One stage multiple comparisons of k-1 treatment mean lifetimes with the control for exponential distributions under heteroscedasticity

Abstract

In survival or reliability data analysis, it is often useful to estimate the quantiles of the lifetime distribution, such as the median time to failure. Different nonparametric methods can construct confidence intervals for the quantiles of the lifetime distributions, some of which are implemented in commonly used statistical software packages. We here investigate the performance of different interval estimation procedures under a variety of settings with different censoring schemes. Our main objectives in this paper are to (i) evaluate the performance of confidence intervals based on the transformation approach commonly used in statistical software, (ii) introduce a new density-estimation-based approach to obtain confidence intervals for survival quantiles, and (iii) compare it with the transformation approach. We provide a comprehensive comparative study and offer some useful practical recommendations based on our results. Some numerical examples are presented to illustrate the methodologies developed.     

Admissibility of Test Procedures for Linear Hypotheses in General Linear Model

This article shows that an F-test procedure is admissible for testing a linear hypothesis concerning one of the split mean vectors in a general linear model and an F-test procedure is also admissible for testing a linear hypothesis concerning another of the split mean vectors in the same model. These results are proved by showing that the critical functions of the tests are unique Bayes procedures with respect to proper prior distributions set in common for the null hypotheses and for the alternative ones, respectively.     

An Introduction to Ranking and Selection

This expository paper explains the philosophy of the indifference-zone approach and the subset-selection approach to ranking and selection procedures. It includes examples of operating characteristic curves and data applications for selection problems based on the binomial and normal distributions. A variety of different models and goals are provided with a list of references.     

Graphical Display of Means

A graphical procedure for the display of treatment means that enables one to determine the statistical significance of the observed differences is presented. It is shown that the widely used least significant difference and honestly significant difference statistics can be used to construct plots in which any two means whose uncertainty intervals do not overlap are significantly different at the assigned probability level. It is argued that these plots, because of their straightforward decision rules, are more effective than those that show the observed means with standard errors or confidence limits. Several examples of the proposed displays are included to illustrate the procedure.     

Queering Canadian Social Work Accreditation standards and procedures: a content analysis

ABSTRACT

This paper reviews and critically analyzes the Canadian Association for Social Work Education—Association Canadienne Pour La Formation En Travail Social’s (CASWE-ACFTS’) Accreditation Standards and Procedures from a Sexual Orientation Gender Identity and Expression (SOGIESC) lens to examine how such are addressed in relevant documents. The CASWE-ACFTS Queer Caucus undertook a lead role in examining ‘diversity’ in the documents as it serves as an umbrella term for SOGIESC and other intersecting positionalities. This paper iterates an initial response in the CASWE-ACFTS Queer Caucus’ ongoing consultation with the CASWE-ACFTS’s Education Policy Committee’s work on Education Policy and Accreditation Standards 2019 (EPAS2019). The content analysis of the documents reveals that SOGIESC issues are not adequately addressed and this has implications for undergraduate and graduate social work curricula in Canada. The authors provide recommendations that address the integration of SOGIESC in CASWE-ACFTS’s Accreditation Standards and Procedures documents.     

论我国福利行政的程序完善

认为福利行政的程序是灵活的、弹性的,是自由裁量的领域的观点,是对西方行政法学理论的一种误读。福利行政程序的主要内容还是刚性的程序性规定,这一部分内容才是福利行政程序的核心所在。从中国国情考虑,可以在《行政程序法》中单设行政给付程序一节。在立法内容上,应在启动程序、决定程序、听证程序、公开程序等方面进行有针对性的设计,引入依职权启动程序、简易程序和事后听证等新型程序。     

Bargaining and Reputation

The paper develops a reputation based theory of bargaining. The idea is to investigate and highlight the influence of bargaining ‘postures’ on bargaining outcomes. A complete information bargaining model a la Rubinstein is amended to accommodate ‘irrational types’ who are obstinate, and indeed for tractability assumed to be completely inflexible in their offers and demands. A strong ‘independence of procedures’ result is derived: after initial postures have been adopted, the bargaining outcome is independent of the fine details of the bargaining protocol so long as both players have the opportunity to make offers frequently. The latter analysis yields a unique continuous‐time limit with a war of attrition structure. In the continuous‐time game, equilibrium is unique, and entails delay, consequently inefficiency. The equilibrium outcome reflects the combined influence of the rates of time preference of the players and the ex ante probabilities of different irrational types. As the probability of irrationality goes to zero, delay and inefficiency disappear; furthermore, if there is a rich set of types for both agents, the limit equilibrium payoffs are inversely proportional to their rates of time preference.     

近代行业纠纷解决机制理论探微——以自贡盐业纠纷解决机制为例

在中国近代的行业纠纷解决机制中,纠纷的当事人依据国家法和行业习惯法的契合,明确了行业纠纷解决中所存在的权利义务关系,并从中找出纠纷解决的合意。行业组织在一定范围之内充当了仲裁者的角色,是行业纠纷解决的主体。在这样的一个过程当中,通过国家的立法,保障了行业纠纷解决机制程序的问题,在一定程度上使行业纠纷解决由原来的注重实质正义向注重程序正义转变,提高了纠纷解决的公信力和权威性。这对当代的行业纠纷解决提供了一个可供参考的借鉴。主要实例来自于四川自贡盐业的档案、文献,盐业纠纷的解决机制实际上在近代的中国呈现出一种解决方式多元化、行业组织与地方法院互相协作、配合和注重习惯法、解纷程序的特点,不失为近代行业纠纷解决机制较为合理的一个蓝本。