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ECONOMIC ANALYSIS OF TECHNOLOGY AND PROPERTIES OF LEGENDRE-FENCHEL TRANSFORMATIONS legende - fenchel转换技术和特性的经济分析
IF 2.4 Pub Date : 2019-01-01 DOI: 10.20472/es.2019.8.2.011
Ilko Vrankic, Jasminka Šohinger, Mira Krpan
This paper examines a two-way relationship between convex analysis and microeconomic theory. Motivation for this paper are the observed similarities in the structure of the theory of consumer behavior and production theory. The fact that the behavior of variables is not determined by their nature but, rather, by their relationships is best illustrated and explained by using convex sets and convex analysis, which occupy central place in microeconomic theory. This paper is the result of efforts to make complex results of convex analysis and its application in microeconomic theory more transparent. Starting with the well-known economic phenomenon of profit maximization the authors derive in a novel way general results within the framework of convex analysis. From those results follow, directly and indirectly, the conclusions of the theory of consumer and producer behavior. The authors show that applying the Fundamental Theorems of Calculus opens up a new perspective in which the marginal cost curve can be interpreted as the marginal profit curve. This enables the derivation of Hotelling's lemma in a new way. Using the new interpretation of Hotelling's lemma, the authors reconstruct the cost function and confirm the Conjugate Duality Theorem of Legendre-Fenchel transformations. Relaxing the assumption of differentiability by describing the graph of the cost function as the envelope of its tangents, the authors rederive the properties of Legendre-Fenchel transformations and show that they hold in general. The path from the well-known economic facts to completely general conclusions of convex analysis is continued by applying the Conjugate Duality Theorem of Legendre-Fenchel transformations to the profit function. The essence of the dual characterization of technology by the profit function is illustrated by the graphical representation of linear homogeneity of the profit function. It results in the possibility to reconstruct the production function while using only the First Order Conditions to rederive Hotelling's lemma. It is this inductive-deductive approach used to examine the properties of Legendre-Fenchel trasformations and their application in the theory of consumer and producer behavior that establishes a two-way relationship between convex analysis and microeconomic theory.
本文探讨了凸分析与微观经济理论之间的双向关系。本文的动机是观察到消费者行为理论和生产理论在结构上的相似性。变量的行为不是由它们的性质决定的,而是由它们之间的关系决定的,这一事实可以用凸集和凸分析来最好地说明和解释,凸集和凸分析在微观经济理论中占据中心位置。本文是努力使凸分析的复杂结果及其在微观经济理论中的应用更加透明的结果。作者从著名的利润最大化经济现象出发,在凸分析的框架内,以一种新颖的方式推导出一般结果。从这些结果中,直接或间接地得出了消费者和生产者行为理论的结论。作者表明,运用微积分基本定理开辟了一个新的视角,即边际成本曲线可以解释为边际利润曲线。这使得霍特林引理的推导有了新的途径。利用Hotelling引理的新解释,重构了代价函数,证实了legende - fenchel变换的共轭对偶定理。通过将代价函数的图描述为其切线的包络,放宽了可微性的假设,作者重新推导了legende - fenchel变换的性质,并证明了它们一般成立。通过将legende - fenchel变换的共轭对偶定理应用于利润函数,延续了从众所周知的经济事实到凸分析的完全一般结论的路径。利润函数的线性同质性的图形表示说明了利润函数对技术的双重表征的本质。这使得仅使用一阶条件就可以重新推导霍特林引理,从而重构生产函数成为可能。正是这种用于检验勒让德-芬切尔变换的性质及其在消费者和生产者行为理论中的应用的归纳演绎方法,在凸分析和微观经济理论之间建立了双向关系。
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引用次数: 2
CONDITIONAL DEPENDENCE STRUCTURE IN THE PRECIOUS METALS FUTURES MARKET 贵金属期货市场的条件依赖结构
IF 2.4 Pub Date : 2019-01-01 DOI: 10.20472/ES.2019.8.1.006
M. Just, Aleksandra Łuczak, A. Kozera
The purpose of this paper was to assess the conditional dependence structure in the precious metals futures market in the period spanning from the beginning of 2000 to mid 2018. These time frames correspond to large fluctuations of quoted contract prices during the financial crisis. The dynamic Kendall’s tau coefficients and the dynamic tail dependence coefficients were used to assess the strength and dynamics of the nexus between rates of return on quoted prices of precious metals futures contracts. The coefficients were determined using the copula-based multivariate GARCH models, whereas the daily changes in the conditional dependence structure (changes in market state) were identified with the fuzzy c-means clustering method. In the study period, the conditional dependence structure in the precious metals futures market changed over time, as confirmed by the three identified market states. Of the contracts considered, gold and silver futures contracts demonstrated the strongest interrelationship and a relatively high likelihood of extreme events being transferred between them.
