John Paul Broussard and Roger Koppl
Outlines previous research attempts to explain the behaviour of second moments of price and return distributions and theories of how Big Players (i.e. those with enough…
Abstract
Outlines previous research attempts to explain the behaviour of second moments of price and return distributions and theories of how Big Players (i.e. those with enough discretionary power to influence the market but little sensitivity to profit/loss consequences) affect the volatility and informational efficiency of markets. Contrasts the 1883‐1892 fluctuations in the exchange value of the Russian rouble under interventionist (i.e. big player) and non‐interventionist finance ministers; and analyses the statistics using GARCH techniques. Shows that under the Big Player, both unconditional variance and the persistence of conditional volatility increased. Suggests that policy regimes affect the degree of noise‐trader influence and calls for further research.
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Modelling of a Twin ridge waveguide optical Amplifier is reported here. In this paper appropriate physical mechanism such as current spreading, carrier diffusion, waveguiding and switching etc. have been take into consideration and the effects on characteristics and performance as a switch were investigated. With this model, physical phenomenon appropriate to the device can be analysed with respect to electrical, optical and geometrical parameters. Mixture of analytical and numerical techniques were employed.
Gas permeability through damage networks in composite laminates is the key issue for the applicability of high‐performance composites to the cryogenic propellant tanks of space…
Abstract
Gas permeability through damage networks in composite laminates is the key issue for the applicability of high‐performance composites to the cryogenic propellant tanks of space launch vehicles. A simple model for the gas permeability induced by multilayer matrix cracks in composite laminates is proposed based on the leak conductance at crack intersections, which is an extension of the model by Kumazawa et al (AIAA J. 41, 2037‐ ‐2044, 2003). Experimental evidence on the gas permeability mechanisms is summarized and reflected in the present model. In order to include the effects of applied loadings and damage sizes on the gas permeability, the leak conductance is assumed to be a function of the average crack opening displacements of the matrix cracks and the crack intersection angles. The leak conductance factor was empirically obtained as a function of the crack intersection angle, and the comparison of the gas permeability between the predictions based on the developed model and the experimental results is presented for the validity of this model.
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Vendors who are implementing the Standard Network Interconnection (SNI) protocols for computer to computer communications can now test their implementation against the LSP/SNI…
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Vendors who are implementing the Standard Network Interconnection (SNI) protocols for computer to computer communications can now test their implementation against the LSP/SNI Test Facility, which has been developed by the Library of Congress. The facility is intended to verify the correct functioning of the SNI protocols for the Open System Interconnection (OSI) layers. The development and use of the Test Facility are discussed.
A FUNDAMENTAL method of determining the distribution of lift across the span of, e.g., a monoplane wing is that of Graphical Successive Approximation, proposed originally in 1923…
Abstract
A FUNDAMENTAL method of determining the distribution of lift across the span of, e.g., a monoplane wing is that of Graphical Successive Approximation, proposed originally in 1923 by A. Fage and B. N. Jurieff independently.
David A. Hales and Mark C Goniwiecha
The purpose of this article is to help acquaint librarians with some of the major resources that are available regarding the Alaska Native Claims Settlement Act and the National…
Discrimination law has evolved from litigating or prosecuting overt, individual cases of egregious behavior solely by means of anecdotal evidence and eyewitness testimony…
Abstract
Discrimination law has evolved from litigating or prosecuting overt, individual cases of egregious behavior solely by means of anecdotal evidence and eyewitness testimony. Statistical evidence came to bear the imprimatur of the United States Supreme Court in the Seventies as a probative means of discerning guilt or liability, and has been used to shore up patterns of prejudice at a systemic level since. Courtrooms of the Twenty-First Century have struggled to define discrimination through a quantitative lens, nonetheless relying on qualitative evidence to assist the factfinder in rendering a verdict. Some definitions carry more precision and accuracy than others. Consider the inflammatory National Law Journal's indictment of the United States Environmental Protection Agency (‘EPA’) as an example of the latter. In 1992, the National Law Journal ran a Special Investigation of the EPA, claiming that the federal government had fostered a racist imbalance in hazardous site cleanup and its pursuit of polluters. Kudos to the columnists for bringing environmental equity into the spotlight of public debate and for forewarning and encouraging the EPA to conduct its enforcements reflectively, in order to avoid being on the receiving end of a Title VI lawsuit. Nonetheless, the methodology used by the National Law Journal belies a total understanding of the bureaucratic structure that pursued these actions and of the notion of statistical significance. This Article confines itself to Region X's actions between 1995 and 1999, applying linear regression and other statistical tests to determine whether biases, found using the National Law Journal's naive methodology, stand after due consideration of chance. The NLJ approach finds evidence of bias, but the author also conducts more complicated and appropriate analyses, such as those contemplated by the National Guidance. After issuing some provisos, the author dismisses charges of racism or classism. While the National Guidance represents a positive first step in identifying environmental justice communities, those with an above-average proportion of lower-class or non-Caucasian inhabitants, it lacks statistical sophistication and econometric depth. This Article concludes by recommending the use of normalized racial distributions, Gini coefficients, and Social Welfare Functions to the EPA and to other organizations conducting environmental justice analysis.
Ray Sastri, Fanglin Li, Arbi Setiyawan and Anugerah Karta Monika
The tourism multiplier effect (TME) is the total economic impact of tourism demand, representing the linkages between tourism and other businesses in an area. However, study about…
Abstract
Purpose
The tourism multiplier effect (TME) is the total economic impact of tourism demand, representing the linkages between tourism and other businesses in an area. However, study about it is limited in Indonesia, especially at the provincial level and after the COVID-19 crisis. This study aims to estimate the TME in all provinces of Indonesia, test its differences in priority and non-priority areas before and after the COVID-19 crisis, analyze its spatial distribution and examine the determinant factor of TME
Design/methodology/approach
This study applies an input-output model to measure the TME of all provinces in Indonesia, an independent sample t-test to examine the similarity of TME in priority and nonpriority areas, a paired sample t-test to examine the similarity of it before and after the COVID-19 crisis, and spatial analysis to check its spatial relationship.
Findings
The result shows that regional TME ranges from 1.25 to 2.05 in 2019, which changed slightly over time. The empirical result shows the TME difference before and after the COVID-19 crisis, and there is a spatial correlation in terms of TME with the hot spots are clustered in the eastern region of Indonesia, However, there was a slight change in the position of hot spots during the COVID-19 crisis. Moreover, the spatial model shows that value-added and employment in agriculture, manufacturing, trade and transportation affect the size of TME.
Originality/value
This study contributes to the academic literature by providing the first estimate of the TME at the provincial level in Indonesia, comparing the it in priority and non-priority areas before and after the COVID-19 crisis, and mapping its spatial distribution.