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.     

氧化微晶蜡生产的技术经济分析

简要介绍了微晶蜡氧化工艺及氧化微晶蜡产品特点，并对其进行了初步经济评价，同时对氧化微晶蜡下游产品如防锈蜡，乳化蜡及塑料润滑用蜡等进行了市场分析，最后给出了氧化微晶蜡下游产品生产的若干建议。     

花灯传奇

秀山花灯,起于唐,兴于宋,上千年的历史渊源,使秀山花灯在流传过程中,在得天独厚的生态土壤里,显示出一种民俗民间艺术的魅力。秀山花灯是重庆“十大民间艺术之一”。秀山土家族苗族自治县被文化部命名为“全国民间艺术之乡”。