本文的目的是评估2000年初至2018年年中贵金属期货市场的条件依赖结构。这些时间框架与金融危机期间报价合同价格的大幅波动相对应。利用动态肯德尔τ系数和动态尾依赖系数来评估贵金属期货合约报价收益率之间联系的强度和动态。使用基于copula的多元GARCH模型确定系数,而使用模糊c均值聚类方法识别条件依赖结构的日变化(市场状态的变化)。在研究期间,贵金属期货市场的条件依赖结构随着时间的推移而变化,这一点得到了三种市场状态的证实。在考虑的合约中,黄金和白银期货合约表现出最强的相互关系,并且在它们之间转移极端事件的可能性相对较高。
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引用次数: 3
ASSESSMENT OF WEALTH DIVERSITY (CASE OF LITHUANIA) 财富多样性评估(以立陶宛为例)
IF 2.4 Pub Date : 2019-01-01 DOI: 10.20472/es.2019.8.1.008
O. Rakauskienė, Vaida Servetkienė, Lina Volodzkiene
The high level of income and wealth distribution in the world is recognized as a phenomenon that leads to negative economic and social consequences. The imperfection of redistribution levers in the economy has created conditions for the concentration of resources, material goods and wealth in small population groups. Today, the economic system is not focused on majority of the population, and therefore the high level of inequality and its consequences for economic growth, well-being and human development cannot be ignored. In this context, too high economic inequality in Lithuania is one of the most sensitive problems of the country; Lithuania is an anti-leader in the European Union according to economic inequality.Conventionally, economic inequality is measured using such methods as distribution of income and consumption of the population, however, to find out the real level of inequality, wealth diversity should be studied as well. The main purpose of this article is to identify and emphasise wealth diversity as an inseparable part of economic inequality in Lithuania and, as a result, the poor quality of life and obstacles in the way of economic progress as well as to compare wealth inequality with income inequality in Lithuania.The authors organised a representative poll of Lithuanian citizens and used a certain survey to collect information about the dwelling-places or other types of assets owned by the respondents as well as to evaluate wealth diversity in the country. The results show that the edge value of the assets owned by the representatives between I and X deciles differs by 16.9 times. However, comparing the average prices of dwelling-places in deciles I and X, the difference amounts to 7.2 times. Assessing all types of assets, including accommodation, land, durable goods, etc., it has been revealed that the distribution of wealth exceeds the limit of income and consumption distribution established by various statistical organisations and by the authors themselves. The decile ratio (in relation to deciles I and X) equals to 40.8, thus, it considerably exceeds the level of income and consumption inequality.
