Robust estimation of models of Engel curves

Both standard and robust methods are used here to estimate models of Engel curves for three household commodities, namely, food, transport, and tobacco and alcohol in Canada. The income elasticities of demand computed from the various methods differ significantly for the transport and tobacco-alcohol consumption where there are obvious outliers and zero expenditures problem. Robust estimators point to lower income elasticities and have better performance than the standard LS and Tobit estimator. These results are analyzed in the light of the information on finite-sample performance obtained in a previous Monte Carlo study. First version received: July 2000/Final version received: July 2001 RID="*" ID="*"  I wish to thank Victoria Zinde-Walsh, John Galbraith, Clint Coakley, two anonymous referees and an associate editor for helpful comments. I would also like to thank Anastassia Khouri for kindly providing the 1992 Family Expenditure Survey of Canada data.     

Global Entrepreneur Summit 2011 Wrapped Up in Beijing

The year 2011 turns out to be a tough year for global economic recovery with 2012 facing the alternative challenge of political and economic cycle.Developed countries are struggling to deal with sovereign debt crisis.At the same time,emerging countries are trying to find their independent development path.How to achieve rebalance between developed countries and emerging markets has become a core issue that secures stable global economic growth.     

浅谈基于Nagios的网管系统

网络管理员需要随时对网络的运行情况了如指掌,并在出现问题时能及时解决问题,从而维护网络的正常运转。Nagios开源网络管理系统,能很好的对网络的运行状态进行监测和控制,使网络能够有效、可靠和安全地提供服务。本文首先对Nagios软件功能进行系统分析,然后通过实例讲解如何利用它对Windows主机进行监控。     

外贸结构的非均衡机理探索

经济结构呈现非均衡的常态特征。在市场不完全、信息不充分、外生条件不统一等因素的制约下,一国外贸结构形成的资源配置效率通常低于均衡世界里的帕累托最优效率,是一种“次优”均衡;这种非均衡模式可能在受到外在冲击时或通过内生演进的方式发生改变,并通过进出口商品结构、贸易方式结构等表现出来。外贸结构非均衡的核心特征是进出口商品的要素密集度高低,并与比较优势和后发优势联系在一起,成为外贸结构非均衡演进规律的主要内容。     

装备采办效益优化研究:一个交易费用理论视角

交易费用理论指出,交易成本是制度的运行成本,其大小取决于交易形式与其制度的匹配程度,两者越匹配则其交易成本越小。从交易费用理论入手,通过分析装备采办成本的构成及决定因素,指出装备采办效益优化的关键在于选择和建立合理的制度以尽可能地降低采办的交易成本,即制度因素是我国装备采办低效的症结。在此思路下,探究了我国装备采办制度的不合理之处,并提出相应的政策建议。     

电力企业改革纵横谈

改革是关系着企业自身生存而势在必行的重要工作。如何改革?从企业文化建设、制度创新、领导作风和企业家精神等角度作了思考和探讨。     

城市政府“服务型管理”模式研究

城市管理水平的提高是城市"质"、"量"发展的必然要求,论文从城市管理的公共服务属性出发,提出了城市政府"服务型管理"的基本理念,并从城市管理的目标系统、组织体系、管理方法、控制机制四个模块对"服务型管理"模式的构建展开研究.最后,论文还对"服务型管理"的原则进行了探讨.