降低电网企业垄断程度的改革策略分析

电网一般认为是自然垄断经营的.降低电网垄断经营的主要手段之一是输配分开.输配分开是我国电力体制改革存在争议的热点问题,具有较高的改革成本和风险.分析了自然垄断行业的模拟竞争,提出模拟竞争是在自然垄断行业引入竞争的主要方式;通过总结分析国外改革情况,提出输配分开并不是电力改革的必然选择;全面分析了输配分开的改革成本和改革风险,如输配电界限的动态变化、降低电网经营的规模效益等,指出了输配分开的改革成本和改革风险;最后分析了输配分开的期望效益.     

股指期货对现货市场的信息传递效应分析

本文研究了股票指数合约的交易对现货市场的影响以及股指期货是否有助于现货市场在信息传递速度与效率方面的提升.利用了GARCH模型,修正GARCH模型,TGARCH模型及极端值模型,通过对香港恒生H股指期货合约引入前后样本的实证分析发现,在期货合约未上市前,波动性干扰反应在时间上的持续性效果较持久.反之,在股价指数期货合约推出后,可以观察到波动性干扰因子的影响会更快速的反应到经济体系中,显示此时的波动过程更趋稳定.由此推论出期货交易的进行加速了信息传递的效率.亦即开放期货合约的交易,对于其标的现货市场的信息传递以及市场波动性,皆具有正面的贡献.     

Rural labour market policies in Croatia,FYR of Macedonia and Turkey

Considerable differences are found among countries regarding the importance of the agricultural labour force, between rural and urban labour, and in poverty and living conditions in rural areas. Declines in the agricultural labour force and rural population are foreseen for each of the countries, but with significant variations between them. Showing different patterns over time, labour market developments in the sector and in rural areas have been shaped by the overall labour market institutions, conditions and factors in each country, such as the legal basis, educational attainment and migration flows, and the presence of non-agricultural activities in rural areas.     

Equilibrium in a reinsurance market with short sale constraints

Summary. This paper deals with the existence of equilibrium in a dynamic reinsurance market with short sale constraints, driven by a marked point process, as studied in Bernis and Jouini (2001). We use the set of reinsurance treaties as consumption set, which is the positive orthant of some Banach lattice that can be identified to a space of martingales, . The properness of preferences is a key assumption for us to prove the existence of an equilibrium. We provide a sufficient condition for the preferences to be proper in term of loading factor of the reinsurance premium. Received: June 15, 2000; revised version: May 17, 2001     

Information on sellers and buyers characteristics: added value to explain price formation at primary fish markets in managed French scallop fisheries

The aim of this article is to explore, through a hedonic approach, the factors that might explain the price variability for the French-managed fishery of scallop at primary fish markets. In addition to factors classically identified in the current literature like intrinsic product characteristics or markets situation, the characteristics of operators are tested. The relationships of loyalty between sellers and buyers, and market assiduity are notably considered.     

EDGAR on the internet: The welfare effects of wider information distribution in an experimental market for risky assets

Policies such as the SEC’s Fair Disclosure Rule, and technologies such as SEC EDGAR, aim to disseminate corporate disclosures to a wider audience of investors in risky assets. In this study, we adopt an experimental approach to measure whether this wider disclosure is beneficial to these investors. Price-clearing equilibrium models based on utility maximization and non-revealing and fully-revealing prices predict that in a pure exchange economy, an arbitrary trader would prefer that no investors are informed rather than all are informed; non-revealing theory further predicts that an arbitrary trader would prefer a situation in which all traders are informed rather than half the traders are informed. These predictions can be summarized as “None > All > Half”. A laboratory study was conducted to test these predictions. Where previous studies have largely focused on information dissemination and its effects on equilibrium price and insider profits, we focus instead on traders’ expected utility, as measured by their preferences for markets in which none, half, or all traders are informed. Our experimental result contradicts the prediction and indicates “Half > None > All”, i.e. subjects favor a situation where a random half is informed. The implication is that in addition to testing predictions of price equilibrium, experiments should also be used to verify analytical welfare predictions of expected utility under different policy choices. JEL Classification D82, D53, G14, L86 This work was largely completed while this author was at The Hong Kong University of Science and Technology.     

中国转轨时期的市场机制与投资者保护

对市场机制的各个环节在中国股票市场发展过程中的作用的考察发现,市场机制所发挥的投资者保护作用是非常有限的.因此,应该通过内部治理机制和外部治理机制的完善,尤其是促进媒体作用的发挥来提高我国市场机制的投资者保护功能.     

企业套期保值研究及实证分析--基于基差复制技术的方法

文章针对企业套期保值过程中由于套保比率的设定以及入市点的错误选择使得企业面临亏损风险的问题而提出对策。笔者在套期保值比率问题上首次引入了寻找合理判断入市点的模型并给出了具体方法。利用金融工程中无套利的复制原理,复制出了一个远期的权益,从而得出了文章所认为的最优套保比率,为实务界经常运用的选择入市点问题给予理论支持。文章构建的模型得出,在套保比率的设定问题上不但要选择入市点,还要选择套保的时间因素。在买期保值上,当判断出市场行情有利时我们选择相对较大的保值比率,这样可以使我们能尽量获取基差上扬所带来的收益,另外又不至于把套保比率无限扩大使得套保变成投机,以防在万一出现行情错误的时候出现大幅亏损。在卖期保值上,当判断行情有利时,选择相对较低的保值比率,这样可以使我们能尽量获取基差下跌所带来的收益,另外又不至于把套保比率无限缩小甚至不保使得套保变成投机,以防在万一出现行情错误的时候亏损。     

义乌发展旅游的契机--会展旅游

在会展市场重心“东移”的国际大形势下,发展会展旅游为中国的旅游业创造了新的亮点。处于浙江中部的义乌市以小商品名扬天下,加上本身拥有丰富的旅游资源,较为完备的旅游接待设施,开展会展旅游不失为义乌市旅游业发展的契机。通过分析义乌会展旅游资源方面的优势和不足,提出开展会展旅游的可行性,探讨其适合的方式方法,并着重提出会展旅游可作为旅游业发展的突破口。     

关于编制"十一五"规划的几点见解

"十一五"规划编制的体制背景发生了根本的变化。传统计划经济下的计划以生产为中心,是配置社会资源的主要手段,所以计划不仅内容繁细,而且具有很强的指令性;市场经济下市场在配置社会资源中起着基础性作用,政府只是弥补或纠正"市场失灵"领域,并主要靠间接调控方式规范市场和引导企业。 因而,市场经济体制下的"十一五"规划必须突破传统计划理念,力求在体系、内容、重点、方法等方面有所创新。