世界上收入和财富分配的高水平被认为是一种导致消极经济和社会后果的现象。经济中再分配杠杆的不完善为资源、物质产品和财富集中在少数人口群体中创造了条件。今天,经济制度的重点并不是大多数人口,因此,高度不平等及其对经济增长、福祉和人类发展的影响是不容忽视的。在这方面,立陶宛过高的经济不平等是该国最敏感的问题之一;由于经济不平等,立陶宛是欧盟的反领导人。传统上,经济不平等是通过收入分配和人口消费等方法来衡量的,但是,为了找出真正的不平等程度,还应该研究财富多样性。本文的主要目的是确定和强调财富多样性是立陶宛经济不平等的一个不可分割的部分,因此,生活质量差和经济进步道路上的障碍,以及比较立陶宛的财富不平等和收入不平等。作者对立陶宛公民进行了一次有代表性的民意调查,并利用某种调查来收集有关受访者所拥有的住所或其他类型资产的信息,并评估该国的财富多样性。结果表明,代表所拥有的资产在1和X十分位数之间的边缘值相差16.9倍。然而,比较I和X十分位数的住房平均价格,差距达到了7.2倍。评估所有类型的资产,包括住房、土地、耐用品等,发现财富的分配超过了各种统计组织和作者自己确定的收入和消费分配的限制。十分位数比率(相对于十分位数I和十分位数X)等于40.8,因此,它大大超过了收入和消费不平等的水平。
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引用次数: 0
DEVELOPMENT OF REAL UNIT WAGE COSTS ON THE MACRO- AND MEZO-LEVEL OF THE CZECH REPUBLIC 捷克共和国实际单位工资成本在宏观和中观层面的发展
IF 2.4 Pub Date : 2019-01-01 DOI: 10.20472/es.2019.8.2.004
B. Kadeřábková, E. Jašová
: The aim of the paper is to analyse the development and the level of cost inflation pressures originating from the labour market in terms of the different levels of the Czech Republic. At first, we will mention several definitions of unit labour costs and the reasons for their examination and monitoring. Then we will select the concept of the nominal and real unit wage costs and data for the macro-level and mezzo-level in the Czech Republic. It is also evaluated the development of real unit wage costs indicator on individual levels of the Czech Republic and extent the wage inflation potential on them. Finally, we localize the first clues about the negative impact of wages on prices on the mezzo-level, which can be used for creating the prediction of the national economy in the near future.
本文的目的是分析捷克共和国不同水平的劳动力市场的发展和成本通胀压力的水平。首先,我们将提到单位劳动力成本的几种定义以及对其进行检查和监测的原因。然后,我们将选择捷克共和国名义和实际单位工资成本的概念和宏观层面和中间层面的数据。本文还评价了捷克共和国个别水平的实际单位工资成本指标的发展情况,以及这些指标的工资通货膨胀潜力。最后,我们将工资对价格的负面影响的第一个线索定位在中间水平,这可以用于创建国民经济在不久的将来的预测。
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引用次数: 10
THE SHADOW ECONOMY IN THE EASTERN PARTNERSHIP COUNTRIES: MODELLING AND ESTIMATING IN THE CONTEXT OF THE NEEDS TO DEVELOP ECONOMIC COOPERATION BETWEEN THE EUROPEAN UNION AND EASTERN PARTNERSHIP COUNTRIES 东部伙伴关系国家的影子经济:在欧盟与东部伙伴关系国家之间发展经济合作需要的背景下进行建模和估计
IF 2.4 Pub Date : 2019-01-01 DOI: 10.20472/es.2019.8.1.001
R. Banelienė, B. Melnikas
The paper deals with a highly complicated problem related to the development of economic relations between the European Union and the so-called Eastern Partnership countries – Armenia, Azerbaijan, Belarus, Georgia, Moldova and Ukraine. The essence of the problem is the extremely excessive level of the shadow economy in the Eastern Partnership countries: the shadow economy considerably affects the situation in the Eastern Partnership countries and it causes in addition a profound negative impact on the economic cooperation with the European Union. The assessment and monitoring of shifts in shadow economies in the Eastern Partnership countries is a crucial issue for the European Union, in particular to make responsible and reasoned policy decisions on the economic cooperation between the European Union and the Eastern Partnership countries. This fact leads to the needs to create and use adequate instruments for modelling and evaluating the shadow economy. The opportunities of using various tools for modelling and evaluating the shadow economy are discussed herein. The main focus of attention is directed to the new integrated approach to shadow economy modelling: this approach is distinguished by the fact that the shadow economy is analyzed and assessed in a holistic manner upon taking into account the different aspects of economic life and economic development processes. A new model applicable to the assessment of the shadow economy in the Eastern Partnership countries is described; this model is based on the idea of the so-called Tanzi model and was developed by covering the traditionally used independent variables such as taxes, wages and salaries, as well as the new modified indicators. The paper describes empirical research on modelling and estimating of the scope and dynamics of the shadow economy in the Eastern Partnership countries, as well as the principal results of the said research. It has been shown that the shadow economy in the Eastern Partnership countries is highly, extensively and even dangerously developed. The results of the research show an existence of a link between the size of the shadow economy and the control of corruption, but this link is very diverse in different countries. The methodological approach and research results presented in the paper can be used to create a decision support system for the development of the economic relations between the European Union and the Eastern Partnership countries.
