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101.
José-María Montero Gema Fernández-Avilés María-Carmen García 《Revue internationale de statistique》2010,78(3):330-347
Energy supply and demand, and as a consequence energy prices, are likely to represent one of the biggest challenges of the 21st century. Commodity markets exhibit increased volatility when there is little or no underutilized supply capability to meet natural fluctuations in demand. In the case of energy markets, the large capital requirements and significant lead times associated with energy production and delivery make them more susceptible to the imbalances in supply capability and demand. Energy price volatility has destructive impact on market agents, and this impact is intensified when the prices exhibit asymmetric volatility. This article pursues two aspects of the issue. First we consider general aspects, especially the asymmetric pattern of volatility of daily returns of different types of energy products. Then, we analyze the behaviour of daily returns by using traditional models of volatility that include AGARCH, TGARCH, EGARCH, and ARSV strategies, as well as a threshold asymmetric autoregressive stochastic volatility (TA-ARSV) model that we propose. The energy products considered in this analysis are probably the most relevant energy products for the economic activity of the nations and the economic relations between countries: Crude Oil (OPEC reference basket and London Brent index), Gasoline, Natural Gas, Butane, and Propane. We use spot prices and the time reference ranges from 1986–1993 to 2009 depending on the product. 相似文献
102.
José Luís Cardoso 《European Journal of the History of Economic Thought》2013,20(1):197-214
The main purpose of this survey is to present the results of a questionnaire recently sent to historians of economic thought. This questionnaire — presented in the appendix - was devised so as to provide data on the approaches and experiences of teaching the history of economic thought in a wide range of universities throughout the world. A summary of the most significant results is presented in section 2 of this survey. Section 1 provides a general introduction to the methodological context of the discussion of problems concerning the teaching of the discipline. 相似文献
103.
The first part of the argument is a reformulation of Yandle's problem and a sketch of the current apologetics of Public Choice Theory and its pitfalls. In the second part it is argued that Yandle's thesis on the connection between the social value of political economy and the size of the state displays identical flaws. An improved specification is needed to save this challenging thesis. 相似文献
104.
During the past 15 years Brazil has undergone a process of rapid modernization in its telecommunications. Starting from a chaotic situation, institutional foundations were established and an ambitious development programme carried out. A fundamental piece of this programme was a planning process that proved to be flexible and adequate to handle the social and economic disparities of the country. The policies that have emerged from the planning process were implemented and provided good economic results and satisfaction to customers. 相似文献
105.
Globalization, technological developments, and consumer concerns press farmers and food producers to enhance product innovation and to seek more efficient production and distribution structures. These changes in agrifood markets shift the relative importance of the investments by different chain partners. It may therefore be necessary to change the allocation of ownership of essential assets to induce agents to make those investments that generate the chain optimum. This article analyzes the impact of ownership structure on investments in a three-tier supply chain from an incomplete contracting perspective. Circumstances are determined in which a marketing cooperative is the unique first-best ownership structure. 相似文献
106.
This article presents the results of an empirical study that investigated coordination and control within multinational companies over six key aspects of their environmental strategy. Specifically, it first examines the level of centralization of these key issues. Second, it investigates whether there is a positive relation between three variables associated with organizational complexity and the level of centralization of the environmental issues. Statistical analyses of the data obtained from a sample of 98 North American multinationals were conducted. The study's results revealed that most companies have adopted a global environmental standard to govern their worldwide business activities that is supported by strong central controls over both environmental performance evaluation of facilities and decisions regarding the development of environmental programs. Results also revealed that there are limited links between organizational complexity and most aspects of the environmental strategy. Copyright © 2006 John Wiley & Sons, Ltd and ERP Environment. 相似文献
107.
The aim of this paper is to explore the relationship between income inequality and health in the European Union countries using new data from the European Community Household Panel (ECHP). The heterogeneity of the households has been approached using different equivalence scales. A variety of different model specifications were tried using different dependent variables such as life expectancy at birth and child mortality. The results give support to the influence of income inequality on health indicators using aggregate data and panel techniques, and show the sensitivity of the Gini index to the equivalence scale considered. 相似文献
108.
Modeling Cyclical Asymmetries in GDP: International Evidence 总被引:1,自引:0,他引:1
This paper models asymmetric behavior in GDP growth in the USA, Germany, France, and Japan. It develops smooth transition autoregressive models and interprets nonlinear dynamics in terms of cyclical asymmetries. A procedure for defining data-based, qualitative cyclical regimes from the estimated models is proposed, and generalized impulse response functions are computed to assess to what extent the response to a shock changes over different phases of the cycle. 相似文献
109.
This paper deals with the collective qualification of members of society as belonging to a certain category or group based
on a fixed attribute. Our model contains three main features: the existence of individual gradual opinions, the notion of
elitism (only the opinions of certain individuals are taken into account to delineate the reference group), and the idea of sequentiality (elites are successively created by using the previous elites’ opinions on a social decision scheme). The main results of
the paper characterize when this sequential procedure converges for some intuitive ways of aggregating individual opinions.
Finally, we analyze the role of convergence for two extra basic properties (symmetry and contractiveness) that elitist rules
should possess. 相似文献
110.
In this paper, we determine the density functions of nonsymmetrised doubly noncentral matrix variate beta type I and II distributions.
The nonsymmetrised density functions of doubly noncentral and noncentral bimatrix variate generalised beta type I and II distributions
are also obtained. 相似文献