Entry and growth in a perfectly competitive vintage model

A perfectly competitive vintage-knowledge model of Schumpeterian growth is introduced to study the relation between growth, technology-lifetime, entry, and productivity-dispersion. The incentive to innovate is generated by the productivity-dispersion (latent in traditional vintage models) between new and old plants, rather than by monopoly rents. The model has a unique steady-state REE with endogenous growth. The endogenous extent of entry constitutes a buffer, dampening the effect of research-efficiency and completely neutralizing the effect of population size or population growth rates on per-capita income levels and growth rates. Variations of research-efficiency lead to a negative relation between growth and vintage-lifetime and a non-monotonic relation between growth and productivity-dispersion.     

METROPOLITAN HOUSE PRICES IN SOUTH AFRICA: DO THEY CONVERGE?

The question this paper investigates is whether or not different metropolitan areas each constitute a separate housing market or whether or not there is a single South African housing market. Theory on the Law of One Price suggests that if products or geographic areas belong in the same market, their absolute prices must converge, so that their relative prices are stationary. By using cross-sectional time series data of five metropolitan areas, the paper tests for the Law of One Price by applying the Im, Pesaran and Shin panel unit root test. The paper finds strong evidence of convergence in large middle-segment house prices and weaker support for convergence in medium middle-segment house prices. In addition, the paper finds no evidence for convergence in small middle-segment house prices. This suggests the existence of a national market for large and possibly middle-segment houses in metropolitan areas, but separate metropolitan markets for small middle-segment houses. In addition, the paper estimates the speed of convergence and finds that large middle-segment house prices converge within two to seven quarters, while the speed of convergence for medium middle-segment house prices in three of the five areas is five to eight quarters.     

Hedging,Financing and Investment Decisions: A Simultaneous Equations Framework

We empirically investigate the interactions among hedging, financing, and investment decisions. We argue that the way in which hedging affects a firm's financing and investing decisions differs for firms with different growth opportunities. We find that high growth firms increase their investment, but not leverage, by hedging. However, we also find that firms with few investment opportunities use derivatives to increase their leverage.     

Technical Efficiency Estimates of Scottish Agriculture: A Note

Within the UK there has been a lack of studies of technical efficiency at the Scottish level. This note compares the results obtained using Scottish data with a recent study by Hadley [Journal of Agricultural Economics (2006) Vol. 57, pp. 81–100] for English and Welsh farms. Four major sectors are investigated, namely: (i) cereals, (ii) dairy, (iii) sheep and (iv) beef over the period 1989 to 2004. Some distinct differences in efficiencies, returns to scale and causes of efficiency are found.     

Technological innovation and real investment booms and busts

We investigate why new, high-risk technologies can attract excessive and often unprofitable investment. We develop an equilibrium model in which rational, risk-averse agents overinvest in a risky technology, possibly to the point that its expected return is negative. Overinvestment results from relative wealth concerns which arise endogenously from the imperfect tradability of future endowments. Competition over future consumption leads to an indirect utility for wealth with “keeping up with the Joneses” properties that can induce herding. Because overinvestment increases with the risk of the technology, our model can explain why new, risky technological innovations may promote investment bubbles.     

企业知识管理绩效综合评价案例研究

知识管理是现代企业管理的重要内容。正确分析和评价企业的知识管理绩效，对于促进企业知识管理、提高企业知识管理水平以及增强企业竞争优势，具有重要的现实意义。文章构建了企业知识管理绩效评价的指标体系，并运用模糊综合评价模型对企业知识管理绩效进行了综合评价。     

烯烃装置的绩效分析—一种微观经济的比较研究方法

所罗门管理咨询公司（SAI）是成立于1981年一家美国咨询公司，其经营特色是通过研究企业（客户）绩效确定其获得成功的关键因素，并通过同类企业绩效对比研究的方法，为企业（客户）指明改进绩效跻身先进的途径和措施，创建20年来以其独有的服务特色和经营理念赢得了广大客户，行业覆盖面由初始的炼油，扩大到目前包括石油，化工，造纸，汽车制造，运输，电力，银行等多个领域，成为在某些行业，特别是炼,石化行业颇具声誉的咨询机构，其中企业绩效分析评估更是该公司时间最久，又最具领先地位的核心业务，即以石化行业中的烯烃工厂为例，就已八，九十家作为客户参与其每二年一次的绩效分析活动，我国于1998年开始有一家参与了ASI的第7次全球烯烃绩效分析，参评情况当时就受到了业内领导层重视，以国于1998年开始有一定参与了SAI的第7次全球烯烃绩效分析，参评情况当时就受到了业内领导层重视，以后陆续又有多家企业参加，使这一方法在国内有愈来愈大的影响，希望了解并对此感兴越的人士也逐渐增多，为了实践本刊关注新热点的报道方针，本刊在2000年即着大的影响，希望了解并对此感兴越的人士也逐渐增多，为了实践本直关注新热点的报道方针，本刊在2000年邓着手组织有关这方面的搞件，本文即为其中之一，由于出版安排的原因（其中也有尽先刊载SAI作者来稿的考虑），延至本期才得以达览，而其间，应《 乙烯工业》要求，在该刊2001年第1期上先行发表，则是为了配合中石化集团公司七展烯烃装置绩效比较分析活动的需要，所作出的适应性调整而为之的，请读者谅察，同时本刊热希望并允迎已尼参与此项工作的科技，经济工作者，充分利用本刊这个载体，就绩效分析这个题目，与读者进行更具体，更务实的沟通与交流。所罗门管理咨询公司（SAI）的烯烃装置绩效分析方法是一种将同行各装置进行相对比较，然后确定各装置在其产的相对位置的方法，该方法与国内现行的竞争力分析方法相比更具科学性和可比性，此方法中包含了许多国内企业比较陌生的概念和做法，在此对该方法的特点，作用以及参评装置在提供数据时应注意的问题作了简单介绍，并以国内较早参与此项工作的J装置为例，介绍了该方法进行了情况。     

Corporate investment myopia: a horserace of the theories

This paper tests two theories of corporate investment myopia which predict a distortion in investment policy with respect to the standard net present value rule. The theories are confronted with the empirical evidence, allowing the theories to compete to explain investment behavior. Research and development expense is used to proxy for long-term investment in a pooled, cross-sectional time-series regression. I find that research and development expense is decreasing in the age of the Chief Executive Officer. Results are consistent with the hypothesis that agency costs are lower when the firm invests myopically, rather than follow a standard net present value rule.     

收购兼并在上市公司发展战略中的地位和实施策略

本文主要阐述了以下三个方面的问题：（1）公司为何及时从事购并交易；（2）如何使购并活动获得成功；（3）制定中国进行购并行动的战略。