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141.
Reiko Aoki 《Economic Theory》2003,21(2-3):653-672
We show how credible revelation and ability to commit to quality choice effect equilibrium qualities and welfare when product
market is either Bertrand or Cournot competition. We show that results depend on the type of competition but not generally
on the cost of quality function. We show that with Bertrand competition, the equilibrium qualities are lower with credible
commitment. Competition is moderated and producer surplus is higher and consumer surplus lower. With Cournot competition,
higher quality will be better but lower quality will be worse with credible commitment. Consumer surplus is always greater
with credible commitment and if cost does not increase too quickly with quality, producer surplus will also increase. Thus
credible commitment is a collusive device with Bertrand competition but it can improve social welfare with Cournot competition.
Received: February 8, 2000; revised version: February 14, 2002
RID="*"
ID="*" The idea of this paper originated in the weekly workshops of Mordecai Kurz at Stanford. I am forever in debted to Mordecai
and fellow students – Luis Cabral, Peter DeMarzo, John Hillas, Michihiro Kandori, Steve Langois, Patrick McAllister, Steve
Sharpe, Peter Streufert, Steve Turnbull and Gyu-Ho Wang – for their criticism and encouragement. I also benefited from comments
from Yi-Heng Chen, Jin-Li Hu, Kala Krishna, Jinji Naoto, Thomas J. Prusa, and Shyh-Fang Ueng at various later stages of this
work. Last but not least, I am grateful for the detailed comments of the referee. 相似文献
142.
Hiroyuki Nakata 《Economic Theory》2003,21(2-3):697-727
Summary. This paper studies how communication or exchange of opinions influences correlation of beliefs. The paper focuses on a situation
in which agents communicate with each other infinitely many times without observing data. It is an extension to the ‘Expert
Problem’ in Bayesian theory, where the informational flow is asymmetric. Moreover, this paper generalizes the existing literature
of communication that employs the common prior assumption (CPA) by allowing for heterogeneous beliefs. Some basic convergence
results are shown in contrast with the results obtained under the CPA. Furthermore, several economic implications of the basic
results are provided.
Received: August 27, 2001; revised version: April 16, 2002
RID="*"
ID="*" The results presented in this paper are taken from my Ph.D. thesis at Stanford University. I gratefully acknowledge
the inspiration obtained from innumerable discussions with Mordecai Kurz about this subject. Also, I appreciate comments from
Kenneth J. Arrow, Peter J. Hammond, Maurizio Motolese, Carsten K. Nielsen, Ho-Mou Wu and the anonymous referee. 相似文献
143.
Summary. A well-known result in the medical insurance literature is that zero co-insurance is never second-best for insurance contracts
subject to moral hazard. We replace the usual expected utility assumption with a version of the rank-dependent utility (RDU)
model that has greater experimental support. When consumers exhibit such preferences, we show that zero co-insurance may in
fact be optimal, especially for low-risk consumers. Indeed, it is even possible that the first-best and second-best contracts
are identical. In this case, there is no “market failure”, despite the informational asymmetry. We argue that these RDU results are in
better accord with the empirical evidence from US health insurance markets.
Received: February 26, 2001; revised version: October 4, 2002
RID="*"
ID="*"The authors would particularly like to thank Simon Grant, John Quiggin, Peter Wakker and an anonymous referee for valuable
comments and suggestions on earlier drafts. The paper has also benefitted from the input of seminar audiences at The Australian
National University, University of Auckland, University of Melbourne and University of Sydney. Ryan also gratefully acknowledges
the financial support of the ARC, through Grant number A000000055.
Correspondence to:R. Vaithianathan 相似文献
144.
Summary. All agents have the same ordinal ranking over all objects, receiving no object (opting out) may be preferable to some objects,
agents differ on which objects are worse than opting out, and the latter information is private. The Probabilistic Serial
assignment, improves upon (in the Pareto sense) the Random Priority assignment, that randomly orders the agents and offers
them successively the most valuable remaining object. We characterize Probabilistic Serial by efficiency in an ordinal sense,
and envy-freeness. We characterize it also by ordinal efficiency, strategyproofness and equal treatment of equals.
