Additive and Multiplicative Uncertainty Revisited: What Explains the Contrasting Biases?

above the certainty level while for additive uncertainty the price should be lower than the certainty level. This note gives an intuitive explanation for the result after first presenting a parsimonious review of the two models. We also discuss which, if either, of the two models is more realistic. Received December 14, 2001; revised version received July 16, 2002 Published online: April 30, 2003 We thank referees for helpful comments. Ciaran Driver would like to acknowledge the research facilities from ANU, Canberra for their help in writing this paper.     

优化河南投资环境途径探析

投资超常增长是促使经济快速发展的重要因素，河南投资环境基础比较好，应该扬长避短进一步优化，其具体途径可以从投资的国际经济环境、投资的国内经济环境、投资的区域经济环境入手。     

论商标反向假冒行为及其法律规制

商标反向假冒行为妨碍了他人对自己商标的正常使用，扰乱了正常的市场秩序，欺骗了广大消费者和公众。很多国家的立法都明文对其进行规制，我国现行法律亦从不同角度对其进行规制。当前，对严重的商标反向假冒行为，应予以刑法调整。     

iTV: A major opportunity for financial services,or not?

Interactive television has arrived, thanks to substantial technology investments that have been made by Sky and others. It is growing in importance as innovative interactive applications are developed for broadcast programmes (eg the BBCi service and Big Brother), and for advertising — and will develop further when broadband deployment gets to critical mass. Readers should not expect a television-variant of the world wide web, however. This was tried during 2000–2002 in the form of web look-alike, interactive ‘walled garden’ sites, and failed to attract critical mass footfall. The model has evolved and now revolves around interactive content synchronised with broadcast, which offers financial services companies an interesting new way to increase awareness and to differentiate the service presentation. Furthermore, over the next ten years, broadband is expected to usher in a new era of personalised television — in which specialised broadcasts (such as personal pensions advice programmes) can be made available on demand. The observations in this paper are mainly drawn from the UK, where digital television penetration is high; the lessons can be applied more broadly, however, and are relevant to any organisation thinking of promoting its service through entertainment channels.     

城市商业中心地的形成与发展研究

在现实生活中,城市不同等级商业中心地的形成与发展主观上似乎遵循着某种规律,而客观上又呈现出无规则分布的特征.在城市不同等级商业中心地形成与发展过程中,有两个关键性因素,即交易成本和徒劳交易系数.这两个因素的变化情况,影响和制约了城市不同等级商业中心地的形成和发展.因此,在城市商业中心地的建设以及促进城市交易的活动过程中,节省交易成本支出、降低徒劳交易系数的制度安排、经营环境和信息流通空间就是非常重要的.     

新型耐腐蚀水环真空泵防腐防爆性能突出

由酚醛玻璃纤维增强塑料热压成型生产的耐腐蚀水环式真空泵是一种新型的耐腐蚀真空设备,它比普通水环式真空泵耐腐蚀效果理想,并且不易造成泵轴扭断,维修量小,节电效果显著,是一种值得广泛推广的真空设备。