Empirical likelihood confidence intervals for the mean of a population containing many zero values

If a population contains many zero values and the sample size is not very large, the traditional normal approximation‐based confidence intervals for the population mean may have poor coverage probabilities. This problem is substantially reduced by constructing parametric likelihood ratio intervals when an appropriate mixture model can be found. In the context of survey sampling, however, there is a general preference for making minimal assumptions about the population under study. The authors have therefore investigated the coverage properties of nonparametric empirical likelihood confidence intervals for the population mean. They show that under a variety of hypothetical populations, these intervals often outperformed parametric likelihood intervals by having more balanced coverage rates and larger lower bounds. The authors illustrate their methodology using data from the Canadian Labour Force Survey for the year 2000.     

剑溪堂刻本《书经》考述

剑溪堂刻本《书经》为近年在徽州地区发现的一种《尚书》新版本。根据其书口、版式、字体、用纸、内封面以及避讳等情况综合判断,该书刊行于明神宗万历年间,与北图藏元明间宗文书堂刻本《书集传音释六卷》同出一个版本系统。它的出现对于认识《书经》乃至整个《尚书》的流变史有其重要意义。在蔡沈集传《书经》普遍流行六册、七册线装本的情况下,三册毛装本无疑还具有较强的版本认识价值。     

高校辅导员职业的专业划分问题研究

高校辅导员是否是一种职业，该不该划分专业，划分专业的标准是什么，具体由哪些专业构成，这些问题是高校辅导员专业化问题讨论中必须回答的问题。这些问题，有的理论界已有所探讨，但存在较大分歧，有的还未引起足够的重视。本文就此谈谈我们初浅的认识。     

Les transformations de l'intégration par l'emploi: Regards croisés : France métropolitaine - île de La Réunion

Against a background of mass unemployment and the increasing precariousness of employment, the current changes in the labour market demand that we examine the previously central role of paid employment in social integration. If the individual now deprived of employment or having a temporary contract is by dint of this fact less included in society or is less secure by not having a permanent salary, is it to say that he embodies the face of the de-affiliated, of those who miss out on social benefits? Taking the example of the Reunion Island which has the highest level of unemployment and population covered by the minimum income (RMI: Revenu Minimum d'Insertion) in the country, this article endeavours to explain and understand how, in the context of a protective society and increasingly flexible employment market, new methods of social integration without and resulting from paid employment are being formed.     

东北抗日义勇军入新后对新疆社会的影响

“九·一八”事变后，东北军民组成抗日义勇军与日军进行了殊死搏斗，最后被迫退出东北，取道苏联，来到新疆。他们为稳定新疆政局、新疆军事的近代化、新疆经济文化的发展等作出了贡献，对新疆社会产生广泛影响。     

从对抗、依赖到利用的性别修辞——由女性小说的解读透视女性生存

女性文学在当代中国的发展历程由80年代的强调女性自立、男女平等等造成了新的性别困惑和压迫，到90年代的张扬性别意识、身体写作导致女性的物化，再到90年代末盛行的“小女人散文”的巧用自身优势去赢得社会认同。拟从这些具有典型意义的文本中透视女性的生存，从而给现实生活中的女性一些启示——积极利用自身优势去获得发展的机会。     

“五四”后期周建人的婚恋观——以《妇女杂志》为考察依据

周建人在五四后期在恋爱、婚姻、离婚问题上更多地注重个体的自由、价值和觉醒。他认为，真诚的恋爱本是人生的花，是精神的高尚产品；理想的配偶选择应以个人本身性质上的各种美德为标准：以爱情的有无为婚姻离合的原则。婚恋的个人自由和独立有利于种族的完善、国家的进步，也是妇女解放和冲破家族制度的重要手段。因此，其婚恋观的一个重要诉求是男女平等，呈现出对妇女解放各个问题理性而具体的思考。     

Les agriculteurs dans la fabrique d'une nouvelle agriculture

The model of development that has governed the modernization of farming in France is increasingly coming under attack. Given this, analysing the “work” that farming performs to “translate” the criticisms with which it must cope in formulating new definitions of roles is important in order to understand changes under way in this sector. The changes undergone by farming over the past eighty years are briefly presented and then the procedures and results of a survey, conducted during the mad cow disease among beef-farmers in Burgundy, are described. Light is thus shed on the diversity of the positions that farmers have adopted with regard to the future of their occupation. An interpretation is proposed of how the distribution (and interplay between) these positions might affect agriculture. - Special issue on Agriculture and food.     

Marital Conflict,Ineffective Parenting,and Children's and Adolescents' Maladjustment

Data from the 1988 National Survey on Families and Households were analyzed to examine the associations among marital conflict, ineffective parenting, and children's and adolescents' maladjustment. Parents' use of harsh discipline and low parental involvement helped explain the connection between marital conflict and children's maladjustment in children aged 2 through 11. Parent‐child conflict was measured only in families with a target teenager and also was a significant mediator. Although ineffective parenting explained part of the association between marital conflict and children's maladjustment, independent effects of marital conflict remained in families with target children aged 2 through 11 (but not for families with a teenager). With a few exceptions, this pattern of findings was consistent for mothers' and fathers' reports, for daughters and sons, for families with various ethnic backgrounds, and for families living in and out of poverty.     

Sampling Strategies for Toxic Air Contaminants

Annual concentrations of toxic air contaminants are of primary concern from the perspective of chronic human exposure assessment and risk analysis. Despite recent advances in air quality monitoring technology, resource and technical constraints often impose limitations on the availability of a sufficient number of ambient concentration measurements for performing environmental risk analysis. Therefore, sample size limitations, representativeness of data, and uncertainties in the estimated annual mean concentration must be examined before performing quantitative risk analysis. In this paper, we discuss several factors that need to be considered in designing field-sampling programs for toxic air contaminants and in verifying compliance with environmental regulations. Specifically, we examine the behavior of SO2, TSP, and CO data as surrogates for toxic air contaminants and as examples of point source, area source, and line source-dominated pollutants, respectively, from the standpoint of sampling design. We demonstrate the use of bootstrap resampling method and normal theory in estimating the annual mean concentration and its 95% confidence bounds from limited sampling data, and illustrate the application of operating characteristic (OC) curves to determine optimum sample size and other sampling strategies. We also outline a statistical procedure, based on a one-sided t-test, that utilizes the sampled concentration data for evaluating whether a sampling site is compliance with relevant ambient guideline concentrations for toxic air contaminants.