商业银行内部评级体系构建的模型风险研究

自上个世纪70年代以来,风险管理模型为银行的风险量化管理提供了工具,但也同时引致了模型风险。除少数银行外,大多数商业银行在实施内部评级法时都着力构建自己的风险管理模型体系。不论是直接引入外部模型还是自我构建模型,都必然存在模型风险的问题,其模型风险主要产生于基础模型和构建过程两个方面。由于中国正处于转轨经济阶段,因此中国商业银行在内部评级体系构建中的模型风险除了来源于基础模型、模型数据以外,模型使用环境的特殊性也是一个不可忽视的因素。压力测试和极端值方法是避免模型风险的有效技术手段,而风险文化的建设则是规避模型风险的根本所在。     

供应链企业间战略共识如何影响技术创新绩效——知识共享与供应链协同的作用

在动态复杂的市场环境中,企业不仅要重视内部创新力量,同时需要依托外部力量,充分发挥外部知识资源在创新过程中的作用。基于认知行为理论,采用多元层次回归和Bootstrap方法,分析供应链企业间战略共识、知识共享和供应链协同对企业技术创新绩效的作用。结果发现：供应链企业间战略共识对知识共享和企业技术创新绩效具有促进作用;知识共享在供应链企业间战略共识与技术创新绩效间起中介作用;供应链协同正向调节供应链企业间战略共识与知识共享的关系,并正向调节知识共享的中介作用。     

Gendered giving: the influence of social norms on the donation behavior of men and women

• We study if men and women are subject to different influences when determining their level of charitable giving. In particular, we examine differential sensitivities to social norms among donors to a public radio station. Our survey of 975 donors finds that male donors are more likely than female donors to use social norms to inform their own behavior. We conduct a laboratory experiment to investigate the influence of social information on social norm formation and giving. Our results suggest that temporarily created social norms influence giving by men significantly more than by women. This result replicates and establishes the causal relationship between social norms and donations suggested by our field findings. We conclude with a discussion of theoretical and practical implications of these results.

Copyright © 2009 John Wiley & Sons, Ltd.     

Unbundling institutional determinants of multinational investments

Previous studies often examined how a broad-based institution affects foreign direct investment (FDI) flows across countries. However, analysis of differential impacts of two or more constituent institutions within a broad-based institution appears to be more useful for policy decision-making. There is a paucity of studies on how constituent institutions within a broad measure of institution affect FDI across countries. Our article constitutes the first attempt in bridging this gap. In this article, we examine the relative effects of property rights institution (PI) and contracting institution (CI) on investment flows. Our results show that PI is much more important than CI in determining the cross-border flows of FDI and affiliate sales. Moreover, PI is found to be more important for FDI than for affiliate sales, indicating that final goods are less of a concern for being expropriated by governments and powerful elites than capital goods. Through unbundling a broad-based institution and examining how the constituent institutions affect investments flows, our article provides practical location decisions for investments in FDI, mergers and acquisitions (M&A) and affiliate sales.     

广场的职能——对城镇中心广场的调研与评价

通过对城市广场的评价和研究,来阐述广场即是一个有建筑物构成的场所,也是一个用采展示建筑物的极好的有利条件;并且广场是向市民提供开放的体闲空间.城市形体环境是由各种实体即建筑物、构筑物、道路、树木……构成的.     

西部地区中小企业创业环境优化研究

中小企业创业环境优化就是改善与中小企业创业相关的各种外部因素,促进中小企业创业成功进行。本文借鉴GEM模型,对重庆典型区县中小企业创业环境进行调研分析,针对中小企业创业环境中存在的问题,从金融支持、人才培训、产业发展、基础设施建设、政务环境改善、创业氛围营造等方面提出优化对策。     

Efficiency measurement and decomposition for the Chinese state-owned commercial banks at the provincial level

This study adopts a bank production function approach to the measurement of efficiency of the Chinese state-owned commercial banking groups at the provincial level from 1998 to 2003. Applying Data Envelopment Analysis and efficiency decomposition analysis, this paper for the first time presents detailed empirical evidence on the technical efficiencies of the Chinese state-owned commercial banks across both the provinces and banking groups. The empirical evidence has revealed limited effects of the banking reform programmes and highlighted the need to encourage spatial competition and corporate governance reform across Chinese provinces and to take differential strategies to further improve operational efficiency at the provincial branch level.     

A critical evaluation of alternative methods and paradigms for conducting mediation analysis in operations management research

Mediation as a theory testing approach has witnessed considerable adoption among Operations Management (OM) researchers. Although mediation-testing methods have evolved tremendously in the past decade, their dissemination in the OM field has not seen parallel growth. These advanced techniques facilitate the testing of existing and complex hypotheses in a more precise manner. With the intent of critically evaluating existing and alternative methods for conducting mediation analysis needed to support sophisticated empirical research, this paper first reviews OM studies that tested for mediation in the past eleven years (2002–2012) from top-tier OM journals. Four commonly used mediation approaches were identified. Based on principles of good theory building, type of mediation model, and properties of empirical data, we evaluate the existing methodologies and make recommendations on how to improve the rigor of OM mediation testing. Using published OM studies in top journals as examples, we then illustrate the relevance and advantages of these recommendations, as well as their ease of use. Furthermore, we empirically show that more robust and insightful results can be achieved by adopting these techniques, which in turn have the promise of leading to better theory building and testing in the field of operations management.     

A Field Experiment in Charitable Contribution: The Impact of Social Information on the Voluntary Provision of Public Goods

We study the effect of social information on the voluntary provision of public goods. Competing theories predict that others' contributions might be either substitutes or complements to one's own. We demonstrate a positive social information effect on individual contributions, supporting theories of complementarities. We find the most influential level of social information is drawn from the 90th to 95th percentile of previous contributions. We furthermore find the effect to be significant for new members but not for renewing members. In the most effective condition, social information increases contributions by 12% ($13). These increased contributions do not crowd out future contributions.