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Is there an Interdependence in Foreign Exchange Markets During Non-Crisis Periods? Empirical Evidence from Mena Countries 非危机时期外汇市场是否存在相互依赖关系?来自中东和北非国家的经验证据
Q4 Economics, Econometrics and Finance Pub Date : 2020-08-01 DOI: 10.1080/10800379.2020.12097363
H. Bouhali, M. Chiadmi, F. Ghaiti
The purpose of this article is to investigate the existence of volatility interdependence in different fixed-exchange-rates markets during non-crisis periods. Based on daily exchange rates from four Middle East and North African (MENA) countries (Saudi Arabia, Kuwait, Morocco, and Tunisia), we use an original approach, combining proper segmentation of our data sample with univariate and multivariate GARCH models. The main result is that fixed exchange rates do show different levels of volatility interdependence to the international market in both stable and crisis periods. Moreover, the type of exchange rate regime plays a significant role in maintaining the interdependence, while introducing flexibility reforms tend to reduce it and to increase the impacts of past shocks.
本文的目的是研究非危机时期不同固定汇率市场波动相互依赖的存在性。基于四个中东和北非(MENA)国家(沙特阿拉伯、科威特、摩洛哥和突尼斯)的每日汇率,我们使用了一种原始方法,将数据样本的适当分割与单变量和多变量GARCH模型相结合。主要结果是,固定汇率在稳定时期和危机时期确实表现出与国际市场相互依赖的不同程度的波动性。此外,汇率制度的类型在维持相互依赖方面发挥着重要作用,而引入灵活性改革往往会减少这种相互依赖,并增加过去冲击的影响。
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引用次数: 1
Exploring the Behaviour of Actively Managed, Maximally Diversified Portfolios 探索积极管理、最大限度多样化投资组合的行为
Q4 Economics, Econometrics and Finance Pub Date : 2020-08-01 DOI: 10.1080/10800379.2020.12097362
L. Theron, G. V. Van Vuuren
Maximising returns is often the goal of asset management, but in the current (2020) low-interest investment environment, plagued by political, trade and economic uncertainty, managing portfolio risk also plays a significant role. Maximally diversified (MD) portfolios are assembled with an emphasis on risk management, not return outperformance. This approach can yield considerable benefits for risk- averse investors. While some work has been done applying this technique to passive portfolios, little to none has been undertaken on active portfolios, restricted by tracking errors (TEs) and evaluated relative to a benchmark. For the first time, actively managed maximum diversification portfolios are scrutinised over time. In booming markets, actively managed MD portfolios generate significant outperformance, but during recessionary periods, no significant benefits emerge. Returns and Sharpe ratios are weak and volatilities high (albeit lower than other strategies). As TE increases, actively managed MD portfolio weights become less confined and adjust ever closer to the overall (unconstrained) MD portfolio weights. Fewer benefits are realised as TEs increase for actively managed MD portfolios compared with the unconstrained alternative.
最大化回报通常是资产管理的目标,但在当前(2020年)受政治、贸易和经济不确定性困扰的低息投资环境中,管理投资组合风险也发挥着重要作用。最大多元化(MD)投资组合的重点是风险管理,而不是回报跑赢大盘。这种方法可以为规避风险的投资者带来可观的收益。虽然已经将这项技术应用于被动投资组合进行了一些工作,但受跟踪误差(TE)的限制并相对于基准进行评估的主动投资组合几乎没有。随着时间的推移,首次对积极管理的最大多元化投资组合进行了仔细审查。在繁荣的市场中,积极管理的MD投资组合产生了显著的跑赢大盘,但在经济衰退时期,没有出现显著的收益。回报率和夏普比率较弱,波动性较高(尽管低于其他策略)。随着TE的增加,积极管理的MD投资组合权重变得不那么受限,并且调整得越来越接近总体(无约束)MD投资组合的权重。与不受约束的替代方案相比,随着积极管理的MD投资组合的TE增加,实现的收益更少。
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引用次数: 1
Trade Openness, Institutions and Financial Development in Sub-Saharan Africa 撒哈拉以南非洲的贸易开放、制度和金融发展
Q4 Economics, Econometrics and Finance Pub Date : 2020-08-01 DOI: 10.1080/10800379.2020.12097361
W. Bandura
The study aims to determine the connection between trade openness, institutions and financial development for 26 countries in sub-Saharan Africa over the period 1982-2016. The analysis relies on system GMM estimation with 5-year (non-overlapping) averaged data. The results reveal no evidence of a significant impact of trade openness on financial development. There is, however, evidence of a positive (though statistically weakly significant) impact of institutional quality on the development of the financial sector. There is also no evidence of a significant joint impact of the trade openness and institution quality on financial sector development.
