属性集容量确定的夹挤式测度模式及其推算模型

迄今，为解决多属性偏好关联决策属性集容量判断指数复杂性难题所提出的λ模糊测度模式与k-可加模糊测度模式，以及建构在它们之上的属性集容量确定的推算模型，尚存在着适用性差的技术不足。为此，以平衡容量判断的可操作性和容量推算的准确性为视角，提出了一种新容量测度模式，即关于容量判断与推算的夹挤式测度模式，并在此基础上通过引入决策者较易判断给出的容量序信息构建了相应的容量推算模型。基于数值模拟的对比分析表明：新模式不仅在应用可行性上高于k-可加模糊测度模式，而且从容量推算的准确性上看也明显优于λ模糊测度模式和k-可加模糊测度模式，因而对实际决策具有更强的适用性。     

我国亲告罪追诉模式之困境及其重构——以网络诽谤案件的证据收集问题为切入点

网络诽谤犯罪属于《刑法》规定的亲告罪类型，此类案件中被害人的证据收集能力受到较大制约，导致其面临“自诉困境”。对此问题，不论是亲告罪的选择性公诉化，还是公权力适当介入证据收集过程的处理路径均存在不足。《刑法修正案(九)》针对网络侮辱、诽谤犯罪的证据收集问题作出新规定，但是无法扩张适用于所有亲告罪类型。亲告罪的自诉困境凸显出我国对亲告罪确立的单纯自诉制追诉模式存在显著缺陷：不利于对被害人的平等保护，以及混淆告诉权和举证责任。重构亲告罪追诉模式的前提是对刑事法中的“告诉”进行重新解释，使其本质回归为诉讼条件，与证明责任“解绑”。在模式选择上，应确立混合告诉制的追诉模式，被害人提起告诉后，可以自主选择适用自诉程序还是公诉程序。     

教育主体缺失视角下农村校园欺凌成因及治理

家庭、村庄和学校是农村学生成长过程中的三个重要教育主体，三者相辅相成共同构成农村教育主体结构。农村中小学生正是在该结构中获得成长，而农村校园欺凌事件的频发和多发则与其变化相关。农村教育主体结构的变化包括三个方面：一是家庭教育主体的缺位，表现为农村家庭隔代抚育的“不过问”逻辑；二是村庄教育主体的缺位，表现为村庄交往中的村民相互“不得罪”的逻辑；三是学校主体的缺位，表现为学校管理中官僚主义的“不出事”逻辑。这些主体行为逻辑的变化，进而带来了三者之间良性互动的阻隔，包括家庭与学校勾连的中断、村庄对学生和家庭监管的缺位，以及学校对农村社会的脱嵌。治理农村校园欺凌事件，除了法制和规范进校之外，还要搭建新型的教育主体结构，形成多元化、多主体农村校园欺凌的治理格局。     

双循环新发展格局下中国双向直接投资研究

构建以国内大循环为主体、国内国际双循环相互促进的新发展格局,是对未来中国经济发展路径做出的重大战略部署,作为连接国内国际双循环的纽带,双向直接投资的发展战略和路径面临重塑和调整。研究认为,应当以推动新时代科技创新和产业升级为目标,提高双向直接投资的质量,畅通供应链和产业链; 以“一带一路”倡议为依托,通过更高水平的双向投资带动中国与沿线国家贸易水平的提高; 建设高水平自贸区和自贸港,提高对外开放标准,更高质量吸引外资,提升参与国际大循环的技术含量和自主性; 在畅通要素流动领域,建立更加完善的现代化物流体系,建设更高标准的要素流通市场体系,降低制度性交易费用,提高生产率和对高质量外资的吸引能力。     

The effectiveness of a group-based educational program on the self-efficacy and self-acceptance of menopausal women: A randomized controlled trial

This study aimed to assess the effectiveness of a group-based educational training on the self-efficacy and self-acceptance of Iranian menopausal women using the PRECEDE–PROCEED model. This Randomized Controlled Trial (RCT) was conducted on 80 menopausal women in the age range of 47–55 years residing in the northeast of Iran. The participants were divided randomly into a test group (n = 40) and a control group (n = 40). We found that designing and implementation of a group-based educational training according to the PRECEDE–PROCEED model can significantly enhance the knowledge and performance of the test group with regard to self-efficacy and self-acceptance.     

