Добірка наукової літератури з теми "Generalized diversification index"

This study aims to analyze the effects of market power and type of ownership on bank’s income diversification in Indonesia, Malaysia, the Philippines, Thailand, and China. Banks diversifies their source of income to stabilize profitability level. Bank’s market power is a critical factor which affect its income diversification efforts. This study uses Lerner Index as a proxy for banks’ market power. By using a sample of 80 banks in five countries from 2012 to 2016 and operating Fixed Effect Model and Generalized Least Square, the result shows that banks with greater market power earn more non-interest income, except in the Philippines. Also, government ownership is proven to heighten the relation between market power and income diversification, with consistent results shown in each subsamples. Foreign ownership also heighten the relation between market power and income diversification, except in Thailand.

Exploiting data of Vietnam Household Living Standard Survey 2010, the study aims at finding determinants of income diversification at household level in rural Vietnam and evaluating effects of income diversification on household income. The data set covers 6,571 rural households of eight socio-economic regions. Herfindahl-Hirschman index (HHI) is applied to show income diversification at household level. Two-limit tobit model is applied to detect the effects of household features and community characteristics on HHI, and then generalized method of moments (GMM) is employed to test the effects of HHI on household income. The results show that human capital in both quantity and quality terms plays a substantial role in encouraging rural households to diversify their income-generating activities. Rural households with higher education level and higher diversification ability tend to have more diverse income sources. Owning larger sources of physical capital, or better credit accessibility, and social capital also helps rural households improve income diversity. The results also confirm that income diversification is the dynamic of rural income improvement. Households can increase their income by diversifying their farm and non-farm activities.

Purpose On the backdrop of growing importance of Shariah compliant equity markets, the purpose of this paper is to study cross-country portfolio diversification benefits for investors with major trading partners of Saudi Arabia, namely, USA, China, Japan, Germany and India, who have already invested or tend to invest in Saudi Arabian stock market. Design/methodology/approach The authors have investigated time invariant, dynamic correlations at different investments horizons of the investors among Islamic asset classes by applying relevant econometric techniques like multivariate generalized autoregressive conditional heteroscedastic –DCC and continuous wavelet transforms. For robustness, this study also applied maximal overlap discrete wavelet transform. Findings The findings tend to indicate that the Saudi Arabian investors have portfolio diversification benefits with all major trading partners in the short-term investment horizon. Interestingly, Saudi Arabian market has the least portfolio diversification benefits with the Chinese market. However, in the long run, all markets are correlated, yielding minimum portfolio diversification benefits and most importantly Saudi Arabian investors have portfolio diversification benefits with the Indian Islamic equity market in almost all investment horizons. The findings are highly consistent across different econometric technique estimations. Research limitations/implications The authors are only considering five major trading partners of Saudi Arabia. Also, the authors are using S&P and FTSE shari’ah index. Moreover, the time period of the study is constrained by the availability of shari’ah indices. Econometric limitations are also well documented in the literature. Practical implications The results could be beneficial for the investors, portfolio managers, hedge fund managers and institutional investors and also could be useful for the policy makers in their policy-making decisions. Originality/value Only very few studies have looked into the benefits of international portfolio diversification from the perspective of local investors as well as the portfolio diversification benefits with the major trading partners of Saudi Arabia. One of the novelties of the method is to make the stock investors, practitioners and policy makers aware of the portfolio diversification benefits available at different time scales such as 4, 8, 16, 32, 64 and 256 trading days as investment holding periods to unveil the true dynamics of co-movement between those different assets.

The aim of the paper is to find out whether euro is a convenient substitution for U.S. dollar as an anchor currency for Iranian rial and whether this replacement would affect Iran’s international trade positively. We explore these effects via Optimum Currency Area (OCA) theories using generalized least square from 2000 to 2018. Based on OCA index, euro would be a good substitution for U.S. dollar as an anchor for Iranian rial. In addition, gravity model and Generalized Method of Moments estimation confirm that substitution of U.S. dollar by euro would improve bilateral trade between Iran and its major trade partners especially the European Economic and Monetary Union (EMU). Furthermore, we confirm that a basket containing main currencies (euro, U.S. dollar, yuan, Russian rubble) would be more efficient than a single currency anchor however euro should be prominent in the basket. Such a change of anchor could positively contribute to reduction of transaction costs, diversification of external risk, rise of mutual trade exchanges between Iran and the EMU or the EU and consequent economic growth of trade partners. The paper contributes to the existing literature by comprehensive methodological approach how to identify an appropriate anchor currency.

