共查询到20条相似文献,搜索用时 15 毫秒
1.
We use a martingale approach to study optimal intertemporal consumption and portfolio policies in a general discrete-time, discrete-state-space securities market with dynamically incomplete markets and short-sale constraints. We characterize the set of feasible consumption bundles as the budget-feasible set defined by constraints formed using the extreme points of the closure of the set of Arrow-Debreu state prices consistent with no arbitrage, and then establish a relationship between the original problem and a dual minimization problem. 相似文献
2.
3.
We study optimal portfolio, consumption-leisure and retirement choice of an infinitely lived economic agent whose instantaneous preference is characterized by a constant elasticity of substitution (CES) function of consumption and leisure. We integrate in one model the optimal consumption-leisure-work choice, the optimal portfolio selection, and the optimal stopping problem in which the agent chooses her retirement time. The economic agent derives utility from both consumption and leisure, and is able to adjust her supply of labor flexibly above a certain minimum work-hour, and also has a retirement option. We solve the problem analytically by considering a variational inequality arising from the dual functions of the optimal stopping problem. The optimal retirement time is characterized as the first time when her wealth exceeds a certain critical level. We provide the critical wealth level for retirement and characterize the optimal consumption-leisure and portfolio policies before and after retirement in closed forms. We also derive properties of the optimal policies. In particular, we show that consumption in general jumps around retirement. 相似文献
4.
The mean‐variance formulation by Markowitz in the 1950s paved a foundation for modern portfolio selection analysis in a single period. This paper considers an analytical optimal solution to the mean‐variance formulation in multiperiod portfolio selection. Specifically, analytical optimal portfolio policy and analytical expression of the mean‐variance efficient frontier are derived in this paper for the multiperiod mean‐variance formulation. An efficient algorithm is also proposed for finding an optimal portfolio policy to maximize a utility function of the expected value and the variance of the terminal wealth. 相似文献
5.
6.
This paper examines optimal consumption and investment choices and the cost of hedging contingent claims in the presence of margin requirements or, more generally, of nonlinear wealth dynamics and constraints on the portfolio policies. Existence of optimal policies is established using martingale and duality techniques under general assumptions on the securities' price process and the investor's preferences. As an illustration, explicit solutions are provided for an agent with ‘logarithmic’ utility. A PDE characterization of the cost of hedging a nonnegative path‐independent European contingent claim is also provided. 相似文献
7.
老年人生活收入与消费需求的变动分析 总被引:1,自引:0,他引:1
1997年至今的这段过渡期内 ,老年人生活收入的增加是否促使其消费需求结构出现由低层次向高层次的转变 ?对老年人消费需求结构的变动分析结果表明 ,收入增加并没有促使老年人的消费需求结构出现由低向高的改变 相似文献
实证分析表明,城镇居民消费存在过度敏感性,1985—2008年消费由当期收入决定的消费者所占比例不低于67%。造成该种现象的原因主要有二:一是城镇居民收入结构中,工薪收入占绝对主体,财产性收入低,资产财富效应微弱;二是城镇居民收入在国民收入初次分配中的比例不高且不断下降。为了缓解消费的过度敏感性,扩展城镇居民消费,提高居民收入在初次分配中的比重是根本途径。为此,应该提高企业支付给职工的劳动报酬,降低生产税税率,采取措施提高居民财产性收入,同时要抑制住房价格等过快增长。 相似文献
9.
基于2000—2009年的面板数据,在测度中国城乡居民收入不确定性的基础上,比较研究了城乡居民不同类别收入的不确定性对居民分类消费支出的影响,结果表明:各省城乡居民各类收入均出现了不确定性;不同省份城乡居民各类收入的不确定性有所差异,各省内部城乡居民收入的不确定性也不相同;从全国的视角看,各类收入的不确定性对总体消费造成了结构性影响,农村居民收入的不确定性大于城镇居民收入的不确定性。 相似文献
10.
国际贸易、技术变动对我国工业部门劳动收入份额的影响 总被引:3,自引:0,他引:3
文章较为系统地分析了国际贸易、技术进步等因素对中国工业部门劳动收入份额的影响。研究显示在1999~2009年期间,我国工业部门的劳动收入份额总体上呈现出缓慢下降的趋势,工业部门劳动收入份额变动主要是行业内部劳动力再配置的结果;利用中国工业部门21个细分行业的面板数据,通过系统广义矩方法对国际贸易、技术变革对行业劳动收入份额的影响进行计量分析表明,国际贸易具有较为显著的提高我国工业部门行业劳动份额的效应,而技术进步则存在显著降低工业行业劳动份额的效应,这与我国工业部门在研究期内的技术进步具有劳动节约型特征有关。 相似文献
11.
12.
对外贸易与劳动收入占比:基于省际工业面板数据的研究 总被引:1,自引:0,他引:1
考虑到进口贸易与出口贸易在影响机制上的差异性,本文重点探讨对外贸易开放程度增加在我国工业劳动收入占比下降中所起的作用并区分进口贸易和出口贸易的影响。在控制了劳动收入占比与贸易的联立关系之后,本文发现进口贸易的作用显著为负,出口贸易则表现出弱负向作用。此外,资本增强型技术进步也是我国工业部门劳动要素分配地位弱化的重要原因。 相似文献
13.
