商业信息化与商业业态的演化

引入交易费用的概念解释商业业态的变迁，分析商业信息化条件下的各种交易方式的交易费用变化，以三种比较有前景的零售商业业态模式为例，分析其在新技术条件下的比较优势。     

上市公司审计委员会制度实施的制约因素分析

本文通过对影响我国上市公司审计委员会制度实施的因素进行实证分析后发现,要保证审计委员会制度得以全面建立并同时真正发挥其作用,不仅要得到国家法律法规的认可,更重要的是应彻底改变目前上市公司中普通存在的“一股独大”及“内部人控制”现象。     

Reduced Form Auctions Revisited

This note uses the Theorem of the Alternative to prove new results on the implementability of general, asymmetric auctions, and to provide simpler proofs of known results for symmetric auctions. The tradeoff is that type spaces are taken to be finite.     

财务会计概念框架的形式转换:冲突及其缓解--兼论《基本准则》的修订及其支撑系统的建构

现阶段我国理论界和准则制定机构主张采取先由<基本准则>充实概念框架部分内容,等到时机成熟后将<基本准则>转化为符合国际惯例的概念框架的两阶段形式转换策略有其合理性.然而,概念框架的理论实质与<基本准则>的会计法规形式之间必然面临冲突.文章分析了这种冲突形成的根源及其影响,并从<基本准则>的修订与支撑系统的建构两个方面提出了缓解上述冲突的一些对策.     

Regulation of Mobile Telephony across the European Union: An Empirical Analysis

In this paper I analyze the impact of regulatory policy on prices and demand for mobile telecommunications services across the European Union. I estimate a reduced form model of the mobile industry using panel data for the EU countries from 1998 to 2002. Among others, I find the following effects: liberalization of fixed telephone lines has a negative impact on prices and a positive impact on the demand for mobile services, and the introduction of mobile number portability has a negative impact on prices.*I am grateful to Toker Doganoglu, Gerd Hansen, Eric Kodjo Ralph, Guido Friebel, participants at the 30th EARIE Conference 2003, the 2nd International Industrial Organization Conference 2004 and the 19th Annual Congress of the EEA 2004, and anonymous referees for valuable comments. I would like to acknowledge the generous financial support from the Volkswagen Stiftung and the Munich Graduate School of Economics which made this research possible. All errors are mine.1 Source: European Commission (1994).     

Trees and decisions

Summary. The traditional model of sequential decision making, for instance, in extensive form games, is a tree. Most texts define a tree as a connected directed graph without loops and a distinguished node, called the root. But an abstract graph is not a domain for decision theory. Decision theory perceives of acts as functions from states to consequences. Sequential decisions, accordingly, get conceptualized by mappings from sets of states to sets of consequences. Thus, the question arises whether a natural definition of a tree can be given, where nodes are sets of states. We show that, indeed, trees can be defined as specific collections of sets. Without loss of generality the elements of these sets can be interpreted as representing plays. Therefore, the elements can serve as states and consequences at the same time.Received: 23 January 2003, Revised: 2 November 2003, JEL Classification Numbers: C72, D70. Correspondence to: Klaus RitzbergerWe are grateful to Larry Blume, Ariel Rubinstein, Jörgen Weibull, an anonymous referee, and seminar participants at the universities of Vienna, Salamanca, and Heidelberg for helpful comments. Financial support from the Austrian Science Fund (FWF) under project P15281 is also gratefully acknowledged.     

A theory of sequential reciprocity

Many experimental studies indicate that people are motivated by reciprocity. Rabin [Amer. Econ. Rev. 83 (1993) 1281] develops techniques for incorporating such concerns into game theory and economics. His theory is developed for normal form games, and he abstracts from information about the sequential structure of a strategic situation. We develop a theory of reciprocity for extensive games in which the sequential structure of a strategic situation is made explicit, and propose a new solution concept—sequential reciprocity equilibrium—for which we prove an equilibrium existence result. The model is applied in several examples, and it is shown that it captures very well the intuitive meaning of reciprocity as well as certain qualitative features of experimental evidence.     

会计盈余及时性对公司治理机制影响的实证研究

本文通过考查1997年到2004年间上市公司治理机制代理变量与会计盈余及时性指标之间截面数据相关关系,探讨治理机制是否随会计盈余及时性而变化。结果基本支持了本文的假设:董事对高成本信息收集和整理的需求与会计系统信息的有用性是倒数关系,外部股东对高成本信息收集和整理的需求与会计系统信息的有用性是正相关关系;会计系统信息有用性的重要决定因素是解释股权价值现时变化的程度;以高成本的监督活动为特点的特殊治理结构是股东和董事对高成本信息收集和整理需求的反应。     

新会计准则对上市公司信息披露的影响分析

本文在回顾我国会计准则变迁以及概括新准则主要变化的基础上,从内容和形式两个方面研究了新准则对上市公司信息披露的影响。认为新准则对信息披露的影响主要表现在财务报告的构成方面,财务报告的组成及其格式都发生了较大的变化。这些形式和内容上的变化使得新会计准则对上市公司的信息披露提出了更高的要求,上市公司信息披露的逐步完善将有助于投资者做出更准确的投资决策,降低投资风险,必将提高上市公司财务报告的使用价值,增强上市公司业绩的可预测性。     

利益相关者间的谈判与企业治理结构

企业的契约性与利益相关者理论具有一致性 ,它们都隐含了企业是一种再谈判机制。利益相关者对企业的所有权分配进行谈判 ,谈判结果决定出企业的治理结构。在这个过程中 ,各方的谈判破裂结果效用、谈判力和对谈判破裂的担心程度是关键变量。我们使用Nash谈判模型及其推广模型分析了这个过程。我们的结论是 ,企业治理结构是内生的 ,每个企业的治理结构都是特殊的个案 ,一种治理结构并不具有普适性。这个结论具有重要的立法含义。