A COPULA-BASED CORRELATION MEASURE AND ITS APPLICATION IN CHINESE STOCK MARKET

2009 ◽  
Vol 08 (04) ◽  
pp. 787-801 ◽  
Author(s):  
FENGHUA WEN ◽  
ZHIFENG LIU
Keyword(s):  
Theoretical Analysis ◽  
Empirical Study ◽  
Correlation Coefficient ◽  
Geometric Analysis ◽  
Copula Function ◽  
Chinese Stock Market ◽  
Correlation Measure ◽  
Gini Correlation ◽  
New Correlation ◽  
Derivation Method

In this paper, a copula-based correlation measure is proposed to test the interdependence among stochastic variables in terms of copula function. Based on a geometric analysis of copula function, a new derivation method is introduced to derive the Gini correlation coefficient. Meantime theoretical analysis finds that the Gini correlation coefficient tends to overestimate the tail interdependence in the case of stochastic variables clustering at the tails. For this overestimation issue, a fully new correlation coefficient called Co is developed and extended to measure the tail interdependence. Empirical study shows that the new correlation coefficient Co can effectively solve the overestimation issue, which implies that the proposed new correlation coefficient is more suitable to describe the interdependence among stochastic variables than the Gini correlation coefficient.

Mоdern choreographic education: british and ukrainian experience

2020 ◽  
Vol 1(16) (2020) ◽  
pp. 7-14
Author(s):  
Natalya Bidyuk ◽  
◽  
Dmytro Bidyuk ◽  
Keyword(s):  
Great Britain ◽  
Theoretical Analysis ◽  
Empirical Study ◽  
Research Methods ◽  
Professional Training ◽  
National System ◽  
Pedagogical Analysis ◽  
British Experience ◽  
Holistic Analysis ◽  
Pedagogical Literature

The article substantiates the expediency of a holistic analysis of the problem of professional training of choreographers in the British experience and the need to extrapolate it to the plane of the national system of higher choreographic education. The purpose of the study is to identify the organizational and didactic foundations of choreographic education in the British experience and substantiate innovative ideas for its use in Ukraine. The article defines the criteria of comparison (regulatory, organizational, semantic, methodological and technological), comparative and pedagogical analysis of choreographers’ professional training in the British and Ukrainian experience, and also common and different trends. The article uses research methods: theoretical: analysis, synthesis and generalization of pedagogical literature; interpretation and comparison; scientific extrapolation; empirical: study of the British experience, observation, conversations with students and teachers in Great Britain and Ukraine. Result. Based on comparative and pedagogical analysis of professional training of choreographers in the British and Ukrainian experience revealed familiar and different trends. The criteria of comparison are determined: normative-legal, organizational, semantic, methodical and technological. Common approaches to choreographers’training are justified. On the generalization of the identified features the specific recommendations for the use of progressive ideas abroad in the Ukrainian system of choreographic education are substantiated.

scholarly journals Empirical study in finite correlation coefficient in two phase estimation

2004 ◽  
Vol 31 (10) ◽  
pp. 890-902 ◽  
Author(s):  
M. Khoshnevisan ◽  
F. Kaymarm ◽  
H.P. Singh ◽  
R. Singh ◽  
F. Smarandache
Keyword(s):  
Empirical Study ◽  
Correlation Coefficient ◽  
Phase Estimation ◽  
Two Phase ◽  
Finite Correlation

Psychological, Pedagogical and Drganizational Peculiarities of the Development of Students’ Volitional Qualities as a Factor of Success in Learning

2021 ◽  
Author(s):  
Nadiia Vientseva ◽  
◽  
Oleva Karapetrova
Keyword(s):  
Higher Education ◽  
Theoretical Analysis ◽  
Empirical Study ◽  
University Students ◽  
Education Institution ◽  
Educational Material ◽  
Academic Achievements ◽  
The Impact ◽  
The Relationship ◽  
Development Of Students

The article reports the results of the empirical study of the impact of volitional qualities development on the level of academic achievements of higher education institution students. The article gives a theoretical analysis of the main types of volitional qualities that affect the assimilation of educational material by students. There was established the level of their development and the relationship with academic achievements. The article also identifies the main psycho-pedagogical and organizational peculiarities that affect the success of mastering the knowledge by university students. The psychological and pedagogical recommendations for forming, developing and supporting the volitional sphere of students are developed.

scholarly journals An empirical study of IPO underpricing: Evidence from Chinese stock market

2014 ◽  
Vol 12 (1) ◽  
pp. 139-152 ◽  
Author(s):  
Tianxiang Xu ◽  
Yujie Zhao
Keyword(s):  
Empirical Study ◽  
Information Asymmetry ◽  
Initial Public Offerings ◽  
Initial Public Offering ◽  
Chinese Stock Market ◽  
Short Term ◽  
Ipo Underpricing ◽  
Public Offerings ◽  
Public Offering ◽  
Different Characteristics

Initial public offerings, as one of the most important activities for firms, have raising massive amount of researches. Regarding China, the stock markets are experiencing a massive level of IPO underpricing, which leads to trillions of dollars leaved on the table. This study is conducted for the question why Chinese IPO are so heavily underpriced and the determinants of IPO underpricing, also the possibility of IPO be underpriced in China. We confirm again that Chinese IPOs are heavily underpriced and the average underpricing level is about 110%. Further, Chinese IPO will experience a negative short term return starting from 10 days after listing, and there are significantly different characteristics for state owned IPOs and private IPOs. This study finds that information asymmetry, proportion of state owned share and risk are the mainly determinants of IPO underpricing in China. Additionally, one of the biggest reason that Chinese initial public offering is underpriced so much is because of government participation, since we find that firms with larger proportion of government state owned shares will be more underpriced.

