Entry and Bidding in Common and Private Value Auctions with an Unknown Number of Rivals

In many procurement auctions bidders do not know how many rivals they face at the time that they incur the cost of preparing their bids. We show in a theoretical model that regardless of whether the procurement is characterized by private or by common values an increase in the potential number of bidders may lead to higher procurement costs. This raises potential policy questions of whether and how entry should be encouraged or limited in public procurement auctions. We use evidence from auctions of construction contracts to estimate the effect of an increase in the pool of potential bidders on entry and auction prices when entry and bidding decisions are made sequentially with no knowledge of the number or identity of the actual competitors.     

绿原酸提取工艺的研究进展

绿原酸是一种苯丙素类化合物,其提取工艺很多,各有特点。简要介绍了绿原酸的理化性质和生物活性,综述了近年来绿原酸几种提取工艺的研究进展,并对其作了简要比较分析,着重讨论了绿原酸提取工艺中存在的问题,探讨了其今后的发展方向,旨在为绿原酸的开发利用提供参考。     

回归正交法优化杜仲叶中绿原酸提取工艺研究

以杜仲叶为原料,在正交试验基础上,采用二次回归正交试验,优化了微波辅助提取杜仲叶中绿原酸的工艺条件。结果表明,最佳工艺条件为浸提温度61.71℃、乙醇质量分数为74.82%、pH为6、液料体积质量比为30.50 mL/g、提取时间为25 min,在此条件下,绿原酸提取率为4.578 6 mg/g。     

奥运会与北京城市建设

举办奥运会给首都城市建设带来良机和新要求,最近几年,依照新北京、新奥运要求,实践绿色奥运、科技奥运、人文奥运理念,首都在城市道路、公用事业、房地产开发、城市市容、古都风貌保护和奥运专项工程等方面取得了很大进展,首都已经成为一座传统与现代相结合的国际大都市.     

山地工业园综合生态环境规划设计研究——以贵阳市沙文科技产业园为例

通过比较与实证研究,探讨山地工业园区生态环境的规划设计方法.研究表明,园区建设用地应该是"图",而自然生态环境就是这张图的"底",是园区发展的生命支撑系统."图"和"底"之间的耦合方式,决定了土地资源利用的科学性与经济性.通过对区域要素、自然要素、瓶颈要素的综合分析,进行生态敏感性研究和生态网络构建,用以确定园区建设中不可动的"底",从而引导生态环境的建设.     

我国股市资金流动速度分析

流动性是衡量股市成熟与否的重要标准之一,也是决定股票市场行为的一个重要因素,而股市资金流动速度又是衡量股市流动性高低的重要指标.上海、深圳证券交易所股票换手率远远高于其他国家,这反映了我国股票市场中货币资金的流速很快,表明我国股市的投机性远远高于世界其他成熟市场.随着股票市场的发展,我国股市资金的流速将呈现下降后缓慢回升的趋势,最终稳定在一个区域内进行波动.     

Are high‐performance work practices (HPWPs) enabling or disabling? Exploring the relationship between selected HPWPs and work‐related disability disadvantage

We develop the organizational characteristics element of Stone and Colella's (1996) framework by drawing on the Ability–Motivation–Opportunity (AMO) model to assess the relationship between high‐performance work practices (HPWPs) and work‐related disability disadvantage. We develop competing “enabling” and “disabling” hypotheses concerning the influence of selected HPWPs (competency testing, performance appraisal, individual performance‐related pay, teamworking, and functional flexibility) on disabled relative to nondisabled employees. An empirical assessment of these competing hypotheses using matched employer–employee data from the nationally representative British Workplace Employment Relations Study 2011 reveals a negative relationship between these HPWPs when used in combination and the proportion of disabled employees at the workplace, although this relationship disappears in workplaces with a wide range of disability equality practices. While disabled employees report lower work‐related well‐being than their nondisabled counterparts, we find limited evidence that this is associated with the presence of HPWPs.     

研发项目风险的变化规律及转化关系研究

研发项目风险具有双重性,其表现出信息递减规律与收益平衡规律;研发项目技术风险、管理风险与经济风险之间存在着相互关联、相互转换关系.基于研发项目风险的规律性的认识以及风险关联性与转化性的把握,可以为风险管理创新提供依据.系统的复杂理论、全面干预理论的方法论以及柔性转换管理战略适应于研发项目的风险管理.     

发展跨国公司研发机构 增强中国自主创新能力

中国面临着产业升级的巨大压力,出路在于自主创新.在全球科技资源流动加大的背景下,发挥跨国公司研发机构的作用,有利于增强自主创新能力.垮国公司可以在技术的引进消化吸收再创新、集成刨新和原始创新过程中发挥作用.同时,不仅要在工程技术创新方面发挥跨国公司作用,还要重视商业模式创新方面发挥跨国公司作用,提高创新速度和效率,提升技术产业化水平.当然,在把跨国公司研发机构纳入中国自主创新体系的同时,也应该意识到与跨国公司研发机构合作的局限性,应该根据国家利益明确核心技术范围,加强技术攻关和技术管理.     

浅谈邮政物流客户服务战略

为使邮政物流更好地应对市场竞争,最大限度地满足客户需求,文章分析了制定邮政物流客户服务战略的意义,探讨了可供借鉴的客户战略及制定邮政物流客户服务战略的步骤。