这篇论文论述了欧洲联盟与所谓的东方伙伴关系国家- -亚美尼亚、阿塞拜疆、白俄罗斯、格鲁吉亚、摩尔多瓦和乌克兰- -之间经济关系发展的一个高度复杂的问题。问题的实质是东部伙伴关系国家的影子经济水平极度过高:影子经济严重影响了东部伙伴关系国家的形势,并对与欧盟的经济合作造成了深刻的负面影响。评估和监测东部伙伴关系国家影子经济的变化对欧盟来说是一个至关重要的问题,特别是对欧盟与东部伙伴关系国家之间的经济合作做出负责任和合理的政策决定。这一事实导致需要创建和使用适当的工具来模拟和评估影子经济。本文讨论了使用各种工具对影子经济进行建模和评估的机会。主要关注的焦点是影子经济建模的新综合方法:这种方法的特点是,考虑到经济生活和经济发展过程的不同方面,以整体的方式对影子经济进行分析和评估。提出了一种适用于东方伙伴关系国家影子经济评估的新模型;该模型基于所谓的Tanzi模型的思想,通过涵盖传统上使用的独立变量,如税收、工资和薪金,以及新的修改指标,而发展起来。本文介绍了对东部伙伴关系国家影子经济的范围和动态进行建模和估计的实证研究,以及研究的主要成果。研究表明,东部伙伴关系国家的影子经济高度、广泛甚至危险地发展。研究结果表明,影子经济的规模与腐败的控制之间存在联系,但这种联系在不同的国家差别很大。本文提出的方法方法和研究成果可用于为欧盟与东方伙伴关系国家之间经济关系的发展创建一个决策支持系统。
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引用次数: 0
IS EXCHANGE RATE EFFECT TRADE BALANCE IN PAKISTAN? EVIDENCE BASED ON J- CURVE 汇率对巴基斯坦的贸易平衡有影响吗?基于j曲线的证据
IF 2.4 Pub Date : 2019-01-01 DOI: 10.20472/es.2019.8.2.005
Aamir Khan, Muhammad Arshad Khan, A. Salman
This study aims to find out the relationship of how exchange rate effect the balance of trade in Pakistan over the period 1982-2016 within the context of J-curve phenomenon. We employed an Autoregressive Distributed Lag (ARDL) approach to cointegration. To investigate the short run dynamics of the study, we have estimated an error correction model. The unit root results provide a mix of I(0) and I(1) variables. The results of diagnostic tests indicate no econometric problem in the estimated model. The CUSUM and CUSUM of squared test confirms the stability of the estimated model. We summarize the estimated results as follow: first, we found an evidence of cointegration among the variables. Second, the long run results shows significant effect of REER on trade balance in Pakistan. Third, we found an evidence of J-curve in case of Pakistan.
