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Search Results: 1 - 10 of 20354 matches for " Roger Su "
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Spillover Effect of Chinese Cross-Listed Companies across Shanghai, Hong Kong and US Markets
Bijing Li,Ronghua Yi,Roger Su
International Journal of Economics and Finance , 2011, DOI: 10.5539/ijef.v3n6p135
Abstract: This paper assesses the spillover effect of returns of ten Chinese cross-listed equities which are traded in Shanghai, Hong Kong and US markets simultaneously. We find a strong unidirectional spillover effect from US market to Shanghai market, however, a significant two-way influence exists between Hong Kong and US markets. When we use VAR modeling to exam the same-day effect, we find evidence that the effect of same-day return occurs from the Shanghai to Hong Kong market and from the Hong Kong to US market; however, there is no such effect from the Shanghai to US market.
The Regulation Reform for New Zealand Financial Advisers
Mingwei Xu,Roger Su,Amitabh S. Dutta
International Business Research , 2011, DOI: 10.5539/ibr.v4n3p127
Abstract: The recent global financial crisis has highlighted the need to re-examine the connections between financial markets, institutions and their regulations. The New Zealand Government had passed the Financial Service Providers (Registration and Dispute Resolution) Act and the Financial Advisers Act into law in 2008. Under the new legislation regime, only AFAs (Authorised Financial Advisers) can provide wide range financial service after 1st July 2011. This article will go through the process of change and the details of new legislation of AFA; and provide the picture of New Zealand financial adviser regulation reform.
Accounting Conservatism and Disposition Effect
Ying Zhao,Roger Su,Keith Hooper
International Journal of Business and Management , 2011, DOI: 10.5539/ijbm.v6n10p94
Abstract: The current financial crisis which began in 2008 created economic disruption on a global level. This study investigates the effect of accounting conservatism on the disposition effect in the Chinese capital markets. Our research findings show accounting conservatism offsets “overestimation “and “underestimation” resulting from the disposition effect. From an accounting perspective, we find the governance role of conservatism may correct inaccurate market pricings; we believe this research provides knowledge that will assist investors and policy makers to understand accounting conservatism and make better decisions.
Proximity induced quantum anomalous Hall effect in graphene/EuO hetero-structures
Shanshan Su,Yafis Barlas,Roger K. Lake
Physics , 2015,
Abstract: In a heterostructure of graphene and the ferromagnetic insulator EuO, the Eu atoms induce proximity exchange and inter-valley interactions in the graphene layer. Constrained by the lattice symmetries, and guided by ab initio calculations, a model Hamiltonian is constructed that describes the low-energy bands. Band parameters such as proximity induced exchange splitting, spin orbit coupling, and inter-valley interaction are determined. Calculations of the Chern number identify the conditions under which the hetero-structures exhibit topologically non-trivial bands that give rise to the quantum anomalous Hall effect with a Hall conductivity of $\sigma_{xy} = 2 e^2/h$.
Coexisting Stable Equilibria in a Multiple-allele Population Genetics Model
Linlin Su,Colbert Sesanker,Roger Lui
Quantitative Biology , 2011,
Abstract: In this paper we find and classify all patterns for a single locus three- and four-allele population genetics models in continuous time. A pattern for a $k$-allele model means all coexisting locally stable equilibria with respect to the flow defined by the equations $\dot{p}_i = p_i(r_i-r), i=1,...,k,$ where $p_i, r_i$ are the frequency and marginal fitness of allele $A_i$, respectively, and $r$ is the mean fitness of the population. It is well known that for the two-allele model there are only three patterns depending on the relative fitness between the homozygotes and the heterozygote. It turns out that for the three-allele model there are 14 patterns and for the four-allele model there are 117 patterns. With the help of computer simulations, we find 2351 patterns for the five-allele model. For the six-allele model, there are more than 60,000 patterns. In addition, for each pattern of the three-allele model, we also determine the asymptotic behavior of solutions of the above system of equations as $t \to \infty$. The problem of finding patterns has been studied in the past and it is an important problem because the results can be used to predict the long-term genetic makeup of a population.
