环江油田长8层注水井酸化增注工艺

通过对环江油田长8注水井欠注原因的分析,提出了深部酸化降压增注的技术思路,开展了酸液体系和酸化工艺研究,现场实施取得了良好的效果,为该区注水井降压增注提供了有效的手段。     

大股东治理机制背景的独立董事功用

独立化后的独立董事会削弱大股东治理机制的有效性,其本身也难以发挥监督经理层、保护股东利益的作用,从而可能诱发股东与经理层之间的利益冲突,损害股东整体利益。基于我国上市公司存在双重委托代理问题及投资者法律保护较弱的现实情况,构建具有中国特色的公司治理结构应从两方面着手:政府选择合适的国家终极产权控制方式和合理的代理人行使国有股股权优化大股东治理;制定和切实实行保护小股东的外部强制规则。     

Purchasing Power Parity under Regime Shifts: An Application to Asian Countries*

This paper re‐examines the long‐run purchasing power parity (PPP) relationship for nine Asian countries relative to the USA and Japan during a period containing significant structural breaks. The relevance of considering structural breaks in PPP tests is demonstrated by utilizing the Johansen et al. (2000) procedure that allows for up to two pre‐determined structural breaks. Using conventional tests without considering breaks, one is able to reject the null of no cointegration for only four countries. The Johansen et al. procedure clearly demonstrates the importance of allowing for structural breaks and provides strong support for long‐run PPP for all the countries, regardless of the base country, except in the case of the Philippines vis‐à‐vis Japan. The Hansen–Johansen parameter constancy test indicates stability for all the countries except the Philippines relative to the USA and Malaysia relative to Japan.     

上市方式、大股东持股与民营上市公司的绩效

企业上市可以采取直接上市（IPO）和间接上市（买壳上市等）两种方式。本文考察了民营上市公司的不同上市方式下大股东持股与公司绩效间的关系。研究发现,间接上市的民营企业的大股东持股对公司绩效没有影响,而直接上市的民营企业的第一大股东持股与公司绩效存在正的线性关系,前5大股东持股与公司绩效呈非线性的U形关系。当考虑大股东持股的内生性时,发现间接上市的大股东持股与公司绩效互不影响,而直接上市的大股东持股与公司绩效互为正相关。     

双寡头垄断下中国大飞机的战略选择

全球民机制造市场处于美国波音和欧洲空客的双寡头垄断之下,两家公司占80%以上的市场份额,中国商飞将直接面对波音和空客同等机型的竞争。未来30年,全球航空市场将继续保持高速增长,中国和亚太是全球最具成长性的市场。应大力创新发展中国大飞机,依靠政府支持,技术创新形成中国大飞机的产品竞争力;借助金融支持,模式创新形成中国大飞机的市场竞争力;进行产业链整合,系统创新形成中国大飞机的产业竞争力。     

Herding behavior in the Pakistan stock exchange: Some new insights

This study attempts to examine the presence of herding behavior in the Pakistan Stock Exchange (PSX). The novel contribution of this paper is that it investigates the herding phenomenon from a large number of facets such as herding of firms towards market, herding of firms towards industry portfolios, herding of industry portfolios towards market, herding in mostly traded stocks and in large and small stocks, and herding in the crisis period. For this purpose, we use the herding behavior model of Christie and Huang (1995) on the daily closing prices data of 609 firms listed on the PSX from January 2004 to December 2013. Results show that individual firms do not herd towards market index, except when the market experiences a negative return of 5%. However, when we sort firms into small and large groups based on median market capitalization, results indicate that large firms show herding behavior in extreme market movements. Further, we find that firms in several industries herd towards their industry portfolios. However, we find weak evidence of industry portfolios herding towards the market. We also segregate the impact of financial crisis of 2008 from normal times. These findings support results of our baseline estimation.     

Independent directors and earnings management: The moderating effects of controlling shareholders and the divergence of cash-flow and control rights

The research results on the suppressing effect of independent directors on earnings management are not consistent in existing literature. In addition, it has been argued that using financial statements provided by top management to investigate top management's earnings management is not appropriate. Therefore, the purpose of this study is twofold. First, we used external auditors (including the auditors of Taiwan Stock Exchange Corporation and the auditors of two Big Four accounting firms – Deloitte & Touche and KPMG in Taiwan) as respondents in order to obtain less biased data. Second, we investigate the moderating effects of controlling shareholders and the divergence of cash-flow and control rights on the relationship between independent directors and earnings management. The results show that both the existence of controlling shareholders and the divergence of cash-flow and control rights have significant suppressing effects on the relationship between independent directors and earnings management. Theoretical and practical implications are also discussed.     

后路隧道施工重点及难点分析研究

本文主要以中石化中原建设工程有限公司承建的海西天然气管网二期工程-后路隧道工程为例,分析研究大坡度、小断面隧道施工中的控制重点、难点及相关处理措施,并通过对隧道开挖的重点环节进行分析研究来确定相应的应对措施,旨在为今后类似情况的隧道施工提供科学依据。     

Limit theorems for reflected Ornstein–Uhlenbeck processes

This paper studies one‐dimensional Ornstein–Uhlenbeck (OU) processes, with the distinguishing feature that they are reflected on a single boundary (put at level 0) or two boundaries (put at levels 0 and d > 0). In the literature, they are referred to as reflected OU (ROU) and doubly reflected OU (DROU), respectively. For both cases, we explicitly determine the decay rates of the (transient) probability to reach a given extreme level. The methodology relies on sample‐path large deviations, so that we also identify the associated most likely paths. For DROU, we also consider the ‘idleness process’ L_t and the ‘loss process’ U_t, which are the minimal non‐decreasing processes, which make the OU process remain ≥ 0 and ≤ d, respectively. We derive central limit theorems (CLTs) for U_t and L_t, using techniques from stochastic integration and the martingale CLT.     

多重委托代理下医生最优激励模型设计探究

"过度医疗"即指超过疾病实际需求的诊断和治疗的行为。医疗服务的特殊性,使患者、医生、监督方之间存在信息不对称和多重委托代理关系。鉴于此,从政府的第三方监督职能出发,将政府和患者作为共同委托人,避免政府与医院之间道德风险的发生,构建医生作为代理人的最优激励模型,并得出相关结论与启示。