相关瑞利衰落信道下空时分组编码性能分析

目前对空时编码的研究大都是基于信道是独立的假设下进行的,然而在实际系统中独立性假设是不成立的。基于此,研究了信道的相关性对空时编码性能的影响。计算机仿真结果表明：由于衰落信道的相关性,系统性能有所下降,且系统性能关于相关系数存在“地板效应”,即相关系数小于某一数值时,对系统性能的影响较小;当大于此值时,系统性能就会急剧下降。     

契约型农产品营销渠道治理过程研究：收购商管理控制的中介作用

文章以渠道治理和管理控制理论为基础,从交易关系发展过程的视角,将管理控制作为渠道治理的过程机制,重点考察其在保障契约机制有效执行过程中的中介作用以及农户专有资产净投入对契约完备性与管理控制之间关系的调节影响。通过对来自参与订单农业的217份的农户调查数据进行分析发现：收购商的三种管理控制方式（结果控制、过程控制和能力控制）在契约完备性对农户绩效的提升过程中起到中介作用,过程控制也在契约完备性抑制农户投机行为的过程中起到中介作用。同时,研究证实了农户专有资产净投入高时,削弱了契约完备性对三种管理控制正向影响。     

Consumers' attitudes and intentions toward Internet-enabled TV shopping

An increasing number of households are equipped with Internet-enabled televisions (IETVs) that yield opportunities for online activities. This research contributes by investigating the motivational factors of consumers’ attitudes and intentions toward IETV shopping. A quasi-experimental study in the environmental context of a living room was designed to explore IETV shopping behavior. Findings indicate that utilitarian motivations are determined by characteristics of technology and hedonic motivations from the physical environment. Attitudes toward IETV shopping are primarily influenced by hedonic shopping motivations. Conclusions suggest that by providing an IETV shopping app, retailers would make online shopping more enjoyable and comfortable for consumers.     

非审计服务、盈余管理与审计质量——来自中国证券市场的经验证据

本文以2001～2004年A股上市公司为研究对象,在国内首次验证了会计师事务所向审计客户同时提供审计与非审计服务,是否会允许管理当局有较大的盈余操纵空间,以探讨非审计服务的提供是否会影响注册会计师独立审计的质量。实证研究结果显示:在我国,控制了其他影响因素后,非审计服务的提供与异常应计数正相关,但不具有统计显著性。这表明,在我国,没有证据显示,非审计服务会的提供会损害注册会计师审计独立性及审计质量。     

Interbank Relationships and the Credit Channel in Germany

A crucial condition for the existence of a credit channel through bank loansis that monetary policy should be able to change bank loan supply. This papercontributes to the discussion on this issue by presenting empirical evidence fromdynamic panel estimations based on a dataset that comprises individual balancesheet information on all German banks. It shows that the average bank reduces itslending more sharply in reaction to a restrictive monetary policy measure the lowerits ratio of short-term interbank deposits to total assets. A dependence on its size canonly be found if explicitly controlled for this dominating effect. Overall, the evidenceis compatible with the existence of a credit channel but the results indicate that it is weakened by the network structures that exist in the German banking system.     

IPO首日超额收益:基于抑价和溢价的研究综述

从一级市场抑价和二级市场溢价两个角度时IPO首日超额收益的相关研究进行了综述,并为我国IPO首日超额收益提供了新的解释.基于信息不对称,一级市场抑价解释认为IPO首日超额收益是发行抑价的结果,是对投资者面临的风险或者提供私有信息的补偿;在对称信息下,抑价是股权选择的一种均衡机制,也是发行人和投资者行为偏差的影响结果;基于行为金融,二级市场溢价解释认为噪声交易者的存在使IPO上市首目交易价格偏离了内在价值,产生了二级市场溢价.     

Sister Cities Flourish

Building sister city relation, also known as friendship city, is a common channel for cities in different countries to keep a closertie and communication. According to the statistics from China International Friendship Cities Association, up to the end of 2007, 1087 provinces and states and 314 cities from 120 countries in the world have found their sister cities in China. Among them, Japan has the largest amount of Chicapital history.     

分销渠道网络化变革及其作用机理研究

随着环境的变化,企业分销渠道正在变得更为灵活和能够更快地响应用户需求,而传统分销渠道的运作模式与特征显然很难满足分销渠道变革的新要求.现在的分销渠道日益演变成为一个跨越企业边界的网络组织,分销渠道网络化与分销网络的形成也逐渐成为分销渠道演化与变革的一个趋势,这种趋势是渠道系统内部与外部环境因素共同作用的结果.     

How important is the credit channel in the transmission of monetary policy in Mexico?

This article empirically examines the importance of the credit channel of monetary policy in Mexico for the period 2004–2013. We estimate a vector autoregressive (VAR) model to analyse the effects of a monetary policy shock on real output, and we also use a threshold VAR model to investigate asymmetric effects of contractionary and expansionary policies. The empirical results suggest that a contractionary monetary policy results in a fall in the supply of loans together with an increase in the spread between the lending and deposit rate. To the extent that some borrowers are dependent on bank loans for credit, the reduced supply of loans amplifies the effects of monetary policy on output associated with the traditional interest rate channel. Our results also suggest that the importance of the credit channel is larger for contractionary shocks than for expansionary shocks.