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采用加权最小二乘法与向量自回归方法构建了在低碳经济环境下我国碳排放量及其影响因素之间关系的对比性实证分析模型,并进一步利用脉冲响应函数和方差分解探索影响系数大小和时期变化规律。研究表明,一方面,我国碳排放量与其影响因素之间存在一种长期均衡稳定的关系,其中最重要的因素是人均GDP、能源效率和产业结构,其次是人口数量和人均收入;另一方面,通过脉冲响应函数和方差分解得出我国碳排放量对人均GDP、能源效率和产业结构的冲击反应比较敏感,而对人口数量和人均收入水平随时期变化的响应则比较稳定,各变量影响系数在短期和长期存在明显差异。 相似文献
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This study examined risk features of hotel firms and the determinants of their systematic risk. After reviewing the financial data for 31 US hotel firms from 2004 through 2008, we found that 86% of the hotel firms' total risk could be characterized as unsystematic risk. The results showed that while debt leverage and growth are positively related to systematic risk, firm size is negatively associated with such risk. Our findings suggest that conservative growth via mergers and acquisitions, and less reliance on debt financing is advisable for hotel firms seeking to reduce systematic risk and enhance firm value. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献
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