Dynamics of development of hardiness as a factor in the formation of successful activity in the population future teachers – psychologists

2021 ◽  
Vol 47 (2) ◽  
pp. 89-101
Author(s):  
K.S. Dyssembekova ◽  
◽  
K.M. Nagimjanova ◽  
Keyword(s):  
Theoretical Analysis ◽  
Empirical Study ◽  
Empirical Data ◽  
Literature Analysis ◽  
Future Teachers ◽  
Model Dynamics ◽  
Main Components ◽  
The Impact

The article presents a systematic theoretical analysis of the phenomenon of «hardiness». The main components of hardiness and their relationship are described. Features of formation of successful activity in the course of students, hardiness are defined. The influence of the components of hardiness on the formation of successful activity is characterized. The results of an empirical study of the level of hardiness of future teachers – psychologists are presented. On the basis of empirical data and literature analysis, the model «Dynamics of the development of hardiness in future teachers – psychologist» is built. Attempts are made to concretize the accumulated theoretical experience about the phenomenon of hardiness and its connection with successful activity. The results of measuring the dynamics of the development of hardiness in future teachers – psychologists and the impact on the formation of their successful activities are presented.

scholarly journals Dose Correlation of Danggui and Chuanxiong Drug Pairs in the Chinese Medicine Prescription Based on the Copula Function

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Xuan Zhao ◽  
Wei Lin ◽  
Jiawei Li ◽  
Yunhui Chen ◽  
Anamica Patel ◽  
...  
Keyword(s):  
Chinese Medicine ◽  
Traditional Chinese Medicine ◽  
Correlation Coefficient ◽  
Rank Correlation ◽  
Correlation Coefficients ◽  
Copula Function ◽  
Prescription Database ◽  
Irregular Menstruation ◽  
Spearman’S Rank Correlation ◽  
Spearman’S Rank Correlation Coefficient

Dosage is essential for studying the compatibility and effectiveness of traditional Chinese medicine. Danggui and Chuanxiong are widely used in traditional Chinese medicine for ailments and treatment of various disorders. 628 traditional Chinese medicine prescriptions containing Danggui and Chuanxiong were extracted from the self-built prescription database and screened for the three groups of prescriptions, i.e., irregular menstruation, sores, and stroke. We processed and tested the dosage of Danggui and Chuanxiong and selected the optimal copula function, Gumbel copula function, from the Archimedes function family and elliptical copula function family to establish the data model. To establish the presence of a correlation between the dose of Danggui and Chuanxiong, a graph of the joint distribution function of rank correlation coefficients, Kendall’s rank correlation coefficient and Spearman’s rank correlation coefficient, was used. Our results suggest that the model using the Gumbel copula function better reflects the correlation between the dose of Danggui and Chuanxiong. For irregular menstruation, sores, and strokes, Kendall’s rank correlation coefficients were 0.6724, 0.5930, and 0.7757, respectively, and Spearman’s correlation coefficients were 0.8536, 0.7812, and 0.9285, respectively. In all three prescription groups, the dose of Danggui and Chuanxiong was positively correlated, implying that, as the dosage of one drug increases, the dosage of the other increases as well. From the perspective of data mining and mathematical statistics, the use of the copula function model to evaluate the correlation between the prescribed dosage of the two drugs was innovative and provided a new model for the scientific interpretation of the compatibility of traditional drugs. This might also serve to guide the clinical use of traditional Chinese medicine.

scholarly journals The innovative personal potential: the content of the concept and empirical study

2019 ◽  
Vol 69 ◽  
pp. 00057
Author(s):  
Valeriia Kapustina ◽  
Eugenia Bykova
Keyword(s):  
Theoretical Analysis ◽  
Empirical Study ◽  
Personality Traits ◽  
Real World ◽  
Self Esteem ◽  
State Technical ◽  
Behavioral Component ◽  
Simple Idea ◽  
Cognitive Component ◽  
New Information

The article is devoted to the theoretical analysis of an innovative personal potential as a psychological construct. Well-known definitions of an innovative personal potential have such characteristics as openness to new information and experience (cognitive component), a desire to change/willingness to create something new (motivational component), innovative activity (behavioral component) and value-semantic system (axiological component). The empirical study of an innovative personal potential of student was held in Novosibirsk State Technical University. Authors used psychological tests (KTS by D. Keirsey, TAS by S. Badner; Tests by F. Williams, the scale of self-esteem of an innovative personality traits by N.M. Lebedeva, A.N. Tatarko, “Problems of the real world” by R. Sternberg). The sample included 177 students. The correlational analysis showed that students, who consider themselves innovative persons, show interest, plays with ideas, reflects on the hidden meaning. They are tolerant to new situations, to the emergence of possible difficulties, they tend to be open, relaxed, free, mobile, trendwatching and are able to deviate from obvious and generally accepted things and develop a simple idea to make it more interesting. Also, it is found that Rational and Idealist types have more apparent characteristics of an innovative personal potential.

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