财务分析师盈宗预测精确度决定因素的实证分析

文章以2004-2005年的上市公司数据为样本，分析了我国财务分析师在预测上市公司未来盈余时影响其预测精确度的主要因素。研究发现，预测机构数量的增加、盈余可预测性以及信息披露质量的提高，将伴随着高的盈余预测精确度，而盈余波动程度越大、公司规模越大，预测的精确度则越低。同时，可预测性、盈余管理、盈余波动以及公司扩张速度对分析师的悲观预测有显著的影响，而可预测性、盈余管理以及公司规模则显著影响分析师对盈余的乐观估计。     

灰色预测算法在物流园区需求预测中的应用

对物流园区需求预测进行了系统分析,介绍了灰色预测算法,和物流园区腹地划分方法;结合连云港港口物流园区需求预测的实例进一步阐述了灰色预测算法在物流园区需求预测中的应用.     

中国石油产量的VERHULST模型的建立与分析

随着我国国民经济的快速发展,对能源的需求逐渐增大,尤其是对石油的需求逐年上升,石油的供应问题已成为普遍关注的问题。我国石油资源赋存条件差,石油增储难度大,大多数主力油田已进入中后期开采阶段,石油产量增产难度大。面对日益增加的石油需求,及时准确、科学地预测我国今后一段时期石油产量,对于制定石油需求和石油战略储备计划具有重要的现实意义。因此,根据我国石油产量变化特点,建立了Verhulst模型,经过检验,模型预测精度很高,并对2020年以前的石油产量进行了预测。     

Analysis and Forecast of the State of Environmental Protection in Russia

The main purpose of the present study is to analyse the emission dynamics of atmospheric and water pollutants in Russia and cost of their removal in the 1980s and early 1990s, and to forecast them by means of a Dynamic Input–Output Model according to different scenarios of future economic development till 1998. Main results of the work are:– methodological principles have been elaborated for singling out the environmental protection sector within the national economy;– a method has been offered for including the ecological block into a Dynamic Input–Output Model of the Russian economy;– a method of data preparation has been elaborated for the ecological block of the above-named model, the data base which characterizes the ecological situation in Russia has been formed and analysed;– calculations for 1994–1998 have been executed for forecasting the economic and ecological development of Russia using the above-mentioned model and the results obtained have been analysed. The results showed that if the existing tendencies towards low environmental protection capital costs remain the same, then the negative environmental impact will increase. In order to implement ecological programs and international agreements, to increase the proportion of removed pollutants, it is necessary to increase substantially expenditures on purifying water and air resources. The proportion of environmental protection investments in the total amount of the national economy capital costs should increase by up to 12–40% according to different scenarios of the economic development and different purposes of the environmental protection policy.     

史论结合原则在毛泽东思想概论教学中的应用

"史论结合"是提高毛泽东思想概论课程教学效果的重要方法.这一原则在课程中的运用是毛泽东思想的本质要求,是符合毛泽东思想概论课程教学目的和内容特点的,也有利于学生分析、解决问题能力的提高.     

风险资本规模与最优投资组合

对于任何一个风险投资基金来说,都涉及到投资组合规模问题。由于在投资策略中奉行积极干预的策略,风险投资家耗费了大量的精力和时间。因此,风险资本规模的扩大对风险投资家的投资结构可能会产生影响。这就引致出风险投资最优投资组合的问题,并涉及对风险投资收益率的影响。     

Managerial judgment and forecast combination: An experimental study

This paper examines the role of managerial judgment in forming a final forecast, or judging the achievability of a critical level of sales, when multiple forecasts or opinions are available to the decision maker. Several factors that can help improve the quality of human intervention are identified and incorporated in a decision aid. Experimental results show that aided combination can help the decision maker exploit her relevant private information and mitigate the generally observed negative effects of human intervention. Further, the results suggest that emphasizing expected sales, even when the organization is primarily interested in go/no-go decisions, helps improve performance. Several suggestions for future research are presented.

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