A simplified differential game model for the optimal choice of tax rate     

张荣 《重庆大学学报(英文版)》2004,3(2):69-73

IntroductionTaxisthemainsourceofthefinancialrevenueofacountry.Itdependslargelyonthegrossnationalproduction,whichisinturndeterminedtoasignificantextentbythegrowthoffirms[1-2].So,inordertoincreasetaxrevenues,thegovernmentshouldpaysufficientattentiontothechoiceoftaxrateswhichmayaffecttheeconomicbehaviorofafirm,suchasinvestmentstrategy,capitalstructureanddividendpolicy[3-5].Therefore,itisinappropriateforthegovernmenttotakesomeofthekeyeconomicvariablesofthefirmasexogenousinalongperiod.Whenselectin…  相似文献   

劳动力资源配置与二元经济及就业结构的关系     

张庆祥 《鸡西大学学报》2006,6(2):27-29

本文试图把劳动力资源的配置状况与中国经济的二元结构和二元的就业体制(国有、私人两部门经济)结合起来进行分析,利用模型来描述工资水平的变动与劳动力资源配置之间的相关关系,阐明二元的经济及就业结构对劳动力资源配置所产生的影响。  相似文献   

CS1: how will they do? How can we help? A decade of research and practice     

Keith Quille  Susan Bergin 《Computer Science Education》2019,29(2-3):254-282

ABSTRACT

Background and Context: Computer Science attrition rates (in the western world) are very concerning, with a large number of students failing to progress each year. It is well acknowledged that a significant factor of this attrition, is the students’ difficulty to master the introductory programming module, often referred to as CS1.

Objective: The objective of this article is to describe the evolution of a prediction model named PreSS (Predict Student Success) over a 13-year period (2005–2018).

Method: This article ties together, the PreSS prediction model; pilot studies; a longitudinal, multi-institutional re-validation and replication study; improvements to the model since its inception; and interventions to reduce attrition rates.

Findings: The outcome of this body of work is an end-to-end real-time web-based tool (PreSS#), which can predict student success early in an introductory programming module (CS1), with an accuracy of 71%. This tool is enhanced with interventions that were developed in conjunction with PreSS#, which improved student performance in CS1.

Implications: This work contributes significantly to the computer science education (CSEd) community and the ITiCSE 2015 working group’s call (in particular the second grand challenge), by re-validating and developing further the original PreSS model, 13 years after it was developed, on a modern, disparate, multi-institutional data set.  相似文献   

2008年奥运会拳击比赛中哈那提的数据统计及技术分析     

阿力木  陈奇 《辽宁体育科技》2010,32(5):58-60

采用平面定点摄像、录像解析和数据统计等方法,对新疆重点运动员哈那提·斯拉木在2008年奥运会69kg级比赛中的技术动作进行数据统计和比对分析,找出其战术动作上的不足之处,并提出相应的对策。  相似文献   

Factors influencing access students’ persistence in an undergraduate science programme: A South African case study     

Fred Lubben  Bette Davidowitz  Andy Buffler  Saalih Allie  Ian Scott 《International Journal of Educational Development》2010

This paper explores the reasons underlying access students’ decisions on their study programmes as they progress through their extended science degree, including the role of career aspirations in these decisions. Data from semi-structured interviews with 20 third year undergraduates show two groups according to their decision criteria. Programme-focused students are guided by an interest in the science subject and, later, by the possibilities of the study programme. Their main aim is the completion of the degree. Career-oriented students are motivated, initially, by role models and extra-curricular science activities, and subsequently by the career they see themselves pursuing after graduation. There is some indication that career orientation is linked with greater study persistence. The applicability of the Social Cognitive Career Theory is discussed, and recommendations are made for accommodating students’ career aspirations in BSc programmes.  相似文献   

利率管制、租值与民营企业融资的困境     

余浩然  高毅 《宁波广播电视大学学报》2010,8(1):28-31

本文运用新制度经济学关于价格管制以及租金分配理论,对民营企业融资中遭遇的规模歧视与所有权歧视问题给出解释。分析表明,利率管制的租金创造与银行产权国有的制度安排,使代理人的外部与内部监督机制失效,是规模歧视与所有权歧视生发的内生经济逻辑。只有建立利率的市场形成机制、坚持国有银行的股份制改革、完善内部与外部监督机制,才能减少代理人机会主义行为动机,消除民营企业融资中的规模歧视与所有权歧视,才能一定程度上缓解我国民营企业融资难问题。  相似文献   

水球射门命中率影响因素的研究     

林军  潘政彬 《体育科技》2012,33(2):68-70

运用文献资料法、现场技术统计、综合分析等方法,研究影响水球射门命中率的各种因素。以水球运动员身体机能为切入点,对射门技术动作进行分析,诠释了射门技术的主要特征,提出了提高射门命中率的力量训练方法与手段,发现速度力量和力量耐力是提高射门命中率的关键素质,情绪与自信心、意志品质与注意力等心理素质是影响射门命中率的重要因素,旨在为提高水球运动员射门命中率提供有意义的参考。  相似文献   

The effects of tuition fees on transition from high school to university in Germany     

《Economics of Education Review》2014

This paper studies whether the introduction of tuition fees at public universities in some German states had a negative effect on enrollment, i.e., on the transition of high school graduates to public universities in Germany. In contrast to recent studies, we do not find a significant effect on aggregate enrollment rates. Our study differs from previous studies in three important ways. First, we take full account of the fact that tuition fees were both introduced and abolished in the German states at different points in time. Second, we consider control variables, which are absent in previous studies but turn out to have a significant impact on the evolution of enrollment rates. Third, we allow for state-specific effects of tuition fees on enrollment rates. We conclude that there is no evidence for a general negative effect of the recent introduction of tuition fees on enrollment in Germany.  相似文献   

贵州“金圣方”生物有机肥对烟叶品质影响的研究     

端永明  徐兴阳  陈树林  李国宏  姚训才  岳绍启  杨发 《昆明师范高等专科学校学报》2013,(3):6-11

通过对贵州“金圣方”生物有机肥进行田间不同施肥量的田间小区试验,结果表明,该生物有机肥能够有效降低烟碱、总氮和蛋白质等不利于烟叶评吸质量的指标,能有效增加云南低氯、低钾烟区的钾、氯质量分数等,改善烟叶燃烧性的指标,还可改善施木克值.但是,该生物有机肥的施用量与烟叶糖质量分数呈现正相关性,不利于改善糖（碱）指标.  相似文献   

The effects of education quality on income growth and mortality decline     

Eliot A. Jamison  Dean T. Jamison  Eric A. Hanushek   《Economics of Education Review》2007,26(6):771

Previous work shows that higher levels of education quality (as measured by international student achievement tests) increase growth rates of national income. This paper begins by confirming those findings in an analysis involving more countries over more time with additional controls. We then use the panel structure of our data to assess whether the mechanism by which education quality appears to improve per capita income levels is through shifting the level of the production function (probably not), through increasing the impact of an additional year of education (probably not), or through increasing a country's rate of technological progress (very likely). Mortality rates complement income levels as indicators of national well-being, and we extend our panel models to show that improved education quality increases the rate of decline in infant mortality. In the analysis of growth, we find a stronger impact of education quality and of years of schooling in open than in closed economies.  相似文献