非对称网络权力与产业网络的空间组织——以我国台湾地区流行音乐产业网络为例

本文探讨了产业网络中非对称网络权力的形成机理,构建了非对称网络权力与产业网络空间组织间相互关系的理论分析框架,并从我国台湾地区流行音乐产业网络案例的分析获得实践支撑。结论表明:在产业网络中企业因要素占有或支配能力差异,形成由技术权力区、渠道权力区和权力塌陷区构成的非对称网络权力,产业网络的组织层级与空间层级间呈现相互对应的海默关系,而企业空间组织行为的区位锚定效应进一步强化网络权力的非对称结构。     

A High‐Frequency Investigation of the Interaction between Volatility and DAX Returns

One of the most noticeable stylised facts in finance is that stock index returns are negatively correlated with changes in volatility. The economic rationale for the effect is still controversial. The competing explanations have different implications for the origin of the relationship: Are volatility changes induced by index movements, or inversely, does volatility drive index returns? To differentiate between the alternative hypotheses, we analyse the lead‐lag relationship of option implied volatility and index return in Germany based on Granger causality tests and impulse‐response functions. Our dataset consists of all transactions in DAX options and futures over the time period from 1995 to 2005. Analyzing returns over 5‐minute intervals, we find that the relationship is return‐driven in the sense that index returns Granger cause volatility changes. This causal relationship is statistically and economically significant and can be clearly separated from the contemporaneous correlation. The largest part of the implied volatility response occurs immediately, but we also observe a smaller retarded reaction for up to one hour. A volatility feedback effect is not discernible. If it exists, the stock market appears to correctly anticipate its importance for index returns.     

ASYMMETRIC INFORMATION AND EXCHANGE OF INFORMATION ABOUT PRODUCT DIFFERENTIATION

We introduce asymmetric information about consumers’ transportation costs (i.e., the degree of product differentiation) in the model of Hotelling. When transportation costs are high, both firms have lower profits with asymmetric information than with perfect information. Contrarily, if transportation costs are low, both firms may prefer the asymmetric information scenario (the informed firm always prefers the informational advantage, while the uninformed firm may or may not prefer to remain uninformed). Information exchange is ex‐ante advantageous for both firms, but ex‐post damaging if transportation costs turn out to be low. If the information is unverifiable, the informed firm does not represent a reliable source of information, since it always prefers to announce that transportation costs are high and there is no contract that induces truthful revelation.     

金融危机下国企多级委托代理链的思考与建议

拉动内需是金融危机环境下推动经济发展的可行方法,而国有企业在拉动内需环节上起到中坚作用。由此,国有企业的改革再次引起政府和学术界的重视,本文从委托代理的角度,剖析国有企业存在的问题,并对其问题提出了合理化的建议。     

非对称信息下第三方物流企业道德风险模型分析

本文基于信息经济学中的委托-代理理论,构建了第三方物流企业道德风险模型,定量分析了如何通过设立约束机制使货主利益得到有效保障,得出了有利于提高物流服务质量、水平的分析结论,最后提出了应在完善激励与监督机制、提高市场信息的透明度等方面,约束第三方物流企业败德行为的建议。     

International tourism demand and the business cycle

The focus of this study is on presenting causes and hypotheses for the existence of asymmetric income and price effects on tourism demand across business cycles. The theoretical assumptions were tested by analyzing tourism import demand in different source markets, drawing on econometric models that provide for the magnitudes of price and income effects either to vary depending on the phase of the business cycle or to remain stable across the business cycles. The major outcome of this study is that the general assumption in most of the tourism demand studies—i.e. that the income effects are symmetric—should not be expected to be automatically true for every source market.     

沪市主要板块指数市场波动实证分析

GARCH—M模型通常应用于预期收益与预期风险密切相关的领域，根据金融理论股票的风险越大，其收益也就越高，故可认为股票收益的指数变动依赖于一个常数。利用GARCH—M模型和E—GARCH—M模型对沪市主要板块指数进行实证分析。结果显示沪市重要板块指数日收益率存在信息非对称效应、高风险对应高回报。     

Bidding off the wall in common value auctions

This paper examines the practice of phantom bidding in common value auctions with asymmetric information. Unlike in private value auctions it is very difficult to profit from phantom bidding even if the auctioneer observes the number of interested bidders. We find that the auctioneer is worse off submitting low bids or mixing between his participation strategies. Phantom bidding can generate higher revenues if a single bidder with a high value estimate is likely to be present at the auction. Systematic observation of an isolated high estimate requires negative correlation across bidders’ information that is atypical in a common value environment.     

我国食品安全问题的管制经济学分析

管制经济学是经济学的一个重要分支,是解决市场失灵的有效手段之一。近年来,由食品安全问题引发的各种恶性案件不断发生,令人触目惊心。这是经济市场失灵在食品安全方面的具体表现。本文立足于政府管制理论,运用经济学的分析方法解释食品安全的外部性和信息不对称问题,重申市场自身调节的局限性,并由此得出政府进行适当管制的必要性,最后提出相应的政策建议。     

Do Monetary Unions Make Economic Sense? Evidence from the Scandinavian Currency Union, 1873–1913

Popular propositions as to what constitutes a successful single currency area are examined by looking at the Scandinavian Currency Union (1873–1913) formed by Denmark, Norway and Sweden. Applying a frequently used indicator of the desirability of monetary union, we study the symmetry of country-specific structural shocks (measured net of the non-Scandinavian influence) in these three countries. It is found that country-specific shocks are not highly symmetric. This conclusion is also supported by the absence of clear-cut differences between the pattern of structural shocks in Belgium and structural shocks in the Scandinavian countries. This suggests that the three Scandinavian countries did not form an optimum currency area during the period 1873–1913.
JEL classification : F 15; F 33; N 13