An empirical analysis of strategy types

Using the PIMS SPIYR data base, which pools cross-section and timeseries data, an empirical study to identify business strategy types was undertaken. Using a two-stage methodological approach combining principal component and cluster analysis on both a consumer products and an industrial products data base, two sets of strategy typologies were identified. Six strategy types were identified for consumer products: (1) harvest, (2) builder, (3) cashout, (4) niche or specialization, (5) climber, and (6) continuity. For industrial products, four strategy types were identified: (1) low commitment, (2) growth, (3) maintenance, and (4) niche or specialization. A discussion of the characteristics of each strategy type is offered.     

中国的经济结构、增长速度与能源效率

从我国能源利用效率变动的历史轨迹可以发现,2000-2005年我国单位GDP能源消耗呈上升趋势.能耗上升的主要原因:从经济结构的角度来看,主要是高耗能产业发展加速,能源消费向高耗能行业集中;国际产业分工低端化,工业增加值率下降;在能源进口不断增长的同时,高载能产品出口大幅度增长.从经济增长的角度来看,速度过快,超过我国经济增长潜力,导致能源过度投入.为提高我国能源利用效率,应采取必要的政策和法律措施:把提高能源与资源利用效率、减少污染作为经济结构调整的重要标准;运用宏观调控手段,保持经济的适度增长;完善能源价格体系,充分发挥价格税收的调节作用;把提高能源利用效率作为自主创新和技术进步的重要目标;运用法律与行政手段,加强能源生产与消费的外部性监管.     

并网式环保LED广告牌设计与分析

综合并网发电控制技术和LED的并网式环保LED广告牌,运用铅酸蓄电池,以太阳能为主、市电为辅的供、放电控制系统,通过光控和计时管理控制技术,能实现白天充电,晚上放电,智能控制整个工作过程。该系统利用了太阳能和LED节能环保的特点,具有较强的推广价值。     

基于有效集检验CAPM对中国股票市场的有效性

资本资产定价模型(CAPM)有效性的主要假设是市场组合位于全局均值-方差有效集上,有效集理论可用来对CAPM的有效性进行检验.本文利用沪深股市1991～2008年的数据对CAPM在中国股票市场的有效性进行了检验,综合检验的结果表明:中国股票市场趋于有效.     

Analysis of China＇s Renewable Energy Development under the Current Economic and Technical Circumstances

At present, the development of renewable energy relies mainly on government support. The government invests in a considerable number of projects to improve public welfare and to assist in poverty relief If China is to replace fossil fuels on a large scale with renewable energy sources, the production costs and prices of renewable energy must be brought down. All countries are facing the challenge of moving to a more secure and low-carbon energy system without weakening economic and social development. In this regard, China is facing an even greater challenge in terms of economic cost, as cheap coal remains the main energy form. Technical innovation and industrialization in the area of renewable energy is an important means of lowering cost. China is in for a period of high-speed development of its economy and the rising demand for energy is irreversible. If the technical progress and development speed of renewable energy lags behind the growth in demand, it will be difficult to realize the improvement of its energy structure.     

郊区到城市的转变——以长沙市都市区内小城镇的发展为例

通过对长沙市都市区内小城镇发展状况的剖析,指出在长株潭城市群成为全国资源节约型和环境友好型社会建设综合配套改革试验区的背景条件下,长沙都市区内的小城镇面临良好的发展机遇,同时也面临一系列的问题,并从规划层面提出建议,以期促进其由郊区向城市的成功转变。     

项目投资评价中期权理论的应用

本文通过引入期权理论和贝叶斯理论,弥补传统的项目投资决策方法的不足之处,提出了种改进的期望净现值法。     

On the benefits of party competition

We study the role of parties in a citizen-candidate repeated-elections model in which voters have incomplete information. We first identify a novel “party competition effect” in a setting with two opposing parties. Compared with “at large” selection of candidates, party selection makes office-holders more willing to avoid extreme ideological stands, and this benefits voters of all ideologies. We then allow for additional parties. With strategic voting, citizens benefit most when the only two parties receiving votes are more moderate. With sincere voting, even with three parties, extreme parties can thrive at the expense of a middle party; and whether most citizens prefer two or three parties varies with model parameters.     

区域经济中地方政府行为的博弈分析——以京津冀地区为例

引入博弈论方法来研究京津冀三地的区域合作问题,把京津冀三方行政主体看作博弈的局中人,关注其中的"核心"问题--三方都能接受的利益分配方案、如何分配合作利益、如何建立有效的磋商机制以及协调机制的可行性与有效性.同时,提出应当在区域补偿、区域发展、产业布局三个方面寻求政策的改善.