Avoiding arbitrary exclusion restrictions using ratios of reduced-form estimates

We show how to obtain coherent structural-form (SF) exclusion restrictions using the reduced-form (RF) parameter ratios. It will be shown that an over-identified SF corresponds to a group of regressors sharing the same RF ratio value; those regressors should be excluded jointly from the SF. If there is no group structure, then the SF is just-identified; in this case, however, it is no longer clear which regressor should be excluded. Hence, just-identified SF’s are more arbitrary than over-identified SF’s in terms of exclusion restrictions. This is in stark contrast to the notion that the former is less arbitrary than the latter, because the former excludes fewer regressors. We formalize these points, and then suggest to find the number of modes in the estimated RF ratios as a way to find groups in the ratios. For this purpose, an informal graphical method using a kernel nonparametric method and a formal modality test are employed. An empirical example with selling price in a residential real estate market and duration on the market as two endogenous variables is provided. The authors are grateful to the editor and two anonymous referees for their comments     

师承古今的复仇——论东北沦陷区复仇主题文学对中国复仇思想的继承

本文通过对日伪统治时期东北沦陷区文学的考察,对东北作家文学创作中的复仇问题进行整理后,将东北沦陷区文学中与复仇相关的作品作为主要研究对象,对其文学的主要内涵从继承古代复仇文学与五.四新文学创作的角度进行阐释。     

Applying jump-diffusion processes to liquidate and convert venture capital

This study attempts to apply real options and expand the model designed by Lin and Huang [Lin, T.T., Huang, Y.T.: J. Technol. Manage. 8(3), 59–78 (2003)], which helps venture capital (VC) companies to optimize project exit decisions. The expected discounted factor and a jump-diffusion process combine to assess the value of a start-up company, and determine the threshold of the exit timing of liquidation or convertibility for establishing the optimal disinvestment evaluation model for VC companies. When the project value is below V_L^*V_L^\ast, the VC company carries out liquidation, but when the project value exceeds V_C^*V_C^\ast, the VC company performs convertibility. The project value is ranging between (V_L ^*,V_C^*)\left({V_L ^\ast,V_C^\ast}\right), and the best choice is holding the decision and waiting to carry out the rights of liquidation and convertibility next time. Besides, this work attempts to identify the expected discounted time in terms of the investment time for VC companies.     

美国《复苏与再投资法案》关于铁路投资监管的规定对我国的启示

研究了美国《复苏与再投资法案》关于铁路投资监管的规定中,在铁路投资监管的主体、监管的形式和内容等方面值得借鉴之处,分析总结出中国经济刺激政策实施过程中对铁路投资监管的相应不足之处,结合我国的有关法律和实际情况,提出完善我国铁路投资监管的法律建议,即:在主体方面,应该进一步明确新增中央投资协调小组的职能、权力和运行机制,增加全国人大及其常委会作为铁路投资日常监管的主体,完善媒体和公众监督;在形式和内容方面,在事前监管和事中监管方面予以完善,并且增加新增中央投资协调小组的建议权。     

企业集团边界的演变趋势研究

提出母子公司体制下的企业集团,其基于控制权的治理边界,超越了企业法人边界,使得其边界非平面性,而是三维立体的边界。还进一步从动机、有效范围、演变趋势等方面对企业集团三维边界作了分析,提出现实生活中企业集团整合边界范围帕累托最优是比较困难的,尤其是大型国有企业集团在战略重组中往往只能在不优的整体边界范围内创造局部有效的边界范围。最后,运用所提出的理论观点对我国企业集团成长中的规模、结构、管控等问题进行了解释。     

我国中小企业融资约束、代理成本与生产效率关系研究——基于我国180家上市公司的统计数据

中小企业是我国国民经济发展的重要组成部分,对于我国国民经济持续稳定的发展有着重要的促进作用。但是我国中小企业由于存在规模都比较小、体制不完善等问题,因此在融资时有许多困难;并且现代企业制度所有权和经营权分离,又会出现代理成本问题;同时目前国内生产资料价格普遍上升,就如何提高生产效率降低生产成本成为这些中小企业共同面临的问题。文章就上述中小企业问题进行实证研究,检验了融资约束、代理成本与生产效率之间存在的关系。     

基于国内外高技术产业基地经验比较分析对我国基地发展提出的若干保障措施

本文研究旨在基于高技术产业基地保障体系的系统框架,总结和借鉴国外高技术产业基地保障措施经验的基础上,面向国家高技术产业基地"十二五"乃至中长期跨跃式发展面临的新形势、新规律、新使命、新任务,探讨进一步系统探讨了基地保障措施的途径,提出了若干保障措施,为新时期高技术产业基地建设的规划编制和管理决策提供参考。     

WHAT MAKES A GREAT JOURNAL GREAT IN ECONOMICS? THE SINGER NOT THE SONG

Abstract This paper analyses what makes a great journal great in economics. Alternative research assessment measures (RAM) are discussed, with an emphasis on the Thomson Reuters Institute for Scientific Information (ISI) Web of Science database. ISI RAM that are calculated annually or updated daily are defined, including the classic 2‐year impact factor (2YIF), 5‐year impact factor (5YIF), immediacy (zero‐year impact factor (0YIF)), eigenfactor score, article influence, citation performance per paper online, h‐index, Zinfluence, PI‐BETA (papers ignored ‐ by even the authors) and two new RAM measures, self‐citation threshold approval rating and impact factor inflation. The data are analysed for the most highly cited journals in economics, management, business and business–finance on the basis of 2YIF. In addition to evaluating research in the most highly cited journals in economics, management, business and business–finance, the paper evaluates alternative RAM, highlights similarities and differences in RAM criteria, finds that several RAM capture similar performance characteristics, and finds that immediacy and PI‐BETA are not highly correlated with other RAM. Harmonic mean rankings of the 12 RAM criteria are also presented. Emphasizing 2YIF to the exclusion of other useful RAM criteria can lead to a distorted evaluation of journal performance and influence.     

Nonlinear influence on R&D project performance

This study applies artificial neural network (ANN) to explore the relationships between the performance of R&D projects and its determinants. The results indicate that the quality of project environment has an inverse U-shaped effect on the performance of R&D projects, and both project managers' skills and the effectiveness of teamwork have monotonic positive influences on it. Besides, this study utilizes self-organizing map (SOM) to classify the Taiwanese information and electronics companies into three groups and further provides some suggestions. In addition, this paper uses an in-depth interview of qualitative research to explore why the quality of project environment has an inverse U-shaped effect on the R&D project performance, and finds out the main reason. There are two managerial implications in this study. First, the relationships between the performance of R&D projects and its determinants are not always linear in the complex and uncertain environment nowadays. Second, companies must care about the inverse U-shaped effect of the quality of project environment on the performance of R&D projects, although they can enhance the extent of project managers' skills and the effectiveness of their teamwork as much as possible.     

改进的动态反馈负载均衡算法

本文提出了一种改进的动态反馈负载均衡算法,在负载均衡过程中既考虑后台服务器的当前负载,又考虑后台服务器的处理能力,根据每台服务器当前负载比例值的大小合理分配用户请求,进而调整服务器间处理请求的比例,避免服务器超载时依然收到大量的请求,使平均应答时延和吞吐量等获得较好的性能,集群的整体性能得到提高。