房价波动影响结婚决策的研究

中国房地产市场经历20多年发展,与人民生活形成了紧密联系,房价波动对青年的结婚决策产生影响。该文将房价纳入即将结婚男女的效用方程,并运用面板数据模型对我国2004—2008年31个省、自治区、直辖市的房价增长速度和初婚率进行分析,计量分析结果表明,在房价快速增长的近几年,房价增长速度提升1个百分点,初婚率下降约0．02个千分点,且我国初婚率对房价增长速度的变动敏感。我国房价的快速上涨确实对青年的结婚决策产生了明显压力。因此,政府适当控制房价。尤其是住宅性商品房价格的增长速度,这对于实现家庭稳定、社会和谐具有重要的现实意义。     

A note on asymptotic distributions in directed exponential random graph models with bi-degree sequences

The asymptotic normality of a fixed number of the maximum likelihood estimators (MLEs) in the directed exponential random graph models with an increasing bi-degree sequence has been established recently. In this article, we further derive a central limit theorem for a linear combination of all the MLEs with an increasing dimension. Simulation studies are provided to illustrate the asymptotic results.     

股票流动性与期望收益的关系研究

本文选取换手率作为股票流动性指标,采用FM两阶段截面回归方法研究了股票流动性与期望收益的关系。研究表明,我国股票市场流动性的波动较为稳定;股票流动性和期望收益的异常波动主要受政策的影响,但在周内的变化不存在系统性差异;上市公司的市场价值与股票收益无关;股票的流动性与期望收益负相关;投资者可以根据股票流动性与期望收益的关系套利。     

对国有企业业绩评价体系问题的探讨

针对我国国有企业业绩评价体系存在的问题,借鉴西方业绩评价的研究成果,结合我国国有企业的特点,笔者认为,应该从企业综合绩效评价体系的理论依据、增加有关智力资产的评价指标、经济增加值引入绩效评价体系等几个层面完善我国国有企业业绩评价体系。     

Maximal Expectations of Extreme Order Statistics from Increasing Density and Failure Rate Populations

We determine sharp bounds for the expectations of the first and second and last order statistics for the i.i.d. samples from the increasing density and failure rate populations. These bounds are expressed by means of the population mean and standard deviation. The results are determined by use of the projections of elements of Hilbert spaces onto convex cones.     

The pharmaceutical industry of Puerto Rico: Ramifications of global competition

This paper utilizes a non-homogeneous production function to estimate the efficiency of the pharmaceutical industry of Puerto Rico using data from 1980 to 2008. Global competition in recent years has resulted in job loss and plant closures requiring strategies to profitably use the industry's excess capacity. The estimated results indicate operation at decreasing returns to scale mainly due to the decreasing output elasticity of the number of plants; labor productivity, however, is positive and increasing. Shifting production to generic drugs as a challenge to foreign competition is a top policy consideration.     

山西农民收入结构分析

采用纵向和横向相结合的研究方法 ,分析了山西农民收入结构。认为近年来山西农民收入增长回升无力 ,且内部收入差距、城乡收入差距、与发达省份收入差距都在扩大。因此需要采取提高农民生产经营的效益和劳动生产率 ,提高财政对农业支持的比重 ,加强农村税费制度改革 ,积极调整农业产业结构及加快小城镇建设步伐等措施 ,以促进山西农民增收