多元化教学法在《社区护理学》教学中的应用

目的:探讨多元化教学法在《社区护理学》教学中的应用。方法:实验组采用PBL教学法、现代教育技术教学法、角色扮演法及激励教学法等多种教学方法,对照组采用传统的以讲授为主的授课方法。结果:实验组考试成绩高于对照组组,且对课堂教学效果满意。结论:多元化教学法能激发学生学习兴趣、培养学生能力、提高教师综合能力及教学水平,在今后的教学中值得推广。     

多元化经营与经营绩效——基于中国纺织业上市公司的实证研究

本文采用2003～2005年相关数据的算术平均数,通过方差分析和相关分析相结合的方法,对我国纺织业上市公司多元化经营与其盈利能力、成长能力和绩效稳定性能力的关系进行了实证分析。理论分析和实证研究表明：适度的多元化经营对于我国纺织企业在现阶段是可行的,也是合理的。     

Limitations of portfolio diversification through fat tails of the return Distributions: Some empirical evidence

This study investigates the level of risk due to fat tails of the return distribution and the changes of tail fatness (TF) through portfolio diversification. TF is not eliminated through portfolio diversification, and, interestingly, the positive tail has declining fatness until a certain level is reached, while the negative tail has rising fatness. This indicates that fat tails are highly relevant to common factors on systematic risk and that the relevance of common factors is higher for the negative tail compared to the positive tail. In the portfolio diversification effect, the declining fatness of the positive tail further reduces risk, but the rising fatness of the negative tail does not contribute to this effect. The asymmetry between the fatness of the positive and negative tails in the return distribution corresponds to the asymmetry of the trade-off relationship between loss avoidance and profit sacrifice that is expected as a consequence of portfolio diversification. Investors use portfolio diversification to reduce their risk of suffering high losses, but following this strategy means sacrificing high-profit potential. Our study provides empirical confirmation for the practical limitation of portfolio diversification and explains why investors with diversified portfolios suffer high losses from market crashes. An examination of the Northeast Asian stock markets of China, Japan, Korea, and Taiwan show identical results.     

试析进一步提升共青城市企业自主创新能力的对策

为深入了解共青城市企业自主创新情况,笔者深入工业园区,对共青城市高新技术企业和部分科技型企业进行了调研并提出了适当的对策。     

国际化视角下我国企业多元化经营现状及对策思考

经济全球化深入发展,并购浪潮风起云涌,多元化经营对我国企业具有战略意义。本文从国际化的视角,系统阐述了企业多元化经营的动因,同时,对我国企业多元化经营现状进行了分析。在借鉴国外多元化经营经验的基础上,提出了企业多元化经营的建议及策略。     

上海城乡经济多样化测度方法及其演变特征

以上海市为例,从作物多样化、产业发展多样化、土地利用结构多样化、城市经济功能多样化等视角,提出了相应的定量测度方法并展开实证分析。研究结果表明:11950年以来,尽管大多数区县的作物多样化程度趋于下降态势,但上海郊区的作物多样化程度依然较高;近郊区的作物多样化程度的下降幅度大于远郊区,且两者的作物多样化程度在1990年前后发生了明显改变。2改革开放以来,上海农业发展日益趋于多样化;上海工业则经历了"两升两降"的结构调整和优化过程,优势工业行业的集中化和专业化与其它工业行业的分散化和多样化交替演进;上海服务业的多样化程度总体上呈现在波动中上升的态势。31996年以来,上海土地利用结构多样化指数基本呈现上升趋势,且土地利用结构的多样化程度总体较高。41980年以来,上海城市经济功能多样化态势日益明显,产业结构升级与就业结构多样化互动发展。     

Can proactive environmental strategy improve Multilatinas' level of internationalization? The moderating role of board independence

This paper explores the relationships between proactive environmental strategy (PES) and internationalization in emerging markets multinationals from Latin America (Multilatinas). Drawing on the resource‐based view and institutional theory and using a sample of 86 listed firms during the period 2013–2017, we find that Multilatinas with higher tiers of PES are associated with higher degrees of geographic international diversification. Because adopting PES is directly conditioned by institutional pressures to comply with stakeholders' regulations and expectations, Multilatinas that implement advanced PES will be able to achieve a higher level of international presence in foreign markets. Our results also reveal that board independence positively moderates the relationship between PES and geographic international diversification. Specifically, board independence provides Multilatinas with the opportunity to integrate valuable knowledge and expertise and thus to take advantage of implementing advanced PES to achieve even greater levels of internationalization. This study expands understanding of how environmental strategies influence internationalization of firms in the Latin American business context.     

事务所多元化经营与生产效率——基于事务所的平衡面板数据

本文运用2006年至2010年45家事务所的平衡面板数据,基于Malmquist生产效率指数计算事务所的动态生产效率,并进而针对事务所多元化经营与生产效率的内在关联展开分析.研究发现,由于纯技术效率变化的增长幅度较小,注册会计师行业生产效率提升的主要驱动因素是技术水平进步和规模效率进步;执行多元化经营的事务所相比于仍然仅专注提供传统审计业务的事务所,获得了更大的技术进步、更高的规模效率改善,以及更高的生产效率进步;进一步区分不同类型事务所,本土大型事务所的“先动者”没有获取更大的生产效率进步,及相应分解项的改善,本土事务所的“早期从众者”则不仅获得了更高的生产效率进步,也获取了更大的技术进步和更高的规模效率改善.     

Trends in stock-bond correlations

Previous studies document the existence of long-run trends in comovements in the stock and bond markets. Following these findings, this article examines possible trends in stock-bond return correlations. To this end, we introduce a trend component into a smooth transition regression (STR) model including the multiple transition variables of Aslanidis and Christiansen (2012). The results indicate the existence of significant decreasing trends in stock-bond correlations for many advanced safer countries. In addition, although stock market volatility continues to be an important factor in stock-bond correlations, the short rate and yield spread become only marginally significant once we introduce the trend component. Our out-of-sample analysis also demonstrates that the STR model, including the volatility index and time trend as the transition variables, dominates other models. Furthermore, we find a significant increase in stock-bond correlations for riskier euro countries around the beginning of the euro crisis. Our findings of decreasing and increasing trends in stock-bond correlations can be considered a consequence of the decreasing effects of diversification and more intensive flight-to-quality behaviour that have taken place in recent years and after the euro crisis.     

企业剩余资源与大战略集合模型——对多元化战略的一个新解释

在关于企业多元化战略的理论中,大战略集合模型从企业外部环境的角度对企业为何多元化、何时多元化给出了一种解释。文章首先分析了此模型在解释上的局限性。作为改进,在模型中加入了“企业剩余资源”这一来自企业自身的因素,并将剩余资源分为“暂时过剩”和“永久过剩”资源