Queues with service speed adaptations

In this paper, we consider various queueing models in which the server can work at two different service speeds. The speed of the server depends on either the number of customers or the workload. Our main interest is in the model in which service speed adaptations can take place only at the arrival instants of an external Poisson observer. Using insightful probabilistic arguments, we give the structure of the steady‐state queue length and workload distributions in the various models. In addition, in case the service speed can only be adapted right after departure instants based on the number of customers, we provide explicit and intuitively appealing expressions for the steady‐state distribution of the number of customers present.     

Renewable energy innovations in Europe: a dynamic panel data approach

We investigate the determinants of renewable energy R&D intensity and the impact of renewable energy innovations on firm performance, using several dynamic panel data models. We estimate these models using a large data set of European firms from 19 different countries, with some patenting activity in areas related to renewable energies during the 1987 to 2007 period. Our results confirm our priors on the determinants of the rapid development of renewable energy R&D intensity during the past decades. Additionally, we find evidence that renewable patent intensity has a significant dynamic impact on the stock market value of firms.     

Similar bidders in takeover contests

When bidders in a corporate takeover have related resources and post-acquisition strategies, their valuations of a target are likely to be interdependent. This paper analyzes sequential-entry takeover contests in which similar bidders have correlated private valuations. The level of similarity affects information content of bids and bidding competition. Our model predicts that expected acquisition prices and the probability of multiple-bidder contests are the highest for intermediately similar bidders. We test these predictions in laboratory experiments in which we control the similarity between bidders. The experimental data confirm the non-monotonic effects of similarity on prices and on the frequency of multiple-bidder contents.     

论差异思想政治教育法

个体差异的存在是差异思想政治教育法的前提 ,马克思关于人的全面发展理论是差异思想政治教育法的理论依据。实施差异思想政治教育法应围绕个体差异测断 ,有的放矢和提高教育工作者素质来进行     

基于CA的产业集群升级决策过程建模分析

产业集群升级过程是一个复杂的过程,升级的涌现特性,随着产业集群系统的不断演化逐渐凸现。Hooland赋予了这个涌现过程成为:受限生成过程。在他的《涌现》一书中指明了,涌现的理论能够预言许多复杂的行为,同时也给予我们关于生命,智慧和组织的很多启示。升级过程经过在前面的涌现激励条件分析,企业之间的演化博弈分析之后,可以看出,结构效应,组成效应,规模效应,环境效应对于升级涌现的影响是显而易见的,那么其因素对于整个升级过程的影响程度如何表述出来呢?我们借助元胞自动机建模,并利用面向对象的JAVA语言实现整个过程的模拟实验,来分析,不同激励条件对于升级的影响。     

The Effects of Labour on Accounting Choice in Canada

This study examines the effects of labour considerations on accounting choice in Canada. Two potential labour‐related incentives are considered: ability to pay and employee attraction and retention. Measures of these incentives are developed based on Canadian data: unionization for ability‐to‐pay incentives, and labour intensity and the percentage of white‐collar employees for the attract and retain incentives. Our results indicate that ability‐to‐pay incentives, measured by unionization, are not associated with depreciation policies in Canada. In contrast, the findings provide mixed support for the attract‐and‐retain perspective, because labour intensity was significantly correlated with these choices, while the percentage of white‐collar employees was marginally significant.     

Organizational ownership,competitive intensity,and firm performance: an empirical study of the Indian manufacturing sector

Emerging countries are using privatization as a key strategy in their drive to become free market economies. Although these ownership changes are rapidly gaining prominence, the academic literature has been equivocal about the performance benefits of private vs. state ownership. The lack of clarity in findings can be largely traced to the underspecification of the models that prior studies have examined. Specifically, prior studies have mostly ignored the central role of competitive rivalry. This paper proposes a model that centers around the interactive, inseparable effects of ownership and competitive rivalry on firm performance. Results of the empirical examination set in India show that competitive intensity moderates the relationship between ownership and performance. Copyright © 2001 John Wiley & Sons, Ltd.     

中成药与辨证施治

本文简述了中成药的基本须知、辨证施治的含义、中成药与辨证施治的关系、中成药与西药联用时的禁忌范围,最后指出了加强中成药辨证运用的现实意义。     

我国家族企业用人制度的文化分析

我国家族企业用人制度上存在着典型的“家族化”、“关系化”特征,偏向于使用与企业主有血缘、宗亲等特殊关系的人员。本文从传统文化的角度,对以上特征做出解释,认为我国传统的社会低信任度文化和“差序格局”观念,是家族企业用人制度的,一种不可忽视的原因。     

A note on the maximum deviation of the scale-contaminated normal to the best normal distribution

In this paper we consider the case of the scale-contaminated normal (mixture of two normals with equal mean components but different component variances: (1−p)N(μ,σ²)+pN(μ,τ²) with σ and τ being non-negative and 0≤p≤1). Here is the scale error and p denotes the amount with which this error occurs. It's maximum deviation to the best normal distribution is studied and shown to be montone increasing with increasing scale error. A closed-form expression is derived for the proportion which maximizes the maximum deviation of the mixture of normals to the best normal distribution. Implications to power studies of tests for normality are pointed out. Received May 2001