The Value of Safety as Revealed in the Swedish Car Market: An Application of the Hedonic Pricing Approach

In this article the hedonic regression technique is used to estimate the value of traffic safety, using information from the Swedish market for automobiles. The results from the study show that the market price of an automobile is negatively correlated with its inherent risk level, i.e. Swedish car consumers pay a safety premium for safer cars. In comparison to previous Swedish stated-preference studies, this study reveals a lower willingness to pay for additional car safety, which might be a result of the interaction between government interventions and individual self-insurance and self-protection.JEL Classification: C51, D61, J28     

古典所有制形式与古代雅典人的日常生活

古代雅典人始终过着比较简朴的生活 ,这与他们维持了古典所有制形式及相对均等的分配原则密不可分 ,而捐助制度是其保证社会财富不向一端聚集的有效措施。     

试论劳动价值论的适用范围

劳动价值论在解释现实经济现象时存在一定的困难 ,不是劳动价值论自身逻辑和体系问题 ,而是劳动价值论所研究的价值理论与价格理论、分配理论有联系也有区别 ,劳动价值论有其自身的适用范围 ,必须科学界定劳动价值论的适用范围 ,从历史唯物主义和经济学的角度重新认识劳动价值论的科学性和伟大意义     

物流产业问题研究综述

目前 ,物流产业已成为继制造业和商业之后的第三利润源 ,作为一个专门的产业加以开发。现代物流产业具有大跨度性、动态性、可分性和复杂性的特征。我国物流产业尚存在观念落后、设施陈旧、发展不平衡、物流业与电子商务脱节、人才短缺、技术单一、缺乏规模效应等问题。我国要大力发展第三方物流。我国的物流产业必将朝着国际化、电子化、共同化、专业化、个性化、信息化的方向发展     

蒸汽在水下有限空间内喷注时喷注噪声的声源分析

在实验研究的基础上，用计算流体力学软件(CFD)对与喷注噪声密切相关的压力场与温度场进行数值计算，定量分析了在不同温度时所对应的压力场与喷注噪声的关系。     

私募股权投资基金、董事会特征与企业经营绩效

在私募股权投资基金快速发展的今天,其能否改善支持企业公司治理,提高企业经营绩效成为业内关注的重点。本文以中小板92家私募股权投资支持企业为样本,研究了这一问题,结果发现在私募股权投资支持企业中,董事薪酬与公司经营绩效正相关,董事会开会频率及杠杆水平与经营绩效负相关,而董事会规模、领导结构和董事持股比例与经营绩效并没有明显的相关性。     

国际海事惯例及其司法识别问题研究

国际航运业的发展源远流长,中国自改革开放以来逐步构建起了中国特色社会主义海商法律体系。作为法律体系补充的国际海事惯例日益受到重视,将国际海事惯例运用到国内司法活动的前置问题就是司法识别。司法识别包括程序方面的构造和实体方面的标准两大方面,程序构造和实体标准相辅相成、相得益彰,共同构成了国际海事惯例司法识别问题的完整体系。从宏观角度对国际海事惯例的司法识别问题进行制度化完善,将有利于其科学规范的适用,为航运业的健康和可持续发展提供强有力保障。     

FDI、经济增长与区域分布差异--对江苏、浙江分布差异的观察

外商直接投资（FDI）区位分布因素一直是学者研究的热点问题。在地理位置、市场规模、开放水平、劳动力素质和政策优惠水平相似的条件下,江苏、浙江两省的外商直接投资存量和流量均有较大差异,而利用当前的研究理论却无法解释这种差异。设置国有资本要素并将其引入实证后发现,江苏、浙江两省在 FDI 存量和流量上的差异是由于二者国有资本存量差异而导致的,即国有资本额度对促进FDI 流入具有显著的正向性。     

Sample Size Calculation and Blinded Sample Size Recalculation in Clinical Trials Where the Treatment Effect is Measured by the Relative Risk

In clinical trials with binary endpoints, the required sample size does not depend only on the specified type I error rate, the desired power and the treatment effect but also on the overall event rate which, however, is usually uncertain. The internal pilot study design has been proposed to overcome this difficulty. Here, nuisance parameters required for sample size calculation are re-estimated during the ongoing trial and the sample size is recalculated accordingly. We performed extensive simulation studies to investigate the characteristics of the internal pilot study design for two-group superiority trials where the treatment effect is captured by the relative risk. As the performance of the sample size recalculation procedure crucially depends on the accuracy of the applied sample size formula, we firstly explored the precision of three approximate sample size formulae proposed in the literature for this situation. It turned out that the unequal variance asymptotic normal formula outperforms the other two, especially in case of unbalanced sample size allocation. Using this formula for sample size recalculation in the internal pilot study design assures that the desired power is achieved even if the overall rate is mis-specified in the planning phase. The maximum inflation of the type I error rate observed for the internal pilot study design is small and lies below the maximum excess that occurred for the fixed sample size design.