A discrete and a continuous-time model based on a technical trading rule

In this article we propose a model in discrete and continuoustime that incorporates explicitly a technical trading rule inthe specification of the volatility. The proposed discrete-timemodel is an alternative to GARCH-type processes. We derive conditionsfor the covariance and strict stationarity of the discrete-timeprocess and we study the estimation and inference problems.We also analyze the conditions under which the discrete-timeprocess converges in distribution to a diffusion process. Toillustrate the proposed model and compare it with the GARCHspecification, we analyze the daily closing stock prices oftwo major U.S. companies (Microsoft and Oracle), two stock indices(DAX and NASDAQ) and two U.S. Dollar exchange rates (Euro andSterling)     

浅谈钢与混凝土组合楼盖结构体系

通过对钢与混凝土组合楼盖结构体系的浅析,达到对组合楼盖结构在设计及施工中的更好应用。     

人口学领域的定量研究过程与方法

通过实例剖析,介绍了社会科学研究领域定量分析的研究过程和方法。科学研究是具有明确目的的、对事物之间关系严谨、缜密的探索;它具有整体性,通过系统的程序和过程,在理论的指导下进行。科学研究必须有好的研究问题、理论设计、可以信赖的数据、正确的模型和分析方法、客观的分析结果展示。掌握正确的研究过程和方法将会产生高质量的研究成果。     

基于竞争优势的组合旅游产品链研究

近年来旅游业的发展非常迅速,成为当今世界最大的经济部门之一,许多国家都将旅游业作为其主导产业,致使旅游业的国际竞争非常激烈。文章分析了旅游产品的特征和组合旅游产品的构成,从提升旅游业国际竞争优势的视角,研究和构建组合旅游产品链,进而探讨组合旅游产品链对于优化旅游产品结构、增强旅游产业国际竞争优势的意义。     

柴油降凝组合工艺及催化剂的研究进展

本文扼要地介绍了近几年柴油加氢/临氢降凝组合工艺及催化剂的研究进展状况,通过总结,我们得出:随着柴油质量向低硫、低芳烃、窄馏分、高十六烷值的方向发展,需要通过灵活选择各种专有技术的组合生产优质清洁柴油,利用工艺的优势互补进行多种质量指标的改善,从而满足清洁柴油质量的多种需求.     

公用事业的多产品定价与政府规制:由上海观察

上海电力公司热电联供的热力价格调整案例表明,完全分配成本法可能会导致共同成本在热力与电力产品问的不合理分摊。而激励问题的存在将加剧共同成本的不合理分摊状况,最终结果是用户的福利受到损失。同时。政府的规制行为受到特定利益集团间的竞争驱动,并且规制者自身有着特定的利益目标,最终规制政策的出台实质上是利益集团间的博弈均衡。为此,寻求更为合理的多产品价格规制方法,以及如何保证利益集团博弈中的规制均衡成为一种社会合意的结果,成为多产品公用事业政府规制改革中的重要问题。     

Adult Outcomes for Children of Teenage Mothers

Using data from the British Household Panel Survey, this study examines the relationship between several outcomes in early adulthood (e.g. education, inactivity, earnings and health) and being born to a teenage mother. Besides standard cross‐sectional multivariate regression estimates, we also present evidence from non‐parametric estimates and from estimates that account for unmeasured family background heterogeneity by comparing siblings born to the same mother who timed their births at different ages. Regardless of the econometric technique, being born to a teenage mother is usually associated with worse outcomes. An important channel of transmission of this adverse effect is childhood family structure, which plays a more powerful role than childhood family poverty. Albeit smaller, some of the detrimental effects are also found for children of mothers who gave birth in their early 20s.     

风险投资与高新技术融合的技术转让体系研究

国内外研究现状表明,对风险投资与高新技术融合的技术转让体系的特殊性、体系组成、体系功能等方面的认识有待深化;对推动体系建设的外部条件、经济政策、政策工具的研究尚不充分。有鉴于此,笔者设计了中国风险投资与高新技术融合的技术转让体系,指出了其发育路径,研究了经济政策刺激、政策工具推动体系发育的作用。     

中国财产保险市场分析

中国自1980年恢复国内财产保险业务以来,保费收入以年均25.3%的速度增长,分析中国财产保险市场状况,对完善我国财产市场,有着重要意义。目前我国财产保险市场在发育过程中还面临着较多的矛盾,应从财产保险市场主体、市场结构、产品体系、财产保险市场的空间布局、财产保险市场开放模式等多角度、多方面着手,完善我国财产保险市场体系。     

企业战略形成过程的类型及受组织因素影响的实证研究

Using data collected from 126 firms, this article attempts to classify different patterns of strategy formation process and identify organizational factors influencing the processes. Based on a clustering analysis method, we identify four patterns of strategy formation processes varying in main characteristics, such as command, adaptive, vision, and external constraints, etc. We also find that a firm’s ownership type and its development stage have significant effects on strategy formation processes.