964 resultados para Idiosyncratic volatility


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This book addresses a number of gaps in knowledge on aid allocation and effectiveness, and provides many new and important analytical insights into aid. Among the topics covered are the interface between aid allocation and perceptions of aid effectiveness, the inter-recipient concentration of aid from non-govenment organizations, the year-on-year volatility of aid, impacts of aid on public sector fistcal aggregates, and evaluation of the country-level impacts of aid. The book is an essential companion for professionals engaged in aid policy reforms and also for scholars in the areas of development economics, international finance and economics.

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A microstructural characterisation of the family of N-methyl-N-alkylpyrrolidinium tetrafluoroborate organic salts was carried out by observation of powder surface morphologies with the aim of extending the microstructure-property correlation. Inherent difficulties limiting extensive studies of organic solids by SEM, including volatility under vacuum, charging due to electron beam irradiation, and air-sensitivity were overcome with the use of a Field Emission SEM and cryostage attachment. This technique, providing considerable improvements in image quality at low accelerating voltages, enabled direct observation of complex microstructural features in samples exhibiting high temperature plastic crystalline phases (N,N-dimethylpyrrolidinium tetrafluoroborate [P11BF4]; N-methyl-N-ethylpyrrolidinium tetrafluoroborate [P12BF4]; N-methyl-N-propylpyrrolidinium tetrafluoroborate [P13BF4]). Extensive lattice imperfections including grain boundaries, slip planes and dislocation pits were observed within particles of approximately 200 mgrm diameter. The N-methyl-N-butylpyrrolidinium tetrafluoroborate (P14BF4) sample in this series revealed columnar single crystals with high aspect ratios. The origin of plastic flow properties is discussed using single crystal and polycrystalline slip observations and a relationship proposed between defect characteristics and transport properties.

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Ionic liquids comprised of tetradecyltrihexyl- and tetrabutyl- phosphonium cations paired with chloride or sulfonyl amide anions exhibit properties that reflect strong ion association, including comparatively low viscosity as well as a degree of volatility, and hence exemplify an interesting intermediate state between true ionic and true molecular liquids.

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Ionic liquids which are (weak) Lewis bases have a number of interesting and useful properties different to those of traditional ionic liquids, including volatility and the possibility of being distillable in some cases, a base catalysis effect in others and enhancement of the acidity of dissolved acids.

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Women who experienced psychiatric disorder during adolescence reported a 5̃-fold increased risk for depressive symptoms during pregnancy and during the postnatal period. A number of other adolescent and pre-conception risk factors, such as persistent stress and hormonal volatility, were also found to be implicated in the development of perinatal depression. Four case studies of children with profound and pervasive attachment-related disturbances are presented in the portfolio in order to highlight the shortcomings of the current diagnostic criteria for reactive attachment disorder in infancy or early childhood.

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Originally developed as a statistical tool for empirical research in accounting and finance, event studies have since migrated to other disciplines as well, including economics, history, law, management, marketing, and political science. Despite the elegant simplicity of a standard event study, variations in methodology and their relative merits continue to attract attention in the literature. This paper reviews some of the fundamental topics in short-term event study methodology, with an attempt to add new perspectives to some pressing topics.

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Successfully determining competitive optimal schedules for electricity generation intimately hinges on the forecasts of loads. The nonstationarity and high volatility of loads make their accurate prediction somewhat problematic. Presence of uncertainty in data also significantly degrades accuracy of point predictions produced by deterministic load forecasting models. Therefore, operation planning utilizing these predictions will be unreliable. This paper aims at developing prediction intervals rather than producing exact point prediction. Prediction intervals are theatrically more reliable and practical than predicted values. The delta and Bayesian techniques for constructing prediction intervals for forecasted loads are implemented here. To objectively and comprehensively assess quality of constructed prediction intervals, a new index based on length and coverage probability of prediction intervals is developed. In experiments with real data, and through calculation of global statistics, it is shown that neural network point prediction performance is unreliable. In contrast, prediction intervals developed using the delta and Bayesian techniques are satisfactorily narrow, with a high coverage probability.

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Information systems are changing the way artists and consumers create, use and interact with music. Music experience has become richer and more sophisticated than simply buying and listening to music. New links between IS and music are forging unprecedented levels of creative e-collaboration, innovative music technology development, new music commerce and marketing methods, alongside with the emergence of e-music communities nurturing up-and-coming artists careers. Distinct from non-creative industries, the music industry is at the forefront of technological innovation where the ubiquitous adoption of music downloading, widespread use of personal music systems, and value chain disintermediation has shifted the focus of value delivery towards consumer control. This paper provides new insights into the effect of recent technological change on stakeholders within the music industry value chain, and of music information systems upon creative music products. The paper further explores the stakeholder perceptions of the value added or depleted from music by the technology, and examines the future expectations of information systems amidst the volatility and uncertainty of the music industry.

