关于城乡教育投资收益率的比较

本文对城乡教育投资收益率进行了分析及比较。本文主要结论:(1)因城乡人口流动性大,定量估算的横截面教育收益率不能代表城乡居民真实收益率,利用其作经济分析应十分慎重;(2)农民由于收入较低只能在较高的边际收益率下停止对子女教育支出,所以农民的家庭教育支出较少,收益率反而较高,因此更多教育资本向农民倾斜将提高全社会经济效率。     

基于BP神经网络的高速公路工程造价估算模型研究

工程项目前期造价的确定直接关系到整个项目的总体运作情况,因此准确的确定前期造价是非常重要的。目前工程中应用的投资估算编制方法不是很科学,采用BP神经网络方法改进投资估算的确定方法。结果表明,该方法可以有效的提高其编制精度,为科学的确定和有效的控制工程造价中全过程造价奠定了良好的工作基础。     

基于2007年投入产出表的我国投资乘数测算和变动分析

 本文对固定资产投资乘数、凯恩斯投资乘数和投入产出投资乘数等三种投资乘数进行了测算分析,结果表明近年来我国投资乘数并没有发生大幅度下降,对经济增长的拉动贡献较大。通过对4万亿投资计划的具体测算,表明投资对拉动内需和抵御外部冲击发挥了巨大作用。作为发展中国家,保持较高的投资增速是经济可持续发展的必要条件,未来投资仍将是拉动我国经济增长的主要动力。但应当积极调整投资结构,避免产能过剩、抑制房地产价格上涨,提高投资效率。     

Uniform Tail Asymptotics for the Sum of Two Correlated Classes with Stochastic Returns and Dependent Heavy Tails

Consider a continuous-time risk model with two correlated classes of insurance business and risky investments whose price processes are geometric Lévy processes. By assuming that the correlation comes from a common shock, and the claim sizes are heavy-tailed and pairwise quasi-asymptotically independent, we investigate the tail behavior of the sum of the stochastic present values of the two correlated classes, and a uniform asymptotic formula is obtained.     

天使抑或魔鬼:私募股权基金之于创业板市场的发展

自创业板市场开启以来,我国私募股权基金与创业板市场双双得到长足发展。相对于创业板市场,私募股权基金无疑是天使,促进了创业板市场的发展与完善。然而,行业的无序竞争、普通合伙人融资困难、基金投资短视等弊端暴露了我国私募股权基金行业法制建设落后、监管制度不健全、配套机制建设滞后等问题,中国私募股权基金第一弊案正是这些问题的集中反映。天使在某种情况下也会变成魔鬼,不健全的私募股权基金将会严重损害创业板市场的发展。对此,我国应当通过构建完备的法律体系、强化监管制度、推动配套机制建设等多种方式,促使私募股权基金与创业板市场的协调发展。     

Welfare programs and the state economy

Welfare policy has been controversial and support is often drawn along political affiliation lines, the economic return of investment in welfare programs is frequently cited as a justification for new and expanded policies. To investigate the direct and indirect effects of welfare programs on economic performance, the authors develop a multilink approach, through employment and investment. The relationship is then tested with data from each of the United States from 1976 to 2006. Findings show welfare programs have no direct effect on a state's economy. Indirectly, welfare has a negative effect through investment, though the effect on employment is minimal.     

Economic growth and welfare: How Foreign Direct Investment contributes to improving social order in less developed countries

Abstract

Does Foreign Direct Investment (FDI) promote development? And does it change social order? The attempt to answer these questions will always be controversial, because, first, the effects differ from context to context, and second, it is highly difficult to measure the (positive) spillovers of know-how and technology etc., as well as of contributions to enhancing social responsibility and improving the standards of living in the host country. The outcome will very much depend on how state governments, international bodies, the business world and non-governmental organizations collaborate. Likewise, interdisciplinary collaboration is required to research the issue, between well-trained economists, investment theory specialists, sociologists and ethicists. For this, our article combines a large number of arguments on market and investment theory, business ethics, John H. Dunning’s eclectic paradigm, etc. It examines whether there is practical evidence to support the assumption that doing business through FDI improves social conditions in less developed countries, and whether the logic for this to happen is rooted in ethical theory. The article contributes to insights from the appropriate sub-stream of the development, FDI and poverty/bottom of the pyramid literature, and to highlighting which trends should be followed in academic research. However, there are limitations to the article, which lie with the limitations of ethics frameworks, as these are often only constructed based on certain moral appeal, and only very few of them examine the incentive compatibility of such constructs.     

基于人力资本投资的劳动力迁移模型

劳动力的迁移行为作为人力资本投资的一种形式 ,同样牵涉到成本和收益问题。文章首先介绍了基于人力资本投资的劳动力迁移模型 ,并针对模型列出了模型中存在的问题。在此基础上 ,作者提出模型中应考虑的个体特征 ,同时还综合了到其他学者的研究观点。文章结论是 ,人力资本投资模型的研究仍旧从劳动供给方出发 ,所以它仍属于供给类劳动力迁移模型 ,最终在研究个体劳动力迁移模型中 ,人力资本投资模型可以构成一个有用的组织分析框架。     

中国宏观经济2011年形势走向分析

中国经济结构调整的外部环境正在发生变化,因此必须寄希望于通过扩大人均收入,提高消费能力,使中国市场逐步走向世界的前列。但在目前消费和出口双重疲软的情况下,中国经济仍然需要靠投资拉动增长。2011年下半年经济下行风险不是很大,物价上涨是经济增长最主要障碍,预计货币政策偏紧。     

环境容量约束下旅游税收优惠政策的经济学分析

旅游税收优惠政策为旅游业的发展引进资金创造了良好的条件。当考虑景区的旅游环境容量约束时,税收优惠政策可能会导致旅游投资激励不足或过度激励。向旅游消费者征收生态税或消费税,鼓励旅游企业改善投资结构是旅游税收政策改进的重要方向。