窨井盖设计:创意与功能的定位考察--从城市规划的文化品位视角

本文介绍了欧美国家及日本的城市窨井盖创意思路,剖析了我国城市规划中窨井盖设计的问题及现状,提出了在保证窨井盖实现其市政设施功能的同时,赋予其更多的功能,如：指示路标功能、广告宣传功能、传承地方文化功能等。本文意在强调要以新颖的设计创意与多元功能定位的思路,给予窨井盖以持久鲜活的生命与活力,增添文化元素,提高窨井盖功能,这有助于提升市政规划的文化品位。     

On the discrete mean past lifetime

Let T denote a positive discrete survival time and n a non-negative integer number. Properties of the mean past lifetime E(n  −  T|T  <  n) are provided. M. Asadi’s work is supported by the University of Isfahan Grant 850713.     

Logarithmic quasi-homothetic preferences

We study a class of quasi-homothetic preferences, which result in demands that are logarithmic in own prices when these have a negligible impact on aggregate prices (as in monopolistic competition models). Thus marginal revenues are computationally friendly and well behaved.     

水泥稳定碎石的作用原理及在公路施工中的应用

水泥稳定碎石作为路面基层,具有早期强度高,雨季对施工影响相对较小,施工机械化程度较高等特点,这些都有利于保证进度和质量,因此被越来越广泛地应用到市政道路工程中去。为此,本文针对城市道路半刚性基层采用水泥稳定碎石的技术研究进行简要分析,以供参考。     

Economic reforms,efficiency and productivity in Chinese banking

This paper analyzes the impact of banking reforms on efficiency and total factor productivity (TFP) change in Chinese banking industry. Using an input distance function, we find that joint-equity banks are more efficient than wholly state-owned banks (WSOBs). Furthermore, both WSOBs and joint-equity banks are found to be operating slightly below their optimal size, suggesting potential advantages in expansion of their businesses. Overall, TFP growth was 4.4% per annum for the sample period 1993–2002. Joint-equity banks experienced much higher growth in TFP (5.5% per annum) compared to the WSOBs (1.4% per annum).      

全球化、柔性化、复合化、差异化:信息时代城市功能演变研究

结合信息技术对中国城市影响的实际,从信息技术影响下城市空间相互作用方式、空间结构的构成要素及其影响因素的变化出发,对信息时代国内城市功能特征进行研究变得尤为重要.全球化、柔性化、复合化、差异化已成为信息时代城市功能的主要特征;信息流和接入信息的能力变得尤为重要;每个城市都成为全球或区域城市网络的一个节点;部分服务的区位选择因此也表现出较大的弹性;城市居住空间分异仍然存在,影响因素越来越复杂.     

Does income inequality increase marginal propensity to consume?

This article empirically investigates the effects of income inequality on the marginal propensity to consume (MPC), using panel data of 22 OECD countries over the period 1994–2015. We find that MPC increases dramatically as income inequality increases. In subsample analyses, the MPC of a high inequality group is more than twice that of a low inequality group.     

有效供给不足抑制中国消费需求——从长短期消费函数看消费不足的问题

2005年是中国经济改革的关键一年,但目前宏观经济中出现了GDP增速减缓和消费需求疲软的突出矛盾。如何解决这一矛盾?相关文献通常在凯恩斯短期消费函数的基础上,认为消费拖累了GDP增长,并建议实施提高消费倾向、刺激消费需求的宏观消费管理政策。文章通过长期消费函数分析后发现是有效供给不足压抑了消费。因此,文章建议从加强供给管理入手,为社会提供更多的有效供给才是化解宏观经济矛盾的战略选择。