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11.
石油是关系国家经济安全的重要战略物资,本文通过对我国石油进出口贸易一些流量指标的分析,发现:(1)石油净进口量过大,进口依存度偏高,并有逐年递增的趋势;(2)原油进口的地区集中度偏高,不利于石油资源供应稳定;(3)国际油价持续高企,对国内经济稳定造成威胁。并据此提出了相关政策建议。 相似文献
12.
张树彬 《吉林省经济管理干部学院学报》2003,17(5):17-18
中国是世界上最大的发展中国家,由于现代工农业生产而造成了严重的环境污染,尤其是大量使用农用化学品所导致的生态失调与环境破坏,已严重威胁到人类生存环境及生活健康。今后社会发展必须大力提倡与推广无公害、无污染的清洁生产,全面实现生产的"零污染"与废物的"零排放"、保护环境与追求生态和谐的发展目标。 相似文献
13.
In this paper we introduce a complete duality theory based on directional distance functions. This duality theory parallels the duality theory based on radial distance functions in Färe and Primont (1995). 相似文献
14.
近10年来长三角的政府公共投资(分配)过多地流向了上海、苏州、杭州、南京等核心城市,使这些城市的人均公共资本拥有量大幅上升,从而引发了其边际生产率递减情况的发生。但它们的资本利用效率或技术创新水平没有明显提升(或下降),不足以抵消其资本边际生产率下降的趋势。对这些大城市的经济发展来说,公共投资对其经济增长的意义已经在数量上表现得不明显,但对正处于经济快速增长期且资本边际生产率呈递增态势的长三角外缘中小城市而言,公共投资却有着积极意义。 相似文献
15.
We consider whether oil prices can account for business cycle asymmetries. We test for asymmetries based on the Markov switching
autoregressive model popularized by Hamilton (1989), using the tests devised by Clements and Krolzig (2000). We find evidence
against the conventional wisdom that recessions are more violent than expansions: while some part of the downturn in economic
activity that characterises recessionary periods can be attributed to dramatic changes in the price of oil, post-War US economic
growth is characterized by the steepness of expansions.
First Version Received: December 2000/Final Version Received: September 2001 相似文献
16.
World oil depletion, including natural gas liquids, was modelled in the past by many authors. Recently, Guseo and Dalla Valle have introduced and Guidolin has applied a new approach following perturbed life-cycle diffusion models. Here we examine joint effects of economic and strategic or technological interventions using a Generalized Bass Model (GBM). Statistical analysis takes into account three different hierarchical levels: natural diffusion, long memory interventions and stochastic components. The main results confirm the statistical significance of historical 1970s shocks and highlight a strong long memory effect due to an increase in oil production after World War II. The estimated peak-date, 2007, and the 90% depletion time, 2019, are determined under an equilibrium intervention hypothesis. 相似文献
17.
Jointness in production and farmers' willingness to supply non-marketed ecosystem services 总被引:1,自引:0,他引:1
This paper highlights how farmers' willingness to supply non-marketed ecosystem services (ES) is influenced by whether or not the non-marketed ES are produced jointly with agricultural products. When marketed products and non-marketed ES share some production inputs the production relationships between the two may be complementary, competitive or substitutive. Using a cost minimization framework, it is shown how complementary relationships lead to costless voluntary provision of non-marketed ES (typically the case for ES that are supportive of provisioning ES for marketed farm products). It is also shown how competitive production relationships lead to provision of non-marketed ES at lower cost than when non-marketed ES are direct substitutes for farm products or are produced outside of agriculture. The paper closes by showing how the minimum willingness to accept (WTA) payment for ES that are complementary/competitive is less than or equal to the minimum WTA for the same ES produced in substitute or independent production relationships. 相似文献
18.
Summary. An economy with two dates is considered, one state at the first date and a finite number of states at the last date. Shareholders determine production plans by voting - one share, one vote - and at
-majority stable stock market equilibria, alternative production plans are supported by at most
percent of the shareholders. It is shown that a
-majority stable stock market equilibrium exists if
where S is the number of states at the last date and J is the number of firms. Moreover, an example shows that
-majority stable stock market equilibria need not exist for smaller
s.Received: 23 December 2002, Revised: 14 June 2004, JEL Classification Numbers:
D21, D52, D71, G39.
Correspondence to: Hervé CrésThe authors are grateful to an anonymous referee for helpful comments and suggestions. Financial support from the Danish Research Councils and hospitality of HEC is gratefully acknowledged by Mich Tvede and support from Fondation HEC is gratefully acknowledged by Hervé Crés. 相似文献
19.
20.
上市公司会计信息生产模式改革的经济学思考 总被引:3,自引:0,他引:3
本文基于经济学的角度,从契约理论所决定的会计本质、会计信息市场失灵和会计管制等方面,探讨了改革上市公司现行会计信息生产模式的必要性,并且提出会计信息生产社会化是解决各种会计难题的根本途径。 相似文献