Purpose This study aims to investigate the spillover between the Middle East and North Africa (MENA) stock index and several security indices, including Sukuk and conventional bond, and ultimately compare the hedge effectiveness of Sukuk and conventional bond. Design/methodology/approach The study uses VAR (1)-asymmetric Baba, Engle, Kraft and Kroner-multivariate generalized autoregressive conditional heteroskedasticity (1,1) model to analyze the volatility and shock and asymmetric shock spillover between Sukuk index and several bond indices in the MENA region including, Bond, All Bond, High Yield Bond and Bond and Sukuk and MENA stock market index and ultimately compare the hedging capabilities of Sukuk and conventional bonds by calculating the optimal portfolio weights for securities indices and stock portfolios and hedge effectiveness of security indices. Findings Results indicate that there is no shock, volatility and asymmetric shock spillover between the Sukuk index and MENA stock index, implying that Sukuk indices behave independently from MENA stock indices; however, there is shock and asymmetric shock spillover between MENA stock indices and security indices that include conventional bonds. The result of optimal portfolio weights and corresponding hedge effectiveness indicate that Sukuk is the most significant asset among other security indices in diversifying and hedging stock MENA portfolios. Moreover, the hedge effectiveness of Sukuk shows persistent trends during both the normal and crisis periods. Practical implications The study suggests that MENA stock market investors and investment managers should add Sukuk instead of the conventional bond to their portfolio to hedge their portfolio against investment risks during both normal and crisis periods. Originality/value Although many studies compare many aspects of Sukuk and conventional bonds, this is the first study that compares the hedge effectiveness of Sukuk and conventional bond based on the time-varying optimal portfolio weights strategy.

<abstract> <p>This paper examines if clean energy stocks help investors in managing carbon risk. We use the price of the European Union Allowance (EUA) and European clean energy index (ERIX) for the three phases of the EU-Emission Trading Scheme. Analyzing the time-varying correlation and volatility of EUA stock and ERIX through generalized orthogonal GO-GARCH model, the empirical results reveal relative independence of the European renewable energy market from the carbon market providing diversification benefits and value addition by including carbon assets in clean energy stock portfolio. Furthermore, three portfolios with different weight allocation strategies reveal that the carbon asset provides risk and downside risk benefits when mixed with a clean energy stock portfolio. These results are useful for investors who enter the market for value maximization and the regulators striving to make strategies for managing carbon risk.</p> </abstract>

Oil, also called black gold, is considered as the commodity which has the greatest impact on the world’s economy, and it has been studied in terms of its relationship and effects on macroeconomic variables such as Gross Domestic Product (GDP), inflation, trade balance, exchange rate and some others. Likewise, the relationship of oil with the financial market has been deepened and is very interesting in the case of emergent economies such as Brazil, Russia, India and China (BRIC) countries. There are many studies and approaches to this topic, but few of them focus on seeking investment opportunities through the diversification of these variables and therefore creating efficient portfolios using other distribution from the norm. This research proposes the construction of diversified portfolios with the returns of the indexes and oil mixes of the BRIC countries modeled under a Normal Inverse Gaussian (NIG) distribution, which is a notable member of the Generalized Hyperbolic (GH) family, and analyzing the effect on investment, by the inclusion of each variable into the portfolio. An important property of the GH family is that the correlations matrix of the returns is obtained from estimation of the parameters of empirical distribution through maximum likelihood. The results show in an optimal configuration, that each instrument of India, China and Brazil, contributes to the portfolio efficiency, in contrast to the index and oil mix of Russia, that do not contribute significantly.

