基于SWOT分析的中国联通3G发展战略探讨

SWOT分析是进行公司战略分析的重要工具。依据对中国联通发展3G战略的SWOT分析,中国联通3G发展战略应定位于专注C网,综合发展,差异服务,规模领先,赶超移动,做强做大。     

城市商圈布局的三维动态模型构建与述评

商贸产业是维系一个城市经济运转的原动力之一,城市商圈是这个经济发展动力的重要载体.本文在吸收西方经典商圈理论模型的基础上,结合我国城市商圈发展现状,从外部环境、内部成长和时间三个维度分析其影响因素,构建了城市商圈布局的三维动态模型,以期对城市商圈布局和城市经营提供一定的现实参考价值.     

三苯基硫膦的合成与表征

以三苯基膦和二甲基二硫醚为反应原料,得到了三苯基硫膦,通过X-射线单晶衍射对其结构进行表征。结果表明:晶体属于单斜晶系,空间群为P2(1)/c。晶胞参数为:Z=4,a=18.342(2),b=9.6269(10),c=18.044(2),α=90.00°,β=106.102(6)°,γ=90.00°,V=3 061.2(6)3;R1=0.1336,wR=0.1420。     

环介导等温扩增技术对锦鲤疱疹病毒的快速检测

为建立一种快速检测锦鲤疱疹病毒(CyHV-3)的环介导等温扩增方法(LAMP),本研究根据GenBank中登录的CyHV-3 TK基因编码区序列设计了LAMP特异性引物,通过优化反应条件,建立了检测CyHV-3的LAMP方法。表明本实验建立的该检测方法具有高灵敏度、高特异性、快速和简便的特性,适用于临床上对锦鲤疱疹病毒3的快速诊断。     

A Sticky Information Phillips Curve for South Africa

Mankiw and Reis propose the Sticky Information Phillips Curve (SIPC) as an alternative to the standard New Keynesian Phillips Curve to address empirical shortcomings in the latter. A SIPC for South Africa is estimated, and we find estimates of information updating probability between 0.69 and 0.81, somewhat higher than suggested by methods using micro‐evidence. Because the estimation requires data on expectations of current period inflation and output gap conditional on sequences of earlier period information sets, we provide a detailed analysis of the impact on our estimates of alternative proxies available in South Africa.     

浅圆仓PH3熏蒸方法的研究

在浅圆仓中进行了PH3熏蒸试验，粮堆内的储粮害虫均被杀死，取得了良好的杀虫效果，达到了环流熏蒸的技术要求。研究表明在浅圆仓内，借助环流装置用HIP粮面施药法是一种经济实用的害虫防治方法。     

International transmission of business cycles: Evidence from dynamic correlations

We exploit dynamic correlations to estimate determinants of output comovement between OECD countries. Trade intensity, financial integration, and specialization patterns have significantly different effects on comovements at different frequencies. This sheds more light on previous results based on statistical filters.     

Imposing local curvature in the QUAIDS

In this paper, we build on Ryan and Wales (1998), Moschini (1999), and Serletis and Shahmoradi (2007) and impose curvature conditions locally on the quadratic Almost Ideal Demand System (AIDS) model of Banks et al. (1997), an extension of the simple AIDS model of Deaton and Muellbauer (1980) that can generate quadratic Engel curves [that is, rank-three demand systems, in the terminology of Lewbel (1991)]. In doing so, we exploit the Slutsky matrix of second order derivatives of the indirect utility function.     

Sudden stops, financial frictions, and labor market flows: Evidence from Latin America

While the aggregate effects of sudden stops and international financial crises are well known, the disaggregated channels through which they work are not well explored yet. In this paper, using job flows from a sectoral panel dataset for four Latin American countries, we find that sudden stops are characterized as periods of lower job creation and increased job destruction. Moreover, these effects are heterogeneous across sectors: we find that when a sudden stop occurs, sectors with higher dependence on external financing experience lower job creation. In turn, sectors with higher liquidity needs experience significantly larger job destruction. This evidence is consistent with the idea that dependence on external financing affects mainly the creation margin and that exposure to liquidity conditions affects mainly the destruction margin. Overall, our results provide evidence of financial frictions being an important transmission channel of sudden stops and in the restructuring process in general.     

The trade-off between innovation and defense industrial policy: A simulation model analysis of the Norwegian defense industry

The paper investigates the trade-off between innovation and defense industrial policy. It presents an agent-based simulation model calibrated for the Norwegian defense industry that compares different policy scenarios and examines the effects of a pending EU market liberalization process. The paper points to two main results. (1) It finds that a pure scenario where national authorities focus on, and provide support exclusively for, either a) international competitiveness or b) national defense and security objectives, is more Pareto efficient than a corresponding mixed strategy where policy makers simultaneously pursue both international competitiveness and defense and security objectives. (2) Under the conditions of the new EU liberalization regime, it finds that a stronger and more visible trade-off will emerge between international competitiveness and national defense and security objectives. Policy makers will have to choose which to prioritize, and set a clear agenda focusing on one of the two objectives.