本研究的目的是在j曲线现象的背景下,找出1982-2016年期间汇率对巴基斯坦贸易平衡的影响关系。我们采用自回归分布滞后(ARDL)方法进行协整。为了研究研究的短期动态,我们估计了一个误差修正模型。单位根结果提供了I(0)和I(1)个变量的混合。诊断试验的结果表明,估计模型中没有计量经济学问题。CUSUM和CUSUM的平方检验证实了估计模型的稳定性。我们总结了估计结果如下:首先,我们发现了变量之间协整的证据。第二,长期结果显示REER对巴基斯坦贸易平衡的影响显著。第三,我们在巴基斯坦的案例中发现了j曲线的证据。
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引用次数: 1
DOES BANCASSURANCE AFFECT PERFORMANCE OF NON-LIFE INSURANCE SECTOR – CASE OF EU COUNTRIES 银行保险是否影响非寿险部门的业绩——以欧盟国家为例
IF 2.4 Pub Date : 2019-01-01 DOI: 10.20472/iac.2018.040.049
Tomislava Pavic Kramaric, I. Pavić
The aim of this paper is to test the influence of bancassurance as a distribution channel on performance of non-life insurance sector in selected European countries. The analysis refers to 2009 ? 2015 period and it is conducted using static panel analysis. Performance measures employed comprise of sales profitability as well as of profitability ratio of technical activity whereas independent variables used in the model include share of bancassurance, market share, gross written premium growth rate, claims growth rate, insurance density, share of premium in GDP, share of reinsurance and number of insurance companies. The results of the analysis in both models reveal that market share prove to be statistically significant determinant of insurance sector performance negatively affecting performance. Furthermore, insurance density has statistically significant and positive influence on performance measured with profitability ratio of technical activity.
本文的目的是测试银行保险作为一种分销渠道对欧洲国家非寿险部门业绩的影响。分析指的是2009年?2015年期间,使用静态面板分析进行。所采用的绩效指标包括销售盈利能力以及技术活动的盈利能力比率,而模型中使用的自变量包括银行保险份额、市场份额、总书面保费增长率、索赔增长率、保险密度、保费占GDP的份额、再保险份额和保险公司数量。两种模型的分析结果都表明,市场份额在统计上是保险业绩效的显著决定因素,对绩效有负向影响。此外,保险密度对以技术活动利润率衡量的绩效有显著的正影响。
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引用次数: 4
FINANCIAL DISTRESS OF COMPANIES AND CASH FLOW-INVESTMENT-SENSITIVITY: EVIDENCE FROM PANEL OF NON-FINANCIAL FIRMS 公司财务困境与现金流投资敏感性:来自非金融公司小组的证据
IF 2.4 Pub Date : 2019-01-01 DOI: 10.20472/ES.2019.8.1.004
A. Haque, Ammar Abid, M. Qamar, S. Asif
This paper aims to investigate the effects of cash flow-investment sensitivity over firms facing varying levels of financial distress. For this purpose, cash flow, dividend policy, firm’s age, and size are used to create subsamples of firms facing different degrees of financial constraints. Using an unbalanced panel of 336 non-financial firms listed at Pakistan Stock Exchange over the period from 2006 to 2017, we provide evidence that the prevailing financial constraints affect the investment decisions of sample firms. Financial distress, as identified by cash flow, dividend policy and size of the firm, increases with the rise of cash flow-investment-sensitivity, thus substantiating the use of these measures as indicators of financial distress. Furthermore, evidence of the U-shaped investment curve is found when the sample is split on the basis of cash flow, suggesting a non-linear relation between cash flow and investment. The results shed light on the relation between financial and real cycle downturns suggesting the need for economic policies to be countercyclical with respect to financial and credit conditions.
本文旨在探讨现金流投资敏感性对面临不同程度财务困境的企业的影响。为此,我们使用现金流量、股利政策、公司年龄和规模来创建面临不同程度财务约束的公司的子样本。利用2006年至2017年期间在巴基斯坦证券交易所上市的336家非金融公司的不平衡面板,我们提供了证据,表明普遍的财务约束影响样本公司的投资决策。由现金流、股利政策和公司规模确定的财务困境随着现金流投资敏感性的提高而增加,从而证实了这些措施作为财务困境指标的使用。此外,在现金流的基础上对样本进行拆分,发现了u型投资曲线的证据,表明现金流与投资之间存在非线性关系。研究结果揭示了金融和实际周期衰退之间的关系,表明经济政策需要在金融和信贷条件方面具有反周期性。
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引用次数: 0
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International Journal of Economic Sciences
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