Second‐order bias‐corrected AIC in multivariate normal linear models under non‐normality

This paper deals with a bias correction of Akaike's information criterion (AIC) for selecting variables in multivariate normal linear regression models when the true distribution of observation is an unknown non‐normal distribution. It is well known that the bias of AIC is $O(1)$ , and there are a number of the first‐order bias‐corrected AICs which improve the bias to $O(n^{-1})$ , where $n$ is the sample size. A new information criterion is proposed by slightly adjusting the first‐order bias‐corrected AIC. Although the adjustment is achieved by merely using constant coefficients, the bias of the new criterion is reduced to $O(n^{-2})$ . Then, a variance of the new criterion is also improved. Through numerical experiments, we verify that our criterion is superior to others. The Canadian Journal of Statistics 39: 126–146; 2011 © 2011 Statistical Society of Canada     

Heterosexual Marital Intention: Effects of Internalized Homophobia,Homosexual Identity,Perceived Family Support,and Disclosure Among Chinese Gay and Bisexual Men

ABSTRACT

The present study explored the factors that influence the likelihood that 217 Chinese gay/bisexual men will engage in heterosexual marriage, focusing on the Chinese cultural context, in which filial duties to marry, have children, and support one’s parents in their old age are taken seriously. Data on heterosexual marital intention (HMI) were examined in relation to demographics, internalized homophobia, homosexual identity formation (HIF), perceived family support, and disclosure. We estimated a multinomial logistic regression model for HMI. Internalized homophobia was a predictor for HMI. Lower levels of HIF and disclosure were found in gay/bisexual men who have married or who intend to marry; and the more family support gay/bisexual men perceived, the more likely they were to enter heterosexual marriages. The findings could help to better evaluate and comprehend the factors leading to heterosexual marriages involving Chinese gay/bisexual men. The social implications of this research are also discussed.     

戏剧艺术的符号学解读

"艺术是表现人类的情感的符号"任何艺术形象的构铸都是一个内在客体化,对象化的物质转化过程,都是物质形成的因素,与精神的意义的因素的结合,这必然带有符号成分,每个艺术表述,都构成特定的符号的体系.为了理解艺术作品,必须理解艺术形象,为了理解形象,必须解读符号,符号具有中介性,假定性及特征性的美学特征.     

关系：中国商业活动的基本模式探讨

以关系的西方式解读为背景,结合中国社会学学者的深入研究,对关系在中国商业活动中可能扮演的角色给予理论说明,并构造一个理解关系的框架及关系序列(guanxicontinuum)概念,进而提出一个新的关系定义。     

Data-driven smooth tests of the proportional hazards assumption

A new test of the proportional hazards assumption in the Cox model is proposed. The idea is based on Neyman’s smooth tests. The Cox model with proportional hazards (i.e. time-constant covariate effects) is embedded in a model with a smoothly time-varying covariate effect that is expressed as a combination of some basis functions (e.g., Legendre polynomials, cosines). Then the smooth test is the score test for significance of these artificial covariates. Furthermore, we apply a modification of Schwarz’s selection rule to choosing the dimension of the smooth model (the number of the basis functions). The score test is then used in the selected model. In a simulation study, we compare the proposed tests with standard tests based on the score process.     

浅论财务管理假设

分析财务管理假设构建应考虑的因素是:财务管理假设的含义与内容应服从于财务的本质;财务管理假设应和其他有关财务概念相区分;财务管理假设应考虑财务管理环境因素。建立财务管理假设的设想包括:理财主体假设、理性假设、不确定假设和有效市场假设。     

实验经济学最新发展动态述评

本文全面阐述了近年来实验经济学随着经验积累、电脑技术发展和人才的培养,在研究领域和研究方法上的新发展,并着重探讨了实验经济学目前研究的焦点问题,包括理性假定的研究、激励动机设定的可信程度、实验对象的选定与内部有效性、重复性试验与结论的可靠性、模拟与仿真、实验的现实性等问题,指出了实验经济学研究的意义、不足及其发展前景。     

人性假定的历史分析

不同的人性假定模式应置于与之相对应的历史背景下研究。对人性假定的历史分析 ,可以揭示其伦理性的工具价值 ,辩证展示人性假定的社会功能 ,以期为当代社会的人性假定提供借鉴。     

审计假设研究存在的问题及其改进

审计假设研究中存在着不同观点之间差异较大、系统性不强、研究范围的局限性较大等诸多问题,产生这些问题的原因有研究内容本身缺乏足够的说服力、审计理论研究尚不完善、研究人员自身的局限性等.审计假设应注意体系的层次性和开放性、讲求审计假设研究的目的性、加强审计理论研究并提高研究人员素质、积极采用多样化的研究方法等。     

秦可卿病因及死期臆说

秦可卿是“金陵十二钗”之一 ,是作者精心结撰刻画的主要人物。作者对她的态度是遣责、讽刺的 ,故作者先以“淫丧”让她退出小说的情节 ,后接受了评点者的建议删去了有关情节 ,但却留下了许多情节上的漏洞 ,如她的病因和死期 ,这一直是“红学”研究中的一个热点问题 ,笔者撰文略申浅见