收入、预期寿命和社会养老保险收入再分配效应

本文在考虑职工基本养老保险典型不同缴费基数参保者寿命存在异质性的情况下,通过内部收益率的计算考察典型不同缴费基数参保者之间的养老金收入再分配效应。首先根据省级宏观截面数据估计了职工基本养老保险典型不同缴费基数参保者退休时的平均余命,再据此分别计算和比较不同参保群体的内部收益率。 研究发现职工基本养老保险制度总体上呈现微弱的正向收入再分配效应。虽然低缴费基数参保者内部收益率略高于中、高缴费基数参保职工,但其内部收益率因相对较短的寿命而大大降低。这也提醒政策制定者在研究制定延迟退休、社会养老保险全国统筹等政策时需要充分考虑参保职工内部不同群体间的平均预期寿命差别,对低收入参保者予以特别关注。     

城管执法冲突的三方感知与对策建议——以昆明市五华区为例

从1997年全国第一个综合执法试点建立到现在,城管队伍已经经过了15年的发展。新闻媒体上越演越烈的城管执法冲突事件,给这个直面大众的城市管理部门蒙上了一层阴影。本文以昆明市五华区为例,探究执法者、被执法者以及第三方(其他城市居民)的心理情感和冲突感知,据此剖析城管执法冲突发生的原因,并从转变执法理念、完善法制建设、提高人员素质、调整执法方式、加强舆论宣传等方面提出解决冲突对策。     

劳动力就业城市选择对城市工资溢价的影响

中国逐步从定居社会转变为流迁社会,劳动力大范围流动体现在就业城市的自主选择上,该行为对城市工资溢价产生持续影响,同时城市工资溢价又影响劳动力的就业城市选择。利用2017年中国流动人口动态监测调查数据,构建包含个体选择的处置效应模型,实证分析发现,中国存在城市工资溢价现象,劳动力的异质性特征和城市差异性特征显著影响就业城市选择行为;纠正劳动力城市选择的内生二元选择偏差后,发现中国特大城市和超大城市的工资溢价变大,而大城市的工资溢价消失,中小城市工资比大城市更有竞争力。中国城市体系中的首尾优势是劳动力理性选择就业城市的结果,这为中国实施差异化的城市发展政策来实现城市体系的整体优化和内部协调提供了新思路。     

中国城镇新增住房需求规模的测算与分析

本文围绕城镇家庭户自然增长、城镇家庭户机械增长和城镇存量住房拆除三项需求来源,设计了基于人口普查等公开统计数据定量测算城镇新增住房需求规模的系统性方法,对2001—2010年和2011—2015年间全国和各省份城镇新增住房需求规模进行测算与分析。在此期间新增住房供需关系经历了从基本均衡向供过于求的变化,同时存量住房拆除引致的被动需求取代城镇家庭户自然增长和机械增长引致的主动需求,成为新增住房需求的最主要来源。东、中、西部省份在新增需求规模、新增供需比、需求结构等方面表现出明显差异。本文还进一步对2021—2030年的发展趋 势进行了定量预测。由于三项需求来源均趋于下降,2021—2025年和2026—2030年间全国年均城镇新增住房需求规模预计将较2011—2015年间分别下降33%和53%。本文设计的城镇新增住房需求规模测算方法和预测思路能够为各级政府“十四五”住房发展规划编制、房地产企业战略制定等提供参考。     

An Ethnographic Approach to Understanding Service Use Among Ethnically Diverse Low Income Families

Poverty is linked to disparity in families access to basic human services and an incapacity to fulfill basic needs. The study described in this paper uses a qualitative research design to address the ecology of service use in the family within the broader social and physical environment. While the focus of this paper relates to the methodology of the study, some substantive results are used for illustrative purposes. Through an in-depth study of families in the contexts of their neighborhoods, our task is to search for patterns and their meanings. This process may uncover the motives and beliefs underlying service use and access among the families in our study.     

Measuring conflict management,emotional self-efficacy,and problem solving confidence in an evaluation of outdoor programs for inner-city youth in Baltimore,Maryland

Substantial evidence supports the value of outdoor education programs for promoting healthy adolescent development, yet measurement of program outcomes often lacks rigor. Accurately assessing the impacts of programs that seek to promote positive youth development is critical for determining whether youth are benefitting as intended, identifying best practices and areas for improvement, and informing decisions about which programs to invest in.We generated brief, customized instruments for measuring three outcomes among youth participants in Baltimore City Outward Bound programs: conflict management, emotional self-efficacy, and problem solving confidence. Measures were validated through exploratory and confirmatory factor analyses of pilot-testing data from two groups of program participants. We describe our process of identifying outcomes for measurement, developing and adapting measurement instruments, and validating these instruments.The finalized measures support evaluations of outdoor education programs serving urban adolescent youth. Such evaluations enhance accountability by determining if youth are benefiting from programs as intended, and strengthen the case for investment in programs with demonstrated success.     

城市新移民文化研究

作为一个文化群体的存在,新移民在文化上具有山寨性、快餐性、开放性等特征。这些特征既是他们扎根城市生活的生活写照,也显示了他们永不言弃奋斗精神之下潜伏着的集体张力。新移民文化在很大程度上再次点燃了城市的文化活力。新移民文化所拥有的现象特征与内生动力,显现出其所蕴含的城市革新力量与未来发展潜能。他们是推动中国城市化进程至关重要的一环,乃至成为整个中国未来现代化事业中值得信赖的有生力量。     

上海推进“城中村”改造研究

改造"城中村",有利于改善居民居住生活质量,促进城乡统筹发展;有利于盘活存量用地,推进土地的节约、集约利用;有利于改善城乡形象、推进宜居城市建设。上海进一步推进"城中村"改造,须加强领导,推进"城中村"改造的体制机制建设;要均衡各方利益,调动政府、开发商和农民三方的积极性;要摸清底数,对纳入全市统一改造计划内的"城中村"实行目录管理;要因地制宜,针对各个"城中村"不同的情况进行分类指导;要突破创新,建立、健全支持"城中村"改造的政策体系;要营造氛围,形成有利于推进"城中村"改造的良好外部环境。     

Case study for evaluating campus sustainability: nitrogen balance for the University of Minnesota

American ecologists recently began to address the ecology of cities. Concurrently, higher education institutions have developed sustainability education programs and instituted sustainability policies and projects. This paper draws together these two disparate areas by examining the nitrogen (N) budget of the Twin Cities campus of the University of Minnesota. We addressed the question: what were the annual inputs, outputs and internal cycles of N on the University of Minnesota Twin Cities campus? We found that 508 Mg N yr-1 were brought into the campus and 494 Mg N yr-1 were emitted from the University of Minnesota campus. The largest N inputs were abiotic fixation (conversion of N₂ to NO_x by combustion) and food for humans and animals. The largest N output was NO_x, followed by wastewater. Our results expand the understanding of the ecology of institutions within an urban area and provide an opportunity for improving urban ecology education and environmental policy at educational institutions.     

Three Gorges Project: Effects of Resettlement on the Environment in the Reservoir Area and Countermeasures

Environmental problems resulting from human displacement and resettlement are considered to be secondary impacts of hydro projects. There is a significant gap in knowledge concerning the environmental consequences of resettlement of the Three Gorges project (TGP), China. This study examines critical environmental problems associated with the TGP resettlement. It reveals that the contradiction between the land inundation and demand for land in resettling rural residents is a critical environmental issue. On the positive side, countermeasures that are discussed include: engineering works for farmland protection, developing eco-agriculture, reforestation and constructing a green belt in the peripheral zone of the reservoir, and adjustments to resettlement policy.