Lifestyle Options and Economic Strategies: Subsistence Activities in the Mississippi Delta1

Abstract "Subsistence" and "informal economy" are contrasted in their utility as sociological concepts and their ability to explain a variety of activities in two rural Mississippi Delta communities. Literature on subsistence stresses that the desired outcome of participation is not an increase in income but the social rewards of participation itself. Two underlying dimensions of participation in these activities are documented through the literature and through a confirmatory factor analysis of empirical data: life-style choice and economic strategy. These were constructed into indexes and examined individually and in combination as dependent variables using regressors at the community, household, and individual levels. Community ties were weakly associated with participation in such activities. Whites and those with higher incomes participated more in lifestyle choice oriented activities. Participation in general was statistically related to households needing less weekly income and being of larger size. Potential connections with persistent rural poverty are discussed.     

Flow shop scheduling with deteriorating jobs under dominating machines

This paper addresses no-wait or no-idle flow shop scheduling problems with deteriorating jobs, i.e., jobs whose processing times are an increasing function of their starting time. A simple linear deterioration function is assumed and some dominating relationships between machines can be satisfied. It is shown that for the problems to minimize makespan or weighted sum of completion time, polynomial algorithms still exist, although these problems are more complicated than the classical ones. When the objective is to minimize maximum lateness or maximum tardiness, the solutions of a classical version may not hold.     

国有股和法人股对公司业绩的影响--公用事业型上市公司的实证研究

公司的股份集中于少数几个大股东手中是中国公司股权结构的一个普遍特征,研究这些大股东如何凭借其持股地位影响公司业绩是中国公司股权结构研究的一个非常重要的问题.本文选取了在上交所上市的公用事业型公司1998年至2002年的平行数据进行实证研究,结果表明,法人股对公司业绩有积极影响,国有股对公司业绩的影响视具体情况而定.     

改革开放40年我国高中阶段教育政策的价值变迁

高中阶段教育是世界各国制定教育规划时共同的关注焦点,也是我国义务教育向高等教育过渡的关键节点。改革开放以来,我国高中阶段教育政策从注重单方面质、量的平行发展到兼顾质与量的统筹发展,再到回归个体本身的个性发展,从关注学生的外部属性再深化到内部属性,价值取向处在逐步演进中,由最初的社会本位取向转变为大众主义取向,紧接着体现出以人为本取向,深刻反映了时代变化与发展的诉求。     

Bayesian adjustment for unidirectional misclassification in ordinal covariates

In this paper, we study the identification of Bayesian regression models, when an ordinal covariate is subject to unidirectional misclassification. Xia and Gustafson [Bayesian regression models adjusting for unidirectional covariate misclassification. Can J Stat. 2016;44(2):198–218] obtained model identifiability for non-binary regression models, when there is a binary covariate subject to unidirectional misclassification. In the current paper, we establish the moment identifiability of regression models for misclassified ordinal covariates with more than two categories, based on forms of observable moments. Computational studies are conducted that confirm the theoretical results. We apply the method to two datasets, one from the Medical Expenditure Panel Survey (MEPS), and the other from Translational Research Investigating Underlying Disparities in Acute Myocardial infarction Patients Health Status (TRIUMPH).     

水平井中砂泥岩互层的双侧向测井响应研究

摘要：针对砂泥岩互层的复杂测井环境，采用三维有限元数值模拟方法，计算了多层介质模型的水平井双侧向测井响应。结果表明，井眼半径、泥浆电阻率和围岩（砂岩、泥岩）的电阻率及侵入半径与电阻率对水平井双侧向测井响应都有不同程度的影响。在砂泥岩地层中，井眼尺寸越大，泥浆电阻率越高，对视电阻率的影响越严重；当目的层厚大于8 m 后，视电阻率受围岩（砂岩、泥岩）影响很小，基本上反映地层的真实电阻率，并且曲线变化规律大致相同，此时可近似为三层介质模型；对于低阻侵入，侵入越深，视电阻率越偏离真实地层电阻率。     

徐家围子断陷油气运移体系及成藏模式分析

在对含油气组合特征和成藏要素配置关系综合分析基础上，根据断陷盆地发育特征以及天然气藏形成的主控因素，重点分析了地震泵对油气纵向运移的影响，建立了该区油气藏成藏模式，本区发育的油气藏类型主要有构造气藏，岩性气藏和由构造、岩性二者共同控制作用的构造—岩性气藏、地层超覆油气藏以及基岩风化壳油气藏。徐家围子断陷两期构造运动进而形成了正反转构造，为油气提供了良好的构造圈闭及纵向疏导通道。沙河子组共经历了3 次生排烃高峰，第一次由于强烈的构造活动，没有聚集成藏，后两次在其他成藏要素的配合下，最终得以聚集成藏。     

浪漫主义与后现代主义关系之分析

浪漫主义与后现代主义均为西方人文领域的重要思潮,对学术界和社会各领域均产生了深远的影响。二者的交汇点在于共同致力于对启蒙运动的批判,因而具有极大的相似之处。但是,浪漫主义与后现代主义之间存在着诸多显著差异,以故对其进行梳理具有重要的学术意义。     

中国—东盟政治合作机制研究

本文根据中国—东盟区域合作发展的政治合作机制的概念及呈现的多维特性,运用政治合作的目标分解和构成要素,对政治合作机制进行综合的结构分析。通过利益泛化(低度)、制度分化(中度)和价值固化(深度)生成的三个阶段性使命目标(和睦共享、和平共处与和谐共荣)合作过程的剖析,对中国—东盟政治合作机制建设的结构性问题进行探讨,以此助推区域政治合作机制的改进和优化。