基于VaR修正理论的投资组合优化模型

根据风险价值VaR的计算思路,本文提出了基于GARCH理论的风险计量投资组合优化模型;同时在修正的VaR——尾条件期望的基础上对证券组合投资的优化模型做了进一步的改进。     

台湾旅游专业大学生实习的期望与评估研究

本文以台湾真理大学旅游学院为例,采用问卷方法,研究学生从事旅游实习的期望与成效。研究表明:(1)学生在选择实习单位时自主性高,不易受外界环境影响因素左右;(2)学生对从实习获得实际操作技术经验及专业知识有高度期望;(3)实习的最大收获为实质的知识与专业技能的获得;性别、实习的找寻方式、业者提供的实习方式(例如工作轮调,沟通管道和职前培训)和企业的规模均对学生实习期望和成效有一定显著影响;学生实习期望越高时,所获得的实习成效将相对提高。     

经济条件、人口特征和风险偏好与城市家庭的旅游消费——基于国内24个城市的家庭调查

旅游者的旅游消费支出对旅游产业的发展至关重要。它是旅游者的经济条件、人口特征和行为特征等因素共同作用的结果。但国内现有的研究由于多采用宏观数据,缺少描述旅游者人口和行为特征的微观数据,对旅游消费支出的影响因素分析有失偏颇。文章采用2010年对中国24个城市的居民家庭进行调查收集到的旅游消费数据,综合考虑家庭的经济条件、人口特征和行为特征,以家庭为单位,采用广义线性模型定量研究了影响家庭旅游消费支出的影响因素。研究表明:除家庭资产和收入外,家庭对收入的预期显著影响家庭的旅游消费,这解释了旅游产业对宏观经济的变动比较敏感的原因。它折射的宏观经济意义是显而易见的:当经济不景气时,旅游业可能是率先遭受冲击的产业。反之,当经济向好发展时,旅游业也往往蒸蒸日上。以户主年龄作为代理变量,调查还发现城市家庭的旅游消费与家庭生命周期密切相关,当户主年龄在25~34岁时家庭旅游消费支出达到高峰。此外家庭的风险偏好也显著影响家庭的旅游消费支出。借鉴美国消费金融调查用分类变量测度风险厌恶的方法,文章发现风险厌恶程度越高的家庭越愿意将大部分收入用于储蓄,从而相应地减少旅游消费支出。由于家庭承受的风险多数无法对冲,因此提高风险厌恶程度较高的家庭的旅游消费,恐怕单靠旅游产业自身还无法解决,需要保险业等相关产业共同努力来创造一个较好的旅游产业发展环境。     

Assessing recreation carrying capacity of the environment attributes based on visitors’ willingness to pay

Recreation carrying capacity (RCC) is one of the most important indictors used in measuring the usage limits for the forest park resources. However, the consensus has not been reached with respect to the RCC’s content and its measuring metrics. In this paper, we attempt to establish a new RCC theoretical framework based on the demand theory of the tourism product characteristics. In the process, the choice experiment and orthogonal design methods are used in questionnaire designs and the conditional Logit model is used for parameter estimates. More than 700 park visitors are surveyed for data collection at the Shenyang National Forest park of Liaoning province in China. The primary park attributes being considered encompass vegetation, coverage, water quality, number of rubbish on the park trail path, admission fees, and congestion. The carrying capacity threshold for each specific attribute is identified.     

Assessing holiday satisfaction of Australian travellers in Vietnam: An application of the HOLSAT model

The hotel business model has been diversified in response to the various needs of consumers. Many previous studies focused on the alteration factors of the hotel business model from the consumer's point of view. Although it is one of the factors that affect alteration of the hotel business model, the manager's perspective is also an important alteration factor. This article emphasizes that it is necessary to consider not only the consumer side, but also the management side based on two approaches of the strategy theory: the positioning approach and the resource-based approach.

Surveys were conducted by mail in order to gather information regarding what managers in Japan consider to be important components of a hotel. As a result, “location” was found to be the most important component, followed by “annex facilities” and “deployment system”. Once the components were ordered according to their relative importance, a strong relationship was found between the managers' preferences and the characteristics of “syukuhakusyutai-type” hotels, which are ‘direct management’ (DM) hotels located usually in the city. In Japan, the number of “syukuhakusyutai-type” hotels has recently increased, therefore capturing the spotlight in the hotel industry. However, the results of this research are not compared with those of much previous research conducted on hotel choice attributes, because the measured variables differed significantly.     

中国利率期限结构的非线性动态调整:基于MS-VECM模型的研究途径

基于MS-VECM模型对预期理论调整作用下的中国利率期限结构非线性动态过程进行的实证研究,结果表明:预期理论在中国利率期限结构中是成立的;中国利率期限结构具有两区制的非线性动态特征,可以按预期理论的调整强度将两种区制分别描述为"强调整区制"与"弱调整区制";不同期限利率的平均变动幅度和平均风险溢价水平会随区制状态变化而发生变化,具有区制相依性,区制间的转移具有非对称性;利率期限结构与物价压力的非线性区制划分具有相似性,物价波动是利率期限结构非线性动态变化的重要原因。     

Disorder in the Risk Order

Abstract

This paper studies the difference in global equity portfolios allocated by the criterion of minimizing the risk by using two different risk measures, the standard deviation and the conditional value at risk. An empirical analysis is performed on a comprehensive stock exchange database. The main hypothesis of the present work is that the choice of risk measure has crucial importance in portfolio optimisation, especially in those situations when the stock markets are extremely volatile and the return distributions are non-normal. The rationale behind establishing minimum-risk portfolios is to keep track of the highest possible risk reduction benefits from international diversification.