电商技术、动态能力与小农户增收

电商技术作为数字经济催生的新业态,成为推动小农户增收的重要途径。基于陕南地区实地调研数据,使用Tobit回归模型分析电商技术对小农户增收的影响,利用条件分位数回归模型分析小农户电商技术采纳增收情况的异质性,利用中介效应模型剖析电商技术采纳促进小农户收入中的作用机制。研究结果表明：电商技术采纳对小农户增收具有显著的促进作用,这种促进作用呈波动变化;电商技术采纳能够有效缩小小农户收入的不平衡性,这种影响呈现先增后减的特征;电商技术通过提高小农户的动态能力促进其收入增加,通过提高知识获取能力、整合利用能力缩小小农户收入不均衡。在此基础上,提出通过强化地方政府对电商技术采纳的重视程度、提升小农户动态能力等举措来增加小农户收入、促进收入均衡等对策建议。     

中国城乡居民自感健康与社会分层——基于（CGSS）2008年的一项实证研究

基于中国综合社会调查（CGSS）2008年的数据,利用多元线性回归模型检验社会经济地位等客观社会分层变量和阶层意识等主观社会分层变量对居民自感健康的影响。研究表明：居民的受教育程度、个人年收入、家庭年收入等客观社会分层变量和阶层意识、自评家庭经济地位等主观社会分层变量与其自感健康水平显著相关。同时,年龄、性别、政治面貌等个体特征变量能较好地解释居民自感健康的差异。     

An Optimal Procedure for Sample Coordination Using Multiple Objective Functions and Nearest Proportional to IPPS Size Sampling Designs

The sample coordination problem involves maximization or minimization of overlap of sampling units in different/repeated surveys. Several optimal techniques using transportation theory, controlled rounding, and controlled selection have been suggested in literature to solve the sample coordination problem. In this article, using the multiple objective programming, we propose a method for sample coordination which facilitates variance estimation using the Horvitz–Thompson estimator. The proposed procedure can be applied to any two-sample surveys having identical universe and stratification. Some examples are discussed to demonstrate the utility of the proposed procedure.     

Asymptotic properties of the bootstrap unit root test statistic under possibly infinite variance

ABSTRACT

In this article, the unit root test for the AR(1) model is discussed, under the condition that the innovations of the model are in the domain of attraction of the normal law with possibly infinite variances. By using residual bootstrap with sample size m < n (n being the size of the original sample), we bootstrap the least-squares estimator of the autoregressive parameter. Under some mild assumptions, we prove that the null distribution of the unit root test statistic based on the least-square estimator of the autoregressive parameter can be approximated by using residual bootstrap.     

Borrowing strength from past data in small domain prediction by kalman filtering - a case

Point and interval estimators for small domains based exclusively on current and domain specific sample observations are generally ineffective because of inadequate sample-sizes. So, borrowing strength from sample values for analogous domains and simultaneously from all relevant past and auxiliary data is useful in deriving improved small domain statistics. Postulating for simplicity a linear regression model with a single covariate and a zero intercept but a time-specific domain-invariant slope we start with “synthetic” generalized regression predictors for the domain totals. These borrow across only domains. For further improvements a simple autoregressive model is postulated for the slope parameters. Employing Kalman filtering the previous predictors are revised to borrow supplementary strength across time. As drastic simplifying assumptions are needed in such predictions the efficacy of the procedure is examined through an empirical exercise using live data as well as simulations. The numerical findings turn out encouraging.     

序数表属性量级的双向性

属性值语素与属性域语素互相融合,是原型区别词的生成机制。序数表达属性量级具有明显的双向性：采用升序,数字越大,量级越高;采用降序,数字越大,量级越低。这在交际中常常造成含混与误解。序数表量级的双向性源于数词的中性色彩。最小正整数＂一＂在汉文化中具有无与伦比的重要地位,用来表示大量级是很自然的事情,采用降序是汉文化的优选原则。     

对绑架型抢劫行为认定为抢劫罪的思考

司法实践中经常会遇到行为人将被害人绑架后,向被害人本人索要财物或者通过被害人间接向他人索要财物的情形,关于这类案件,实践中无论是定性还是处罚都相当混乱,有的认定为抢劫罪或绑架罪一罪,也有的认定为数罪,在认定为数罪之后究竟是从一重罪处罚还是数罪并罚,又存在争议。那么如何给予绑架型抢劫行为正确的评价,如果仅从传统的构成要件比较来进行分析,并不能得出令人满意的结论。因此,可从事实行为类型化、法条关系、罪刑均衡等角度来重新反思含有绑架行为的犯罪,以期对司法实务有所裨益。     

论走出“生活悲剧”的路径

当今社会,客观文化的规模不断膨胀,力量越加雄厚,渐渐发展成一种人类难以控制与把握的力量,漠视人类的情感、压制人类的自由、打击人类的权利与尊严,造成了＂生活悲剧＂。在这种背景下,追索＂生活悲剧＂的根源,控析＂生活悲剧＂的实质,以及指出解决＂生活悲剧＂的方法,为人类的幸福生活立下正确的路标,便成为人类共同的责任。     

农村微型金融发展政策规制研究

农村微型金融发展对于推动农村经济社会发展,解决＂三农＂问题,促进我国统筹城乡建设,完善金融服务体系具有极为重要的意义。基于农村微型金融发展现状,其发展必须贯彻公益性、商业性和社会性平衡理念,不能偏离保障农民生存权、发展权的法理基础,准确定位制度设计的价值目标,完善相应的政策法律制度体系,提高从业人员的业务素质,建立健全自身的治理结构体系。     

基于因素分析的教学设计效果研究

教学设计要素包括学习目的、教学目标、教学内容、教学策略及教学方法、教学媒体和教学评价几个方面,教学设计中学习者、教师和学习内容这三个要素之间存在紧密耦合的关系。学习者在某个学习区间会实现与知识点的共振,若偏离区间,则共振会逐渐减少;当共振达到一定程度,学习区间就会发生变化,从而完成一个迭代过程,继续进入下一个迭代。因此,教学设计需要找到这个临界点和学习区间,并在这个区间范围内设计教学资源,才能最大限度地提高教学设计效果。