Monotonicity of Rank Statistics in some Non–parametric: Testing Problems

For some non–parametric testing problems (one–sided two–sample problem, k –sample trend problem, testing independence against positive dependence) a partial ordering, denoted by ≥, over the alternatives is defined. This partial ordering expresses the strength of the deviation from the null–hypothesis. All familiar rank tests turn out to become more powerful under "increasing" alternatives; that is, all familiar rank statistics preserve the ordering stochastically in samples whenever it is present between underlying distributions. As a tool, the sample equivalence of ≥ is introduced as a partial ordering over pairs of permutations. Functions, defined on pairs of permutations, which preserve this ordering are studied.     

产权制度与财权配置--兼议公司财务治理中的难点与热点问题

文章通过对企业产权的再认识,重新界定了企业财产权属于"他物权"中"用益物权"的一种,是明显与"自物权--所有权"相分离的,公司中的财权在两个层面(自物权和他物权)上均有分布或配置.文中进一步阐述了财权的静态配置与资本结构的动态调整.认为:"财务治理结构"是一种静态的理解,具体表现为财权配置结构和利益关系.它是由两类财务治理主体、多维度的财务治理客体及一系列财务治理中的经济利益关系构成;而"财务治理"则是从动态上看,一方面表现为财权配置中的动态制衡和激励约束机制的形成,另一方面表现为新的债权人和投资人的加入--融资结构的形成以及对现有资本结构的调整和改善.文章第三部分专题讨论了当前在公司财务治理中的热点和难点问题,阐述了笔者关于独立董事、国企财务治理及财务总监制度的若干观点.     

Has Austria’s Accession to the EU Triggered an Increase in Competition? A Sectoral Markup Study

We estimate the pro-competitive effects of Austrias participation in the Single Market after its European Union (EU) accession in 1995 in terms of firms market power as measured by the Lerner index, using a sample of 46 industries and 7 industry groups, covering the period 1978–2001. In the framework of the markup estimation method suggested by Roeger (1995), we test for both an instantaneous structural break between 1993 and 1998 and also estimate logistic smooth transition models to take up the proposition that the regime shift is likely to have occurred gradually rather than as a big bang. In sum, the results provide no reason for being euphoric: Pronounced markup reductions were only found in three industry groups (mining and quarrying, wholesale and retail trade; financial services and real estate). At the more disaggregate level, the picture is mixed: Both increases and reductions in market power have been found.     

关于宏观调控若干问题的思考

宏观调控是一个中性概念。宏观调控本身就包含了限制与发展、紧缩与扩张、后退与前进几方面的内容。1992年正式提出向建立社会主义市场经济体制过渡以后，市场经济意义的宏观调控逐步走上历史舞台。从1993年到2003年，中国经济经过了紧缩性和扩张性两轮正相反的宏观调控。目前，中国经济进入新一轮的上升周期。此轮宏观调控转向“中性”政策。所谓“中性”政策，是相对于扩张性政策和紧缩性政策而言的，是一种有保有压、有紧有松、上下微调、松紧适度的政策。“软着陆”的经济含义是，国民经济的运行经过一段过度扩张以后，平稳地回落到适度增长区间。目前，中国的经济增长率和物价上涨率都在正常区间，所以整体上不存在所谓“软着陆”问题。     

地方财政体制权责不对称问题研究

地方财政体制权责不对称已经成为分税制后我国地方财政管理体制运行中的一个较为突出的问题。主要表现为：事权划分原则性不强且缺乏法制化基础导致了政府间事权下移，地方政府级次过多与“倒轧账”式的分税模式引起了地方政府间财权上移，转移支付制度不规范造成了地方政府间财力差距日益扩大。为此，我们应选择相应的治理对策来完善我国地方财政体制。     

集群式供应链的竞争力及培育分析

集群式供应链是产业集群和供应链之间的藕合组织形式。本文对集群式供应链这种新型的组织形式和集群式供应链的概念进行了阐述,并对其竞争力及其培育进行分析,为集群式供应链这种新型组织方式的构建研究奠定了基础。     

Network externalities and long-run market shares

We study a dynamic duopoly model with network externalities. The value of the product depends on the current and past network size. We compare the market outcome to a planner. With equal quality products, the market outcome may result in too little standardization (i.e. too many products active in the long run) but never too much. The potential inefficiency is non-monotonic in the strength of the network effect, being most likely for intermediate levels. When products differ in quality, an inferior product may dominate even when the planner would choose otherwise, but only if the discount factor is sufficiently large     

Price-Cost Margins and Profit Rates in New Zealand Electricity Distribution Networks Since 1994: the Cost of Light Handed Regulation

From 1994 to 2003, New Zealands corporatized electricity lines networks operated with no industry regulator, but under the spotlight of mandatory information disclosure. As a result there exists a large body of detailed, audited and publicly available accounting data on the financial performance of these businesses. Using that data, this paper finds that price-cost margins have widened substantially since deregulation. We estimate the extent to which light-handed regulation has allowed profits to exceed the levels which would have been acceptable under the old rate-of-return regulatory framework, and find that the answer is about $200 million per year, on an ongoing basis.We thank colleagues at Victoria University, and two anonymous referees for this journal, for constructive comments on this paper. Any remaining errors are entirely our responsibility.JEL classification: D21; K23; L11; L43; L51     

Two-settlement Systems for Electricity Markets under Network Uncertainty and Market Power

We analyze welfare and distributional properties of a two-settlement system consisting of a spot market over a two-node network and a single energy forward contract. We formulate and analyze several models which simulate joint dispatch of energy and transmission resources coordinated by a system operator. The spot market is subject to network uncertainty, which we model as a random capacity derating of an important transmission line. Using a duopoly model, we show that even for small probabilities of congestion (derating), forward trading may be substantially reduced, and the market power mitigating effect of forward markets (as shown in Allaz and Vila 1993) may be nullified to a great extent. There is a spot transmission charge reflecting transportation costs from location of generation to a designated hub whose price is the underlying for the forward contract. This alleviates some of the incentive problems associated with the forward market in which spot-market trading is residual. We find that the reduction in forward trading is due to the segregation of the markets in the constrained state, and the absence of natural incentives for generators to commit to more aggressive behavior in the spot market (the strategic substitutes effect). In our analysis, we find that the standard assumption of no-arbitrage across forward and spot markets leads to very little contract coverage, even for the case with no congestion. We present an alternative view of the market where limited intertemporal arbitrage enables temporal price discrimination by competing duopolists. In this framework, we assume that all of the demand shows up in the forward market (or that the market is cleared against an accurate forecast of the demand), and the forward price is determined using a market clearing condition.     

供应链竞争环境分析模型

本文将扩展后的波特模型用于分析供应链上几个连续环节组成的整体的竞争环境以及环节间的整合趋势。并采用新的模型分析了实现“厂网分离、竞价上网”改革后的电力供应链的竞争状态与发展趋势。