The purpose of this study is to investigate whether securitization affect financial stability and risk of banks issued from emerging countries during the period 2007 to 2017.To reach this end we conduct dynamic panel data econometrics with Generalized Methods of Moments (GMM) system on 20 banks issued from emerging countries. The dependent variables are defined by “Bank Stability Index” (BSI) and “logarithm of z-score” and ratios of total risk and credit risk. The independent variables are split into variable of interest (securitization ratio), bank-specific variables (capital adequacy, profitability, on-balance sheet interest rate risk, financial margin, income diversification, liquidity and bank size) and country-specific variables (GDP and inflation).As major conclusion, we find that using securitization - by banks from emerging countries – enhances their financial stability and minimizes their total risk and credit risk.As a practical contribution to this work, we suggest that banks' decision-makers in emerging countries increase their use of securitization in order to benefit from its beneficial effect on their financial stability and risks.

Purpose Using a data set comprising 16 European office markets provided by the DTZ Research Institute from Q1 2003 to Q4 2013, the purpose of this paper is to measure the strength of the unconditional transmission of volatility in the returns to direct property between 16 European office markets with the objective of determining the degree of unconditional spillover between markets. Design/methodology/approach To examine volatility spillovers across the 16 office markets, the authors adopted the generalized VAR methodology, variance decomposition and the generalized spillover index of Diebold and Yilmaz (2012) by measuring cross-office market volatility transmission in asset pricing through estimates of several “volatility spillover indices.” Findings Volatility spillovers are important and time-varying across the leading office markets, with cross-market volatility interaction being bi-directional and of relative endogenous nature for many markets. The London office market is the “volatility leader” and has exerted significant net volatility influence on the other markets. Additionally, the volatility spillovers between business cycle fluctuations and asset market cycle volatilities are linked across some European economies. Research limitations/implications Evidence of co-integration among the domestic volatility spillover cycles implies the presence of unobserved common shocks and might not be good news for international investors who pursue diversification strategies in European office real estate markets. Originality/value No previous study has addressed formally the measurement and assessment of the nature and intensity of volatility spillovers across direct office markets on such a broad range of European office markets. The relevance of the topic has been even increasing over the previous years as more and more investors seek for flexibility and participation in the investment process and asset management.

