浅析接种疫苗应注意的事项及不良反应

我国日前实行的计划免疫包括宝宝出生后注射乙肝疫苗和卡介苗.也就是说母亲若患有乙肝,通过接种疫苗,可以在一定程度上避免宝宝被传染.     

关于热计量技术分析

本文对热水供热系统温控与热计量技术问题进行了分析.实现供热计量按用热收费必须做到系统温度控制.     

物流过程中的可再生资源的回收和利用

企业再生资源是企业生产加工制造过程中,尚有使用价值的排放物。企业可再生资源种类繁多,地点分散,因此,对再生资源的回收和利用提出了特殊要求。本文从我国可再生资源的概念、种类和物流特点分析入手,并在此基础上提出我国企业对可再生资源的回收利用途径。     

我国国际集装箱铁路运输的问题与对策

我国国际集装箱铁路运输迫切要求加快改革和建设,尽快扩充路网规模,为国际集装箱多式联运提供运力支持。     

The 4^th CSMEF, More Opportunities for SMEs

The fair will be jointly organized by National Development and Reform Commission （NDRC）, Ministry of Finance （MOF）, Ministry of Commerce （MOFCOM）, State Administration For Industry ＆ Commerce （SAFIC）, China Banking Regulatory Commission （CBRC）, People＇s Government of Guangdong Province, Ministry of Economy, and Trade and Industry of Japan （METI）.     

Belgium,Eagerfor Chinese Investment

April 17,2007 was the 36th anniversary day of the diplomatic relations between China and Belgium. According to the press conferece by Belgium Embassy in China, in June, Belgium Prince Philippe will visit China, accompanied by a large Belgium trade and commercial delegatin.     

Standardization,A Hot Issue for IPR Discussion

Since becoming a WTO member in 2001, China has been involved in the discussion of two hot issues： one is the protection of intellectual property rights（IPRs）, and the other is the standardization in the industrial development. Hosted by the Ministry of Commerce（MOFCOM） and State Intellectual Property Office（SIPO）, ＂WTO： IPRs Issues in Standardization International Symposium＂ was held in Beijing on April 17, 2007.     

情境教学在高中英语教学中的应用浅析

高中英语情景教学使教学活动与学生的生活更为接近,教师对学生能够理解或较为熟悉实例的引用,并依此设计教学情景,能通过语境激活背景知识,促进学生用已学知识自主学习的能力,这既能为新知识的学习作好铺垫工作,又能有效降低新知识学习的难度,而且,学生通过置身于情景中的学习,能够更直接、主动参与到英语教学活动中来.因此,在高中英语教学中探索情境教学法的应用具有一定的现实意义.     

Household Life Insurance Demand

Abstract

What types of households own life insurance? Who owns term life and who owns whole life insurance? These are questions of great interest to insurers that operate in a highly competitive market. To answer these questions, we jointly examine household demand of two types of insurance, term and whole life, using data from the Survey of Consumer Finances, a probability sample of the U.S. population. We model both the frequency and the severity of demand for insurance, building on the work of Lin and Grace by using explanatory variables that they developed. For the frequency portion, the household decisions about whether to own term and whole life insurance are modeled simultaneously with a bivariate probit regression model. Given ownership of life insurance by a household, the amounts of insurance are analyzed using generalized linear models with a normal copula. The copula permits the bivariate modeling of insurance amounts for households who own both term and whole life insurance, about 20% of our sample. These models allow analysts to predict who owns life insurance and how much they own, an important input to the marketing process.

Moreover, our findings suggest that household demand for term and whole life insurance is jointly determined. After controlling for explanatory variables, there exists a negative relationship for a household’s decision to own both whole and term life insurance (the frequency part) and a positive relationship for the amount of insurance purchased (the severity part). This indicates that the greater the probability of holding one type, the smaller the probability of holding the other type of life insurance. However, higher demand for both types of insurance exists when a household decides to own both. This mixed effect extends prior work that established a negative relationship, suggesting that term life insurance and whole life insurance are substitutes for one another. In contrast, our findings reveal that the ownership decision involves substitution, but, for households owning both types of insurance, amounts are positively related. Therefore, term and whole life insurance are substitutes in the frequency yet complements in the severity.     

Impact of exchange rate regime reform on asset returns in China

Employing monthly data over the period 1999–2010, this paper examines the impact of China's exchange rate regime reform in July 2005 on three major asset markets: house, land, and stocks. We test whether the reform, which switches from a fixed exchange rate regime to a managed floating one, has brought forward structural changes to asset return dynamics. The results suggest that the exchange rate regime switch exerted the most significant impact on house and land returns at the national level, in terms of both returns and their volatilities. In contrast, its impact on China's stock market was moderate, with no structural change being detected in its returns and only weak structural change being found in the dynamics of its volatility. We also find that in comparison with other popular explanatory variables, broad money supply and inflation have the largest explanatory power on housing and land returns in China after the policy reform.