Evidence of Uniform Inefficiency in Market Portfolios Based on Dominance Tests

2021 ◽  
Author(s):  
Sofia Anyfantaki ◽  
Esfandiar Essie Maasoumi ◽  
Jue Ren ◽  
Nikolas Topaloglou
Keyword(s):  
Dominance Tests

scholarly journals GENETIC ANALYSIS OF THE CENTROMERIC HETEROCHROMATIN OF CHROMOSOME 2 OF DROSOPHILA MELANOGASTER: DEFICIENCY MAPPING OF EMS-INDUCED LETHAL COMPLEMENTATION GROUPS

Genetics ◽  
1976 ◽  
Vol 83 (4) ◽  
pp. 765-782
Author(s):  
Arthur J Hilliker
Keyword(s):  
Drosophila Melanogaster ◽  
Present Report ◽  
Heterochromatic Region ◽  
Centromeric Heterochromatin ◽  
Genetic Constitution ◽  
Genetic Dissection ◽  
Chromosome 2 ◽  
Multiple Alleles ◽  
Products Analysis ◽  
Dominance Tests

ABSTRACT Until recently, little was known of the genetic constitution of the heterochromatic segments of the major autosomes of Drosophila melanogaster. Our previous report described the genetic dissection of the proximal, heterochromatic region of chromosome 2 of Drosophila melanogasterby means of a series of overlapping deficiencies generated by the detachment of compound second autosomes (Hilliker and Holm 1975). Analysis of these deficiencies by inter se complementation, pseudo-dominance tests with proximal mutations and allelism tests with known deficiencies provided evidence for the existence of at least two loci between the centromere and the light locus in 2L and one locus in 2R between the rolled locus and the centromere. These data in conjunction with cytological observations demonstrated that light and rolled and three loci lying between them are located within the proximal heterochromatin of the second chromosome.——The present report describes the further analysis of this region through the induction with ethyl methanesulphonate (EMS) of recessive lethals allelic to the 2L and 2R proximal deficiencies associated with the detachment products. Analysis of the 118 EMS-induced recessive lethals and visible mutations recovered provided evidence for seven loci in the 2L heterochromatin and six loci in the 2R heterochromatin, with multiple alleles being obtained for most sites. Of these loci, one in 2L and two in 2R fall near the heterochromatic-euchromatic junctions of 2L and 2R respectively. None of the 113 EMS lethals behaved as a deficiency, implying that the heterochromatic loci uncovered in this study represent nonrepetitive cistrons. Thus functional genetic loci are found in heterochromatin, albeit at a very low density relative to euchromatin.

scholarly journals Glucose Transporter Mutants of Escherichia coli K-12 with Changes in Substrate Recognition of IICBGlc and Induction Behavior of theptsG Gene

2000 ◽  
Vol 182 (16) ◽  
pp. 4443-4452 ◽  
Author(s):  
Tim Zeppenfeld ◽  
Christina Larisch ◽  
Joseph W. Lengeler ◽  
Knut Jahreis
Keyword(s):  
Escherichia Coli ◽  
Glucose Transporter ◽  
Regulatory Mechanism ◽  
Single Copy ◽  
Amino Acid Residues ◽  
Inducer Exclusion ◽  
Membrane Bound ◽  
Dominance Tests ◽  
K 12 ◽  
Enzyme I

ABSTRACT In Escherichia coli K-12, the major glucose transporter with a central role in carbon catabolite repression and in inducer exclusion is the phosphoenolpyruvate-dependent glucose:phosphotransferase system (PTS). Its membrane-bound subunit, IICBGlc, is encoded by the gene ptsG; its soluble domain, IIAGlc, is encoded by crr, which is a member of the pts operon. The system is inducible by d-glucose and, to a lesser degree, byl-sorbose. The regulation of ptsG transcription was analyzed by testing the induction of IICBGlctransporter activity and of a single-copy Φ(ptsGop-lacZ) fusion. Among mutations found to affect directly ptsGexpression were those altering the activity of adenylate cyclase (cyaA), the repressor DgsA (dgsA; also called Mlc), the general PTS proteins enzyme I (ptsI) and histidine carrier protein HPr (ptsH), and the IIAGlc and IIBGlc domains, as well as several authentic and newly isolated UmgC mutations. The latter, originally thought to map in the repressor gene umgC outside theptsG locus, were found to represent ptsGalleles. These affected invariably the substrate specificity of the IICBGlc domain, thus allowing efficient transport and phosphorylation of substrates normally transported very poorly or not at all by this PTS. Simultaneously, all of these substrates became inducers for ptsG. From the analysis of the mutants, fromcis-trans dominance tests, and from the identification of the amino acid residues mutated in the UmgC mutants, a new regulatory mechanism involved in ptsG induction is postulated. According to this model, the phosphorylation state of IIBGlc modulates IICGlc which, directly or indirectly, controls the repressor DgsA and hence ptsGexpression. By the same mechanism, glucose uptake and phosphorylation also control the expression of the pts operon and probably of all operons controlled by the repressor DgsA.

