首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2228篇
  免费   215篇
  国内免费   120篇
财政金融   58篇
工业经济   115篇
计划管理   227篇
经济学   484篇
综合类   237篇
运输经济   10篇
旅游经济   35篇
贸易经济   224篇
农业经济   205篇
经济概况   240篇
水利工程   728篇
  2024年   12篇
  2023年   61篇
  2022年   105篇
  2021年   98篇
  2020年   95篇
  2019年   72篇
  2018年   71篇
  2017年   79篇
  2016年   90篇
  2015年   99篇
  2014年   145篇
  2013年   141篇
  2012年   176篇
  2011年   217篇
  2010年   146篇
  2009年   149篇
  2008年   148篇
  2007年   140篇
  2006年   131篇
  2005年   101篇
  2004年   60篇
  2003年   46篇
  2002年   44篇
  2001年   33篇
  2000年   16篇
  1999年   22篇
  1998年   5篇
  1997年   8篇
  1996年   21篇
  1995年   11篇
  1994年   7篇
  1993年   6篇
  1992年   1篇
  1989年   2篇
  1985年   2篇
  1984年   1篇
  1983年   1篇
  1982年   1篇
排序方式: 共有2563条查询结果,搜索用时 359 毫秒
191.
东亚国家或地区战后先后进入持续的经济高速增长阶段,在不到半个世纪的时间内就完成了由工业化起步到基本实现工业化的转变。从经济史学的角度对日本和“亚洲四小龙”为代表的东亚地区的产业结构发展历程的分析表明,政府在造就奇迹的过程中扮演了不可或缺的角色。  相似文献   
192.
美国对华反补贴政策的演变与内在动因分析   总被引:2,自引:0,他引:2  
2006年11月21日,美国对我国的出口产品发起了首例反补贴调查,2007年2月2日,美国商务部又就我国的补贴问题向世界贸易组织提起了申诉。本文从考察美国对华反补贴政策立场的演变入手,着重分析了美国对华实施反补贴调查的内在动因,并就我国应采取的相关对策与措施,提出了一些建议。  相似文献   
193.
In this study, a recently revised version of the channel evolution model, named the Stream Evolution Model (SEM), was applied to the upper North Fork Toutle River disrupted by the deposition of a 2.5‐km3 debris avalanche during the catastrophic eruption of Mount St. Helens in 1980. The results show that, in the first few years following the eruption, upstream channel reaches generally incised, evolving in SEM Stage 4 (i.e. degradation and widening), while downstream reaches aggraded, evolving in Stage 5 (i.e. aggradation and widening). However, starting in the late‐1980s, this simple pattern was disrupted by incision in the downstream reaches, which seemed to propagate upstream. Since the 1990s, lateral channel adjustments have become predominant as rates of vertical adjustment have slowed and river valley top widths relaxed to asymptotic values. Spatial and temporal sequences of channel evolution have tended to follow the sequences of stages expected according to the SEM, although these sequences have been frequently disrupted by renewed incision, secondary cycles of adjustment and the impacts of local geologic, geomorphic and hydraulic conditions. Within the quasi‐full SEM cycles, stages 4 and 5 were sometimes repeated, while stage 6 (quasi‐equilibrium) was sometimes omitted, and stage 8 (anabranching) only occurred in the downstream braided/anabranching reaches. According to the SEM, degradation, widening and lateral activity (stages 4 and 7) are forecast to continue until transverse valley profiles and channel planforms stabilize and floodplain and terrace surfaces are fully colonized by vegetation. Copyright © 2017 John Wiley & Sons, Ltd.  相似文献   
194.
Some models in evolutionary economics rely on direct analogies to genetic evolution, assuming a population of firms with routines, technologies, and strategies on which forces of diversity generation and selection act. This narrow conception can build upon previous findings from evolutionary biology. Broader concepts of evolution allow many or just one adaptive entity, instead of necessarily requiring a population. Thus, an institution or a society can also be understood as an evolutionary entity. Both the narrow and broad approaches have been extensively used in the literature, albeit in different literature traditions. I provide an overview of the conception and development of both approaches to evolutionary modeling, and argue that a generalization is needed to realize the full potential of evolutionary modeling.  相似文献   
195.
