政府规制与中国稀土产品出口增长的二元边际?--对2001-2012年微观贸易数据的实证分析

采用HS?6位数级微观贸易数据,计算2001—2012年中国稀土产品出口增长的二元边际,并进一步分析相对出口规制程度、相对产量与出口增长二元边际之间的相互影响,结果表明：中国稀土产品出口规制政策对稀土产品出口增长的集约边际和扩展边际都有促进作用,其中对集约边际的影响更大;而相对产量对二元边际有负面影响。在中国经济新常态下,随着稀土产品出口规制政策的逐步弱化,应加强对稀土产业的生产规制,提高产品附加值,实现从规模速度型粗放增长向质量效率型集约增长的转变;并积极开拓新的出口市场,促进稀土产业的良性扩张。     

‘The life of crime does not pay; stop and think!’: the process of co-constructing a prototype pedagogical model of sport for working with youth from socially vulnerable backgrounds

Purpose: This study discusses the process of co-constructing a prototype pedagogical model for working with youth from socially vulnerable backgrounds.

Participants and settings: This six-month activist research project was conducted in a soccer program in a socially vulnerable area of Brazil in 2013. The study included 17 youths, 4 coaches, a pedagogic coordinator and a social worker. An expert in student-centered pedagogy and inquiry-based activism assisted as a debriefer helping in the progressive data analysis and the planning of the work sessions.

Data collection/analysis: Multiple sources of data were collected, including 38 field journal/observation and audio records of: 18 youth work sessions, 16 coaches’ work sessions, 3 combined coaches and youth work sessions, and 37 meetings between the researcher and the expert.

Findings: The process of co-construction of this prototype pedagogical model was divided into three phases. The first phase involved the youth and coaches identifying barriers to sport opportunities in their community. In the second phase, the youth, coaches and researchers imagined alternative possibilities to the barriers identified. In the final phase, we worked collaboratively to create realistic opportunities for the youth to begin to negotiate some of the barriers they identified. In this phase, the coaches and youth designed an action plan to implement (involving a Leadership Program) aimed at addressing the youths’ needs in the sport program. Five critical elements of a prototype pedagogical model were co-created through the first two processes and four learning aspirations emerged in the last phase of the project.

Implications: We suggest an activist approach of co-creating a pedagogical model of sport for working with youth from socially vulnerable backgrounds is beneficial. That is, creating opportunities for youth to learn to name, critique and negotiate barriers to their engagement in sport in order to create empowering possibilities.     

Mapping cultural assets and evaluating significance: theory,methodology and practice

Over the last decade in the UK, there has been a notable shift in the popularity and use of cultural mapping as a methodology for policy making at a regional and local level. This follows increased demand for an informed framework for planning arts and cultural facilities from local and regional government and from within the cultural sector (Evans, 2008: p. 65). The article begins with an exploration of cultural mapping within cultural policy, which explores the context for the growth in this area of activity, and why this kind of activity appeals to policy makers and organisations. It then goes on to examine four cultural mapping exercises which have been undertaken in recent years in the UK. These studies have been chosen because although they all focus the mapping of cultural assets within a specific geographic area, they differ to one degree or another in purpose, context, definition, geographic scale and methodology. They illustrate the narrow range of approaches deployed in the cultural mapping field in the UK, and as such provide a useful means of critically reviewing their limits as well as highlighting the issues and challenges faced by cultural cartography in practice. The article concludes by considering the type of mapping research that is “allowed” within the discursive confines of consultancy based cultural policy research.     

企业进入、产业波动与就业增长——对我国高技术产业的实证分析

考虑可能影响地区就业增长的微观和宏观因素,利用我国2000—2009年31个省市区高技术产业的数据,通过面板PDLS模型和分位数回归模型实证分析企业进入和产业波动对就业增长的影响,研究结果表明:企业进入对就业增长的影响呈现出波浪形的变化趋势,从短期和长期来看,企业进入对就业增长有正向的促进作用,但从中期来看则表现为负向影响;产业波动对就业增长的影响呈现出先正后负的变化趋势,在短期内产业波动可以促进就业增长,长期内则会抑制就业增长。政府应降低行政性准入壁垒对企业进入的消极影响,营造公平的市场进入环境和完善的产业发展环境。     