Testing equality of two normal covariance matrices with monotone missing data

Abstract

The problem of testing equality of two multivariate normal covariance matrices is considered. Assuming that the incomplete data are of monotone pattern, a quantity similar to the Likelihood Ratio Test Statistic is proposed. A satisfactory approximation to the distribution of the quantity is derived. Hypothesis testing based on the approximate distribution is outlined. The merits of the test are investigated using Monte Carlo simulation. Monte Carlo studies indicate that the test is very satisfactory even for moderately small samples. The proposed methods are illustrated using an example.     

Textbook Affordability in the Time of COVID-19

Abstract

This article provides a background of the textbook affordability problem affecting students attending United States higher education institutions, both prior to and during the 2019 novel coronavirus disease (COVID-19) pandemic, as well as potential solutions to the problem. Solutions discussed include the availability of open materials in online repositories, publisher responses like inclusive access, institutional incentive programs, and initiatives by library consortia or other statewide programs. The responses of various stakeholders to make textbooks accessible to students during the pandemic are also covered.     

The intergenerational transmission of income mobility between mothers and their young adult daughters: The mediating role of their daughters' educational attainment

This study examines whether the daughters' educational attainment mediates the intergenerational transmission of economic mobility between mothers and their young adult daughters. To create mother–daughter dyads, two data sets were combined: The National Longitudinal Survey of Youth 1979 (NLSY79) and the National Longitudinal Survey of Youth 79 for Children and Young Adults (NLSY79 CY). A total of 2,456 dyads were included for analysis. We used a mediation model to explore the relationship between mothers' income and their young adult daughters' income. Mothers' income was associated with their young adult daughters' educational attainment and income. The mediation model indicated partial mediation of the relationship between mothers' income and their young adult daughters' income via their young adult daughters' educational attainment. Addressing issues of income inequality among mothers may serve as a buffer against the low upward mobility across generations for their young adult daughters raised by low-income mothers. It is imperative to provide programs and financial assistance for mothers to bolster their income and thereby their daughters' educational attainment and income in young adulthood and therefore improve economic mobility from mothers to daughters.     

就业优先:以"公平而有质量"的教育 在民族地区阻断贫困代际传递

“发展教育脱贫一批”是在民族地区实现共同富裕的重要方针。然而在“教育改变命运”的共识之外，布迪厄认为教育一代代地维持着对社会中下阶层的不公平的“文化再生产”理论，被一些学者应用于对我国少数民族教育的研究。如在“三区三州”等民族地区，代际间的贫困传递难以阻断，因家庭文化资本弱势而造成子女求学、求职受阻，看似可用“贫困文化的再生产”予以概括，但笔者不同意直接套用西方理论认定中国存在“教育不公平”的论述。因为我国社会实际与布氏提出“学校教育再生产社会阶层结构”观点之环境不同，有多项教育政策在切实保障着少数民族通过“教育改变命运”——当前在我国民族地区实现教育公平的主要障碍，并非 “文化再生产”的结构性阻力，而在于就业环节的阶段性困难。教育公平可分为起点、过程和结果三个环节，民族地区经多年教育扶贫，“起点”入学机会和“过程”教育质量已明显改善，而作为“结果”的就业环节亟待改善。以“就业优先”方针多渠道扩大少数民族就业，可激发内生动力、促进市场融入、巩固减贫成效和精准防控返贫，是助少数民族自主掌握教育“社会阶梯”和阻断贫困代际传递的有效路径。