论大学英语课堂教学改革

现代社会对高校毕业生英语应用技能要求越来越高,针对大学生聋哑英语的现状,英语教学改革已经成为摆在外语教师们面前一个现实而又紧迫的课题。本文从构建主义的理论依据入手,通过对教学模式、教学方法和教学手段三个方面的论述表达了笔者对高校英语课堂改革的看法。     

基于共生理论的水景住区设计——以郏县青龙湖住区为例

水景在住区规划中发挥着改善微气候、景观空间构成、休闲娱乐、提高住区品质及经济价值的作用,是北方住区最具吸引力的景观元素。通过青龙湖住区规划的实例分析,在设计中引入黑川纪章的"共生思想",通过规划构思布局、景观设计、空间设计将自然水景、人工水景和住区环境有机的融合在一起,旨在创造出人、建筑、自然和谐共生的人居环境。     

中国企业研发决策同群效应的空间计量分析

考虑到企业间策略互动对研发决策的影响，将空间面板计量模型引入同群效应实证研究。基于2013—2019年中国A股上市公司数据，构建地区、行业和财务特征3类空间权重矩阵，结果发现：中国上市公司研发投入具有明显的惯性；企业研发决策主要受同行业同群企业研发决策（内生同群效应）及其特征变量（外生同群效应）的影响，同地区和相似财务特征的同群企业可以通过特征变量（外生同群效应）对本企业研发决策产生影响；尽管企业研发牺牲了短期盈利，但对股市估值的影响显著为正，说明中国资本市场投资者已具备一定的价值投资意识，而同群企业研发投入对本企业盈利和股市估值的影响均为负，说明中国企业研发互动主要体现为竞争效应而非协同效应；在国家实施创新驱动发展战略后，企业平均研发投入强度显著提升，3类同群效应显著增强。从全局视角对中国企业研发行为进行研究，以期为企业经理人提供有关激励研发创新、提升企业价值的启示。     

美联储量化宽松货币政策退出对我国跨境资金流动的影响

2013年12月19日,美联储宣布削减量化宽松每月资产采购规模100亿美元,标志着正式启动QE退出,美联储QE退出增加了全球经济复苏的不确定性,对我国跨境资金流动产生深远影响,从而引起了市场的高度关注。本文回顾了美国量化宽松政策的实施过程和退出步骤,分析了量化宽松政策退出的主要传导机制与渠道,剖析了美联储量化宽松政策退出对我国跨境资金流动的影响,并提出了相关政策建议。     

Dynamic optimal capital structure with regime switching

We investigate the optimal capital structure of a corporate when the dynamics of the assets (both growth rate and volatility) change following different states of the economy. Two structural models are examined in the paper. The first considers the case when the firm is not facing tax benefit and bankruptcy costs with a regime switching dynamics. This model extends the Black and Cox (J Financ 31:351–367, 1976) model to allow for regime switching risk. The second model incorporates both tax benefit and bankruptcy costs with a regime switching dynamics. This is is more realistic, and is an extension of the Leland (J Financ 49(4):1213–1252, 1994) model with regime switching risk. We obtain closed-form analytic solutions for the optimal capital structure and default barrier for both models.     

临安生态旅游区当地居民的生态环境意识调查

为有效提升生态旅游区当地居民的环境意识,更好地开展生态旅游城市的环境保护工作,实现可持续发展,本文以临安生市态旅游区当地居民为研究对象,从环境知识、环境态度、环境评价、环境行为这四个维度进行调查评价。发现临安当地居民的环境知识水平偏低,环境态度立场鲜明,但对发展和环保间关系(环境评价)的认识不够深入。环境行为与环境态度出现言行不一致的现状,使得居民总体的环境意识偏低,需要加强教育、加强执法力度等来提高当地居民的环境意识。     

Investor protection and corporate cash holdings around the world: new evidence

We provide new evidence that firms under weak governance regimes hold less cash than firms operating under strong governance, contrary to previous literature. Our findings also establish that there are two independent effects for the de jure and de facto aspects of governance that protect minority shareholders. Consistent with managerial empire building prediction, our study reveals that firms deplete their excess cash by overinvesting and this effect is exacerbated in countries with weak governance. The excess cash depletion has an adverse impact on firm performance, more so in countries with weak investor protection which is in support of the agency costs explanation.     

景气指数分析显示：专来一段时期内货币信贷增速将放缓

货币政策目标体系由最终目标、中间目标和操作目标三个层次构成,中央银行对它们的可控性由弱至强。为能够及时而有效地观测与控制货币政策的实施效果与力度,需要对便于观测与控制的货币政策中间目标进行有效的监测、预测与预警．文章应用基于先行指标体系的景气指数分析方法,分析货币政策中间目标的周期波动,揭示中间目标的运行趋向。测算结果显示,未来一段时期内货币信贷增速将放缓。     

Are collective political actions and private political actions substitutes or complements? Empirical evidence from China's private sector

This paper examines the circumstances under which collective and private corporate political actions are more likely to be substitutes or complements. Using data based on a series of nationwide surveys conducted on privately owned firms in China, I find that firms that are engaged in collective political actions are more likely to pursue private political actions. This positive relationship is stronger in less economically developed provinces and when there are greater opportunities for the state to redistribute economic resources in product and capital markets. Meanwhile, this relationship is weaker in the presence of heavier regulatory burdens and for firms in which the state has some equity or owned by individuals who had prior political careers. These findings contribute to the corporate political action literature. Copyright © 2013 John Wiley & Sons, Ltd.     

资源枯竭型城市循环经济发展的动态实证研究

资源枯竭型城市问题已经成为影响国民经济持续健康发展和社会政治稳定的重要因素,发展循环经济是资源枯竭型城市实现可持续发展的重要途径。在综合考虑资源枯竭型城市特征与面临的问题的基础上,以循环经济的"3R"原则为核心,运用"目的树"分析方法构建了包含5个子系统、28个指标的资源枯竭型城市循环经济发展评价指标体系。采用熵权-TOPSIS评价模型,对资源枯竭型城市铜陵循环经济发展的动态发展情况进行评价。评价结果表明,进行循环经济试点6年以来,铜陵市循环经济水平逐步提高,但是不同子系统间发展趋势有很大差异,需要进一步提高资源循环利用水平和严格保护生态环境质量。