基于理论研究视角下体育与经济增长和经济发展的关系

摘要：近几年体育和社会经济文化发展的关系日益紧密,体育消费和体育产业在经济增长和经济发展中的作用日益重要且多元化,体育产业吸引着越来越多的要素投入,现实要求理论研究更加深入且紧密结合实际。从理论研究进展的视角,运用文献资料法,以体育与经济增长和经济发展的关系为研究对象,对2001—2008年和2009—2015年2个阶段我国理论界的相关研究成果进行了较为系统的梳理。结果显示,在研究内容方面,体育产业将成为新的经济增长点、体育经济是克服经济衰退的特殊产业经济、体育产业的发展应重视绿色和环保等观点具有前瞻性和创新意义。在研究方法方面,第一阶段的定性分析和规范分析较多,第二阶段定量分析和实证分析逐渐增多。在对已有研究成果客观简要评价的基础上,提出未来一段时期体育与经济增长和经济发展关系研究的着眼点：1）加强跨学科理论研究;2）加强体育有效供给研究;3）加强体育与经济发展关系的研究;4）理论联系实际,加强定量研究,目的旨在使研究成果更好地服务于政府决策和企业发展。     

9周课外体育锻炼对高中生身体基本生长发育指标的影响

将随机抽样的高中生分为具有可比性的两组,两组都参加学校规定的体育教学活动,膳食结构相似,实验组每日课外再增加45分钟的运动时间,持续9周,结果显示,进行课外锻炼后,学生的身体基本发育指标和人体成分结构有明显的提高,建议高中生应在课后加强体育锻炼.     

共轨式喷油系统数学模型

针对高压共轨喷油系统所特有的工作过程和部件结构 ,建立了系统各部件综合的数学模型 ,并采用有限容积法对方程进行了离散 ,对系统的压力特性、电磁特性和控制参数等进行了仿真 ,为系统的参数设计、标定提供了依据。     

Reliably Assessing Growth with Longitudinal Diagnostic Classification Models

Recent advances have enabled diagnostic classification models (DCMs) to accommodate longitudinal data. These longitudinal DCMs were developed to study how examinees change, or transition, between different attribute mastery statuses over time. This study examines using longitudinal DCMs as an approach to assessing growth and serves three purposes: (1) to define and evaluate two reliability measures to be used in the application of longitudinal DCMs; (2) through simulation, demonstrate that longitudinal DCM growth estimates have increased reliability compared to longitudinal item response theory models; and (3) through an empirical analysis, illustrate the practical and interpretive benefits of longitudinal DCMs. A discussion describes how longitudinal DCMs can be used as practical and reliable psychometric models when categorical and criterion‐referenced interpretations of growth are desired.     

Digital Module 16: Longitudinal Data Analysis

In this digital ITEMS module, Dr. Jeffrey Harring and Ms. Tessa Johnson introduce the linear mixed effects (LME) model as a flexible general framework for simultaneously modeling continuous repeated measures data with a scientifically defensible function that adequately summarizes both individual change as well as the average response. The module begins with a nontechnical overview of longitudinal data analyses drawing distinctions with cross-sectional analyses in terms of research questions to be addressed. Nuances of longitudinal designs, timing of measurements, and the real possibility of missing data are then discussed. The three interconnected components of the LME model—(1) a model for individual and mean response profiles, (2) a model to characterize the covariation among the time-specific residuals, and (3) a set of models that summarize the extent that individual coefficients vary—are discussed in the context of the set of activities comprising an analysis. Finally, they demonstrate how to estimate the linear mixed effects model within an open-source environment (R). The digital module contains sample R code, diagnostic quiz questions, hands-on activities in R, curated resources, and a glossary.     

GM(1,1)模型群在体育预测中的应用研究

本文论述在体育预测中运用GM（1，1）模型群的理论依据，介绍了GM（1，1）模型群的主要内容和使用方法，并结合男子链球老将毕忠最佳运动成绩．从理论和实践两个方面对GM（1，1）模型群在体育中的预测，做了较为细致的研究，并对应用中所存在的一些限制性因素进行探讨。旨在推广灰色系统理论在体育中的应用．使其能够更好、更科学地为体育事业服务。