一类稀疏效应下捕食模型正平衡态解的稳定性

考虑了一类齐次Neumann边界条件下具稀疏效应和扩散的捕食者-食饵模型，通过建立适当的Lyapunov函数得到其唯一的正平衡态解的全局渐近稳定性．     

南欧3国社会救助制度反贫困脆弱性：经验分析和比较反思

对南欧的希腊、意大利和西班牙3国的最低收入计划的反贫困经验进行了讨论，从相对贫困率变化的角度看，南欧3国社会救助制度对于贫困减少仍存在脆弱性。同时，分析、对比了中国城市最低生活保障制度对于城市贫困减少的效果，结果表明，就相对贫困而言，贫困减少效果目前还较为有限。最后，就制度设计、政策支持和价值取向等方面提出了思考。     

Ownership concentration and corporate governance practices: substitution or expropriation effects?

The objective of this study is to analyze the relation between ownership concentration and corporate governance practices of a group of Canadian companies listed on the Toronto Stock Exchange. We rely on the corporate governance index developed by the Report on Business (ROB) in 2002. Our empirical results are consistent with the expropriation effect argument that predicts a negative relation between deviation from the one share‐one vote rule and corporate governance best practices. In this context, the dominant shareholder has incentives to maintain weak internal controls in order to facilitate expropriation. In addition, consistent with prior research, our results give partial support to the substitution effect argument by showing a negative impact of ownership concentration on the board composition subindex. Copyright © 2007 ASAC. Published by John Wiley & Sons, Ltd.     

The effects on fish spawning and management implications of impoundment water releases in an intermittent South African river

The potamodromous smallscale redfin minnow (Pseudobarbus asper) spawned in the riffle areas of the regulated Groot River, the major tributary of the Gamtoos River system, during controlled releases of water from Beervlei Dam. Water had been released at irregular intervals from this flood control dam solely for irrigating agricultural lands. Flushing flows removed accumulated salts from riverine pools and were followed by reduced flows which initiated spawning of the minnow species. Developing embryos of P. asper were found in the riffle zone of the main river channel during the water releases. Ripe-running males were located under the boulders in the riffles. Several developing embryos of Labeo umbratus were found with the P. asper eggs. Very little is known about the effects of man-made alterations to the river flow regime on the reproductive activity of fishes in the majority of South African river systems. The agriculturally based flooding regime at Beervlei may have increased the recruitment of the redfin minnow species. Water management must give cognizance to the biological and environmental requirements within the regulated river systems. Water release strategies from Beervlei Dam should include instream flow decisions based on the requirements of the aquatic environment as well as for agriculture.     

金融市场发展、外汇储备积累与经济增长--基于国别门限面板模型的分析

外汇储备持续增长已成为多个国家的经济负担,然而不能忽视外汇储备增长对经济发展的积极影响。基于新兴市场各国短期内无最优方法改善高额外汇储备积累难题的假设条件进行研究,试图寻找能够将外汇储备的积极效应最大化的途径。利用27国相关数据建立门限面板模型后,分析不同金融市场发展水平下外汇储备对经济增长的宏观经济效应。研究结果表明：在发达国家和新兴市场国家,外汇储备均对经济增长具有积极影响。但是,不同的金融市场发展水平也会限制外汇储备的经济效应。金融市场发展水平越高的国家,外汇储备对经济增长的促进作用更为明显。     

宫颈癌新辅助化疗的临床疗效

目的探讨宫颈癌术前应用新辅助化疗的临床疗效。方法 68例宫颈癌术前采用2个疗程的新辅助化疗后进行手术,观察近期疗效。结果 68例患者化疗2个疗程后的临床总有效率为70.1%。经过术前辅助化疗后,进行广泛性子宫切除加盆腔淋巴结清扫手术,全部患者均顺利切除病灶。结论术前新辅助化疗对宫颈癌Ⅰb1~Ⅱb期患者治疗安全有效,可缩小肿瘤体积,提高手术切除率及疗效,进一步改善患者的生活质量。     

股权激励效应研究述评与展望

股权激励效应一直是学界研究和探讨的焦点,但却始终没能达成一致的研究结论。经过系统回顾股权激励领域的相关理论观点和经验研究,发现股权激励效应的研究存在契约整体观、契约要素观和契约结构观三种研究思路。文章以股权激励效应研究思路的演进路径为主线,对三种思路下的研究成果进行了阐释和述评,并展望了今后的研究方向和关键问题。     

区域城镇化差异对FDI空间集聚的影响——基于省级面板数据的GMM估计

随着我国进入城镇化高速发展的新时期,城镇化逐渐展现出其开放性的特点,其对FDI的空间分布具有较大的影响作用。文章利用全国30个省级城市2004-2013年的面板数据,运用广义矩动态面板模型分析城镇化水平区域差异对我国FDI空间分布的影响。结果表明,人口城镇化水平在中部地区与FDI呈显著正向关系、产业城镇化水平在东、中、西地区对FDI均呈现明显负向影响,土地城镇化水平对东部和中部地区FDI的数量和分布产生显著正向影响。因此,本研究有利于从城镇化的角度,制定合理的外商引资政策,在推进城镇化建设的过程中,缩小FDI区域分布的差异。     

市场信心、经济波动与财政政策

市场信心变化是否会造成经济波动,如何选择财政调控策略稳定市场信心进而保持宏观经济稳定,文章利用矢量自回归模型和季度数据,在控制相关变量基础上对此进行的研究表明,市场信心变化对我国宏观经济的滞后影响非常显著,其中企业信心变化与消费者信心变化对宏观经济产生影响的时间路径存在明显差异,虽自1999年以来,积极财政政策对提振市场信心发挥了积极作用,但作用效果在不同政策工具之间差异明显。紧缩性财政收入政策虽对市场信心具有反向抑制效应,但并不显著,扩张性支出政策虽在经济低迷时期有助于提振市场信心,但成效在不同支出项目间差异悬殊,其中,科教文卫等社会性支出的增加对市场信心将会产生积极影响,而行政费的膨胀却会显著恶化市场信心。     

淤泥固化技术的研究综述

随着环境整治工作的不断深入,淤泥的大量产生已经成为不可避免的事实。面对我国人口增长与耕地减少的矛盾,淤泥的开发是解决矛盾的有效途径。因此淤泥的开发利用是最有价值的潜在资源,淤泥的固化技术有很大的发展前景。