中国现阶段环境约束下的适度经济增长率研究——基于废气排放量视角的分析

经济发展与环境污染的关系历来都是一对不可回避的矛盾,也是学术界研究的热点,国内外大多数学者都在考察人均GDP与环境污染的库兹涅茨曲线,但对于环境与经济增长率的关系却很少有人研究。首先建立环境变量与经济增长率关系的变参数状态空间模型,并将建立的状态空间模型转化成线性规划中的决策方程,之后应用参数区间估计和集合论两种方法,通过约束相应的变量及变量的系数来估计中国现阶段环境约束下的适度经济增长率。     

An omnibus lack of fit test in logistic regression with sparse data

The usefulness of logistic regression depends to a great extent on the correct specification of the relation between a binary response and characteristics of the unit on which the response is recoded. Currently used methods for testing for misspecification (lack of fit) of a proposed logistic regression model do not perform well when a data set contains almost as many distinct covariate vectors as experimental units, a condition referred to as sparsity. A new algorithm for grouping sparse data to create pseudo replicates and using them to test for lack of fit is developed. A simulation study illustrates settings in which the new test is superior to existing ones. Analysis of a dataset consisting of the ages of menarche of Warsaw girls is also used to compare the new and existing lack of fit tests.     

The finite-time ruin probability in two non-standard renewal risk models with constant interest rate and dependent subexponential claims

This paper considers an ordinary renewal risk model and a compound renewal risk model with constant interest rate, subexponential claims and a general premium process. We derive some asymptotic results on the finite-time ruin probabilities.     

De-aliasing effects using semifoldover techniques

Semifoldover designs, obtained by semifolding a regular two-level factorial design, have been discussed recently in the literature. In this article, with the use of indicator functions, we investigate various semifoldover designs that are obtained from a general two-level factorial design. We discuss when a main factor or a two-factor interaction can be de-aliased from their aliased two-factor interactions, and extend some of the existing results from regular designs to non-regular designs. Finally, we present some examples to illustrate the results developed here.     

Inference for general parametric functions in box‐Cox‐type transformation models

The authors propose a simple but general method of inference for a parametric function of the Box‐Cox‐type transformation model. Their approach is built upon the classical normal theory but takes parameter estimation into account. It quickly leads to test statistics and confidence intervals for a linear combination of scaled or unsealed regression coefficients, as well as for the survivor function and marginal effects on the median or other quantité functions of an original response. The authors show through simulations that the finite‐sample performance of their method is often superior to the delta method, and that their approach is robust to mild departures from normality of error distributions. They illustrate their approach with a numerical example.     

西藏民营企业融资问题研究

民营企业为西藏自治区贡献了40%以上的GDP,80%以上的城镇劳动就业,90%以上的税收,是西藏经济社会发展中最活跃的经济增长点和重要组成部分,为促进西藏经济社会高质量发展发挥了重要作用。近年来,西藏民营企业发展面临着融资难、融资少、融资慢等突出问题。本文对西藏3万户民营企业融资情况进行问卷调查,经研究发现,西藏民营企业整体信贷需求率偏低,其中有效信贷需求的满足率较高,潜在信贷需求的满足率较低。笔者认为,下一步要通过提高金融机构融资供给水平,优化民营企业融资环境,加强民营企业自身发展培育等一系列举措,充分挖掘西藏民营企业的潜在信贷需求,使其转化为有效信贷需求,进而提高民营企业整体信贷满足率,促进西藏民营企业发展壮大。     

Long maternal working hours were linked to obesity,underweight and stunting in children under age 5 in China

This study assessed the relationship between maternal working hours and stunting, underweight and obesity in children under age 5 in China, using data from the China Nutrition and Health Survey (CNHS) conducted in 2002 and multivariable logistic regression. We found that maternal work hours 25–40 or >40 h per week were associated with a higher risk for underweight and stunting (under growth) in children under age 5. The association between working 25–40 h per week and stunting was somewhat stronger for children from low-income families and the effect of working >40 h per week on underweight was larger among children from mothers with lower education, although with marginal significance (90% confidence). In contrast, we found that long maternal work hours (>40 h per week) were associated with a lower risk for overweight and obesity in children under age 5. This association was stronger among children from mothers with lower education.     

论高校实施创业教育的方法和途径

创业是解决大学生就业问题的重要途径之一,创业教育是当前大学生就业教育必不可少的一个环节,应当引起足够的重视.充分了解高校创业教育的现状,构建和完善创业教育的内容体系,认真探索实施创业教育的方法和途径将成为当前高校就业教育亟待研究和解决的问题.     

理想女性与女性理想之间：高校高学历女教师角色压力及疏解

作为“传统的现代女人”。高校高学历女教师有着强烈的自我发展需求、主体意识和成就动机,但在沉重的学术压力面前,她们更容易出现职业倦怠;作为“现代的传统女人”,未婚的高学历女教师往往面临“结构性剩余”的境况,已婚的高学历女教师则在事业与家庭之间作着“鱼与熊掌”的艰难选择。多种角色压力归根到底是由于传统社会期待与现代价值追求的冲突,要疏解这些压力需要全社会共同努力,推进社会性别文化的良性发展,高学历女教师自身也要对自我作理性认知,提高对不同角色的适应能力。