中国上市公司IPO后经营业绩变化情况的分析——来自A股公司的经验数据

本文以1999￣2000年在沪、深两市首发上市的216家A股公司为样本,以这些公司从首发前一年延伸至2003年的数据,研究了中国A股上市公司IPO前1年至后3年的收入、成本、费用及效益的变化。研究发现:与上市前相比,中国A股公司IPO后的主营业务收入、主营业务成本、期间费用等绝对数指标均显著上升,而主营业务收入营业利润率却显著下降;造成业绩下降因素很多,其中最直接的主要原因是公司上市后成本、费用的大幅度上升。     

经营杠杆与经营杠杆度的论述

本文运用杠杆原理,研究分析了经营中存在的经营杠杆及其杠杆度,推导出经营杠杆度的计算公式,阐明了经营杠杆在P-S图中的位置及其确定方法。得出以下几个结论:①经营杠杆是实际经营中客观存在的;②经营杠杆度DOL与安全边际系数MRS互为倒数关系,两者都对企业的经营状况起警示作用;③经营杠杆度DOL对销售收入S的函数为单调减函数;④企业应力求通过减小DOL来增加息税前利润EBIT。     

民营科技企业经营机制有关问题的探讨

民营科技企业的经营机制以特有的优势，为民营科技企业发展做出了巨大贡献，但随着竞争环境的变化，也在一定程度上限制了企业的进一步发展，因此，必须围绕民营科技企业的经营机制进行有重点的创新。     

我国土地征用制度探讨

国家为了公共利益的需要,可以依法对土地实行征用,但是这种征用必须符合公共利益、给予公平补偿、满足正当程序的要求。完善我国土地征用制度应该在这三个方面着手。     

The Announcement Effect of an Airport Expansion on Housing Prices

The purpose of this study is to examine the influence of the announcement of a new airport hub on housing prices near the airport. While numerous studies of airport noise have found that high noise levels reduce property values, few have been able to measure the announcement effect on values. The results indicate that after controlling to extraneous influences, housing property prices in a 2.5 mile band from the Greensboro/High Point/Winston Salem metropolitan airport declined approximately 9.2% in the post-announcement period. In the next 1.5-mile band, house prices declined approximately 5.7% in the post-announcement period.     

高层建筑电梯井施工操作平台装置的造价分析

高层建筑电梯井部位施工中操作平台装置的使用,需塔吊等提升机械配合,具有良好的操作性,能明显缩短作业时间,减少电梯井结构施工时脚手架搭设的麻烦。实践证明,该平台装置不仅操作比较便捷,经济效益也十分可观。使用操作平台装置的直接费较钢管脚手架降低率为81.9％,并且随着建筑高度的增加,造价差异趋向扩大。     

制造业习性成本结构和经营安全程度分析

本文以制造业上市公司为研究对象,从收入动因成本中分解出收入动因固定成本和收入动因变动成本,进而计算出习性成本结构指标、保本点指标以及经营安全程度（安全边际率）指标。通过习性成本结构和经营安全程度分析可以得出以下研究结论：（1）以收入动因成本和营业净收入为基础进行的习性成本结构和经营安全程度分析是合理的、可靠的;（2）制造业整体上变动成本比重较高,行业整体营业净收入中变动成本比重为89.44%;（3）制造业整体经营风险较低,行业整体安全边际率为77.71%,处于“很安全”的范围。     

中原生态经济区的建设与规划分析

中原生态经济区强调同时实现环境、经济、社会效益,侧重相互合作与整体利益,突出资源的节约共用与可持续发展,是工业系统、交换系统、社会网络、文化氛围的营造以及各种基础设施的物质空间建设,其健康运行需要区域经济发展、综合治理、循环经济发展、生态工业网络的政策支持。     

Ratio-based design hour determination for airport passenger terminal facilities

To avoid both over-design and under-sizing of airport passenger terminal facilities such as security checkpoints, the infrastructure is designed for a specifically determined design load. As such, the design load is considered for a short period of time, usually an hour of operation, during which peak, though not necessarily maximum, demand occurs. For strategic planning applications, future design loads can be determined by either fictitious flight schedules or ratio-based models which forecast the relationship between design load and annual demand. This study presents two ratio-based methods which allow the direct determination of design hour loads (DHL) for passenger terminal facilities. The unsaturated DHL model considers the relationship between observed passenger flows in the terminal and aggregated annual demand data. The saturated DHL model includes several operational constraints which limit the actual DHL, such as limitations in the runway system or the fleet mix operating at an airport. Both models are applied to two real-world airports, for which the DHL of the security checkpoint facilities is estimated from large datasets covering multiple years. Results are significant at the 5 % level and suggest that the proposed ratio-based methods are appropriate for airport strategic planning applications.     

The design of light-handed regulation of airports: Lessons from experience in Australia and New Zealand

The difficulties experienced with traditional forms of economic regulation of airports involving direct control of prices have led to an interest in light-handed regulatory frameworks. Experience with light-handed regulation of airports is primarily confined to Australia and New Zealand. The paper examines the design features of light-handed regulation in Australia and New Zealand in relation to the stated objectives associated with the introduction of light-handed regulation. The paper identifies important aspects associated with the design of light-handed regulation including the incorporation of a credible threat of stronger regulation and the characteristics of this, and an apparent trade-off in objectives achieved with different approaches to light-handed regulation.