Gender variation in the antecedents of task advice network size: Organizational tenure and core self-evaluations

Research finds gender differences in the size, quality, and consequences of social networks in the workplace. Building on these studies, we focus on one type of social network: task advice networks, which we define as the networks that act as conduits for information and knowledge directly related to work task completion. Using data on over 1300 employees, we test the relationships between task advice network size and two variables – organizational tenure and core self-evaluations, examining differences by gender. We find a larger positive association between core self-evaluations and task advice network size for men than for women. Additionally, we find that men, but not women, have larger networks when lower in tenure.     

A unified approach to restricted games

There have been two main lines in the literature on restricted games: the first line was started by Myerson (1977) that studied graph-restricted games an the second one was initiated by Faigle (1989). The present paper provides a unified way to look on the literature and establishes connections between the two different lines on restricted games. The strength and advantages of this unified approach becomes clear in the study of the inheritance of the convexity from the game to the restricted game where an interesting result by Nouweland and Borm (1991) on the convexity of graph-restricted games is turned into a direct consequence of the corresponding result by Faigle (1989), by means of this relation. This revised version was published online in June 2006 with corrections to the Cover Date.     

电子商务中的物流服务采购政策研究

自营物流服务还是外购物流服务,是电子商务中企业采购政策的一个重要方面。本文阐述了电子商务中物流服务采购的必要性和物流服务采购的两种基本方式,开创性地提出了基于企业核心能力的物流服务采购决策标准,解决了电子商务中企业是否应该采购物流服务,和以什么标准决策采购物流服务,以及采用何种采购方式等理论问题。     

实现共同富裕：社会主义社会的重要价值

中国特色社会主义共同理想既有真理性又有价值性。第一,社会主义性质的社会制度是在社会生产力已发展到较高水平的基础上建立起来的,所以在社会主义社会中能够创造出越来越丰富、高级的社会财富,满足人民大众希望不断提高生活水平的要求。第二,社会主义制度是坚持生产资料公有制的主体地位,大力发展公有经济的社会制度,所以在社会主义社会中能够实现让人民大众逐渐地富裕起来。中国人民追求实现共同富裕,需要经历一个相当漫长的历史过程。我们应当坚持社会主义理想,积极推动生产力的发展和社会主义制度的完善。只要坚定地沿着中国特色社会主义道路走下去,我们一定能够越来越接近共同富裕的甩标,我们的社会主义理想一定能够圆满实现。     

责任伦理：社会主义核心价值体系构建的合理性基础

核心价值体系作为社会基本价值关系的观念呈现,是人作为社会存在的本质在价值观念的自觉重构,也是当前社会主义市场经济对人的全面发展的新要求。责任伦理作为实践主体的伦理自觉,符合核心价值体系建设的要求,与核心价值体系正相契合。因此,成为核心价值体系构建的合理性基础。     

我国核心通货膨胀的实证比较研究

 本文对比研究了5种度量方法下的核心通货膨胀序列，发现不对称截尾法、中位数法得出的序列受食品类权重过大的影响，不适合作为我国的核心通货膨胀指标；对不对称截尾法、剔除法、共同趋势法和结构向量自回归法产生的序列的进一步研究中，发现它们都与CPI序列一样是一阶平稳的，虽然它们与CPI的相关系数很大，除了30%比率截尾平均法外，与CPI不存在协整关系；因果检验表明，除共同趋势法的序列是CPI的原因外，其余序列的因果关系不是很明确，但是都能在一定程度上预测CPI。     

Distance-Based Measures of Association with Applications in Relating Hyperspectral Images

We propose a distance-based method to relate two data sets. We define and study some measures of multivariate association based on distances between observations. The proposed approach can be used to deal with general data sets (e.g., observations on continuous, categorical or mixed variables). An application, using Hellinger distance, provides the relationships between two regions of hyperspectral images.     

Counting certain binary strings

Consider a sequence of exchangeable or independent binary (i.e. zero-one) random variables. Numbers of strings with a fixed number of ones between two subsequent zeros are studied under an overlapping enumeration scheme. The respective waiting times are examined as well. Exact probability functions are obtained by means of combinatorial analysis and via recursive schemes in the case of an exchangeable and of an independent sequence, respectively. Explicit formulae for the mean values and variances of the number of strings are provided for both types of the sequences. For a Bernoulli sequence the asymptotic normality of the numbers of strings is established too. Indicative exchangeable and independent sequences, combined with numerical examples, clarify further the theoretical results.     

Simultaneous Logit-Based Confidence Intervals for Odds Ratios in 2 × k Classification Tables with a Fixed Reference Level

In this article, we consider the problem of constructing simultaneous confidence intervals for odds ratios in 2 × k classification tables with a fixed reference level. We discuss six methods designed to control the familywise error rate and investigate these methods in terms of simultaneous coverage probability and mean interval length. We illustrate the importance and the implementation of these methods using two {\sc hiv} public health studies.     

Efficient initial designs for binary response data

In this paper we introduce a binary search algorithm that efficiently finds initial maximum likelihood estimates for sequential experiments where a binary response is modeled by a continuous factor. The problem is motivated by switching measurements on superconducting Josephson junctions. In this quantum mechanical experiment, the current is the factor controlled by the experimenter and a binary response indicating the presence or the absence of a voltage response is measured. The prior knowledge on the model parameters is typically poor, which may cause the common approaches of initial estimation to fail. The binary search algorithm is designed to work reliably even when the prior information is very poor. The properties of the algorithm are studied in simulations and an advantage over the initial estimation with equally spaced factor levels is demonstrated. We also study the cost-efficiency of the binary search algorithm and find the approximately optimal number of measurements per stage when there is a cost related to the number of stages in the experiment.