从个人决策向决策科学化转型——中国民营企业实现可持续发展必须跨越的台阶

21世纪是以数字技术、基因技术为基础,以信息革命和生物革命为标志的新经济时代。与时俱进,实现技术、产品、管理、组织、文化的创新,特别是重大决策的科学化,是企业获得持续发展的关键所在。不少中国民营企业至今对此认识不足,而迷信个人作用,搞个人决策,这正是造成其短命的重要原因之一。深入分析中国民营企业决策个人化的危害和根源,有利于实现从个人决策向决策科学化的转型。     

发展粮食期货市场 促进粮食市场化改革

随着粮食生产经营的全面市场化,健全和完善粮食期货市场有了更重要的现实意义:调节粮食供求,稳定粮食价格;优化粮食品种结构,推动产业化经营;为粮食企业提供避险渠道;减轻入世冲击,保护粮食安全。文章指出发展粮食期货市场的政策措施包括:推出大宗粮食期货交易品种;培育和发展套期保值用户;规范粮食现货市场;发展商品投资基金;开创场外交易;调整不符合国际惯例的法规政策。     

基于GASA算法的提前或拖期问题优化

针对企业生产的提前 /拖期问题,提出了提前 /拖期问题的数学模型,在此基础上,利用GASA混合优化策略优化之,既保留了传统遗传算法能很快达到最优值领域的优点,又通过结合模拟退火算法大大改善传统遗传算法在后期的收敛性。     

关于中国21世纪经济地理学发展的几点思考

在深刻认识我国经济地理学发展时代背景的基础上,对经济地理学的发展现状、发展趋势以及所面临的任务进行了若干思考.     

Transport development and the evolution of economic geography

In this paper, based on the recent advances in the new economic geography (e.g., Fujita et al. [12]), we analyze impacts of transport costs on the spatial patterns of economic agglomeration. We first identify prototypes from the existing models, and explain the mechanism of how transport costs influence the balance between economic forces of agglomeration and dispersion. We then investigate the transformation of the agglomeration/dispersion patterns given gradually decreasing transport costs for different goods.Received: Received: July 2004 / Accepted: January 2005, Accepted: Received: July 2004 / Accepted: January 2005, JEL Classification: R12Tomoya Mori: Correspondence toThe authors are grateful to David Bernstein, Tatsuo Hatta, Komei Sasaki, Tony E. Smith, and two anonymous referees for their valuable comments. This research is partly supported by The Grant in Aid for Research 08403001 of Ministry of Education, Science and Culture in Japan, the Murata Science Foundation, and WESCO Civil Engineering Technology Foundation.     

我国经济地理学发展的哲学反思

经济地理学作为地理学中一门重要的学科,其实践和理论尚存在诸多不容忽视的问题。文章试从经济地理学发展的现实表象和存在问题入手,分析问题背后的哲学根源,对我国经济地理学发展提出一些认识。     

地区专业化、产业集中与经济集聚——对我国制造业的实证分析

以新经济地理学模型为基本理论框架,对我国各省区专业化水平、制造业各行业的集中程度和整个制造业的集聚程度进行了实证分析,结果显示1993—2003年间我国各省份的专业化水平呈显著上升趋势,制造业大部分行业集中程度提高,整个制造业集聚程度上升。在制造业各行业集中程度和整个制造业集聚程度的测算中,引入SP指数,结果显示这一指标的引进是非常必要的。     

Feminist Ecological Economics and Sustainability

Synopsis New developments in feminist ecological economics and ecofeminist economics are contributing to the search for theories and policy approaches to move economies toward sustainability. This paper summarizes work by ecofeminists and feminist ecological economists which is relevant to the sustainability challenge and its implications for the discipline of economics. Both democracy and lower material throughputs are generally seen as basic principles of economic sustainability. Feminist theorists and feminist ecological economists offer many important insights into the conundrum of how to make a democratic and equity-enhancing transition to an economy based on less material throughput. These flow from feminist research on unpaid work and caring labor, provisioning, development, valuation, social reproduction, non-monetized exchange relationships, local economies, redistribution, citizenship, equity-enhancing political institutions, and labor time, as well as creative modeling approaches and activism-based theorizing.      

Monitoring the mean and the variance of a stationary process

We deal with the problem of how deviations in the mean or the variance of a time series can be detected. Several simultaneous control charts are introduced which are based on EWMA (exponentially weighted moving average) statistics for the mean and the empirical variance. The combined X − S² EWMA chart is extended to time series. Further simultaneous charts are considered. The comparision of these schemes shows that the residual attempt must be favored if a variance change is present.     

A modified logit model for time series with an application to the pricing behaviour of manufacturing firms in Australia

The modified logit model (Amemiya and Nold, 1975) is generalised to the case where the error term is autocorrelated. The asymptotic distribution (as n →∞ and T →∞) of a feasible GLS estimator of β is derived. Tests of linear restrictions on β and the significance of ρ are presented. The results of the applied work suggest that the factors which explain the pricing behaviour of manufacturing firms, as reported in the tendency survey conducted by the Australian Chamber of Commerce and Industry and the Westpac Banking Corporation, include historical inflation rates of up to 7 quarters and capacity utilisation. First version received: March 2001/Final version received: July 2002 RID="*" ID="*"  The first draft of this paper was written while the author was on study leave at the Department of Econometrics, University of Sydney, Australia.