该研究旨在确定1982年至2016年期间撒哈拉以南非洲26个国家的贸易开放、制度和金融发展之间的联系。分析依赖于5年(非重叠)平均数据的系统GMM估计。研究结果显示,没有证据表明贸易开放对金融发展有显著影响。然而,有证据表明,制度质量对金融部门的发展有积极影响(尽管统计上不显著)。也没有证据表明贸易开放和制度质量对金融业发展有显著的共同影响。
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引用次数: 2
First Palestinian intifada and intergenerational transmission of human capital 第一次巴勒斯坦起义和人力资本的代际传递
Q4 Economics, Econometrics and Finance Pub Date : 2020-07-28 DOI: 10.1080/03796205.2022.2043769
Sameh Hallaq
Abstract This paper attempts to estimate the intergenerational transmission of human capital in Palestine. The main question is whether formal parental education improves their offspring’s cognitive skills and school achievements. I use the instrumental variable method in the estimations to overcome the potential endogeneity of parental education. The main source of variation in parental educational attainment is parents’ exposure to the First Palestinian Intifada (1988–1993) during their middle and high school ages. During the First Palestinian Intifada, many school days were lost due to frequent school closures and other restrictions. Furthermore, many young people preferred to search for low-skill employment in Israel, since it provided them with better wages than the local labour market and hardly required any level of educational attainment. This study employs two outcomes, namely the standardised cognitive test scores and school achievements during the academic year 2012/2013 for students between grade 5 and grade 9 in West Bank schools. Overall, the results support the hypothesis of a human capital spill-over but more so for girls than for boys, where the instrumental variables results are often insignificant because of their large standard errors.
摘要本文试图估计巴勒斯坦人力资本的代际传递。主要的问题是父母的正规教育是否能提高孩子的认知能力和学业成绩。我在估计中使用工具变量法来克服父母教育的潜在内生性。父母受教育程度差异的主要来源是父母在中学和高中时期接触第一次巴勒斯坦起义(1988-1993)。在第一次巴勒斯坦起义期间,由于学校频繁关闭和其他限制,许多学生失去了上课时间。此外,许多年轻人更喜欢在以色列寻找低技能的工作,因为以色列为他们提供了比当地劳动力市场更好的工资,而且几乎不需要任何教育水平。本研究采用了两种结果,即约旦河西岸学校5年级至9年级学生2012/2013学年的标准化认知测试成绩和学校成绩。总的来说,这些结果支持人力资本溢出的假设,但女孩比男孩更支持,因为工具变量的结果往往是微不足道的,因为它们的标准误差很大。
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引用次数: 3
A FORWARD GUIDANCE INDICATOR FOR THE SOUTH AFRICAN RESERVE BANK: IMPLEMENTING A TEXT ANALYSIS ALGORITHM 南非储备银行的前瞻性指标:文本分析算法的实现
Q4 Economics, Econometrics and Finance Pub Date : 2020-05-10 DOI: 10.1080/03796205.2020.1919424
Ruan Erasmus, H. Hollander
Abstract The expansion of central bank communications and the increased use thereof as a policy tool to manage expectations have led to an area of research, semantic modelling, that analyses the words and phrases used by central banks. We use text-mining and text-analysis techniques on South African Reserve Bank monetary policy committee statements to construct an index measuring the stance of monetary policy: a forward guidance indicator (FGI). We show that, after controlling for market expectations, FGIs provide significant explanatory power for future changes in the repurchase interest rate (the primary monetary policy instrument). Their out-of-sample predictive power is, however, weak. Furthermore, we show that FGIs are primarily driven by inflation expectations, which highlights the strong link between the SARB’s communication strategy and its inflation targeting mandate. In fact, we observe a systematic anti-inflation bias in the communicated stance of monetary policy—both absolutely and asymmetrically. Overall, Monetary Policy Committee (MPC) statements reflect relevant information on the inflationary stance and policy decisions of the South African Reserve Bank (SARB), but, since forecasts are conditional on current information, they provide unreliable forward guidance. Given this finding, MPC statements should emphasize the conditional nature of the SARB’s stance, and what that implies for the future path of the policy rate.