Дисертація на здобуття наукового ступеня кандидата економічних наук за спеціальністю 08.00.02 – Світове господарство і міжнародні економічні відносини. – Харківський національний університет імені В.Н. Каразіна Міністерства освіти і науки України, Харків, 2018. Дисертація присвячена поглибленню теоретико-методичних засад дослідження диверсифікації ринку природного газу ЄС та обґрунтуванню перспективних напрямів підвищення енергетичної безпеки ЄС за рахунок диверсифікації ринку газу. У роботі запропоновано енергетичну безпеку трактувати як інтегральну категорію, яка охоплює соціальні, економічні, політичні, технологічні і екологічні фактори і характеризує стан забезпечення економіки енергоресурсами, за якого потреби у енергії задовольняються за стабільними та доступними цінами шляхом використання енергоресурсів з внутрішніх та зовнішніх джерел і стратегічних резервів через надійну та захищену внутрішню енергетичну інфраструктуру і диверсифіковані та стабільно доступні зовнішні джерела, не створюються загрози сталому розвитку та екологічній безпеці і впроваджені механізми мінімізації наявних і потенційних ризиків для енергетичної сфери. У ході дослідження з’ясовано, що в ЄС безпека постачання енергоресурсів визначається як стан забезпечення енергоресурсами, за якого основні енергетичні потреби мають бути задоволені завдяки спільному використанню внутрішніх енергетичних ресурсів та стратегічних резервів у прийнятних економічних умовах та з використанням диверсифікованих та доступних зовнішніх джерел. Проведено аналіз структури та особливостей сучасного ринку газу ЄС і встановлено, що цей ринок займає одне з ключових місць в загальній структурі виробництва первинної енергії в ЄС, а загальним вектором його розвитку є формування єдиного конкурентоспроможного ринку, ключовими елементами якого є вільна конкуренція та біржове ціноутворення на високоліквідних газових хабах. Виявлено, що концепція диверсифікації на основі довгострокових контрактів, яка останнім часом була традиційною в ЄС, на даний час не може повною мірою забезпечити отримання додаткових обсягів імпорту газу. Найбільш привабливою альтернативою є концепція диверсифікації на основі розвитку конкуренції. Запропоновано концептуально-методичний підхід до оцінки рівня диверсифікації ринку газу ЄС на основі індексу диверсифікації ринку, який дозволяє оцінити рівень диверсифікації ринку за основними його аспектами. Удосконалено інструментарій кількісної оцінки рівня диверсифікації зовнішніх джерел постачання, який дозволяє оцінити рівень їх диверсифікації з урахуванням політичної стабільності та економічної доцільності щодо держав-постачальників. Розроблено модель диверсифікації ринку газу, яка дозволяє оцінити як рівень диверсифікації ринку за основними аспектами, так і загальний рівень диверсифікації ринку газу в цілому. Здійснено оцінку рівня диверсифікації ринку газу ЄС і встановлено, що поточний рівень диверсифікації відповідає нормальному рівню диверсифікації. Обґрунтовано перспективні напрями підвищення енергетичної безпеки ЄС за рахунок диверсифікації ринку газу. Визначено пріоритетні шляхи підвищення рівня диверсифікації ринку природного газу України, реалізація комплексу завдань за якими забезпечить задовільний загальний рівень диверсифікації вітчизняного ринку природного газу та є передумовою успішної інтеграції до ринку природного газу ЄС. The thesis for the degree of Candidate of Economic Sciences, speciality 08.00.02 – World Economy and International Economic Relations. – V.N. Karazin Kharkiv National University of the Ministry of Education and Science of Ukraine, Kharkiv, 2018. The thesis is devoted to the in-depth study of the theoretical and methodological research principles of the EU natural gas market diversification as well as to the substantiation of perspectives for the EU energy security increase due to the diversification of gas market. Various approaches to the interpretation of energy security by international organizations, individual countries and academic researchers have been explored in the thesis. It has been established that energy security can be explored either under a one-sided approach based on the security of energy supply or under a multi-faceted approach that takes into account a number of other important aspects of energy security, such as energy availability, energy efficiency and environmental safety. By generalizing the existing approaches to the definition of energy security it has been established that energy security in its broad sense is defined as the state of the Economy energy resources supply, with no threats to sustainable development, and where the mechanisms for compensating existing and potential risks, that may arise as a result of the negative influence of internal or external factors, are implemented. The paper proposes to treat energy security as an integral category that covers social, economic, political, technological and environmental factors and characterizes the state of the economy's energy supply, in which energy needs (in various forms and in sufficient quantities) are met at stable and affordable prices through the use of energy resources from internal and external sources and strategic reserves through a reliable and secure internal energy infrastructure and diversified and stable external energy supply sources, no threat to sustainable development and environmental safety, and mechanisms for minimizing existing and potential risks for the energy sector are introduced. It has been established that central component of the EU energy security is the energy supply security, which means the availability of continuous access to energy resources at affordable prices. The availability of energy resources is a multidimensional concept, the components of which are diversification of energy resources suppliers, spatial diversification of energy resources distribution, diversification of type energy resources and diversification of supply routes (pipelines). The study found that in the EU energy security supply is defined as a state of energy supply, in which the basic energy requirements should be covered through the joint use of internal energy resources and strategic reserves under acceptable economic conditions involving diversified and accessible external sources. Diversification encompasses three aspects: the diversification of supply sources, suppliers, and location of energy objects by spatial criterion. It has been discovered that in order to maintain the appropriate energy security level the energy sector should be characterized by the diversification of the complex of primary energy sources; diversification of electricity production at the expense of gas; diversification of the portfolio of energy resources suppliers; diversification of supply routes for imports; a tendency to reduce the energy intensity of GDP; reliable energy infrastructure; affordable prices. Evaluating the place and role of the diversification in the system of factors of ensuring the EU energy security as one of the largest importers of energy resources in the world, it was established that under the assurance of EU energy security is understood the process of reducing dependence on external energy suppliers through the development of own energy production, diversification of the internal energy portfolio and diversification of the energy resources supply from external sources, the formation of sufficient strategic energy resources reserves, energy efficiency, decarbonisation as a means to combat climate change and minimize pollution. The analysis of the structure and features of the modern EU gas market has proved that this market takes one of the key places in the overall structure of primary energy production in the EU, and its general development trend is the formation of a single competitive market by means of free competition and stock pricing in the most liquid gas hubs. It has been discovered that the concept of diversification on the basis of various longterm contracts can not at this time fully ensure the receipt of additional volumes of gas imports. The most attractive alternative for the coming years is the concept of supply diversification based on the development of competition. The conceptual-methodical approach to assessing the level of diversification of the EU gas market based on the market diversification index is proposed, which allows us to assess the level of market diversification in its main aspects. It is noted that the gas market diversification index is a quantitative measure of how much energy security is ensured in the aspect of diversifying gas supply. The tools for quantifying the level of diversification of external sources of supply have been improved, which allows us to assess the level of their diversification, taking into account political stability and economic expediency. The gas market diversification model is developed, which allows quantitatively and qualitatively to assess both the level of the gas market diversification in its main aspects and the overall level of the gas market diversification as a whole. The assessment of external and internal aspects of the EU gas market diversification has proved that the current level of diversification corresponds to the correct level of diversification according to the proposed scale of assessment. The analysis of the obtained assessments of the EU gas market diversification level has been carried out and promising directions of increasing EU energy security due to natural gas market diversification are provided. The program of diversification of the gas market of Ukraine is proposed on the basis of the analogue of the existing N-1 gas infrastructure standard in the EU. The priority directions of increasing the Ukraine natural gas market diversification level are identified, realization of the tasks complex on which proposed target indicators of Ukraine natural gas market diversification level on the main internal and external aspects inherent in the EU natural gas market, will provide a satisfactory overall level of the domestic natural gas market diversification and is a prerequisite for successful integration with the EU natural gas market. Obtained variants of target values of diversification as target parameters can then be based on the diversification programs and determine the main promising directions of Ukraine natural gas market development in terms of increasing energy efficiency, changing the structure of the energy mix, reduction of natural gas consumption, decreasing the dependence on imports, increasing the diversification level of the external supply sources and suppliers.

