Optimal Lending Contracts and Firm Dynamics

We develop a general model of lending in the presence of endogenous borrowing constraints. Borrowing constraints arise because borrowers face limited liability and debt repayment cannot be perfectly enforced. In the model, the dynamics of debt are closely linked with the dynamics of borrowing constraints. In fact, borrowing constraints must satisfy a dynamic consistency requirement: the value of outstanding debt restricts current access to short-term capital, but is itself determined by future access to credit. This dynamic consistency is not guaranteed in models of exogenous borrowing constraints, where the ability to raise short-term capital is limited by some prespecified function of debt. We characterize the optimal default-free contract—which minimizes borrowing constraints at all histories—and derive implications for firm growth, survival, leverage and debt maturity. The model is qualitatively consistent with stylized facts on the growth and survival of firms. Comparative statics with respect to technology and default constraints are derived.     

证券基金淘汰与反淘汰问题的初步研究

我国证券投资基金在经历了初期“繁荣”之后，目前已进入市场化淘汰时期。文章首先指出我国证券基金逐渐露出的若干淘汰信号，进而从内外部（即主客观）两大方面分别审视其淘汰成因，最后落脚到详尽拟定反淘汰对策上来。文章首开证券基金淘汰与反淘汰问题的研究，不仅是为理论创新，更是为它的可持续发展提供实践依据。     

浅谈会计教育改革

会计队伍素质的提高有赖于会计教育水平的提高，如何培养出适应社会发展的高素质的会计人才，已成为会计教育面临的课题。客观上对高级会计人员需求不断增长与落后的会计教育的矛盾越来越突出，会计教育改革势在必行。     

试析"入世"与我国经济发展

加入WTO，我国经济与世界经济融为一体，给我国经济带来全新的历史机遇，有利于我国现代企业制度的建立和经济改革的发展，有利于提高人民生活水平，有利于农、林、牧均衡发展和生态建设。同时也带来了挑战，必须转变政府职能，致力环境创新，建立与国际接轨的社会主义市场经济体制，依托科教进步，实施跨越式发展。     

Regulation Fair Disclosure and Earnings Information: Market, Analyst, and Corporate Responses

With the adoption of Regulation Fair Disclosure (Reg FD), market behavior around earnings releases displays no significant change in return volatility (after controlling for decimalization of stock trading) but significant increases in trading volume due to difference in opinion. Analyst forecast dispersion increases, and increases in other measures of disagreement and difference of opinion suggest greater difficulty in forming forecasts beyond the current quarter. Corporations increase the quantity of voluntary disclosures, but only for current quarter earnings. Thus, Reg FD seems to increase the quantity of information available to the public while imposing greater demands on investment professionals.     

北京市中学生关于SARS的认识与反应的跟踪调查研究

2 0 0 3年 5月和 2 0 0 4年 1月 ,通过问卷跟踪调查方式对海淀区某居民小区的中学生有关SARS的认识和反应进行了研究 ,内容涉及中学生对SARS的了解程度及了解方式、关于预防SARS的知识和相应的行为变化等。中学生对SARS有一定的认识和了解 ;各大媒体在SARS期间对于宣传公共卫生知识起到了重要的作用 ;中学生群体目前对SARS仍旧有一定的恐惧心理 ;中学生注重卫生的程度因为SARS的远去而有所降低。加强公众对于流行疾病的基本认识 ,进一步改善其卫生习惯 ,仍然是我们需要面对的问题。     

语言与文化的关系及了解文化的策略

语言是学习文化的主要工具,人在学习和运用语言的过程中获得整个文化;文化知识影响到语言学习者的各个学习阶段,对学习者变得越来越重要.文化教学的策略是创造一个真实的教室环境等.     

从产品整体概念出发 创新产品营销

基于我国目前市场上多数企业之间的不良竞争状况，特别是表现在市场上的同质化竞争，使得企业之间的产品市场营销缺乏新意，从而导致一些企业缺乏可持续发展的能力。本文从产品整体概念和成功企业的营销实践的解析中，提出了一些办法，以期对企业有所帮助。     

Uncovering the Risk–Return Relation in the Stock Market

There is ongoing debate about the apparent weak or negative relation between risk (conditional variance) and expected returns in the aggregate stock market. We develop and estimate an empirical model based on the intertemporal capital asset pricing model (ICAPM) that separately identifies the two components of expected returns, namely, the risk component and the component due to the desire to hedge changes in investment opportunities. The estimated coefficient of relative risk aversion is positive, statistically significant, and reasonable in magnitude. However, expected returns are driven primarily by the hedge component. The omission of this component is partly responsible for the existing contradictory results.