关于计量分析方法论的检验

频率调查的可信度问题是语言计量分析的基础,将其跟Ambiguity问题联系在一起进行研究,通过这些研究注意到正确的计量分析的要点。本文提出了进行正确的计量分析时要注意的几个问题,论述了确保可信度需要的corpus大小,强调了计量分析要慎重进行。     

OPTIMAL NUMERAIRES FOR RISK MEASURES

Can the usage of a risky numeraire with a greater than risk free expected return reduce the capital requirements in a solvency test? I will show that this is not the case. In fact, under a reasonable technical condition, there exists no optimal numeraire which yields smaller capital requirements than any other numeraire.     

Capital Structure under Costly Enforcement*

We consider financial structure and repayment behavior in a setting where cash flows are private information to the entrepreneur and the cost of enforcing repayment differs across security holders. If enforcement costs are lower for shareholders than for creditors, a mixed capital structure with debt and equity can obtain in equilibrium. Under a mixed capital structure, creditors intervene in low cash‐flow states while shareholders intervene in high cash‐flow states. Moreover, strategic defaults, costly bankruptcy, shareholder intervention, and violation of absolute priority occur with positive probability on the equilibrium path. Several of the predictions from our framework are consistent with evidence not readily explainable by existing theories.     

价值工程在产品外观设计中的应用

外观设计中产品的经济因素和审美因素是产品不可或缺的要素,两者是有机结合在一起的,互相制约、互相渗透。如何平衡产品的经济因素和审美因素,这就需要运用价值工程学的知识,来改善产品审美功能与产品成本之间的关系。我们将按照价值工程学的步骤和方法,来进行探讨。其中目标成本的确定是我们工业设计中平衡产品的经济因素和审美功能的尺度,价值工程学正是通过这个尺度来改善产品审美功能与产品成本之间的关系。     

Dynamic costly state verification

Summary. I study a model of dynamic risk sharing with costly state verification (CSV). In the model, a risk neutral agent enters an infinitely repeated relationship with a risk averse agent. In each period, the risk averse agent receives a random income which is observed only by himself, unless the risk neutral agent engages in costly monitoring. I provide a set of characterizations for the optimal contract, and I show that CSV has interesting effects on the long run distribution of the agents expected utilities.Received: 19 February 2003, Revised: 11 February 2004, JEL Classification Numbers: D8.This research was initially joint work with Bruce Smith. I thank Bruce for the inspiration. I thank Fernando Alvarez, Narayana Kocherlakota, Steve Spear, and an anonymous referee for helpful comments. I also thank seminar participants at Carnegie Mellon University, Federal Reserve Banks of Minneapolis, Federal Reserve bank of Richmond, Duke University, SUNY Buffalo, University of Rochester, University of Pittsburgh, University of Western Ontario, the 1998 Econometric Society winter meeting, the 1999 SED meeting, and the 1999 SITE workshop at Stanford University for discussions.     

我国社会经济发展对海洋科学技术的需求分析

本文从维护国家海洋权益,增强国防安全,促进经济发展,保护海洋生态环境及防灾减灾,海洋管理和参与全球海洋事务等方面,进行了我国社会经济发展对海洋科学技术的需求分析,通过对我国海洋科研力量现状的总结和科技需求分析 ,提出 :为逐步完成时代赋予海洋领域的新任务,必须把海洋科学研究和技术开发放在重要地位,发挥科技对海洋事业发展的支撑和保障作用。     

新科技革命对我国经济体制改革的新要求

新科技革命是技术创新成果积累和制度变革相互作用的产物。新科技革命带来的社会生产力飞跃性发展,必然对生产关系和上层建筑产生深刻影响,对我国经济体制改革提出新的历史要求。我国迎接新科技革命的挑战,必须深化改革,为先进生产力快速成长创造良好的制度条件。     

一种安全的可验证密钥管理方案

随着敏感、机密信息通信的普通化,信息的安全性成为人们关注的焦点,密钥的安全管理是加密信息安全的关键因素。针对现有PKI体系中密钥管理机制的缺陷和目前面临的难题,提出了一种在密钥生成、托管和恢复过程中由用户、n个托管机构、CA共同协作完成的改进方案。该方案能够验证用户托管密钥的真实性并能很好的保护用户私钥的机密性。     

Coordinated strategic defaults and financial fragility in a costly state verification model

Diversification through a financial intermediary has the benefit of transforming loans that need costly monitoring into bank deposits that do not. We show that financial intermediation in a costly state verification model has a cost not yet analyzed: it allows for the existence of multiple equilibria, some of which are characterized by borrowers defaulting on their loans because they expect other borrowers to do the same (i.e. bad equilibria arise due to strategic complementarities in entrepreneurs’ actions). We propose two mechanisms that fully implement the desired equilibrium allocation.     

医用吸引类设备检定装置的研制及应用

本文分析了国内外医用吸引类设备研究现状及存在的问题,简述了医用吸器检定装置的研制及应用实列。