共查询到12条相似文献,搜索用时 46 毫秒
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运用交易成本理论,重新求证了铁路客运网运分离的有效性,网运分离对于中国铁路客运进一步提高效率、降低成本、加快发展,具有十分重要的意义. 相似文献
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《综合运输》2016,(4)
PPP模式能够满足公共基础设施需求,有效改善政府大量负债现象、促进管理效率提高,因而成为各国在基础设施方面广泛采用的方法。然而在PPP项目合同执行过程中,不可避免要发生再谈判,影响了PPP合同执行效率。本文分析了PPP项目再谈判的文献,得出如下结论:再谈判现象的影响因素主要划分为不完备合同、机会主义行为以及外部环境变化i再谈判行为既可能导致合作提升项目价值,也可能导致政府或者公众利益受损,进而减少社会剩余;治理再谈判主要是完善合同规制和外部规制,增强基于关系契约的沟通、信任等能促进再谈判向着合作方面发展,提升项目价值。最后,本文提出改善PPP合同绩效的措施。 相似文献
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根据齿轨铁路的工程特点,分析齿轨铁路基础设施综合维修的相关需求。借鉴国内既有铁路的综合维修模式,提出适合齿轨铁路的综合维修模式。进而对综合维修体系的组织机构设置及具体机构布点提出了建。 相似文献
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随着我国社会经济发展水平的不断提高,汽车使用量持续攀高。大力发展新能源汽车,能够促进资源充分利用,减少汽车尾气排放,对保障能源安全、促进节能减排、防治大气污染、推动我国能源可持续发展具有重要意义。随着电动汽车的推广使用,电动汽车对充电站的基础设施建设以及服务网络的完善等需求日益紧迫。充电基础设施的建设,用以满足电动汽车的发展需求,并以充电设施、充电系统的适度超前发展引导电动汽车的业务发展。 相似文献
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Taotao Deng 《运输评论》2013,33(6):686-699
ABSTRACTThe paper provides an update of the survey focusing on estimating the contribution of transport infrastructure to productivity and economic growth. The central questions addressed are possible reasons behind the conflicting results reported in the literature on the elasticity of economic output with respect to transport infrastructure investment. After providing a systematic review of recent empirical studies on the effects of transport infrastructure on productivity and economic growth, the paper notes that controversial results can be attributed to ten causes (grouped into three categories for distinguishing): (1) related to different contexts: research period, geographical scales, and country's capability in enabling economic development; (2) related to different phenomena that are being measured: different economic sectors, different types of transport infrastructure, and different quality levels of transport infrastructure; and (3) related to distinct ways of measuring a similar phenomenon: measures used to describe the dependent variable and explanatory variable, functional specification, and estimation method of the econometric model. Strong network externalities of transport infrastructure may result in nonlinearity of the relationship between transport infrastructure and economic growth. Moreover, the absence of spatial concerns in infrastructure's impacts is another important source of inconclusive results. Finally, building on recent literature, the paper has discussed policy implications and identified several research avenues for further research. 相似文献