percent in the third approach and over 50 percent in the first and second approaches. Results reflect the satisfactory improvements in the third approach compared to the econometrics, time-series, and machine learning methods. Moreover, the optimal number of data for the model is selected such that the difference between the accuracy of the direction forecasting in the training category and testing category is above 0.6 and below 0.05.
Sierpinski三角形是一种常用的分形,由于它的一些特性和特征。在外汇金融市场中,这个三角形的特征可以有效地预测价格及其方向的变化,从而选择适当的交易策略和降低风险。本研究提出了一种新的谢尔宾斯基三角的方法,并在此基础上引入了一个创新的模型来预测货币对的方向变化,特别是欧元/美元。本研究提出的模型依赖于所选预测数据的数量。数据的数量实际上是初始三角形的面积和每个阶段形成的自相似三角形的预测值。对于一年内(2019年3月1日至2020年2月28日)提出的方法的性能评估,将每日欧元/美元收盘价数据分为三类,即训练(70%),测试(20%)和验证(10%)。提出了三种预测平均方向精度的方法,其中第三种方法的预测结果在60%以上,第一种和第二种方法的预测结果在50%以上。结果表明,与计量经济学、时间序列和机器学习方法相比,第三种方法有了令人满意的改进。选择模型的最优数据数,使训练类和测试类的方向预测准确率之差在0.6以上,在0.05以下。
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引用次数: 0
Accruals Quality and Bankruptcy in Shirata Model (Case Study: Tehran Stock Exchange) Shirata模型中的应计质量与破产(以德黑兰证券交易所为例)
Pub Date : 2020-10-01 DOI: 10.52547/jme.15.4.381
Oveis Bagheri, Mona Ranjbaran Jalili
In this research, the relationship between accruals quality and bankruptcy of companies has been studied. According to Dechow et al.'s (1995) model, the quality of accruals was measured, and according to the Shirata model (1998), bankruptcy was examined. Operations were considered as the control variables. The research hypothesis was tested using a multivariate regression model and a combined data method. The study's statistical sample consists of 197 companies listed on the Tehran Stock Exchange from 2011 to 2019. The results showed a significant and negative relationship between the quality of accruals and bankruptcy of the companies. It means that in bankruptcy, the use of earnings management through optional accruals reduces the quality of accruals. The results indicate that size, return on assets, and audit quality all significantly impact the quality of accruals. Besides, the leverage, life, and operating cash flow have a significant and negative effect on accruals' quality. However, the ratio of market value to book value does not significantly affect the quality of accruals.
本研究主要研究应计质量与公司破产之间的关系。根据Dechow et al.(1995)的模型,衡量应计项目的质量,根据Shirata模型(1998),检查破产。操作被认为是控制变量。采用多元回归模型和组合数据法对研究假设进行检验。该研究的统计样本包括2011年至2019年在德黑兰证券交易所上市的197家公司。结果显示,应计项目质量与企业破产呈显著负相关。这意味着在破产中,通过可选应计项目进行盈余管理降低了应计项目的质量。结果表明,规模、资产收益率和审计质量都显著影响应计项目的质量。此外,杠杆、寿命和经营性现金流对应计项目质量有显著的负向影响。然而,市场价值与账面价值的比率并不显著影响应计项目的质量。
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引用次数: 0
Insurer Optimal Asset Allocation in a Small and Closed Economy: The Case of Iran’s Social Security Organization 小型封闭经济中保险公司最优资产配置:以伊朗社会保障组织为例
Pub Date : 2020-10-01 DOI: 10.52547/jme.15.4.445
Elaheh Esfandi, M. Mousavi, Rassam Moshrefi, Babak Farhang-Moghaddam
We seek to determine the optimal amount of the insurer’s investment in all types of assets for a small and closed economy. The goal is to detect the implications and contributions the risk seeker and risk aversion insurer commonly make and the effectiveness in the investment decision. Also, finding the optimum portfolio for each is the main goal of the present study. To this end, we adopted the optimal asset-liability management (ALM) method to control the firm's risk of financial stability and growth by balancing the assets and liabilities of the firm. In the process, stochastic interest rates and inflation risks were taken into account according to the expected utility maximization framework. All assets were established and calculated by the Kalman Filter with the stochastic interest rate following the Hull-White model; an additional stochastic process models the inflation risk. To consider the stochastic process, we employed the geometric Brownian motion in the liability process to ensure a definite liability value. We chose Iran’s Social Security Organization as our sample insurer company since it has a portfolio of five types of assets and four types of liabilities, and operates in a small and closed economy. By Applying the ALM method with the stochastic control theory approach, we acquire the optimal investment strategies for insurers to minimize their risk. Our findings demonstrate the effects of model parameters, such as the degree of risk-taking on the insurer decision.
我们试图确定保险公司在所有类型资产投资的最佳金额为一个小而封闭的经济。目的是检测风险寻求者和风险厌恶者在投资决策中的影响和贡献,以及投资决策的有效性。同时,为每一种投资组合寻找最优投资组合是本研究的主要目标。为此,我们采用最优资产负债管理(ALM)方法,通过平衡企业的资产负债来控制企业的财务稳定和成长风险。在此过程中,根据期望效用最大化框架考虑了随机利率和通货膨胀风险。根据Hull-White模型,用随机利率卡尔曼滤波建立并计算所有资产;另一个随机过程模拟通货膨胀风险。为了考虑随机过程,我们在负债过程中采用几何布朗运动来保证负债值的确定。我们选择伊朗的社会保障组织作为样本保险公司,因为它有五种类型的资产和四种类型的负债,并且在一个小而封闭的经济体中运营。通过运用随机控制理论的方法,我们得到了保险公司风险最小化的最优投资策略。我们的研究结果证明了模型参数的影响,如风险承担程度对保险公司的决策。
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引用次数: 1
Macroeconomic Effects of Government Debt to Banks in Iran 伊朗政府债务对银行的宏观经济影响
Pub Date : 2020-10-01 DOI: 10.52547/jme.15.4.403
Soheil Roudari, Y. Salmani
In the Iranian economy, part of the government's fiscal policies and liabilities is always financed by banks. As government debt to banks increases, the private sector's access to loans and facilities is limited. It can cause undesirable macroeconomic outcomes. This study investigates the macroeconomic effects of government debt on banks in Iran over 1972–2016 by using an SVAR model. Results show that government debt to banks does not significantly affect the aggregate demand ratio to aggregate supply and GDP per labor. Still, it significantly increases the real exchange rate and decreases the nontradable goods' ratio to tradable goods prices. In the long-run, the real exchange rate, the ratio of non-tradable goods to tradable goods price, and the general price level changed by 34.46, 20.95, and 46.4 percent, respectively, which can be explained by the government debt to banks. Results indicate that the government policy manages the Iranian economy.
在伊朗经济中,政府的部分财政政策和债务总是由银行提供资金。随着政府对银行的债务增加,私营部门获得贷款和融资的渠道受到限制。它可能导致不受欢迎的宏观经济结果。本研究使用SVAR模型研究了1972-2016年伊朗政府债务对银行的宏观经济影响。结果表明,政府对银行的债务对总需求/总供给比和人均GDP没有显著影响。尽管如此,它还是显著提高了实际汇率,降低了非贸易商品与贸易商品价格的比率。长期来看,实际汇率、非贸易商品与贸易商品价格之比、物价总水平分别变化了34.46%、20.95%和46.4%,这可以用政府对银行的债务来解释。结果表明,政府政策管理伊朗经济。
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引用次数: 0
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Journal of Money and Economy
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