郑州市绿色交通概念

通过对可持续发展概念的介绍和城市绿色交通理念的论述,逐步阐述了城市发展绿色交通的重要性和紧迫性;借鉴国内外城市交通建设的先进经验,应用城市规划、需求分析、系统工程等原理,对郑州市现有的交通状况以及存在问题进行分析并提出解决方案。     

图们江区域经济合作中存在的问题及应采取的对策

图们江区域经济合作虽取得了一定的成绩,但在开发模式、基础设施、协调机制等方面还存在着诸多问题,因此必须加快基础设施建设,推进珲春的通道建设,解决融资瓶颈,开拓对俄经贸合作,从而促进该区域的加速发展。     

农民工城市融合概念及对城市感知关系的影响——基于上海农民工的调查研究

数以亿计的农民工和谐融入城市是当前以及未来中国社会发展中的重大问题。为了研究文化融合、经济融合、政治融合和社会融合等诸方面的因素是如何影响农民工对城市的感知关系水平的,基于2010年在沪农民工的问卷调查数据,考察了农民工城市融合诸因素对城市感知关系(生活满意度、认同度、未来发展意愿)的影响。发现:文化融合程度越高,农民工对上海的认同程度就越高,也会更愿意留在上海发展,但其生活满意度未必越高;经济融合程度越高,城市生活满意度、城市认同度和未来留在上海发展的意愿都越高;政治融合只对未来发展意愿有影响;社会融合越高,农民工对城市的认同度越高,对生活也越满意。研究为政府引导和促进农民工和谐融入城市提供了新的视角。     

城市青年消费文化解读

随着商品化生产的发展和市场的兴旺,青年一代的消费观念、消费方式、消费心理都出现急剧变化,城市青年消费文化呈现攀比性、自我性、显示性、不稳定性等特点,将产生一定的负面影响,不利于青年健康成长。因此,迫切需要营造健康、积极、和谐的青年消费文化。     

Area Differences and Time Trends in Crime Reporting: Comparing New York with Other Metropolitan Areas

Police measures of crime are shaped by victims’ decisions to notify the police. To obtain a better understanding of US crime trends, this study uses the National Crime Victimization Survey to examine geographic differences and temporal trends in crime reporting in New York and other metropolitan areas for the period 1979-2004. We find that net of crime characteristics and survey methodology, the New York metropolitan area showed fewer increases in crime reporting than did other metropolitan areas. These divergent trends suggest that the real differences in the drop of nonlethal violence between New York and other areas may have been smaller than those indicated by police-based crime statistics. We also find that from the early 1990s to 2004, New York showed a sharp decrease in the likelihood of victims perceiving that “police wouldn’t help.” This trend suggests that police reforms in New York City have not resulted in more victims using police-related reasons to explain their nonreporting behavior. Instead, researchers need to develop a broader theoretical framework (not an exclusive focus on police actions) to understand how police- and nonpolice-related factors may explain the geographic variation in the trends of reporting observed in this study.     

环保督察与空气质量改善:立足城市情境的效应异质性分析

作为生态环境保护领域的一项重大制度创新,中央环保督察已经成为党和政府推动生态文明建设的重要政策工具。然而,对于中央环保督察能否改善空气质量,尤其是其效果的可持续性,尚存在诸多争议。立足于匹配后的地级市数据评估中央环保督察对空气质量改善的平均效应,结果表明中央环保督察尽管在短期内显著改善了空气质量,其长期效应并不显著。然而,借助基于模型的递归分解法和随机森林法进一步发现:中央环保督察的长期效应存在显著的情境差异性:中央环保督察对于空气污染较重的城市具有长期改善效应,且东部城市尤为明显;一个城市的经济发展水平越高,中央环保督察效应越具有长效性;政府规模和财政自主性对中央环保督察效应起到截然相反的调节作用:前者的扩张会削弱长期效应,而后者的提升则会强化长期效应。揭示城市情境对督察效应的调节作用,有助于深化学界对中央环保督察长效性的条件认识,也为进一步完善该制度、提升其效能提供了重要的思路。     

Does police patrol in large areas prevent crime? Revisiting the Kansas City Preventive Patrol Experiment

Research Summary

The Kansas City Preventive Patrol Experiment (KCPPE) was seen by its developers to have produced “consistent evidence of the lack of effects of any consequence on crime,” a conclusion that was to have a strong impact on assumptions about police patrol for almost half a century. We identified the original official crime data from the KCPPE, and reanalyzed outcomes focusing on a comparison of the “proactive” versus “control” beats (“reactive beats” were criticized because of violations of treatment integrity); examining broad categories of crime (to increase statistical power); and using count regression models. Our findings are not unequivocal, but point to modest impacts of police patrol on crime in police beats.

Policy Implications

Our findings suggest that lessons drawn for half a century from the KCPPE need to be revisited. The KCPPE does not show that police patrol in large areas has no influence on crime, and this finding is consistent with several more recent studies. At the same time, we note that the effects of patrol in the KCPPE using our analysis strategy, and those found in other studies of preventive patrol in larger areas, are about half that found in hot spots policing studies. This suggests that police agencies ideally should invest in focused hot spots policing initiatives. However, absent an ability to manage such initiatives, or the crime analysis capabilities to identify crime hot spots routinely, simpler preventive patrol schemes to utilize uncommitted patrol time can be seen as potentially effective in preventing crime.     

Metropolitan Change and Uneven Distribution of Urban Sub‐Centres in Mexico City, 1989–2009

The spatial expression of urban centrality in big cities is generally associated with several urban nodes. The major purpose of this article is to identify the spatial pattern of urban sub‐centres in Mexico City during the period 1989–2009 and how changes in urban centrality have given way to a more polycentric urban structure. A double‐threshold method was used for comparing the polycentric structure of a single city over time examining the variables of number of jobs and tertiary employment density; this approach for identifying employment centres is proven in a megacity of a developing country.     

统筹山东城乡发展的思路与对策

改革开放以来,山东省农业和农村经济取得了长足发展。但是由于长期形成的城乡二元结构格局的影响,城乡经济社会发展差距仍比较大。解决“三农”问题,必须树立和落实科学发展观,统筹城乡发展,充分发挥城市对农村的辐射和带动作用、工业对农业的支持和反哺作用,促进城乡经济良性互动、共同发展。