Received: October 5, 1999; revised version: December 20, 2000 相似文献
145.
In the mid-nineties FIFA decided to increase from two to three the number of points assigned to the winning team of a soccer
match played under traditional round-robin national leagues. Since a game of soccer can be regarded as a contest, FIFA's measure
provides an interesting case-study for analysing how a change in the system of rewards (from a zero to a non-zero sum rule)
may affect the contestants' equilibrium behaviour. In this paper we try to assess, both theoretically and empirically, whether
FIFA's new point rule has changed soccer towards a more offensive game, in which teams adopt more risky strategies. In particular,
we evaluate the “na?ve hypothesis” according to which the measure would induce every team to play always more offensively,
and we explore the extent to which the change in teams' behaviour may be affected by quality differentials between teams.
Our most important hypothesis is that when the asymmetry between opposing teams is large enough, an increase in the reward
for victory induces the weaker team to play more defensively, rather than the opposite. By looking at a subset of matches
held in the Portuguese first division league, which approximate the conditions of our model, we find support for this hypothesis.
First version received: July 1999/Final version received: May 2001 相似文献
146.
In the eco-environmental governance system,the compul-sive institutions are the most important as well as the mostcommonly utilized.A nation utilizes its administrative,lawand economic power to forbid,boost,bestir and help indi-viduals’behavior concerning environmental governance toensure the realization of eco-environment conservation.The fact,however,turns out to be disappointing about theimpulsive institution’s implementation.Actually,the unsatis-factory practices sometimes even lead to“… 相似文献
147.
泰山旅游需求时空分布规律及旅游者行为特征的初步研究 总被引:24,自引:1,他引:24
泰山旅游需求存在着明显的时空分布规律.调查显示.游人数量的日变化、周变化和年内变化十分显著;客源地主要分布于山东及其周边省市;旅游区内部以泰山中路和岱顶的需求强度最大。最后对旅游交通方式、旅游消费、旅客职业构成双重游率等旅游者行为特征进行了分析。 相似文献
148.
论人民币内外价值偏离 总被引:27,自引:0,他引:27
近几年来,人民币同时面临对外升值和对内贬值的双向压力。本文以“一价定律”为理论视角,分析了人民币内外价值偏离的表现及其危害,并从涉外经济政策层面探讨了内外价值偏离的深层原因,进而提出纠正人民币内外价值偏离的对策性建议。 相似文献
149.
岷江上游生态重建的模式 总被引:2,自引:0,他引:2
本文在分析岷江上游干旱河谷区生态环境问题的基础上,阐述了该区生态退化是脆弱的自然生态环境和人类的不合理经济营活动综合作用的结果,指出生态恢复与重建必须与经济建设紧密结合,走生态经济发展之路,将岷江上游干温河谷区划分为干旱河谷粮果林生态我,中山,亚高山林药菌生态林业区,高山灌丛草甸,草甸生态特业区,并提出了不同的生态经济类型区的生态恢复与重建模式,最后,论述了生态恢复与重建的工程措施,生物措施及管理措施。 相似文献
150.
Nigar Hashimzade 《Economic Theory》2003,21(4):907-912
Summary. In this paper I analyze the general equilibrium in a random Walrasian economy. Dependence among agents is introduced in the
form of dependency neighborhoods. Under the uncertainty, an agent may fail to survive due to a meager endowment in a particular
state (direct effect), as well as due to unfavorable equilibrium price system at which the value of the endowment falls short
of the minimum needed for survival (indirect terms-of-trade effect). To illustrate the main result I compute the stochastic
limit of equilibrium price and probability of survival of an agent in a large Cobb-Douglas economy.
Received June 7, 2001; revised version: January 7, 2002
RID="*"
ID="*" I would like to thank Mukul Majumdar and Thomas DiCiccio for helpful discussion and an anonymous referee for valuable
comments and suggestions. 相似文献