The aim of the study was to compare a patch-mosaic pattern in the old-growth forest stands developed in various climate and soil conditions occurring in different regions of Poland. Based on the assumption, that the patch-mosaic pattern in the forest reflect the dynamic processes taking place in it, and that each type of forest ecosystem is characterized by a specific regime of natural disturbances, the following hypotheses were formulated: (i) the patches with a complex structure in stands composed of latesuccessional, shade-tolerant tree species are more common than those composed of early-successional, light-demanding ones, (ii) the patch-mosaic pattern is more heterogeneous in optimal forest site conditions than in extreme ones, (iii) in similar site conditions differentiation of the stand structure in distinguished patches is determined by the successional status of the tree species forming a given patch, (iv) the successional trends leading to changes of species composition foster diversification of the patch structure, (v) differentiation of the stand structure is negatively related to their local basal area, especially in patches with a high level of its accumulation. Among the best-preserved old-growth forest remaining under strict protection in the Polish national parks, nineteen research plots of around 10 ha each were selected. In each plot, a grid (50 × 50 m) of circular sample subplots (with radius 12,62 m) was established. In the sample subplots, species and diameter at breast height of living trees (dbh ≥ 7 cm) were determined. Subsequently, for each sample subplot, several numerical indices were calculated: local basal area (G), dbh structure differentiation index (STR), climax index (CL) and successional index (MS). Statistical tests of Kruskal- Wallis, Levene and Generalized Additive Models (GAM) were used to verify the hypotheses. All examined forests were characterized by a large diversity of stand structure. A particularly high frequency of highly differentiated patches (STR > 0,6) was recorded in the alder swamp forest. The patch mosaic in the examined plots was different – apart from the stands with a strongly pronounced mosaic character (especially subalpine spruce forests), there were also stands with high spatial homogeneity (mainly fir forests). The stand structure in the distinguished patches was generally poorly related to the other studied features. Consequently, all hypotheses were rejected. These results indicate a very complex, mixed pattern of forest natural dynamics regardless of site conditions. In beech forests and lowland multi-species deciduous forests, small-scale disturbances of the gap dynamics type dominate, which are overlapped with less frequent medium-scale disturbances. In more difficult site conditions, large-scale catastrophic disturbances, which occasionally appear in communities formed under the influence of gap dynamics (mainly spruce forests) or cohort dynamics (mainly pine forests), gain importance.