Simultaneous estimation for non-crossing multiple quantile regression with right censored data

In this paper, we consider the estimation problem of multiple conditional quantile functions with right censored survival data. To account for censoring in estimating a quantile function, weighted quantile regression (WQR) has been developed by using inverse-censoring-probability weights. However, the estimated quantile functions from the WQR often cross each other and consequently violate the basic properties of quantiles. To avoid quantile crossing, we propose non-crossing weighted multiple quantile regression (NWQR), which estimates multiple conditional quantile functions simultaneously. We further propose the adaptive sup-norm regularized NWQR (ANWQR) to perform simultaneous estimation and variable selection. The large sample properties of the NWQR and ANWQR estimators are established under certain regularity conditions. The proposed methods are evaluated through simulation studies and analysis of a real data set.     

近十五年我国中小学师生关系研究述评——基于CNKI期刊的统计分析

中小学师生关系是中国现代教育研究内容体系的重要组成部分,也是基础教育发展的重要内容.采用文献法对近十五年我国中小学师生关系学术研究发展脉络进行分析,发现我国关于中小学师生关系的理论研究与实践探索是在中国社会转型背景下随着中小学师生关系整体性发展而推进的,其发展脉络呈现出"以教师为主-以师生互动为主-以学生为主"三个鲜明的阶段性特征.在理论研究和实践探索的持续进展中,我国独具特色的中小学师生关系构建理念、方法与模式已初步形成,但也存在许多缺陷.今后应在国家中小学师生关系发展总体趋势下,采用更加科学化的方法,系统、持续地研究中小学师生关系问题,为不良师生关系问题的有效解决及和谐中小学师生关系的构建提供新的理论依据.     

Social Class in Family Therapy Education: Experiences of Low SES Students

In this article, we report the results of a national survey of students in COAMFTE‐accredited family therapy programs who self‐identify as coming from lower‐ or working‐class backgrounds. Results of the study reveal opportunity and tension relative to family, friends, and community because of social mobility associated with graduate education. Participants describe family therapy education as middle‐class centered, pointing to lack of attention to social class, marginalization, classism, and unacknowledged class barriers as salient experiences in their graduate programs. Finally, participants share a number of suggestions for program improvement.     

美国教师教育课程设置特色及启示

美国的教师教育课程设置在课程内容和课程结构上都呈现出科学性、合理性、专业性,文章借鉴美国教师教育课程设置的特色,提出我国应该改进课程目标、课程内容及结构的设定,加大教师教育的实践课程的比重,促进教师教育课程设置的完善和发展.     

Statistical Corrections of Invalid Correlation Matrices

Suppose estimates are available for correlations between pairs of variables but that the matrix of correlation estimates is not positive definite. In various applications, having a valid correlation matrix is important in connection with follow‐up analyses that might, for example, involve sampling from a valid distribution. We present new methods for adjusting the initial estimates to form a proper, that is, nonnegative definite, correlation matrix. These are based on constructing certain pseudo‐likelihood functions, formed by multiplying together exact or approximate likelihood contributions associated with the individual correlations. Such pseudo‐likelihoods may then be maximized over the range of proper correlation matrices. They may also be utilized to form pseudo‐posterior distributions for the unknown correlation matrix, by factoring in relevant prior information for the separate correlations. We illustrate our methods on two examples from a financial time series and genomic pathway analysis.     

Soviet Marxism and population policy

American demographers have maintained that Marxism, notably Soviet Marxism, is consistently pronatalist. The Soviet view is said to be that population growth is not a problem and that birth control policies in either developed or developing societies are to be rejected; the “correct” (i.e., socialist) socio‐economic structure is the true solution to alleged population problems. Such representations of Soviet thought greatly oversimplify the Soviet position as well as fail to discern the changes in Soviet thought that have been occurring. Since the 1960's Soviet writers have increasingly acknowledged that population growth is, to a considerable degree, independent of the economic base of society and that conscious population policies may be needed to either increase or decrease the rate of population growth. Even socialist societies can have population problems. And where population growth is too rapid, as in the developing countries, policies to slow such growth are needed because of the threat to economic development. However, the Soviets continue to stress that birth control policies must go hand‐in‐hand with social and economic development policies if they are to be effective.     

Teaching Note—Keeping It Real: Program Evaluation Projects for an Undergraduate Research Class

ABSTRACT

This article describes a teaching innovation that focused on the redesign of an undergraduate social work research class. Students enrolled in the redesigned class had an opportunity to conduct program evaluation projects in community agencies. The projects included (a) pretest and posttest evaluation of reminiscence approach in improving the well-being of older adults in a long-term care facility, (b) evaluation of family support services at a Head Start center, and (c) pretest and posttest evaluation of an awareness program to promote community inclusion of individuals with an intellectual disability. Steps in course development, implementation, and evaluation as well as the positive student learning outcomes are discussed. The article concludes with limitations and potential areas for further improvement.     

“It Was Like This,I Think”: Constructing an Adoption Narrative for Chinese Adopted Children

Using qualitative survey data from 35 adoptive parents of children from China, I explore the type of narrative parents construct about their child's “abandonment.” Parents tell the story they know best—the child's adoption story—being careful to not overly burden the child with harsh abandonment realities. Most parents opt to tell a dominant narrative, portraying the child's Chinese birth parents as parents who loved their child and struggled with the decision to give up their child pressured by outside forces to do so. Any counternarrative told seems to be for the adoptive parents themselves, not for their children.     

证券交易制度的目标取向及其冲突与协调

以金融市场微观结构理论为依据 ,初步探讨了证券市场交易制度设计中的目标选择及其基本含义。在此基础上 ,以市场流动性目标为基本着眼点 ,立足提高市场的长期绩效 ,分析了各个目标之间的冲突 ,提出了协调各目标的政策选择。