排序方式: 共有68条查询结果,搜索用时 46 毫秒
41.
介绍了软交换技术特征及其体系架构组成,采用软交换技术的下一代网络提供的业务,从事软交换研究的国际组织及软交换技术发展中存在的问题。 相似文献
42.
Toshiji Miyakawa 《Economic Theory》2009,39(2):291-306
We provide the existence theorem of stationary subgame-perfect equilibrium (SSPE) in a noncooperative coalitional bargaining
game model with random proposers. Our model contains a bargaining situation where the coalitional game is nonsuperadditive.
We also provide a necessary and sufficient condition for the existence of a pure-strategy SSPE satisfying the efficiency property
when the discount factor is close to one. Furthermore, we provide examples where the delay in agreement occurs, even in a
random-proposers model, when the game is nonsuperadditive.
I am grateful to Akira Okada and an anonymous referee for their useful comments and helpful suggestions. 相似文献
43.
Harrison Cheng 《Journal of Mathematical Economics》2011,47(3):300-308
We show that when the weak bidder’s bargaining power in the resale market is weakened, the auctioneer’s revenue from the first-price auction with resale is lower. Using the idea of Coase Theorem, we show that when the resale market is a sequential bargaining model with no commitment, the auctioneer’s revenue is substantially reduced, and the ranking is the opposite of Hafalir and Krishna (2009). We establish a version of the Coase Theorem in the context of the auctions with resale. When Coase Theorem holds, we show that the revenue of the auction with resale is lower than the revenue of the same auction without resale. We also provide the existence and uniqueness of equilibrium for our model of auctions with resale. 相似文献
44.
John Duggan 《Journal of Mathematical Economics》2011,47(6):755-759
This paper disentangles the topological assumptions of classical results (e.g.,Walker, 1977 on the existence of maximal elements from rationality conditions. It is known from the social choice literature that under the standard topological conditions—with no rationality assumptions on preferences—there is an element such that the upper section of strict preference at that element is minimal in terms of set inclusion, i.e., the uncovered set is nonempty. Assuming the finite subordination property, a condition that weakens known acyclicity and convexity assumptions, each such uncovered alternative is in fact maximal. Implications are a generalization of a result of Yannelis and Prabhakar (1983) on semi-convexity, an extension of Fan’s (1961) lemma on KKM correspondences, and the existence of fixed points for subordinate convex correspondences generalizing the work of Browder (1968). 相似文献
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46.
We study contests in which there are multiple alternative public-good/bad prizes, and the players compete, by expending irreversible effort, over which prize to have awarded to them. Each prize may be a public good for some players and a public bad for the others, and the players expend their effort simultaneously and independently. We first prove the existence of a pure-strategy Nash equilibrium of the game, then establish when the total effort level expended for each prize is unique across the Nash equilibria, and then summarize and highlight other interesting and important properties of the equilibria. Finally, we discuss the effects of heterogeneity of valuations on the players’ equilibrium effort levels and a possible extension of the model. 相似文献
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48.
Domenico Colucci 《Research in Economics》2003,57(4):371-381
This note provides a direct proof of the fact that in a particular version of the overlapping generations model with long-lived agents and fiat money, there can be at most two stationary states. A simple argument showing the Pareto superiority of the low inflation steady state is also given. 相似文献
49.
Are There Income Effects on Global Willingness to Pay for Biodiversity Conservation? 总被引:2,自引:1,他引:1
This paper is concerned with the empirical relationship between biodiversity conservation values and income. We use random
effects panel models to examine the effects of income, and then GDP per capita, on willingness to pay for habitat and biodiversity
conservation. In a meta-analysis, 145 Willingness To Pay estimates for biodiversity conservation where existence value plays
a major role were collected from 46 contingent valuation studies across six continents. Other effects included in the meta-analysis
were the study year; habitat type; continent; scope as presented to respondents; whether WTP bids were for preventing a deterioration
or gaining an improvement in conservation, whether a specific species or specific habitat was protected; whether the questionnaire
used a dichotomous choice or an open-ended format; distribution format; and the choice of payment vehicle. GDP per capita
seemed to perform as well as an explanatory variable as respondent’s mean stated income, indicating that it is wealth in society
as a whole which determines variations in WTP. Even if large variation, our main conclusion is, that the demand for biodiversity
conservation rises with a nation’s wealth, but the income elasticity of willingness to pay is less than one. 相似文献
50.
李艳军 《吉林商业高等专科学校学报》2007,(2):35-38
我国具有丰富的旅游资源。近年来我国的旅游业迅猛发展,为国民经济添砖加瓦。与此同时,旅游业的发展也带来了许多问题。加大环境投资,建设度假旅游区,更深层次发展人文景观建设是解决问题的有效途径。完善与旅游服务相关联的各项配套设施,全面提高旅游业的服务质量,加强旅游法规建设是适应我国旅游业发展合理措施。 相似文献