改革开放以来,我国农村劳动力持续向非农产业转移,转移方式包括就地转移和异地转移。分析了我国农村劳动力两种转移模式的互动特征、内外制约因素及其社会经济效应。两种转移模式呈明显的轮替关系,转移模式失衡和被动调整是改革开放后一阶段收入分配效应降低的重要原因。 相似文献
14.
LIU Zhi-dong 《国际商务-(对外经济贸易大学学报)》2006,(3)
根据资产组合理论的本质,理解和掌握资产组合理论具有重要的意义。本文主要从风险度量方法比较、现实金融资产收益的实际分布与相关性、以及金融资产收益的动态变化特征等角度,对资产组合风险度量与选择的相关文献进行回顾与评述。 相似文献
15.
中国城乡居民收入对旅游消费的影响 总被引:3,自引:0,他引:3
基于计量经济学方法,本文从城乡居民收入与旅游消费数据稳定性与因果关系、城乡居民收入与旅游花费水平回归分析等方面,分析了中国城乡居民收入对旅游消费的影响。研究结果表明:收入水平与旅游边际消费倾向对城乡居民旅游花费影响差异明显,提升城镇居民旅游边际消费倾向与农村居民纯收入水平,是提升我国城乡居民旅游总花费的关键;城乡居民旅游消费对收入过度敏感性均过低,应采取有效措施降低城乡居民在食品、住房、医疗、教育等方面的消费支出,改善城乡居民旅游消费对收入的过度敏感性,促进旅游消费水平提升;城乡居民收入结构对城乡居民旅游花费影响具有较大差异,在城乡居民收入翻番背景下,城乡居民、尤其是农村居民旅游消费水平将得到大幅度提升,并将在国民经济增长中发挥重要作用。 相似文献
16.
运用2008年第二次全国经济普查服务业企业数据,文章实证检验了外资进入对服务业企业劳动收入份额和技能工资溢价的影响。结果显示外资企业存在更高的劳动收入份额,且外资进入程度对当地企业的劳动收入份额存在正向的外溢效应。文章进一步将不同所有制类型与技能劳动力占比的交互项引入工资方程,发现外资企业存在更高的技能工资溢价。我们进一步验证了外资进入对当地劳动力市场技能工资溢价的影响。结果表明,在那些外资渗透率较高、市场竞争相对激烈的地区和行业,外资企业的技能工资溢价现象会产生溢出效应,促使当地企业提高对高技能员工的薪酬待遇。因此,在合理发挥服务业外资进入对收入分配优化效应的同时,也要采取相关措施防止其进一步拉大工资差距。 相似文献
17.
18.
为了验证财税政策对居民消费存在的非线性效应, 文章系统考察了因城乡收入差距的第三方外部因素存在差异时, 财税政策对居民消费影响效应的变化情况. 面板门槛计量模型研究发现, 以城乡收入差距门槛值作为外生变量构建的分段函数中, 税收负担和财政支出规模促进居民消费的城乡收入差距绝对数最优区间分别为4015元-7016元和7912元-10323元; 税制结构和财政支出结构促进的城乡收入差距相对数最优区间分别为0.126-0.171和0.127-0.172. 因此, 应当辩证看待政府财税政策对居民消费的影响作用, 促进我国居民消费的关键点在于财税政策的合理制定与实施. 相似文献
19.
This paper examines the effect of the inclusion of non-interest income on efficiency and economies of scale of Ghanaian banks in a two-stage analysis. The data envelopment analysis technique is employed to estimate efficiency scores with and without non-interest income of 26 Ghanaian banks from 2003 to 2011 in the first-stage analysis. In the second stage, a truncated bootstrapped regression is estimated to examine the effect of contextual variables on bootstrapped efficiency scores. The findings indicate that the exclusion of non-interest income as output variable leads to the under-estimation of efficiency scores. From the second-stage regression analysis, we find a curve-linear relationship between bank size and efficiency to suggest that bank efficiency increases as size also increase due to economies of scale but only up to an optimal point after which inefficiency sets. Market concentration, leverage, and loan loss provisions are also identified as the other significant determinants of efficiency. Policy implications for improving bank efficiency are discussed. 相似文献
20.
Dynamic Optimization of Long-Term Growth Rate for a Portfolio with Transaction Costs and Logarithmic Utility 总被引:3,自引:1,他引:2
We study the optimal investment policy for an investor who has available one bank account and n risky assets modeled by log-normal diffusions. The objective is to maximize the long-run average growth of wealth for a logarithmic utility function in the presence of proportional transaction costs. This problem is formulated as an ergodic singular stochastic control problem and interpreted as the limit of a discounted control problem for vanishing discount factor. The variational inequalities for the discounted control problem and the limiting ergodic problem are established in the viscosity sense. The ergodic variational inequality is solved by using a numerical algorithm based on policy iterations and multigrid methods. A numerical example is displayed for two risky assets. 相似文献