Optimal investment-consumption-insurance with random parameters

This paper discusses an optimal investment, consumption, and life insurance purchase problem for a wage earner in a complete market with Brownian information. Specifically, we assume that the parameters governing the market model and the wage earner, including the interest rate, appreciation rate, volatility, force of mortality, premium-insurance ratio, income and discount rate, are all random processes adapted to the Brownian motion filtration. Our modeling framework is very general, which allows these random parameters to be unbounded, non-Markovian functionals of the underlying Brownian motion. Suppose that the wage earner’s preference is described by a power utility. The wage earner’s problem is then to choose an optimal investment-consumption-insurance strategy so as to maximize the expected, discounted utilities from intertemporal consumption, legacy and terminal wealth over an uncertain lifetime horizon. We use a novel approach, which combines the Hamilton–Jacobi–Bellman equation and backward stochastic differential equation (BSDE) to solve this problem. In general, we give explicit expressions for the optimal investment-consumption-insurance strategy and the value function in terms of the solutions to two BSDEs. To illustrate our results, we provide closed-form solutions to the problem with stochastic income, stochastic mortality, and stochastic appreciation rate, respectively.     

朱载堉才是“需求层次理论”的鼻祖——且更独特,更显棋高一着

以往学术界都把美国心理学家马斯洛奉为需求层次理论的鼻祖;但最新的研究成果,彻底推翻了这一陈见,认为中国明朝的科学家朱载堉才是需求层次理论的鼻祖,比美国人马斯洛还要早约三百六十多年,且朱载堉对需求层次的认知,要比马斯洛更独特,更显棋高一着。     

中国新型城镇化必须提升人的城镇能力

中国新型城镇化必须以人为核心,使城乡社会经济的发展与人的发展相适应。文章从人力资本理论的研究视角出发,着重分析中国新型城镇化中人的因素,创造性地提出了"人的城镇能力"这一概念,围绕农业转移人口的市民化,得出了重视人力资本投资,以推进中国新型城镇化的重要结论。     

我国新型农村金融机构存在的问题及对策分析

我国的新型农村金融机构自成立和运行以来,取得了一定的成绩,但也存在着若干问题亟待解决。本文分析了新型农村金融机构运行中存在的问题,并提出改进现状的相关建议,以更好地发挥新型农村金融机构在新农村建设中的作用。     

货币信用属性演化的历史与逻辑

通过讨论主要货币起源与演化理论的矛盾与不足,从货币取得人们信任的角度,尝试整合了货币起源与演化的事实与逻辑,由此可以认为货币的本质是信用,(商品、金属)货币和纸币一样都是信用货币,货币演化是货币内涵的威权因素和物的因素相互竞争的结果;且货币制度的核心是信用。维持人们对货币的信心与币值稳定应当是任何货币调控的出发点和归宿。     

辽宁沿海港口与东北腹地互动发展对策探讨

分析了港口与腹地的关系,对辽宁沿海港口与东北腹地互动发展的现状、在在问题进行了分析,在此基础上,从明确互动层次及港口布局分工、建立内陆干港、提升口岸服务水平、优化腹地产业结构等方面提出了推动辽宁沿海港口与东北腹地互动的对策建议。     

寒地城市街旁绿地园林小品设计研究

寒地城市具有特殊的气候特点和人文特色，园林小品在寒地城市街旁绿地设计过程中具有重要的作用。只有克服寒冷气候对园林造景的不利影响，充分挖掘寒地城市的特色，并将其体现在街旁绿地的园林小品设计过程中，才能提高户外绿地的吸引力，为居民提供舒适的体闲环境。     

El desempeño económico financiero y responsabilidad social corporativa Petrobrás versus Repsol

Alterations in the institutional environment, as a result of the markets integration process and the consequent alterations in stakeholders’ conduct are one of the important vectors of changes in companies’ behavior. In that context, in addition to their yields those companies happen to worry about their attitudes in relation to social and environmental factors. Thus, the corporate social responsibility (CSR) is seen as one more strategy to maintain or increase their income and to harness the enterprise development. The main purpose of this study is the verification of the existing relation between Social Responsibility and the economic and financial performance of two companies in the business of Petroleum, Gas and Bio-combustibles. The investigation was based on a comparison of social-environmental practices developed by Petrobras S/A (Brazil) and Repsol S/A (Spain). For the purpose of verification of the relation between social-environmental performance and the economic-financial one, a linear regression analysis was carried out.     

Foreign Direct Investment,Institutional Voids,and the Internationalization of Mining Companies into Africa

The paper investigates the factors influencing the internationalization of mining firms into Africa and the strategies employed. We find that the three most important factors identified by mining houses as influencing their decisions to invest are all related to institutional voids particular to developing countries—security of tenure, political stability and poor infrastructure. South African firms have shown themselves to be adept to doing business in volatile political and institutional environments because of their experience within their home base with relatively weaker institutions. They have therefore developed advantages over multinational enterprises from industrialized countries to doing business in these new frontiers.     

The symmetric and asymmetric influences of destination attributes on overall visitor satisfaction

Visitors are impressed by specific destination attributes, which are sometimes the main motivating reasons for the travel selection or sometimes they are just one of the elements of a whole destination experience. This is because tourism and travel products are generally a combination of several different supplier offerings or they are a combination of the natural and artificial attributes of a destination that cannot be fully known before the experience of travel. Moreover, the importance and influence of these attributes on overall visitor satisfaction may differ considerably, depending on the market segments. In recent years, some studies have shown that the influences of destination attributes on overall visitor satisfaction are not symmetric in every case. For the purposes of this study, the symmetric and asymmetric influences of destination attributes are investigated for three major market segments of the Side-Manavgat area, Antalya, Turkey. The results show that the importance and influences of destination attributes may change according to the analysis technique employed and the market segment examined.