scholarly journals Testing for Stochastic Dominance up to a Common Relative Poverty Line

Econometrics ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 5
Author(s):  
Tahsin Mehdi
Keyword(s):  
Stochastic Dominance ◽  
Household Survey ◽  
Monte Carlo Study ◽  
Poverty Line ◽  
Poverty Measurement ◽  
Superior Performance ◽  
Relative Poverty ◽  
Income Distributions ◽  
Household Survey Data ◽  
Dominance Tests

Although a wide array of stochastic dominance tests exist for poverty measurement and identification, they assume the income distributions have independent poverty lines or a common absolute (fixed) poverty line. We propose a stochastic dominance test for comparing income distributions up to a common relative poverty line (i.e., some fraction of the pooled median). A Monte Carlo study demonstrates its superior performance over existing methods in terms of power. The test is then applied to some Canadian household survey data for illustration.

Correlations of Sighting-Eye Dominance Tests and Comparison of Combined Scores in Classroom, Clinic, and Ophthalmological Populations

1977 ◽  
Vol 45 (3_suppl) ◽  
pp. 1259-1263 ◽  
Author(s):  
Lyelle L. Palmer
Keyword(s):  
Strong Influence ◽  
Single Test ◽  
Eye Dominance ◽  
Combined Test ◽  
Dominance Tests ◽  
Score Distributions

Contingency coefficients for near- and far-point binocular and monocular sighting tests determined from data of 240 classroom children in Grades 4, 8, and 12 were significant. Also significant differences were noted for distributions of sighting tests combined two at a time (correlated) when compared with distributions of responses on a single test. Comparison of combined test distributions for classroom and clinic populations yielded significant differences in near-point sighting and between near- and far-point tests. Comparison with the ophthalmological data of Fink confirmed the validity of the findings. All simple and combined score distributions deviated from normalcy. Near-point binocular sighting exerts a strong influence on combined score distributions because more mixed-eyedness is indicated by that test.

Eye Dominance in a Reading Clinic Population

1976 ◽  
Vol 42 (3) ◽  
pp. 712-714 ◽  
Author(s):  
Lyelle L. Palmer
Keyword(s):  
Eye Dominance ◽  
Reading Clinic ◽  
Dominance Tests ◽  
Clinic Population

Eye dominance tests (24 comparisons) varied markedly in agreement with each other for 225 consecutive screening evaluations (5 yr. to 55 yr.) in a reading clinic.

scholarly journals Assessing Deprivation with an Ordinal Variable: Theory and Application to Sanitation Deprivation in Bangladesh

2020 ◽  
Author(s):  
Suman Seth ◽  
Gaston Yalonetzky
Keyword(s):  
Stochastic Dominance ◽  
Poverty Alleviation ◽  
Poverty Measurement ◽  
Variable Theory ◽  
The Past ◽  
The Poor ◽  
Ordinal Variable ◽  
Poverty Measures ◽  
Dominance Tests ◽  
Empirical Illustration

Abstract The challenges associated with poverty measurement using a cardinal variable have received much attention over the past four decades, but there is a dearth of literature on how to meaningfully assess poverty with an ordinal variable. This article proposes a class of simple, intuitive, and policy-relevant poverty measures for ordinal variables. The measures are sensitive to the depth of deprivations, unlike the headcount ratio. Moreover, under appropriate restrictions, the measures ensure that priority is given to the poorest among the poor when targeting, monitoring, and evaluating poverty alleviation programs. To assess the robustness of poverty comparisons to alternative choices of parameters, the article develops various stochastic dominance tests (some of which are novel contributions to the stochastic dominance literature). The empirical illustration documenting changes in sanitation deprivation in Bangladesh showcases the measures’ ability to identify instances in which overall sanitation deprivation improved while leaving the poorest behind.

scholarly journals Forecasting Multivariate Volatility using the VARFIMA Model on Realized Covariance Cholesky Factors

2011 ◽  
Vol 231 (1) ◽  
Author(s):  
Roxana Halbleib ◽  
Valeri Voev
Keyword(s):  
Evaluation Criteria ◽  
Forecast Accuracy ◽  
Realized Volatility ◽  
Covariance Matrices ◽  
Risk Averse ◽  
Return Distribution ◽  
Volatility Model ◽  
Realized Covariance ◽  
Dominance Tests ◽  
Multivariate Volatility

SummaryThis paper analyzes the forecast accuracy of the multivariate realized volatility model introduced by Chiriac and Voev (2010), subject to different degrees of model parametrization and economic evaluation criteria. Bymodelling the Cholesky factors of the covariance matrices, the model generates positive definite, but biased covariance forecasts. In this paper, we provide empirical evidence that parsimonious versions of the model generate the best covariance forecasts in the absence of bias correction. Moreover, we show by means of stochastic dominance tests that any risk averse investor, regardless of the type of utility function or return distribution, would be better-off from using this model than from using some standard approaches.

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