基于投入产出与解释结构建模法相结合的产业关联及层次识别建模

将投入产出方法与解释结构建模相结合,取长补短,提出了基于这两种方法相结合的产业关联层次识别的分析方法,并呈现了该方法的算法步骤、识别层次结果的基本特性以及其与以往产业关联分析方法的比较优势.最后以经统一调整的1997及2002年投入产出表为基础,对我国国民经济产业关联的层次识别进行实证分析,经对识别结果的跨期对比分析,证明该识别方法的解释效果良好.     

产业结构、就业贡献率与就业增长——基于云南省第三产业的实证

通过产业结构偏离度的分解和比较,对云南第三产业就业进行实证分析,较充分论证了云南第三产业还有很大的吸纳就业的潜力,并指出了就业有效增长的第三产业内部行业的选择.研究表明:(1)近10年,云南一、二、三产业的就业贡献率分别为27.8%、2.2%、69.9%,新增就业岗位的69.9%由第三产业提供,第三产业产值每增长1个百分点,平均增加就业岗位就达1.56万个,比第二产业多0.9万个;(2)云南第三产业在发展的同时没有充分发挥其吸纳就业的能力,还有很大的就业吸纳空间;(3)批发零售贸易餐饮业、社区服务业将是云南第三产业扩大就业的主要行业,而交通运输仓储及邮电通信业则很难有较大吸纳就业的空间.     

A Spatial Structural Decomposition Analysis of Chinese and Japanese Energy Demand: 1985–1990

This paper proposes a spatial structural decomposition analysis to measure the effects of the changes in intra- and inter-country linkages on the embodied energy demand in the concerned country. For the empirical analysis, we have used the China- Japan inter-country input–output tables for 1985 and 1990, expressed in constant prices of 1990. The empirical results reveal that (1) at least for the period between 1985 and 1990, the effects of the non-competitive input structural changes in China on the primary energy requirements of Japan were negligible, and (2) the contribution of the Japanese final demand shifts on the total change in Chinese primary energy demand was 40 times larger than that of the Chinese final demand shifts on the primary energy requirements of Japan. The Japanese policy makers should concentrate on the energy impacts of the changes in the domestic production structure rather than the changes in the Chinese production structure.     

中国航空货运顾客价值动因的实证研究

通过考察中国航空货运,建立航空顾客价值的决定因素与动态性理论模型,运用结构方程方法对其检验,结果表明:时间因素和便捷性因素是影响货运顾客价值的核心要素,价格因素已退之其次,而且来自竞争者、服务商、顾客、宏观环境的变化都对顾客价值动态性有显著影响。     

Using replication research for just-in-time purchasing construct development

Using replication research, the validity of the just-in-time purchasing (JITP) construct is established. Although empirical researchers have examined JITP over the last two decades, a consistent set of valid, reliable factors has not been used. The lack of valid construct is a barrier to hypotheses testing and meta-analyses on JITP. This study confirmed the validity of six JITP factors: top management commitment, employee relations, training, supplier quality management, transportation, and quantities delivered using two different data sets and testing the first- and second-order structure of the JITP construct. Content validity, reliability, unidimensionality, convergent validity, discriminant validity, criterion-related validity, and an invariant factorial structure of the JITP construct were empirically established.     

“Itô's Lemma” and the Bellman Equation for Poisson Processes: An Applied View

Using the Hamilton-Jacobi-Bellman equation, we derive both a Keynes-Ramsey rule and a closed form solution for an optimal consumption-investment problem with labor income. The utility function is unbounded and uncertainty stems from a Poisson process. Our results can be derived because of the proofs presented in the accompanying paper by Sennewald (2006). Additional examples are given which highlight the correct use of the Hamilton-Jacobi-Bellman equation and the change-of-variables formula (sometimes referred to as ``Itô's Lemma'') under Poisson uncertainty.     

Recursive utility with unbounded aggregators

A new framework is presented for the study of the existence and uniqueness of solutions to the Koopmans’ equation in the unbounded case, that is based on the contraction mapping approach. In the bounded below case with bounded consumption streams, uniqueness of the solution in the whole class of weak-star continuous utility functions is obtained. When the aggregator is unbounded below and/or consumption streams are unbounded, existence of a weak-star continuous solution is shown, and a simple criterium to check the sufficient conditions for existence is provided. Juan Pablo Rincón-Zapatero and Carlos Rodríguez-Palmero gratefully acknowledge financial support by the Ministerio de Educación y Ciencia and FEDER funds under Research Projects MTM2005-06534 and SEJ2005-08709/ECON, respectively, and by Consejería de Educación de la Junta de Castilla y León under Research Projects VA99/04 and VA017B05, respectively. This paper has substantially benefited from the comments of an anonymous referee. Particular and special thanks are due to Robert Becker for his very helpful comments and valuable suggestions.     

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.