网络拍卖市场中成交价格的决定因素研究——卖家评级真的重要吗？

本文试图研究在中国网络拍卖市场上，拍卖成交价格的决定因素，尤其是卖家反馈评级的影响作用。本文采集了EBay中国上的170笔数码相机交易的数据，运用多元回归分析对假设进行了验证。本文研究结果表明：网上拍卖的成交价格会受到卖家评级的显著影响，好评对于成交价格有显著的正向影响，差评对于成交价格有显著的负向影响。但在忽略品牌因素时，卖家评级对于价格则不存在显著影响。     

Uniform price auctions and fixed price offerings in IPOs: an experimental comparison

We compare uniform price auctions with fixed price offerings in Initial Public Offerings (IPO) using laboratory experiments. The experimental environment is based on the Biais and Faugeron-Grouzet (J. Financ. Intermed. 11:9–36, 2002) model. Standard predictions based on tacit collusion equilibria (TCE) suggest lower revenues in uniform price auctions, although alternative equilibria allow for higher revenues. In our experiment, there is no evidence that TCE are played. The experiment suggests that the uniform price auctions are superior to fixed price offerings in terms of raising revenues.

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个人消费者网络虚拟团购模型构建及优化

本文在分析研究目前网上拍卖所存在的问题的基础上,构建了基于消费者采购目标的网络虚拟团购模型,在此模型中,个人消费者采购的产品的价格将大大降低,无论是企业消费者还是个人消费者都将享受数量折扣和累加数量的价格折扣,从而保证虚拟团购的顺利实施.     

拍卖经济理论综述

近 2 0年来 ,拍卖理论已经迅速发展成为经济学中最成功也最活跃的重要分支之一。在国内 ,政府与私人部门正与日俱增地通过拍卖机制采购或销售商品与权利。但拍卖从业界和经济学界对拍卖理论仍然相当陌生。为此 ,本文以基准拍卖模型和收入等价定理为起点 ,紧密围绕拍卖机制的绩效比较与最优拍卖机制设计问题 ,系统地介绍了近半个世纪以来国际拍卖理论的主要进展 ,同时展望其未来的发展轮廓并对这一前沿理论予以简要评述。①     

Setting the stage for successful electronic reverse auctions

Based on case survey data, this article provides a framework to help organizations evaluate if electronic reverse auctions (ERAs) are likely to be successful in terms of product cost reductions. The results of logistic regression and correlation analysis underline that it is vital that the product or service to be auctioned can be properly specified and that the companies must spend sufficient time and effort to carefully analyze, understand and, if possible, increase competition among suppliers participating in an ERA. Further recommendations how to instill competition are provided. Organizations should be aware of these conditions and focus purchasing measures prior to an auction accordingly.     

Revenue and optimality in unequal-sized share auctions

This paper analyzes unequal-sized share auctions with symmetric private-value buyers. The property that each buyer can win at most one unit, but variable-sized, makes share auctions situated between single-unit auctions and multiunit auctions. We calculate revenue and optimality of efficient share auctions and discuss how the optimal reserve valuation varies according to risk attitude towards share size.     

企业巨额竞价的应时性拍卖现象透析

本文通过分析企业巨额竞价的应时性拍卖的特点,剖析其对企业经营带来的收益,最后透视其给现代企业发展战略带来的挑战及冲击,并提出相关对策。     

基于两步分布协同拍卖的多机协同任务分配

针对多异构机载平台对不同类型的地面目标执行攻击任务的协同任务分配问题,以平台载弹量以及摧毁任务目标的需弹量建立平台与任务之间的关系,以各平台的任务序列以及执行任务时的武器使用量序列作为决策变量,在基地-任务航路矩阵和任务-任务航路矩阵的基础上,综合考虑平台武器约束、平台航程约束、任务需弹量等约束,建立多机协同任务分配模型。设计了两步分布协同拍卖算法,通过多次生成任务的拍卖招标顺序和基地的拍卖竞标顺序,实现了多机协同任务分配问题的优化求解。仿真结果表明,所建模型和求解算法能够有效合理地解决多机协同对地攻击的任务分配问题。     

What Is It About Organic Milk? An Experimental Analysis

Auction experiments were used to examine demand relationships and willingness to pay (WTP) for organic, rBST-free, no antibiotics used, and conventional milk. Elasticities showed strong substitute and complement relationships between organic, rBST-free, and no antibiotics varieties. The sum of the latter two's premiums were not significantly different than the organic premium, suggesting diminishing marginal utility for added attributes. Results from a two-stage heteroskedastic tobit model demonstrated that WTP premiums for the varieties differ significantly by demographics and beliefs regarding the conventional version. These suggest market segments for rBST-free and no antibiotics versions could succeed alongside organic, benefiting consumers and producers.