Evaluation method of benefits and efficiency of grid investment in China: A case study

The existing evaluation system for power grid investment in China has not combined measures of the investment benefits and investment efficiency very well and it lacks practical reference value. This article proposes an improved evaluation index system of the benefits and efficiency of power grid investment projects. The system divides the evaluation method into indexes. This includes the basic indexes, modification indexes, and appraisal indexes that evaluate the economic and environmental benefits of the investment projects comprehensively. It considers the overall efficiency in terms of the economy, technology, and society. It combines an absolute efficiency evaluation model with a data envelope analysis relative efficiency evaluation model. Finally, the benefits and efficiency of investment of an actual power grid project are evaluated through a case study. The results show the practical value of the proposed efficiency evaluation method for evaluating investment projects in a power grid.     

自然资源依赖对城乡收入差距的影响研究

［目的］针对全国31个省（市、区）（不含港澳台地区）、自然资源依赖度高的地区和自然资源依赖度低的地区，从整体和分区域研究自然资源依赖对城乡收入差距的影响，探究不同区域其影响程度的差异性，进而为弱化各区域城乡收入差距，解决由城乡收入差距拉大造成的各类社会矛盾具有重要的现实意义。［方法］从理论上分析了自然资源依赖对城乡收入差距的影响，并利用1999—2017年的省级面板数据，运用固定效应模型，从全国和分区域实证分析了自然资源依赖对城乡收入差距的影响。［结果］针对全国，自然资源依赖会拉大城乡收入差距； 分区域结果，针对自然资源依赖度高的地区，自然资源依赖拉大城乡收入差距； 针对自然资源依赖度低的地区，自然资源依赖对城乡收入差距影响不显著。［结论］为缩小城乡收入差距，需要降低经济体对自然资源的依赖，针对自然资源依赖度高的地区，政府通过将部分自然资源收益转化为农业创新基金和农村基础设施投入，促进自然资源收益向农村公共资本转化，完善现有的自然资源收益分配及转化制度； 鼓励资源型产业技术创新，加大研发投入，延长资源产业链； 加大农村教育投入、提升农村人力资本质量。     

高质量会计信息的重要意义

在现代经济社会,会计信息质量是会计工作的生命。会计信息失真就等于会计工作失去价值。目前,我国企业会计信息质量存在严重失真的现象,对我国国家经济政策的制定和宏观调控措施的执行、相关部门对企业的生产做出科学正确的判断产生了重大的危害。同时,会计信息的失真也助长了腐败行为,严重阻碍经济的发展和企业改革的顺利进行。影响会计信息质量的因素有很多,但是最根本的因素就是公司治理结构。     

新疆财政支持农业防灾救灾机制研究

财政是新疆农业防灾救灾的主体,防灾救灾机制决定了其效率.本文通过对新疆近年来财政支持防灾救灾机制的现状、问题的研究,提出如何建立适合新疆财政防灾救灾机制的对策建议.     

论生态经济系统稳态

本文论述了生态经济系统非平衡稳定态的概念、特性及其实现的途径。指出生态经济系统稳态,是非平衡的,对外全面开放、激烈竞争、充分利用涨落作用,对内协同、有序、自组织、自适应、自催化、且有非线性作用和支配性、良性运转、进展演替的耗散结构状态。生态经济系统平衡的提法应被生态经济系统稳态的概念所取代。     

浅谈集邮业务的个性化服务

文章回顾了我国集邮业务的历史演变和发展状况,分析了集邮业务的业务结构变化及其所带来的经营方式和经营策略的变化,提出个性化服务是集邮业务的发展方向,论述了个性化服务的社会需求、市场前景和发展空间,探讨了个性化服务的发展措施及经营思路。     

Pricing options using implied trees: Evidence from FTSE‐100 options

Previously, few, if any, comparative tests of performance of Jackwerth's ( 1997 ) generalized binomial tree (GBT) and Derman and Kani ( 1994 ) implied volatility tree (IVT) models were done. In this paper, we propose five different weight functions in GBT and test them empirically compared to both the Black‐Scholes model and IVT. We use the daily settlement prices of FTSE‐100 index options from January to November 1999. With both American and European options traded on the FTSE‐100 index, we construct both GBT and IVT from European options and examine their performance in both the hedging of European option and the pricing of its American counterpart. IVT is found to produce least hedging errors and best results for American call options with earlier maturity than the maturity span of the implied trees. GBT appears to produce better results for American ATM put pricing for any maturity, and better in‐sample fit for options with maturity equal to the maturity span of the implied trees. Deltas calculated from IVT are consistently lower (higher) than Black‐Scholes deltas for both European and American calls (puts) in absolute term. The reverse holds true for GBT deltas. These empirical findings about the relative performance of GBT, IVT, and Standard Black‐Scholes models are important to practitioners as they indicate that different methods should be used for different applications, and some cautions should be exercised. © 2002 Wiley Periodicals, Inc. Jrl Fut Mark 22:601–626, 2002     

“以大代小”火力发电企业的价值评估

在火力发电行业进行“以大代小”技改工程后,为了解决“一厂多制”的问题,需要对完成“以大代小”技改项目后所产生的新发电企业进行价值评估。在评估过程中,应明确价值类型,充分考虑租赁的资产、委托运行维护管理等要素对企业价值的影响。本文对大型火电发电机组的生命周期进行了分析,并在此基础上提出了对“以大代小”新火力发电企业进行收益测算的“三阶段测算模型”。