地区专业化的度量

在封闭经济假设和地区间需求结构一致假设下,本文构造了地区专业化的度量指标——地区专业化系数;这一度量指标更具一般性,产业结构差异系数、空间分布差异系数、绝对利差及行业分工指数等指标只是作为它的特例而存在。在讨论地区专业化问题时,如果忽略地区的(或行业的)相对规模因素,除了犯有逻辑推理错误外,在实践中还存在着可能得出错误判断的倾向。本文发现:中国工业的地区专业化水平自20世纪80年代中后期以来有了较大程度的提高;如果忽略地区的(或行业的)相对规模因素来讨论中国工业的地区专业化问题,则会高估中国工业的地区专业化水平。     

中国产业结构变迁与经济增长的实证分析

本文对我国1978～2002年产业结构变化状况和产业结构变化趋势进行定量分析,考察产业结构变动引起各产业部门对经济增长的贡献和作用的相应变化.实证检验表明,这一时期我国产业结构变动基本符合工业化发展的演变规律,但从我国经济发展的要求看,产业结构转换仍滞后于总量增长的要求;进一步优化产业结构,需要着力解决"三农"问题、提升企业的国际竞争力、加快发展第三产业.     

略论产业集群技术标准与集聚的正负效应之相关性

产业集群是现代产业发展过程中形成的一种具有典型特征的，介于企业和行业之间的产业组织形态。产业集聚的巨大正效应是产业集群形成和发展的重要原因。同时，产业集聚也会产生负效应，这些负效应可能导致产业集群发展缓慢，甚至衰退和消亡。找到正确有效的途径强化产业集聚的正效应，预防和消除产业集聚的负效应，是保持产业集群健康、持续发展的关键。技术标准对产业和企业的命运起着越来越重要的作用，技术标准与产业集群发展、运行秩序规范、负效应的防范与消除等方面都有着紧密的相关性，是促进产业集群发展的有效工具和手段。     

The knowledge management strategy and the formation of innovative networks in emerging industries

This paper presents an agent-based simulation model with local network externality to analyze strategic interactions over investment on new economic knowledge. R&D knowledge flows and spillovers are the results of non-cooperative games played between neighboring agents in the model. The model demonstrates a situation where no agents have incentives to hide their economic knowledge, a situation that is observed in open source software development projects. The likelihood of obtaining a stable situation where new economic knowledge is openly shared is increased when heterogeneity of agents is introduced.      

Organising international supplier relations: An exploratory study of Western purchasing in China

This paper analyses Western purchasing in China in order to investigate the motives for sourcing, the specific requirements of the area and, in particular, the base and features of supplier relationships. It reports recent experiences of seven companies based in Finland, including two global companies, two units with foreign ownership and three Finnish SMEs. Prevalent in Chinese sourcing are long-term supplier relations, but no partnership relations have been established. The companies build their supplier relations gradually and they all emphasise a long-term viewpoint to Chinese sourcing. Commitment of the Chinese partner is a key challenge, overcoming of which would help companies to avoid and solve, e.g. quality problems. The study shows that, for the Western supply personnel, key competences and tools for bridging the psychic distance are social skills and interest in the Chinese culture.     

芯钢管混凝土节点的芯管壁厚与节点承载力关系的数值分析

对一种已经通过试验研究的钢管混凝土结构的新型节点进行数值分析。这种节点将钢管混凝土柱的钢管在节点区间断,在节点区设置芯钢管,使梁中的纵筋在节点中直通、梁与节点区混凝土成为一体可靠的传递梁中的弯矩、剪力及轴力。本文利用数值分析弥补模型试验数量少的缺陷。选择不同芯钢管壁厚的节点模型进行非线性有限元分析,得出芯钢管壁厚对节点承载力的影响规律。分析结果表明芯钢管壁厚是影响节点承载力的主要因素之一。     

警惕我国企业集群发展中潜在问题

企业集群是当今区域经济发展规划的新趋势 ,引起了多学科领域学者关注。我国已经出现了一些企业集群的雏形 ,但是这些企业集群都存在不同的问题。以东莞、温州及部分的高新区为例 ,从各自的形成过程、发展轨迹等角度 ,讨论了各具特色的区域集群存在的不同性质的问题     

The lexicographic composition of abstract games

The lexicographic composition of reflexive and complete binary relations (which are often called abstract games) is studied. The necessary and sufficient conditions are obtained for a lexicographic composition of quasi transitive relations to be quasi transitive.The case of acyclicity of lexicographic composition of two relations is also investigated. Received: September 25, 2000; revised version: November 28, 2000     

Dynamic R&D competition with memory

We consider a differential game of R&D competition and explore the impact of rivalry on the firms' investment behavior over time. Using closed-loop strategies and hence allowing for strategic interactions among rival firms we show that R&D spending by the individual competitor is increased due to competition in the race for priority. This leads us to argue that competitive encounters enhance R&D activities at the same time as increasing efficiency in the race for a technological breakthrough.     

非农投资总量、结构和要素替代对就业的影响

将影响非农产业就业量的增长因素分解为:投资总量效应、结构变化效应和要素替代效应;投资总量的增长是拉动非农就业增长的主要力量,投资的行业结构变化效应以及要素替代效应导致了非农就业的下降。