An upper bound on the minimal total cost of the transportation problem with varying demands and supplies

In general cases, to find the exact upper bound on the minimal total cost of the transportation problem with varying demands and supplies is an NP-hard problem. In literature, there are only two approaches with several shortcomings to solve the problem. In this paper, the problem is formulated as a bi-level programming model, and proven to be solvable in a polynomial time if the sum of the lower bounds for all the supplies is no less than the sum of the upper bounds for all the demands; and a heuristic algorithm named TPVDS-A based on genetic algorithm is developed as an efficient and robust solution method of the model. Computational experiments on benchmark and new randomly generated instances show that the TPVDS-A algorithm outperforms the two existing approaches.     

高等教育大众化背景下的自学考试实效性探讨——以学科型课程向应用型课程转变为视角

课程改革是自学考试制度改革的核心。由学科型课程体系向应用型课程体系转变,是高等教育大众化时代自学考试制度改革的内在要求。通过深化专业设置改革、课程设置改革和自学考试制度综合改革等方式,加强应用型课程体系建设,提高自学考试的实效性和吸引力。     

房价对企业技术创新产出的成本效应与投资效应研究——基于A股上市公司数据的实证分析

文章将房价对企业创新水平的影响归结为"成本效应"及"投资效应"两种影响机制，并分析了房地产价格、房产性投资行为、房产性投资的深化以及企业技术创新产出之间的关系。文章的创新之处在于，将创新要素投入和创新管理水平作为中介变量，从理论和实证两方面检验房价和创新产出的关系。基于提出的理论观点利用A股上市公司数据，对研究假设进行了实证研究，得到如下结论：房价对企业技术创新水平的影响机制至少是通过"成本效应"与"投资效应"两条渠道实现的；房价对企业技术创新水平的"成本效应"是通过技术创新投入作为中介对技术创新成果产生影响；房价对企业技术创新水平的"投资效应"是通过技术创新管理水平作为中介对技术创新成果产生影响；未能证实房产性投资会挤压上市公司技术创新投入。文章的研究结论具有以下重要政策启示意义：应当重视房地产价格对企业技术创新产出的"成本效应"。在新旧动能转换的背景下，创新人才的稀缺性提高了其在劳动力市场的议价能力，作为生活必需品的房屋价格上涨，会导致创新人才的劳动力价格随之上涨，这势必加大企业技术创新投入的负担，影响企业的转型升级和长期发展质量；A股企业的房地产投资并未挤压技术创新投入，但降低了企业创新的效率。在政策上，应当制定相关技术创新效率的考察指标，促进骨干型企业重视其创新效率的提升。     

基于消费者显著性偏好的双边平台转换成本和定价策略研究

针对消费者对转换成本和价格属性具有显著性偏好的实际情况，基于显著性理论对垄断双边平台企业的转换成本和定价策略问题进行了研究。研究发现：1)在显著性偏好非对称型市场上，对价格敏感的一方收取的价格最低，对高转换成本的一方收取的价格最高，而在显著性偏好对称型市场上，平台的最优价格位于非对称型市场之间，但是对价格敏感型市场收取的价格低于转换成本敏感型市场的价格。2)在高转换成本的市场，平台利润最低；低转换成本市场平台利润最高，而混合型情况的最优利润位于这两者之间。该研究结论说明平台企业应该采取措施来降低用户加入平台的转换成本，从而增加利润，这与现实的案例研究结论相吻合。     

A Study of Clinical Change in Individual Career Counseling

This study examined the clinical significance of career counseling effects. Participants were 111 university students (83% women) who participated in individual career counseling sessions at their university. All participants completed the French version of the Outcome Questionnaire–30.2 (OQ‐30.2; Lambert, Finch, Okiishi, & Burlingame, 2005) immediately before the 1st session (pretest) and at the beginning of the last session (posttest). The OQ‐30.2 assesses 3 client life domains: subjective discomfort, problems in interpersonal relationships, and problems in social role satisfaction. Using Jacobson and Truax’s (1991) statistical approach to assessing clinical change, the authors compared clients’ pretest OQ‐30.2 scores with their posttest scores. Among clients with a “dysfunctional” score (n = 59) at the study’s inception, 34% recovered and 14% improved, whereas 41% of clients with functional scores (n = 52) at the study’s inception improved. The results suggest that individual career counseling can make a difference in the lives of many clients; they also highlight the importance of further outcome research that accounts for possible variability in clients’ responses to career counseling.     

Educational gradient of health in rural China

The aim of this paper is to examine whether and how rural residents’ educational attainment is associated with their self-rated health in China. Taking advantage of the National Exercise Facility Survey that was collected between December 2015 and March 2016, we find that educational attainment has a significant and positive correlation with self-rated health, net of the effects of age, gender, and geographical region. This correlation is mediated by factors such as perceived importance of exercise and healthy lifestyle. Relatively, people’s cognitive knowledge about health-related information and material resource access fail to play a significant mediating role. The findings highlight the non-material and non-cognitive attributes of educational attainment in shaping the gradient of health in the rural setting of China. Interventions that expand formal education to the mass and optimize teaching contents may offer an effective means to balance the health gradient.     

幼儿园实际教育成本的模型构建与核算——以佛山某幼儿园为例

在界定幼儿园实际教育成本含义的基础上，确认其成本项目包含人员支出、公用支出、固定资产折旧和土地使用成本，以此为基础构建了幼儿园实际教育成本计量模型，并以佛山市某幼儿园为例核算出该幼儿园的实际教育成本。通过该园实际教育成本与标准教育成本的比较，发现该幼儿园教育经费投入不足且投入结构不合理，将来应重点增加人员投入。     

借助新媒体提升“90后”大学生思想政治教育的实效性

在经济全球化、思想文化多元化、信息化和科学技术飞速发展、我国综合国力和国际竞争力不断增强的背景下,新媒体已渗透到人们日常生活的方方面面。＂90后＂大学生呈现出独特的思想、行为模式,给大学生思想政治教育工作带来挑战。因此,认清和把握＂90后＂大学生的思想、行为特点,充分借助新媒体的优势,有针对性地开展大学生思想政治教育工作,提升思想政治教育工作的实效性显得尤为重要。     

解决信访问题的有效性对策——基于对H市信访问题特点的分析

信访问题能够反映不同时期、不同治理状态下的政府行为对相对人的影响，信访问题呈现的新特点能凸显公民的利益诉求方向，解决信访问题的有效性对策正是要解决根源性问题，加强源头治理，规范政府行为，强化各级政府社会管理的主体意识、担当意识和责任意识；健全信访制度体系，推进建立信访预警研判机制。