Formal education,mismatch and wages after transition: Assessing the impact of unobserved heterogeneity using matching estimators

This paper studies the incidence and consequences of the mismatch between formal education and the educational requirements of jobs in Estonia during the years 1997–2003. We find large wage penalties associated with the phenomenon of educational mismatch. Moreover, the incidence and wage penalty of mismatches increase with age. This suggests that structural educational mismatches can occur after fast transition periods. Our results are robust for various methodologies, and more importantly regarding departures from the exogeneity assumptions inherent in the matching estimators used in our analysis.     

带有扰动项的拟线性椭圆方程正解的存在性

在H0^1,k（Ω）空间中研究了一类带有扰动项的耘线性椭圆方程问题正解的存在性．利用变分原理和一种山路引理的变形,证明了当h（x,u）满足一定条件并且f（x,u）是拟线性时,其正解在H0^1,k（Ω）空间中是存在的．     

The economic value of higher teacher quality

Most analyses of teacher quality end without any assessment of the economic value of altered teacher quality. This paper combines information about teacher effectiveness with the economic impact of higher achievement. It begins with an overview of what is known about the relationship between teacher quality and student achievement. This provides the basis for consideration of the derived demand for teachers that comes from their impact on economic outcomes. Alternative valuation methods are based on the impact of increased achievement on individual earnings and on the impact of low teacher effectiveness on economic growth through aggregate achievement. A teacher one standard deviation above the mean effectiveness annually generates marginal gains of over $400,000 in present value of student future earnings with a class size of 20 and proportionately higher with larger class sizes. Alternatively, replacing the bottom 5-8 percent of teachers with average teachers could move the U.S. near the top of international math and science rankings with a present value of $100 trillion.     

Intergenerational conflict and public education expenditure when there is co-residence between the elderly and young

The main objective of this paper is to show that a family arrangement in which the elderly co-reside with the young determines that the elderly support the public education expenditure. Considering that this type of family arrangement is more common in Latin American countries than in the United States, our study is concentrated in Brazil. This study is based on a panel of 2054 Brazilian municipalities using data from the 1991 and 2000 censuses.     

School quality, child wellbeing and parents’ satisfaction

Child wellbeing at school and enjoyment of the learning environment are important economic outcomes, in particular because a growing body of research shows they are strongly linked to later educational attainments and labour market success. However, the standard working assumption in the economics of education is that parents choose schools on the basis of test-score performance, and concerns about child happiness are largely ignored. In this paper, we address this omission and investigate to what extent parents’ and children's views of their school are linked to test-score based performance, and to what extent parents’ judgements of school quality are linked to their child's happiness. To do so, we use information on stated attitudes from the Longitudinal Survey of Young People in England (LSYPE) matched to administrative records on pupil achievements in England. Our results suggest that test-score based measures of school quality tend to dominate parental satisfaction with the learning environment. However, school quality along this dimension is not strongly associated with pupil happiness and wellbeing at school.     

宇宙质量密度与减速参量q0

通过对标准宇宙结构质量密度分析,讨论了宇宙质量密度对减速参量q0以及减速参量对确定宇宙学年龄、宇宙结构——是有限封闭的还是无限开放的的影响。     

基于ARM与CAN总线的多路温度采集系统设计

以嵌入式处理器ARM7为核心,结合CAN总线通信技术,设计了一套多路温度采集系统.系统实时检测CAN总线传过来的控制信息,根据控制信息进行多路温度采集,然后通过CAN总线将采集到的温度信号远传至总控制器.给出了系统的硬件组成与程序流程.实验表明,本系统采集温度精确、可靠性高,而且通信距离远,可广泛应用于各种工业控制场合.     

居民对H7N9型禽流感认知与应对的现状及对策思考——基于政府危机管理模式

综述我国居民对H7N9型禽流感认知与应对现状以及政府干预现状,分析其存在的不足,做出提高我国居民对H7N9型禽流感认知与应对能力和政府干预水平的对策思考,即"三位一体"模式普及居民H7N9相关知识;优化政府危机管理模式,建立健全应急机制;严格控制媒体信息准入,提高媒体人社会责任感。     

钛掺杂对La0．7Ca0．3Mn1-xTixO3体系电阻的影响

该文通过对La0.7Ca0.3Mn1-xTiO3（X=0-0．15）样品在77K～300K温度范围内电阻的测量,研究了Ti掺杂后样品电阻随温度的变化规律．研究结果表明：在未引入钛杂质时,铁磁相的电阻率遵守T4,5关系,随着钛离子的引入,电子-电子、电子-磁振子以及电子-声子耦合变得更复杂,不能用单一模型来解释．     

比较教育的优势、弱势、功用及滥用——H·诺亚的见解

作为当代著名的比较教育学家,除了探索科学的比较教育方法体系之外,诺亚(H.J.Noah)在比较教育的学科性质方面也有很多独到见解.如他对比较教育的优势、弱势、功用及滥用等方面的研究,对我国今天比较教育学科的建设和发展仍具有重要启示.     

溶液酸度的三种标度方法比较分析

通过对溶液酸度的pH标度、酸度函数H0、AG标度的比较分析,提出用酸度AG代替pH,并进行了一些探讨。     

NEWMAN NOW: RE-EXAMINING THE CONCEPTS OF 'PHILOSOPHICAL' and 'LIBERAL' IN THE IDEA OF A UNIVERSITY

ABSTRACT:  Taking account of crucial differences between the social environments of universities in Newman's time and in ours, this paper considers two key concepts in the The Idea of the University , the 'philosophical' and the 'liberal'. It argues that, despite their merits, both concepts are beset by problems. And it suggests some lines of analysis, partly inspired by an Aristotelian influence both in Newman's own work and in some recent philosophy, that may help to address these problems and to support claims for the continuing power of Newman's thinking about university education.     

BBS树形结构存储和显示的实现

讨论了借助ASP和SQL Server 7.0数据库的特性,实现基于WEB页面形式的BBS树形目录结构数据存储显示的方法,并给出了存储及显示代码。     

Maternal work conditions and child development

How do maternal work conditions, such as psychological stress and physical hazards, affect children's development? Combining data from the Child Development Supplement of the Panel Study of Income Dynamics and the Occupational Information Network allows us to shed some light on this question. We employ various techniques including OLS with extensive controls, a value added approach and individual fixed effects in order to address potential endogeneity problems. Our results reveal that mothers’ exposure to work-related hazards negatively affects children's cognitive development and to work-related stress negatively affects children's behavioral development. While maternal time investments play a small but significant role in mediating these negative associations, paternal time investments neither reinforce nor compensate these associations.     

抽象凸空间中的不动点与变分不等式

本文将H空间中的Fan Glicksberg Kaku tani不动点定理推广到抽象凸空间中,并在抽象凸空间中给出一个不具拟凹性的函数的Ky Fan不等式的解的存在性定理。