Variance risk premiums and the forward premium puzzle We provide new empirical evidence that world currency and U.S. stock variance risk premiums have nonredundant and significant predictive power for the appr... JM Londono,H Zhou - 《Journal of Financial Economics》 被引量: 60发表: 2017年 ...
If the survival function is different from an exponential law, the process is likely to be under the influence of personality. If, on the other hand, the distribution fits an exponential function, it is suggestive of a social feedback-based mechanism. Thus, the coefficient of variance, ...
In this paper, through the prism of refining covariance matrices, we study the mean-variance efficiency and diversification contradiction that the high concentration in a few securities in portfolio selection implicates the incompatibility of efficiency and diversification which are two corner stones of mo...
Genetic and prenatal or perinatal risk factors have been associated with ASD. Genetic heritability has been suggested to account for 37–55% of ASD variance [93,102,103]. A significantly increased incidence of ASD has been associated with several relatively well-defined X-linked conditions such as...
Antibiotic degrading bacteria can reduce the efficacy of drug treatments by providing antibiotic exposure protection to pathogens. While this has been demonstrated at the ecological timescale, it is unclear how exposure protection might alter and be affe
The results of a two-way analysis of variance demonstrated the proposed interaction effect between primed self-construal and game players' chronic regulatory focus on the game players' mood in response to negative performance. The theoretical mechanism underlying the two-way interaction is explicated ...
2). Over evolutionary time, the pygidium exhibited significantly more shape variance than the aedeagus (variance ratio test: F32, 32 = 2.28, p = 0.02), suggesting that evolutionary diversification is more rapid for the pygidium than the aedeagus. Fig. 2 Comparing male and female ...
It comments that a meta-analysis found that the mean effect size was virtually zero but that there was considerable variance between studies. It mentions that negative effects may be dependent on specific necessary preconditions such as a lack of familiarity with items in the choice assortment. It...
awhere 0 is a vector of n parameters to be estimated, e is a normally distributed experimental error with meanzero and constant variance cr. Then, 0 can be estimated using the least square method as: 那里0是n参量传染媒介将估计的, e是一个通常分布的实验性错误与meanzero和恒定的变化哥斯达黎...
If this statement refers generally to two-dimensional forms, then circular, square and triangular shapes should be identified in accordance with their apparent rather than their real sizes. 展开 关键词: Humans Psychophysiology Analysis of Variance Form Perception ...