论农业结构调整的生态基础

我国目前进行的新一轮农业结构调整，无论从形式、内容，还是手段、目标上都与以往有很大 的不同。从农业生产的本质特征出发，农业结构的调整应该在农业系统运作的规律范围内进行。在目前我国农业生态系统已经遭受破坏的状况下，农业结构调整的一项重大任务就是按照自然规律，重新整合农业生态系统，从而恢复系统内部被人为破坏的种种秩序。     

Important Intermediate Transactions and Multi-sectoral Modelling

For the maintenance and development of a disaggregated econometric model, the present paper deals with some aspects related to the identification of important intermediate transactions. First, some methodological aspects related to earlier works are discussed. By comparing the properties of different selection methods based on the recent West German input–output table, the calculations confirm the common finding that the necessary level of endogenization can be bounded meaningfully by an a priori investiga tion of the intersectoral transactions. This is also valid if the selection method considers restrictions that deal with the consistence of input–output tables and if some broader error criteria are applied. The main result of the empirical applications seems to be that some attention should be paid to temporal changes of important coefficients.     

生态园林城市规划理论研究

分析了生态园林城市的概念及提出背景;对园林城市、生态园林城市、生态城市建设理论模式进行了辨析;探讨了生态园林城市规划理念,即整体协调发展理念、综合要素统筹理念、有限目标理念、城市开敞空间管制理念、科学指标体系理念;指出生态园林城市实现生态化的主导途径为城市结构生态化和城市功能生态化;提倡在继承、发展和保护的基础上规划生态园林城市的主体--生态园林绿地系统.     

Aggregation of Directional Distance Functions and Industrial Efficiency

Three main objectives are pursued in this paper. First, we intend to analyze the aggregation problem of directional distance functions from a constructive viewpoint. We provide necessary and sufficient conditions concerning the structural properties of the production technology and of the nature of groups of firms. Indeed, exact additive aggregation holds for a linear technology and for a direction solely defined in the output space. Second, since these conditions are somewhat restrictive, we are interested in providing a measure for the aggregation bias through the relationship between industrial and structural technical efficiency. Finally, we show that this aggregation bias is a lower bound for industrial allocative efficiency.     

河南瑶沟金矿床形成机理

本文通过对瑶沟地区断裂构造的研究,定量地分析了成矿期构造应力场方向,结合区域上金矿床资料,确认该地区石英脉型金矿、破碎带蚀变岩型金矿以及萤石矿脉的形成及分布,是断裂构造多期活动的基础上,岩浆期后成矿热液分带性的结果。并建立了该地区金矿成矿模式。     

关于俄罗斯产出下降的一个解释

转轨经济中的结构调整既包括正常经济发展过程中的结构调整,又包括转轨本身所引致的结构调整。就转轨本身所引致的结构调整来说,又包含产业结构的调整和所有制结构的调整两重含义。就正常经济发展过程中的结构调整来说,俄罗斯面对的是成熟经济的结构调整的困难问题。就转轨本身所引致的结构调整来说,俄罗斯不具备增量调整的条件,无法克服转轨经济中的“两难困境”。俄罗斯经济绩效差具有事前决定的特点,是事前决定了的。     

业务流程再造与组织结构变革——中国工商银行厦门分行扁平化改革的探索与实践

业务流程再造和组织结构变革是构造科学公司治理结构的重要一环。2005年上半年,作为工商银行总行进行城市行机构扁平化改革试点的厦门分行,在整合业务流程、优化组织架构、完善管理机制等方面进行了积极的探索,同年8月对辖属网点全面实施了直通式管理。厦门分行的扁平化改革遵循“以推行集约化经营为目标,整合业务流程,以梳理业务流程为基础,优化组织架构”的总体思路,坚持以客户为中心、以效益为导向、以内控为基础和以人为本、循序渐进的原则,实行分行-支行两级机构管理模式,合理确定网点支行的管理半径,分专业进行业务流程重组,取得了一定的成绩。     

中国饲料工业期货的价格发现实证研究

本文借助向量自回归模型、协整检验、误差修正模型、方差分解、脉冲响应函数等方法,以中国唯一的饲料工业期货———大连商品交易所豆粕期货品种为例,研究了期货价格与现货价格之间的动态关系,定量刻画了期货市场在价格发现中的作用。研究结果显示:豆粕期货价格与现货价格存在相互引导关系,并且期货与现货价格之间存在长期均衡关系,对豆粕期货来说,期货市场在价格发现功能中起到主导作用。     

Behavioral assumptions and theory development: the case of transaction cost economics

From a critical realist perspective, I discuss the role played by behavioral assumptions in organization theories, and use transaction cost economics as an illustrative example. Core behavioral assumptions often constitute the foundation of the mechanismic explanations of a theory, and thus should play a pivotal role in theory development. I distinguish between assumption‐based and assumption‐omitted theory testing, and show that empirical research in transaction cost economics has been dominated by assumption‐omitted testing. To establish a solid foundation for a new theory, management researchers should pay more attention to assumption‐based testing. Copyright © 2006 John Wiley & Sons, Ltd.     

Benefiting from network position: firm capabilities,structural holes,and performance

While strategy scholars primarily focus on internal firm capabilities and network scholars typically examine network structure, we posit that firms with superior network structures may be better able to exploit their internal capabilities and thus enhance their performance. We examine how innovative capabilities—both those of focal firms and those they access through their networks—influence the performance of Canadian mutual fund companies. We find that a firm's innovative capabilities and its network structure both enhance firm performance, while the innovativeness of its contacts does not do so directly. Innovative firms that also bridge structural holes get a further performance boost, suggesting that firms need to develop network‐enabled capabilities—capabilities accruing to innovative firms that bridge structural holes. Copyright © 2005 John Wiley & Sons, Ltd.