Imitators and optimizers in Cournot oligopoly

We analyze a symmetric n-firm Cournot oligopoly with a heterogeneous population of optimizers and imitators. Imitators mimic the output decision of the most successful firms of the previous round à la Vega-Redondo, F., [1997. The evolution of Walrasian behavior. Econometrica 65, 375–384]. Optimizers play a myopic best response to the opponents’ previous output. Firms make mistakes and deviate from their decision rules with a small probability. Applying stochastic stability analysis, we find that the long run distribution converges to a recurrent set of states in which imitators are better off than are optimizers.     

Predicting bankruptcy in the Texas nursing facility industry

Approximately 50% of nursing facilities in Texas petitioned for bankruptcy during the 1998–2004 period. Using a logit regression model tested for robustness, we find nursing facilities that are profit-seekers, chain members, pay higher than average wage rates, accept more intensive-care residents and obtain a larger than average portion of their funding from public sources are highly vulnerable to negative changes in regulatory policy decisions on Medicare and Medicaid reimbursement. Larger facilities having higher than average occupancy rates and quality of care are less susceptible to adverse decisions. The model correctly classifies a facility as either bankrupt or solvent in about 75% of cases. We also examine the duration of bankruptcy using accelerated failure-time models. It appears that the duration of bankruptcy depends on location, out-of-state ownership, length of ownership, volume of resident days supplied, total cost and proportion of revenues from Medicaid.     

高度重视经济运行中的流动性过剩问题

我国经济运行中流动性过剩问题严重 自2003年我国走出通货紧缩的阴影后,经济就步入了新一轮增长的周期,连续4年国内生产总值保持两位数的增长,而物价水平却控制在1.2%～3.9%的涨幅内.     

当前物价形势的特征及政策建议

目前,我国物价形势的主流是健康的,从总体上看没有明显脱离"基本稳定"区间,在社会可承受范围之内,短期不存在高通货膨胀风险,国民经济依然运行在"高增长、低通胀"轨道上.     

我国进出品银行的改革与转型

中国进出口银行是我国的官方出口信用机构,是符合国际通行规则和惯例的制度安排.官方出口信用机构,是指提供政府支持的担保、保险和贷款,主要支持本国国际经济活动的金融机构.     

Polar sets of fractional Brownian sheets

The properties of the polar sets are discussed for a real-valued (N, d)-fractional Brownian sheet with Hurst index. Sufficient conditions and necessary conditions for a compact set to be polar for the fractional Brownian sheet are proved. The infimum of Hausdorff dimensions of its polar sets are also obtained by means of constructing a Cantor-type set to connect its Hausdorff dimension and capacity. Research supported by the National Natural Foundation of China (10471148), the Sci-tech Innovation Item for Excellent Young and Middle-Aged University Teachers of Educational Department of Hubei (200316).     

18-run nonisomorphic three level orthogonal arrays

In this paper we construct all possible orthogonal arrays OA(18,q, 3,2) with 18 runs and 3 ≤ q ≤ 7 columns and present those that are nonisomorphic. A discussion on the novelty and the superiority of many of the designs found in terms of isomorphism and generalized minimum aberration has been made.      

城市政府“服务型管理”模式研究

城市管理水平的提高是城市"质"、"量"发展的必然要求,论文从城市管理的公共服务属性出发,提出了城市政府"服务型管理"的基本理念,并从城市管理的目标系统、组织体系、管理方法、控制机制四个模块对"服务型管理"模式的构建展开研究.最后,论文还对"服务型管理"的原则进行了探讨.     

科技计划项目评审中项目与专家精准匹配的技术实现

针对科技计划项目评审中项目与专家匹配效率低、效果差的情况,提出构建包含向量空间模型与协同过滤模型的专家智能匹配模型。在提取评审项目组与专家信息特征的基础上,通过向量空间模型产生专家匹配列表,并通过协同过滤模型对匹配列表进行调整优化,从而得到项目与专家匹配结果。以广东省科技计划项目数据为例,开展实验并对模型进行验证,实验结果准确率达97.6%,匹配效果良好。     

中部地区与发达地区高校产学研合作绩效比较研究

基于高校产学研合作框架,从产学研合作规模、合作水平及科技成果转化能力3个维度构建高校产学研合作绩效评价体系。以2011-2015年中部地区的湖北、安徽、河南和湖南,发达地区的上海、广东和江苏等省市相关数据为样本,采用省际间横向比较方法,比较中部地区与发达地区高校产学研合作绩效。结果显示,发达地区高校产学研合作绩效在3个维度上均好于中部地区, 湖北、江苏两省高校产学研合作绩效分别在中部地区和发达地区领先;科技成果转化能力弱是中部地区高校产学研合作绩效的制约因素。由此,针对当前主要问题提出系统性改进建议。