Pitfall of genome-wide association studies: Sources of inconsistency in genotypes and their effects  [PDF]
Huixiao Hong, Lei Xu, Zhenqiang Su, Jie Liu, Weigong Ge, Jie Shen, Hong Fang, Roger Perkins, Leming Shi, Weida Tong
Journal of Biomedical Science and Engineering (JBiSE) , 2012, DOI: 10.4236/jbise.2012.510069
Abstract: Personalized medicine will improve heath outcomes and patient satisfaction. However, implementing personalized medicine based on individuals’ biological information is far from simple, requiring genetic biomarkers that are mainly developed and used by the pharmaceutical companies for selecting those patients who benefit more, or have less risk of adverse drug reactions, from a particular drug. Genome-wide Association Studies (GWAS) aim to identify genetic variants across the human genome that might be utilized as genetic biomarkers for diagnosis and prognosis. During the last several years, high-density genotyping SNP arrays have facilitated GWAS that successfully identified common genetic variants associated with a variety of phenotypes. However, each of the identified genetic variants only explains a very small fraction of the underlying genetic contribution to the studied phenotypic trait. The replication studies demonstrated that only a small portion of associated loci in the initial GWAS can be replicated, even within the same populations. Given the complexity of GWAS, multiple sources of Type I (false positive) and Type II (false negative) errors exist. The inconsistency in genotypes that caused either by the genotypeing experiment or by genotype calling process is a major source of the false GWAS findings. Accurate and reproducible genotypes are paramount as inconsistency in genotypes can lead to an inflation of false associations. This article will review the sources of inconsistency in genotypes and discuss its effect in GWAS findings.
Vinylogous Mukaiyama aldol reactions with 4-oxy-2-trimethylsilyloxypyrroles: relevance to castanospermine synthesis
Hunter Roger,Rees-Jones Sophie CM,Su Hong
Beilstein Journal of Organic Chemistry , 2007, DOI: 10.1186/1860-5397-3-38
Abstract: Background The diastereoselectivity of a vinylogous Mukaiyama aldol reaction of a series of N-substituted 4-oxy-2-trimethylsilyloxypyrroles with a tartrate-based aldehyde has been explored as a model reaction for castanospermine synthesis. Results The study has revealed that the reaction is sensitive to the nature of the combination of N- and 4-oxy substituents. With a N-PMB or N-Bn and 4-methoxy combination, the reaction generates an aldol adduct with the correct absolute configurations for C-8 and C-8a of the indolizidine alkaloid castanospermine. The adduct was transformed to an indolizidine, whose ketal could not be transformed appropriately for the target alkaloid. Conclusion The first successful diastereoselective Mukaiyama aldol strategy for the C-8 and C-8a stereogenic centres of castanospermine is presented using silyloxypyrrole chemistry. The results suggest that a full enantioselective synthesis can be realized provided that C-1 functionalisation is accomplished early in the synthesis, post-coupling.
Financial Anomalies: Evidence from Chinese A-share Markets
Roger Su,Amitabh Dutta,Mingwei Xu,Jun Ma
International Journal of Economics and Finance , 2011, DOI: 10.5539/ijef.v3n2p76
Abstract: The analysis of broad samples of equal-weighted and value-weighted returns of the Chinese security markets documents that abnormally high rates of return on small-capitalization stocks are to be observed during the month of March on both Shanghai and Shenzhen A-share markets. Different to the international experience of the January effect, the March effect can be seen as the turn-of-the-year effect in the Chinese security market as the national economic background and cultural background delay the turn-of-the-year from February to March.
Why Small Business Owners Should Not Worry about“Money Left on the Table” in IPOs!
Roger Su,Keith Hooper,Amitabh S. Dutta,Ronghua Yi
International Business Research , 2011, DOI: 10.5539/ibr.v4n4p42
Abstract: Purpose – this study aims to investigate how those directors of listed companies to make profits when their firms were listed to public. Design/methodology/approach –This is an empirical study; we adopted the formula from Ritter (2001) for this research. Findings -this study finds that directors of issuing companies usually get benefits from the money left on the table due to two factors. First, they usually retain larger percentage of shares before or after the companies going public; second, the first-day closing market price is normally higher than the initial file price ranges (defined as the expected price per share by issuing companies just before the firms go public). Originality/value - the findings may be used for future academic research literatures which focus on IPO or primary market. This research would help individual investors better understanding primary market especially IPO market.
The Exact Similarity between the Positron and the Electron Equations in a P and the T Violations  [PDF]
Roger Boudet
Journal of Modern Physics (JMP) , 2012, DOI: 10.4236/jmp.2012.38101
Abstract: Using in CPT a P and T violations we show that the equation of the positron is exactly the same as the one of the electron, on the condition that both the sign of the charge and the electromagnetic potential are changed. As a consequence the velocities are both in direction to the future and the masses are both positive and, in similar experiences, the behaviours of the two particles are the same. These theoretical results are in quite agreements with the experiments of the LEP.
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