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This discussion paper considers corporate governance issues associated with executive compensation arrangements. An historical perspective is used to demonstrate the absence of a sound empirically-based understanding of good corporate governance practices in relation to share-based payment arrangements. The paper provides an overview of issues including the potential earnings dilution and volatility effects of the introduction of regulations affecting executive remuneration. Potential future research questions have been framed addressing each of the major issues identified in this paper. We conclude that corporate regulators should ensure they are familiar with and consider best practice models for corporate governance when developing new, or revising existing business regulation. It is proposed that further research to remedy this deficiency would enable a more accurate assessment of the impact of management on accounting regulation and the better design and implementation of regulation.

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This thesis examines how companies in Thailand coped with exchange rate volatility post Asian Financial Crisis. Findings indicate businesses quickly adjusted to the transition from a fixed to floating regime. However, Thai businesses appear to be less rigorous in their internal control of currency hedging activities. The thesis recommends strategies to overcome this risk.

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This discussion paper focuses on corporate governance issues associated with executive compensation arrangements. An historical perspective is used to demonstrate the absence of a sound empirically-based understanding of good corporate governance practices in relation to share-based payment arrangements. The paper provides an overview of issues including the potential earnings dilution and volatility effects of the introduction of regulations affecting executive remuneration. Potential research questions have been framed addressing each of the major issues identified in this paper. It is concluded that corporate regulators should ensure they are familiar with and that they consider best practice models for corporate governance when developing new or revising existing business regulation. It is proposed that further research to remedy this deficiency would enable a more accurate assessment of the impact of management on accounting regulation and the better design and implementation of regulation.

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Clozapine is a distinctive antipsychotic agent, having a unique clinical profile and an idiosyncratic safety profile. More so than with other agents, the weighting of its adverse event profile is critical, in order to counterbalance its clear clinical advantages. The safety issues with clozapine are in a number of areas, some of which are considered medical emergencies and potentially life-threatening. These include haematological (neutropenia and agranulocytosis), CNS (seizures), cardiovascular (myocarditis and cardiomyopathy), metabolic (diabetes), gastrointestinal and neuromuscular. Understanding the safety profile of clozapine allows an informed use of the agent that can maximise its clear clinical benefit and minimise the known risks.

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This thesis examines stock price behaviour on the New York Stock Exchange.  The thesis develops modelsto show that firms on the stock exchange are different with respect to volatility and changes in calender dates.  Moreover, the thesis shows that firm returns are affected differently by oil prices.

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Contractor prequalification is concerned with assessing the likelihood of contractors meeting client and project requirements. The criteria used in this assessment have been developed in a largely idiosyncratic manner to date and with little or no consultation with the contractors affected. As a result, contractors are faced with a variety of calls for information by prequalifiers, the collection of which can be quite costly. This is leading to expensive duplication of effort by contractors in providing what is often similar information but in different formats. Furthermore, previous research has shown that the benefits of the information to prequalifiers are uncertain - many prequalifiers analyse the information in only a cursory manner. What is needed is some form of cost-benefit analysis to be carried out which will establish a common set of criteria for all to use.

As a precursor to this, the research described in this paper compares the different attitudes of both prequalifiers and contractors to prequalification criteria commonly in use in the Australian building industry. This was carried out via a postal questionnaire involving 49 contractors and 15 prequalifiers across Australia. The respondents were divided into three groups; (1) contractors doing work for mainly private sector clients and (2) contractors doing work for mainly private sector clients, and (3) construction prequalifiers (clients).

The results show that both clients and contractors have divergent opinions on the importance and value of the criteria in use. The possible reasons for these differences are discussed and the likely implications for future research in the topic.

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Many modulation systems in comprehensive 2D GC (GC×GC) are based on cryogenic methods. High trapping temperatures in these systems can result in ineffective trapping of the more volatile compounds, whilst temperatures that are too low can prevent efficient remobilisation of some compounds. To better understand the trapping and release of compounds over a wide range of volatilities, we have investigated a number of different constant temperature modulator settings, and have also examined a constant temperature differential between the cryo-trap and the chromatographic oven. These investigations have led us to modify the temperature regulation capabilities of the longitudinally modulated cryogenic system (LMCS). In contrast to the current system, where the user sets a constant temperature for the cooling chamber, the user now sets the temperature difference between the cryo-trap and the chromatographic oven. In this configuration, the cooling chamber temperature increases during the chromatographic run, tracking the oven temperature ramp. This produces more efficient, volatility-dependent modulation, and increases the range of volatile compounds that can be analysed under optimal trap-and-release conditions within a single analytical run. This system also reduces cryogenic fluid consumption.