Equity Ownership and Firm Value: Evidence from Targeted Stock Repurchases

In contrast to the negative average abnormal return associated with the announcement of a control‐related targeted repurchase (greenmail transaction), we find that the announcement of a noncontrol‐related targeted repurchase is associated with a positive and significant average abnormal return. Cross‐sectional analysis indicates that the change in firm value at the announcement of a noncontrol‐related targeted repurchase is negatively related to the resulting changes in both insider ownership and outside blockholdings. We also find significant differences in announcement‐period stock price effects depending on the identity of the selling shareholder.     

关于经理人股票期权会计确认与计量

近年来,我国引进西方国家流行的经理人股票期权,这是我国企业激励机制改革的有益尝试,也给会计处理带来了新问题,特别是经理人股票期权的会计确认和计量问题。     

用材料再生循环指标重新评估金属资源寿命

1972年出版的Romacrab的“增长的极限”报告预测地球矿产资源的需求量不久将超过供给能力，进而导致现代文明的终结。几十年过去了，其预测的情况并未出现。究其原因，材料的再生循环功不可没。因而在评价资源寿命时必须考虑再生循环的影响。本文提出了材料再生循环指标的概念，并利用材料再生循环指标对金属资源寿命重新进行评估。     

统一股价指数的必要性及绩效分析

股票指数是投资者分析股市动态,拟定投资策略的重要参考依据,同时也是研究和分析一国政治、经济等情况的重要指标。在我国同时存在沪深两个证券交易所,人为地造成了股票市场的分割,难以形成统一的股票价格指数体系,应尽快编制出全国统一的股价指数,促进我国证券市场的健康发展。     

经理人股票期权会计计量问题探讨

在经理人股票期权的会计处理中 ,计量是关键环节 ,它主要解决经理人股票期权在何时、以什么单位及以多少数量入账的问题 ,也就是计量属性、计量标准和计量方法问题。     

A Microeconomic Approach to Diffusion Models For Stock Prices

This paper studies a class of diffusion models for stock prices derived by a microeconomic approach. We consider discrete-time processes resulting from a market equilibrium and then apply an invariance principle to obtain a continuous-time model. the resulting process is an Ornstein-Uhlenbeck process in a random environment, and we analyze its qualitative behavior. In particular, we provide simple criteria for the stability or instability of the corresponding stock price model, and we give explicit formulae for the invariant distributions in the recurrent case.     

消费税结构的优化

本文从绿色贸易壁垒的理论基础及其表现形式出发 ,分析了绿色贸易壁垒对我国外贸的影响 ,最后从绿色技术指标体系、绿色法律制度、加强国际磋商与合作三个方面提出了相关法律对策。     

加快开发南方草地资源,促进生态经济建设

我国南方草地资源丰富,发展草业潜力极大。本文就南方草地的现状、类型及发展草业的途径进行了探讨。     

Time‐varying Hedge Ratios: A Principal‐agent Approach

We use the classic agency model to derive a time‐varying optimal hedge ratio for low‐frequency time‐series data: the type of data used by crop farmers when deciding about production and about their hedging strategy. Rooted in the classic agency framework, the proposed hedge ratio reflects the context of both the crop farmer's decision and the crop farmer's contractual relationships in the marketing channel. An empirical illustration of the Dutch ware potato sector and its futures market in Amsterdam over the period 1971–2003 reveals that the time‐varying optimal hedge ratio decreased from 0.34 in 1971 to 0.24 in 2003. The hedging effectiveness, according to this ratio, is 39%. These estimates conform better with farmers’ interest in using futures contracts for hedging purposes than the much higher estimates obtained when price risk minimisation is the only objective considered.     

The Subprime Panic*

Understanding the ongoing credit crisis or panic requires understanding the designs of a number of interlinked securities, special purpose vehicles, and derivatives, all related to subprime mortgages. I describe the relevant securities, derivatives, and vehicles to show: (1) how the chain of interlinked securities was sensitive to house prices; (2) how asymmetric information was created via complexity; (3) how the risk was spread in an opaque way; and (4) how trade in the ABX indices (linked to subprime bonds) allowed information to be aggregated and revealed. These details are at the heart of the origin of the Panic of 2007. The events of the panic are described.