北京应开展整体"安全奥运"的建设--写在北京申奥成功四周年的思考

从城市现代化的国际背景及安全态势入手,结合北京城市的灾害背景,系统研究并提出了2008年"安全奥运"建设应强调全过程、全寿命周期的控制对策,并解析了"安全奥运"的风险、工程、管理与文化的四大基本思路.     

Robust and secure implementation: equivalence theorems

This paper shows that in private value environments, strategy-proofness and the rectangular property are necessary conditions for (full) robust implementation (Bergemann and Morris, 2011). As corollaries, we obtain the equivalence between robust and secure implementation (Saijo et al., 2007), the revelation principle for robust implementation, and characterization of double implementation in robust and secure implementation.     

A note on the sustainability of full employment in the presence of budget deficits

In a recent issue of this journal, Tymoigne and Wray, as well as Palley, discussed whether economies can experience stable full-employment equilibria with persistent public budget deficits. This implies continuous growth of a stock-variable: high-powered money and/or government bonds in the hands of the private sector. Their discussion assumed a stationary state. The question is whether such a situation can be regarded as sustainable over time. This paper argues that a satisfactory solution to the problem can be found only by abandoning the hypothesis of stationary state and considering the effects that different compositions of public expenditure have on the rate of growth. To have a stable full-employment equilibrium with budget deficits, the economy must grow. Since the economy is assumed to be in full employment, the growth of aggregate output must be entirely due to the growth of productivity, which can be realized by changing the composition of public spending in favor of productive expenditures.     

Effects of internal resources on airline competitiveness

This article examines the performances of 114 major international airlines between 1987 and 2010 using the resource-based theory. Results show that intangible resource is the most important resource among the human, physical and intangible resources at the aggregate industry level. In addition, successful airlines need to be able to provide an adequate level of service at relatively low cost. Nonetheless, some airlines enjoy higher profits than the others due to the country-specific differences arising from the bilateral open skies agreement between countries, the geographical location of the airline hub etc. There are also evidences suggesting an increasing consumer acceptance of new airlines, which connote that established airlines cannot be complacent. Following the emergence of budget airlines that provide point-to-point service to short distance destinations, full legacy carriers could differentiate themselves by offering direct connections on long-distant flights.     

一起母线电压互感器的故障分析

通过对朔州向阳堡220kV变电站东、西母220kV电压互感器的故障分析,发现了设备存在的隐患,为了避免该设备故障扩大,及时进行了更换处理,并总结了预防措施,为同行也提供了经验。     

Average-cost pricing: Some evidence and implications

We present new survey evidence on pricing behavior for more than 14,000 European firms, and study its macroeconomic implications. Among firms that are price setters, roughly 75% respond that their prices are set as a markup on total costs, a business practice termed “full cost pricing”. Only 25% set prices as markups over variable or marginal costs. Moreover, using industry data for the U.S., we find that the correlation between changes in output prices and changes in variable input prices is significantly lower when fixed costs are likely to be more important.Since our results are similar to the findings in the classic and controversial paper of Hall and Hitch (1939) and subsequent survey evidence, we believe it worth studying the implications of full cost pricing for macroeconomics. We first propose a problem for the firm where full cost pricing can arise as optimizing behavior. We embed this problem, featuring an occasionally binding constraint, into a simple general equilibrium model. We show that when the model is hit by a shock that makes the constraint binding, the response of endogenous variables is amplified significantly more than it would be under the unconstrained regime.     

美国企业并购浪潮评述

在并购浪潮假设的基础上,提出并购浪潮的经验性量化定义.从技术、社会和经济等背景分析了美国五次企业并购浪潮的起因,在介绍每次并购浪潮的强度后,分析了它们的各自特点.认为通过五次并购浪潮,在并购形式上完成了一次循环,产业组织趋于合理和成熟.指出科学技术进步、政府通过法律手段的干预和证券市场的发展对企业并购有重要影响.     

股权流动性分裂的八大危害--中国资本市场为什么必须进行全流通变革

从结构和功能上看,中国资本市场长期以来都处在不正常状态.这种不正常状态最根本的制度性原因是股权的流动性分裂.从现实看,股权流动性分裂为中国资本市场带来了八大危害,从而严重损害了中国资本市场风险与收益之间的匹配机制,客观上使流通股股东与非流通股股东处在不平等的状态.为此,要使中国资本市场有一个坚实、平等的制度基础,要使中国资本市场有一个蓬勃发展的未来,惟一的出路是必须进行股权的流动性变革,以形成一个利益机制一致的股权结构.     

浅谈色谱在线监测装置在电力变压器上的应用

通过安装变压器色谱在线监测装置系统,可以定量、自动、快速地在线监测变压器油中溶解故障气体的含量及其增长率,并通过故障诊断专家系统提前预测变压器故障隐患信息,及时发现大型油变压器内部过热、放电等故障,避免因变压器事故,造成电网故障,提高变压器运行的可靠性,及时对其进行预防性维修,使得电力系统安全可靠的运行。     

混凝土梁板裂缝的超声检测与灌胶修补技术

本文提出了结构混凝土裂缝超声检测的实用步骤及灌胶补强处理的实用方法。通过实验和工地实际使用表明 ,这些步骤和方法效果良好 ,完全能满足实际施工要求