工作记忆训练:研究现状及发展前景

工作记忆能够预测个体在认知加工任务中的表现,工作记忆容量具有相对稳定的特征,但近年来研究表明工作记忆容量可以通过训练得到改进。工作记忆训练直接影响额叶皮层、颅顶部皮层等大脑皮层活动以及中枢系统多巴胺受体浓度。工作记忆训练效应可以对未经过训练的工作记忆任务产生迁移,与工作记忆相关的神经网络亦能通过训练获得发展。工作记忆训练可以帮助个体减小因低工作记忆容量对学业成就、日常生活带来的影响。     

Additional Empirical Evidence on Real Convergence: A Fractionally Integrated Approach

We examine the real convergence hypothesis for 14 OECD countries looking at the fractional order of integration of the differences of real GDP per capita in these countries with respect to the United States. Using parametric procedures, the results vary depending on how we specify the I(0) disturbances. If they are white noise, convergence is achieved for Canada and Australia, and with autocorrelated disturbances, this hypothesis is satisfied for France and the Netherlands. However, allowing for a break at World War II, evidence of convergence is obtained for all countries. JEL no. C32, O41     

构建高校党员先进性教育长效机制的思考

该文认为，要使高校的党员永葆先进性，就要从动力机制入手，构建党员先进性教育的长效机制。构建动力推动机制，强化党员永葆先进性的主动性；构建压力督助机制，形成党员永葆先进性的自觉性；构建耐力恒温机制，强化党员永葆先进性的坚定性。     

Stochastic uncoupled dynamics and Nash equilibrium

In this paper we consider dynamic processes, in repeated games, that are subject to the natural informational restriction of uncoupledness. We study the almost sure convergence of play (the period-by-period behavior as well as the long-run frequency) to Nash equilibria of the one-shot stage game, and present a number of possibility and impossibility results. Basically, we show that if in addition to random experimentation some recall, or memory, is introduced, then successful search procedures that are uncoupled can be devised. In particular, to get almost sure convergence to pure Nash equilibria when these exist, it suffices to recall the last two periods of play.     

“珑”、“琥”构形成分蕴含的文化信息

在《说文解字》中的“珑”从玉、从龙,“琥”从玉、从虎,这种构形成分蕴含着中国传统思想观念中对龙、虎的特殊情感,对玉的神秘认识。     

Exports,Supply Constraints and Growth: An Investigation using Regional Data

In this work we first model the role of demand‐ and supply‐side factors (labour market adjustment, productive efficiency) in explaining economic growth. Empirically testing the model, we evaluate why different growth regimes may appear in the 20 Italian administrative regions. This exercise uses a two‐stage econometric approach. Estimates for the elasticity of manufacturing output to exports are obtained from regional time series: a significant long‐run relationship indicates the existence of a demand‐constrained growth regime. We then ascertain whether the regional dispersion of supply‐side factors has an impact on the regional dispersion of growth regimes. The empirical evidence supports our expectations of strong regional differences. Southern regions are less likely to display demand‐constrained regimes. In explanation of these differences, second‐stage analysis reveals that a strong role is played by such efficiency‐enhancing factors as technological innovation, bank diffusion and ‘social capital’. No role is found for labour market rigidities.     

建立安全生产长效机制实现渔业经济安全发展

本文从我国海洋渔业安全管理的现实需要出发，着眼于建立安全生产长效机制，提出了海洋渔业安全生产长效机制建设的指导思想，以及建立渔业安全法律法规框架、完善监管体制、建立防控体系、应急救援体系、培训教育体系、投入保障机制等六个方面的关键措施。     

2011年上半年国际金融市场运行综述

2011年上半年,美元总体走弱;美元短期利率下降,欧元、英镑短期利率上升,日元短期利率基本走平;主要国家中长期国债收益率先升后降;欧美主要股指振荡走高。     

基于KMV模型的中国短期融资券信用风险评级研究

针对短期融资券主体信用评级未能完全准确地反映出短期融资券信用风险的问题,本文引入信用风险计量的KMV模型,运用Matlab软件计算出短期融资券的违约距离,按照违约距离的大小通过聚类分析将样本划分为六组。在此基础上,以信用利差表示投资者对短期融资券信用风险的认可,将各组信用利差与其违约距离对应起来,对各组的信用利差进行方差分析,结果显示各组之间的差异非常显著,表明分组状况比较理想,按违约距离判断短期融资券的信用风险是合适的,实现了对短期融资券的信用风险评级。     

我国证券投资基金业绩持续性研究

基于2006~2009年的周度数据,本文首先使用修正的R/S方法实证分析开放式投资基金业绩的长期持续性;其次使用Spearman自相关系数方法计算了样本基金的短期持续性;并提出我国证券投资基金可能存在持续性时间阈的概念,利用样本数据对假设进行实证检验,计算出各只基金业绩持续性的时间阈,并分析了持续性时间阈对投资者的重要意义。