摘要中央银行通信的扩展及其作为管理预期的政策工具的日益使用,导致了一个研究领域,即语义建模,用于分析中央银行使用的单词和短语。我们对南非储备银行货币政策委员会的声明使用文本挖掘和文本分析技术,构建了一个衡量货币政策立场的指数:前瞻性指导指标(FGI)。我们发现,在控制了市场预期之后,FGI为回购利率(主要货币政策工具)的未来变化提供了重要的解释力。然而,它们的样本外预测能力较弱。此外,我们表明,FGI主要由通胀预期驱动,这突出了特区政府的沟通战略与其通胀目标授权之间的紧密联系。事实上,我们在货币政策的沟通立场中观察到了系统性的反通胀偏见——无论是绝对的还是不对称的。总体而言,货币政策委员会(MPC)的声明反映了南非储备银行(SARB)通胀立场和政策决定的相关信息,但由于预测是以当前信息为条件的,因此提供了不可靠的前瞻性指导。鉴于这一发现,货币政策委员会的声明应强调特区政府立场的条件性质,以及这对政策利率的未来路径意味着什么。
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引用次数: 1
Detecting the Environmental Kuznets Curve in African Countries 非洲国家环境库兹涅茨曲线的检测
Q4 Economics, Econometrics and Finance Pub Date : 2020-04-01 DOI: 10.1080/10800379.2020.12097355
A. Alsayed, A. Malik
The growth of the African economy is increasing rapidly since the last decades, but those economic activities affect environmental quality. Researches have shown that an increase in economic activities would lead to environmental degradation which may eventually cause environmental collapse. In this study we intend to examine the relationship between CO2 emission as a proxy of the environmental quality and gross domestic product (GDP) as a proxy of economic growth in Africa, then to detect and compare the Environmental Kuznets Curve (EKC) between African economic groups. An annual data of forty-eight (48) African countries classified into four economic levels according to World-Bank classification: lower income, lower middle income, lower upper income, and higher income countries for the period between 1960 to 2014, using panel data regression technique. The main findings show that there is a significant positive relationship between CO2 emission and GDP in Africa, as one unit of GDP increase, CO2 emission will increase by 0.37 metric ton in the African continent. Moreover, the analysis shows the existence of the EKC hypothesis of an inverted U-shape curve for all African economic levels with a higher turning point in higher income countries.
过去几十年来,非洲经济增长迅速,但这些经济活动影响到环境质量。研究表明,经济活动的增加会导致环境退化,最终可能导致环境崩溃。在本研究中,我们打算研究作为环境质量代表的二氧化碳排放与作为经济增长代表的国内生产总值(GDP)之间的关系,然后检测和比较非洲经济集团之间的环境库兹涅茨曲线(EKC)。采用面板数据回归技术,将48个非洲国家1960年至2014年间的年度数据按照世界银行的分类分为四个经济水平:低收入、中低收入、高收入和高收入国家。主要研究结果表明,非洲的二氧化碳排放量与GDP之间存在显著的正相关关系,每增加一个单位GDP,非洲大陆的二氧化碳排放量将增加0.37公吨。此外,分析表明,所有非洲经济水平都存在倒u型曲线的EKC假设,高收入国家的转折点较高。
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引用次数: 7
When Does Export Diversification Improve Economic Growth? A Comparative Analysis of Sub-Saharan African Countries 出口多样化何时能促进经济增长?撒哈拉以南非洲国家的比较分析
Q4 Economics, Econometrics and Finance Pub Date : 2020-04-01 DOI: 10.1080/10800379.2020.12097359
D. Yuni, N. Urama, U. Ugwuegbe, T. Agbanike
There has been increased interest in promoting export diversification as a means of ensuring sustainable growth in most developing countries. Yet, the arguments on the relationships between export diversity and economic growth is not settled in literature, with mixed findings concerning the sign and size of the correlation. This study assesses the relationship between export diversification and economic growth in selected Sub-Saharan African countries. Employing fixed effect and generalised least square regression models, with data from the World Bank, the findings show that a U-shaped relationship between export concentration and economic growth: the study finds a positive non-significant relationship for low-income countries, a positive and significant relationship for lower-middle-income countries and negative though not significant relationship for upper-middle-income countries.
人们对促进出口多样化越来越感兴趣,认为这是确保大多数发展中国家可持续增长的一种手段。然而,关于出口多样性与经济增长之间关系的争论并没有在文献中得到解决,关于这种相关性的符号和大小,研究结果喜忧参半。本研究评估了选定的撒哈拉以南非洲国家出口多样化与经济增长之间的关系。采用固定效应和广义最小二乘回归模型,结合世界银行的数据,研究结果表明,出口集中度与经济增长之间存在U型关系:研究发现,低收入国家与出口集中度之间存在正的非显著关系,中低收入国家为正显著关系,而中上收入国家为负显著关系。
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引用次数: 1
An Efficiency Analysis of Female Hair Dressers in Empangeni, South Africa: The Role of Infrastructure 南非恩潘格尼女性理发师的效率分析:基础设施的作用
Q4 Economics, Econometrics and Finance Pub Date : 2020-04-01 DOI: 10.1080/10800379.2020.12097358
R.T. Nokuthula, M.B. Tavonga
Infrastructure is widely considered an important determinant of firm performance but evidence on its importance on technical efficiency of hairdressers is very limited. Against this background, this study sought to compute and compare the technical efficiency levels of female hairdressers operating by the road side with those operating within formalised and designated salons. Primary cross-sectional data were collected using questionnaires and analysed within a quantitative research design. Technical efficiency was measured using a stochastic frontier technique which, in computing efficiency scores, separates the effect of random factors that are exogenous to the hairdressers. Based on a Cobb Douglas functional form chosen by relevant statistical tests, results from the stochastic frontier model estimated by the maximum likelihood confirm that hairdressers operating in designated saloons are more efficient when compared with hairdressers operating by the road side. A policy implication arising from this finding is that the provision of proper infrastructure is necessary to improve technical efficiency of hairdressers currently operating by the road side.
