多信道应答机信道增益的附加余量

本文指出了多信道应答机信道实际增益的影响因素，提出了多信道应签机信道增益的附加余量，为今后改进应答机信道设计方法提供了某些参考。     

绝对离差风险测度模型与均值方差模型的比较研究

本文将绝对离差风险测度模型与马科维兹均值方差模型进行比较研究。分析它们之间的关系及各自的优越性；通过引入两种模型的估计误差、两种模型估计错误的机会成本等概念．在小样本股票组合下，比较了两种风险测度模型的有效边界、两种风险测度模型产生估计误差的大小以及产生估计错误的机会成本大小等。研究结果表明，在不同的股票组合样本大小下．两模型的性质和各自的优势会有一定的差异。     

平台研究：前沿演进与理论框架——基于CiteSpace Ⅴ知识图谱分析

数字化技术驱动商业社会进入平台经济时代,而平台被认为是企业管理的基础写照，且越来越成为企业转型升维之道和竞争优势之源。利用CiteSpaceV科学计量工具，通过绘制可视化知识图谱，采用计量综述和系统综述相结合的方法，探寻了平台研究的关键文献，展示了研究热点演进轨迹，搭建了平台研究整体理论框架，最后展望了中国情境下的平台研究。研究发现，平台研究主题经历了从技术管理平台产品创新、架构创新，到产业组织经济学的平台定价、双边市场，再到战略管理平台设计、商业模式的演变，并且交叉融合趋势明显。此外，平台理论框架可分为核心特征、理论基础和研究方法三大层次。     

Pension wealth and household savings in Europe: Evidence from SHARELIFE

We use recently collected retrospective survey data to estimate the displacement effect of pension wealth on household savings. The third wave of the Survey of Health, Ageing and Retirement in Europe, SHARELIFE, collects information on the entire job history of the respondent, a feature missing in most previous studies. We show that addressing measurement error problems is crucial to estimate the displacement effect when using survey data. We find that each euro of pension wealth is associated with a 47 (61) cent decline in non-pension wealth using robust (median) regression. In the presence of biases from measurement errors and omitted (unobserved) variables, we estimate a lower bound to the true offset between 17% and 30%, significantly different from zero. Instrumental variables regression estimates, although less precise, suggest full displacement.     

Measuring the hedonic and utilitarian dimensions of attitudes toward product categories

A bidimensional (hedonic/utilitarian) approach to understanding consumer attitudes was recently introduced by Batra and Ahtola (1991); they reported three construct validation studies and proposed a set of items to measure the construct(s). In the present paper, the Batra and Ahtola (1991) scales are applied to a wide variety of product categories. Results of the present series of measure validation studies suggest that there are hedonic and utilitarian elements comprising attitudes toward product categories and that, although problematic, the Batra and Ahtola (1991) scale items are a useful first step in measuring these components.     

Preparing industrial suppliers for customer integration

In real world markets and business markets in particular, the idea of customized products and services receives increasing attention. A management tool called customer integration has been developed as an approach to master the challenges originating from customization for a supplier. Customer integration competence is the organizational quality that results from this tool after being implemented. Putting this together, we can hypothesize a causal relation between customer integration competence and market success. In order to confirm this hypothesis, the paper presents a conceptualization of customer integration competence. To accomplish this, references are made to competence models from psychology, success factor research and organizational science. The concept was validated through a survey with 78 industry experts from business markets responding. Customer integration competence measured in this way was then contrasted to a second measure capturing market success. Regression analysis supports our hypothesis strongly. Finally, implications for marketing research as well as marketing practice are presented.     

Measurement: A Way Forward

Australia has a long tradition of using methods of valuation which depart from the traditional 'historical cost' model—and this has steadily been reflected in regulatory requirements and practices for different industries. However, while many forms of market value accounting have been introduced into a variety of accounting standards, the Australian Accounting Standards Board's conceptual framework (CF) has not led these changes, nor provided any substantive guidance on measurement issues. This article suggests criteria that can be used to select among accounting measurement alternatives.     

测量不确定度诠释

在《测量不确定度表达导则》(GUM)中所给出的定义是一个可操作性定义。然而,它与以下的定义从概念上说是一致的,即:由测量结果给出的被测量估计值中可能误差的量度;与测量结果一起表征被测量真值所处量值范围。     

关于建筑工程造价管理模式改革的探讨

本分析我国建筑工程造价管理的现状及历史沿革，指出工程造价管理中存在的几个问题。面对中国“入世”，国际竞争日益激烈的竞争，如何推进我国工程造价管理改革，让我国建筑业更好更快地融入全球经济，本进行了探讨并提出若干建议。