Characterization of bidding behavior in multi-unit auctions

This paper considers a very general class of single or multi-unit auctions of indivisible objects. The model allows for interdependent values, multidiminensional types and any attitude towards risk. Assuming only optimal behavior, we prove that each bid is chosen in order to equalize the marginal benefit to the marginal cost of bidding. This generalizes many existing results in the literature. We use this characterization to obtain sufficient conditions for truthful bidding, monotonic best reply strategies and identification results for multi-unit auctions.     

辐照食品鉴别技术现状及研究进展

以辅照食品检测方法的原理进行分类,综述了目前国内外辐照食品鉴别技术现状,比较分析了各鉴别技术的优缺点,并对鉴别技术的进一步发展作了展望。     

ETC中基于RFID的双标签汽车牌照自动识别系统研究

目的:设计适用于ETC中的汽车牌照自动识别系统。方法:分析原有ETC系统的工作原理和弊端与不足,提出了基于RFID双标签的汽车牌照识别系统。结果:从理论分析可以得出本文提出的方法可以有效的克服原有ETC系统中的问题———如牌照识别率太低和跟车干扰情况严重等。结论:本文提出的RFID双标签汽车牌照自动识别系统能有效克服原有ETC系统中的弊端和不足,有一定的实践应用价值。     

Identification and dimension of the NAIRU

In this paper, we have re-examined the identification of the NAIRU and presented a well-defined reduced form for analysing the equilibrium unemployment rate, using a cointegrated VAR model. We have stated that the NAIRU estimates using the conventional reduced form (or Phillips curve) models are misleading since the natural rate of unemployment cannot be considered as a fixed point calling for the ceteris paribus assumption for all the data involved. This implies that the NAIRU estimates are unable to provide valuable information on the labour market status.     

诱惑侦查合法性的阶段化认定： 日本经验与中国路径

日本对诱惑侦查的合法性认定采取主客观混合的阶段化判断标准,分为启动阶段的合法性审查和实施阶段的正当性审查,具有清晰的阶段化特征和鲜明的实践指引功能。相较而言,我国在诱惑侦查合法性认定的问题上,既存在由法律规定的模糊性所导致的概念范围不明、法律性质不清等问题,也存在过度重视判断标准中静态要素的设置,忽视对诱惑侦查的行为阶段进行区分的倾向。解决问题的出路是,在概念界定上应明确诱惑侦查作为事前侦查、任意侦查的法律性质,并以指导案例的形式对诱惑侦查的行为方式、合法性判断要素进行解释说明;在司法认定上应在肯定主客观混合标准的同时,对判断标准中的主观要素和客观要素进行动态审查,进而形成启动阶段合法性审查和实施阶段正当性审查的区分,以凸显判断标准的实践指引功能。     

包神铁路能力计算与瓶颈识别疏解研究

包神铁路基础设施不断完善,先进生产技术投入运用,已实现经济社会效益阶跃式发展,逐步成为神华煤炭运输通道的核心干线。包神铁路运能和运量矛盾突出,实时能力计算和瓶颈识别疏解亟待研究。采用分析计算法计算包神铁路能力,利用TDCS数据计算各区间通过的列车数量,车站咽喉区道岔、正线及到发线能力利用率等指标,识别和分析能力瓶颈,系统性地提出包神铁路能力瓶颈消解措施,为包神铁路运输能力科学利用和智能决策提供技术支持。     

THE NORMALIZED CES PRODUCTION FUNCTION: THEORY AND EMPIRICS

Abstract The elasticity of substitution between capital and labor and, in turn, the direction of technical change are critical parameters in many fields of economics. Until recently, though, the application of production functions with specifically non‐unitary substitution elasticities (i.e., non‐Cobb–Douglas) was hampered by empirical and theoretical uncertainties. As recently revealed, ‘normalization’ of production‐technology systems holds out the promise of resolving many of those uncertainties. We survey and assess the intrinsic links between production (as conceptualized in a production function), factor substitution (as made most explicit in Constant Elasticity of Substitution functions) and normalization (defined by the fixing of baseline values for relevant variables). First, we recall how the normalized Constant Elasticity of Substitution function came into existence and what normalization implies for its formal properties. Then we deal with the key role of normalization in recent advances in the theory of business cycles and of economic growth. Next, we discuss the benefits normalization brings for empirical estimation and empirical growth research. Finally, we identify promising areas of future research.     

铅冶炼生产的安全规范和管理提升

本文阐述了铅冶炼生产活动中潜在的涉及人身、设备、产品、运输、起重安全的各种危险因素,旨在建立预防性安全健康管理体系,降低或控制事故风险,使生产过程在符合安全生产要求的物质条件和工作秩序下进行,避免设备设施、环境免受损坏,防止人身伤亡、财产损失等生产事故发生,使生产始终处于有效控制状态,切实保护劳动者的生命安全和身体健康,保障生产经营活动顺利进行。     

复合乳酸菌发酵番茄汁菌种鉴定及发酵工艺优化

本文以加工番茄为原料,模拟工业生产工艺制备番茄汁,添加从酸奶中分离鉴定所得菌种,驯化制成复合发酵剂,研究优化发酵番茄汁的加工工艺.发酵菌种鉴定结果为植物乳杆菌和嗜热链球菌.采用单因素试验和正交试验,结合感官评价法优化获得了制备发酵番茄汁的最佳工艺:白砂糖添加量10%、发酵时间14 h、发酵剂添加量1‰、发酵温度37%,发酵终点PH值3.96.     

Tax multipliers: Pitfalls in measurement and identification

To analyze the pitfalls in measuring and identifying tax shocks, we build a novel value-added tax rate dataset for the period 1980–2009. The problem of identification (i.e., changes in tax policy not triggered by output fluctuations) is clearly disentangled from the problem of measurement (i.e., finding a tax policy variable under the direct control of policymakers). On the identification front, our results favor the use of narratives à la Romer and Romer (2010). On the measurement front, our findings support the use of tax rates as the true measure of tax policy as opposed to revenue-based measures, such as cyclically adjusted revenues.