基础设施被广泛认为是公司业绩的重要决定因素,但关于其对理发师技术效率重要性的证据非常有限。在此背景下,本研究试图计算和比较在路边经营的女性理发师与在正规和指定沙龙经营的女性发型师的技术效率水平。使用问卷收集主要横断面数据,并在定量研究设计中进行分析。技术效率是使用随机前沿技术来衡量的,该技术在计算效率得分时,分离了理发师外部随机因素的影响。基于相关统计测试选择的Cobb Douglas函数形式,由最大似然估计的随机前沿模型的结果证实,与在路边经营的理发师相比,在指定沙龙经营的理发店效率更高。这一发现的政策含义是,提供适当的基础设施对于提高目前在路边经营的理发师的技术效率是必要的。
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引用次数: 0
Liquidity Risk and Asset Liability Mismatches: Evidence From South Africa 流动性风险与资产负债错配:来自南非的证据
Q4 Economics, Econometrics and Finance Pub Date : 2020-04-01 DOI: 10.1080/10800379.2020.12097357
G. Marozva, D. Makina
Using a panel of South African banks covering the period from 2005 t o 2015, we further develop, validate and test the liability mismatch index (LMI) developed by Bai, Krishnamurthy and Weymuller (2018). Deviating from their approach, we develop measures of liquidity that integrate both market liquidity and funding liquidity. Two liquidity measures developed are the bank liquidity mismatch index (BLMI) and the aggregate liquidity mismatch index (ALMI) whose performances are compared and contrasted with the Basel III liquidity measures and traditional liquidity measures. Overall, the two constructed liquidity indices perform better than other liquidity measures. Unlike the LMI, the BLMI and ALMI can be used to evaluate the liquidity of a given bank under liquidity stress events. Our empirical results, though not significant, also show that banks increase their liquidity buffers during times of turmoil as both BLMI and ALMI improved during the period 2007-2009.
利用2005年至2015年期间的南非银行小组,我们进一步开发、验证和测试了Bai、Krishnamurthy和Weymuller(2018)开发的负债错配指数(LMI)。与他们的方法不同,我们制定了整合市场流动性和融资流动性的流动性指标。开发的两种流动性指标是银行流动性错配指数(BLMI)和总流动性错匹配指数(ALMI),它们的表现与巴塞尔协议III流动性指标和传统流动性指标进行了比较和对比。总体而言,这两个构建的流动性指数表现优于其他流动性指标。与LMI不同,BLMI和ALMI可用于评估特定银行在流动性压力事件下的流动性。我们的实证结果虽然不显著,但也表明,随着2007-2009年期间BLMI和ALMI的改善,银行在动荡时期增加了流动性缓冲。
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引用次数: 5
Aggregational Effects in Extreme Value and Generalized Hyperbolic Models for Value-At-Risk Estimation: Evidence From the NYSE, FTSE, KRX and TWSE 风险价值估计的极值和广义双曲型模型中的聚集效应:来自纽约证券交易所、富时指数、KRX和TWSE的证据
Q4 Economics, Econometrics and Finance Pub Date : 2020-04-01 DOI: 10.1080/10800379.2020.12097356
Q. Mashalaba, C-K. Huang
The accurate estimation of Value-at-Risk (VaR) has become central to the measurement and management of financial risk - in particular, the financial risk inherent in investing in stock markets. While the Gaussian distribution is known to provide an unsuitable depiction of daily asset returns, it is a well-established fact that returns taken weekly, monthly or quarterly exhibits (progressively) more Gaussian behaviour. This paper examines such aggregational effect in using two popular families of distributions, namely extreme value models and generalized hyperbolic models, for VaR estimation and contrasts their behaviours against the corresponding Gaussian estimates. The data sets used are returns of indices extracted from the NYSE, FTSE, KRX and TWSE.
风险价值(VaR)的准确估计已成为衡量和管理金融风险的核心,尤其是投资股市固有的金融风险。虽然众所周知,高斯分布对每日资产回报率的描述不合适,但众所周知,每周、每月或每季度的回报率(逐渐)表现出更多的高斯行为。本文在使用两个流行的分布族(即极值模型和广义双曲模型)进行VaR估计时检验了这种聚集效应,并将它们的行为与相应的高斯估计进行了比较。所使用的数据集是从纽约证券交易所、富时指数、KRX和TWSE提取的指数回报率。
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引用次数: 1
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