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41.
本文介绍了2006年诺贝尔经济学奖得主埃德蒙·菲尔普斯的主要理论贡献。他在宏观经济政策跨期权衡分析、“黄金律”与经济增长、宏观经济政策的“短期—长期”分析、“自然率”、构建宏观经济学的微观基础,以及结构性萧条与繁荣等诸多领域进行了开创性的研究。菲尔普斯的理论和主张对西方经济理论和经济政策的研究都有十分重大的影响,对我国宏观经济问题和政策的研究有一定借鉴意义。 相似文献
42.
邢源源 《对外经济贸易大学学报》2007,(1):69-72
技术贸易壁垒已成为中美贸易摩擦的最主要原因之一。本文拓展了格罗斯曼和海普曼的关税模型.对美国对华贸易技术壁垒进行政治经济学分析,指出贸易技术壁垒是美国政府与相关利益集团博弈的结果,其存在具有必然性和长期性,进而提出对我国政府、企业、行业协会的政策建议。 相似文献
43.
Noisy chaotic dynamics in commodity markets 总被引:2,自引:1,他引:2
Catherine?Kyrtsou Walter C.?LabysEmail author Michel?Terraza 《Empirical Economics》2004,29(3):489-502
The nonlinear testing and modeling of economic and financial time series has increased substantially in recent years, enabling us to better understand market and price behavior, risk and the formation of expectations. Such tests have also been applied to commodity market behavior, providing evidence of heteroskedasticity, chaos, long memory, cyclicity, etc. The present evaluation of futures price behavior confirms that the resulting price movements can be random, suggesting noisy chaotic behavior. Prices could thus follow a mean process that is dynamic chaotic, coupled with a variance that follows a GARCH process. Our conclusion is that models of this type could be constructed to assist in forecasting prices in the short run but not over long run time periods.First version received: June 2001/Final version received: March 2003 相似文献
44.
45.
Use of biofuels diminishes fossil fuelcombustion thereby also reducing net greenhousegas emissions. However, subsidies are
neededto make agricultural biofuel productioneconomically feasible. To explore the economicpotential of biofuels in a greenhouse
gasmitigation market, we incorporate data onproduction and biofuel processing for thedesignated energy crops switchgrass,
hybridpoplar, and willow in an U.S. AgriculturalSector Model along with data on traditionalcrop-livestock production and processing,
andafforestation of cropland. Net emissioncoefficients on all included agriculturalpractices are estimated through crop growthsimulation
models or taken from the literature. Potential emission mitigation policies ormarkets are simulated via hypothetical carbonprices.
At each carbon price level, theAgricultural Sector Model computes the newmarket equilibrium, revealing agriculturalcommodity
prices, regionally specificproduction, input use, and welfare levels,environmental impacts, and adoption ofalternative management
practices such asbiofuel production. Results indicate no rolefor biofuels below carbon prices of $40 perton of carbon equivalent.
At these incentivelevels, emission reductions via reduced soiltillage and afforestation are more costefficient. For carbon
prices above $70,biofuels dominate all other agriculturalmitigation strategies. 相似文献
46.
Hakan Demirtas 《Statistica Neerlandica》2004,58(4):466-482
In this article, we demonstrate by simulations that rich imputation models for incomplete longitudinal datasets produce more calibrated estimates in terms of reduced bias and higher coverage rates without duly deflating the efficiency. We argue that the use of supplementary variables that are thought to be potential causes or correlates of missingness or outcomes in the imputation process may lead to better inferential results in comparison to simpler imputation models. The liberal use of these variables is recommended as opposed to the conservative strategy. 相似文献
47.
浅析远程监控的数据传输 总被引:3,自引:0,他引:3
文章论述了远程监控系统数据传输技术的重要性以及常用的几种实现方式,并对其优缺点进行了比较和分析。文中分析了利用全球移动通信系统(GSM)进行数据传输的优越性,并介绍了GSM传输的3种方式的特点,各自的实现方式,最后展望了远程监控数据传输的发展前景。 相似文献
48.
On a clear day you might see an environmental Kuznets curve 总被引:1,自引:0,他引:1
We shed some new light on the Environmental Kuznets curve (EKC) and show how it can be viewed as a particular form of equilibrium
relationship, where technology and preference parameters determine the shape of the curve. In contrast to most of the literature
on the EKC, we estimate a theoretically consistent model on long-run data (Swedish sulfur emission, covering the period 1900–2002).
Furthermore, we test and date structural change. The model suggests four regimes, 1900–1918, 1919–1933, 1934–1967 and 1968–2002,
generating four rather different patterns for pollution over time. The policy-conclusions are consonant with Pearce’s general
view about the EKC: there is no theoretical presumption that it has an inverted U shape, nor should any country try to “grow
out of the environmental problems” without analyzing the benefits and costs of so doing. 相似文献
49.
Diego Martinez‐Lopez 《International Review of Applied Economics》2006,20(4):411-423
Public investment constitutes one of the main instruments of regional policies. The existence of a direct link between infrastructure and regional income per capita is usually accepted. Literature also describes a positive effect of public investment on private capital accumulation. This paper seeks to provide new empirical evidence on this latter relationship for the case of Spanish regions over the period 1965–1997 using panel data methodology. The results show a positive effect of productive and social public investment (especially in education) on private investment. The spillover effects generated by the productive infrastructures located in other regions do not seem to encourage the private investment in neighbouring regions. Public consumption and interest rate exert a negative influence on private capital accumulation. These results are robust to changes in the econometric specification. 相似文献
50.
导致企业“短寿”的四大战略管理陷阱 总被引:1,自引:1,他引:1
企业"短寿"的原因很多,简直不胜枚举。我们这里探讨的是在企业战略管理中有可能危及企业生存的四种倾向:追逐利润、追求规模、人才匮乏和盲目多元化。实践证明,绝大多数"短寿"的企业在其"生存期"都可找到以上管理行为的影子。尤其悲哀的是:这些"短寿"陷阱在当初是作为企业的战略目标而被追求之,殊不知,其追求力度越大、追求时间越久,企业离"寿终正寝"就越近。本文的目的是提醒企业经营者时刻警惕这些可能造成企业"短寿"的战略管理陷阱。 相似文献