结合信息技术对中国城市影响的实际,从信息技术影响下城市空间相互作用方式、空间结构的构成要素及其影响因素的变化出发,对信息时代国内城市功能特征进行研究变得尤为重要.全球化、柔性化、复合化、差异化已成为信息时代城市功能的主要特征;信息流和接入信息的能力变得尤为重要;每个城市都成为全球或区域城市网络的一个节点;部分服务的区位选择因此也表现出较大的弹性;城市居住空间分异仍然存在,影响因素越来越复杂.  相似文献   
196.
This paper explores some of the theoretical linkages between Thorstein Veblen and Karl Marx. Special reference is placed Veblen's criticisms of Marx and the Marxist tradition for adhering to the preconceptions of (a) the natural right of labour to the full product, and (b) the teleology of conscious agents directing action towards change. Veblen was incorrect to believe that Marx adhered to the natural right of labour thesis, but he was correct to assert that Marx utilized undesirable teleologies. Overall, however, Veblen was attempting to reformulate and modernise the materialistic conception of history through an evolutionary analysis of institutions. The two thinkers complement each other in important ways, although Veblen's analysis is more evolutionary, collectivist and holistic.  相似文献   
197.
已经举办了21届的全国书市,给图书界留下喜悦和回味,其价值有:为举办地的文化建设带来很大的推动作用;是图书行业交流的盛会;对举办地和参展商具有重要的形象展示作用。同时全国书市也留下些许遗憾和问题,值得书业人深思和研究。未来的全国书市应该办成书会,其功能应该更加多元化。  相似文献   
198.
《Telecommunications Policy》2017,41(10):931-947
Over the past two decades, China’s telecommunications industry has witnessed drastic market reform, steadfast institutionalization, and volatile technological changes, which have driven exponential industry expansion. This paper offers an updated longitudinal and comprehensive review on this reform process on the eve of 5G (the fifth generation mobile communications networks). First, the paper segments the two-decade reform crusade into discernible phases, each of which is embedded with different policy drives. These reform phases are then pattern-matched against the subtleties of the overall institutional, technological, and market backdrop. A series of policy issues are identified through a systematic examination of industry phenomena over the reform course. Finally, the status of research is assessed regarding China’s telecom industry and reform, based on which, knowledge gaps are identified and future research agenda suggested. Conclusions are made regarding future reform and research imperatives. The paper advances the understanding of China’s telecom reform, development, and the underlying policy issues. It updates and expands previous works on similar topics. Overall, this study provides important theoretical, managerial, and policy implications.  相似文献   
199.
This paper studies Carl Menger's theory of the emergence of a commodity money. We propose an interpretation of Menger's learning by imitation process based on the search theoretical formal framework. We show that there exists a tension between the importance of intrinsic properties of commodities and the pure conventional self-fulfilling expectations of agents. This confirms the role of imitation in the emergence of monetary equilibria in search theory. We conclude that Menger's approach may support the idea that the fundamental property of a commodity-money (namely its great liquidity) is the result of its emergence process and not necessarily of its original intrinsic properties.  相似文献   
200.
中国的分税制自实行以来,在各类转移支付的演化过程中,税收返还制度保持了较好的刚性,一般性转移支付的分配规则较为完善,但执行机制普遍较弱,而专项转移支付的分配规则和执行机制均不完善。分析表明,分配规则和执行机制完善与否是中央、地方政府、主管部委以及相关领导者利益博弈的结果,他们之间不同的利益需求及力量对比可能是中国财政转移支付变迁的动因之一,而坚持推进制度化则是16年来转移支付改革的基本逻辑。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号