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   14952篇
  免费   350篇
  国内免费   13篇
财政金融   2563篇
工业经济   1101篇
计划管理   2574篇
经济学   3197篇
综合类   302篇
运输经济   96篇
旅游经济   287篇
贸易经济   2902篇
农业经济   751篇
经济概况   1493篇
邮电经济   49篇
  2021年   99篇
  2020年   166篇
  2019年   248篇
  2018年   353篇
  2017年   394篇
  2016年   376篇
  2015年   255篇
  2014年   391篇
  2013年   1490篇
  2012年   412篇
  2011年   445篇
  2010年   439篇
  2009年   456篇
  2008年   505篇
  2007年   452篇
  2006年   369篇
  2005年   352篇
  2004年   309篇
  2003年   318篇
  2002年   294篇
  2001年   285篇
  2000年   294篇
  1999年   258篇
  1998年   269篇
  1997年   267篇
  1996年   270篇
  1995年   252篇
  1994年   236篇
  1993年   259篇
  1992年   244篇
  1991年   238篇
  1990年   215篇
  1989年   190篇
  1988年   146篇
  1987年   178篇
  1986年   183篇
  1985年   270篇
  1984年   283篇
  1983年   271篇
  1982年   238篇
  1981年   244篇
  1980年   204篇
  1979年   213篇
  1978年   155篇
  1977年   164篇
  1976年   140篇
  1975年   114篇
  1974年   106篇
  1973年   97篇
  1972年   70篇
排序方式: 共有10000条查询结果,搜索用时 46 毫秒
991.
We examine investment behavior among exchange-listed Korean manufacturing firms before and after the 1997 financial crisis using firm-level panel data. Starting with the standard Q-theory of investment, we augment it by allowing for a sales accelerator and the possibility of cash constraints, categorizing firms based on their age, size and affiliation to an industrial conglomerate (i.e., chaebol). We find that Tobin’s Q is a robust determinant of investment in a pooled sample for 1992–2001, but that it became more important for small firms and less important for chaebol-affiliated firms after the crisis. Investment by chaebol firms also became more sensitive to the availability of internal cash balances after the crisis. We interpret this as reflecting a shift in the Korean economy to a stronger market orientation after the crisis and to a business climate in which the quality of potential projects became more important relative to capital market imperfections in determining the destination of investment funds.  相似文献   
992.
在高分辨阵列测向系统中,均匀圆阵(UCA)是一种广泛使用的阵列结构。利用均匀圆阵的阵列流形的微分几何作为分析工具,对实际中常用的几种均匀圆阵的测向模糊进行了大量的计算机仿真试验,定量地给出了这些阵列的测向模糊方向和相应的秩,揭示了均匀圆阵的测向模糊性能与其阵元数和孔径之间的关系,得出了一些有实际意义的结论。这对工程应用时均匀圆阵的选择和构造具有很强的参考价值和指导意义,可以避免系统设计的盲目性和随意性。  相似文献   
993.
In a static setting, willingness to pay for an environmental improvement is equal to compensating variation. In a dynamic setting, however, willingness to pay may also contain a commitment cost. In this paper we incorporate the dynamic nature of the value formation process into a stated preference study designed to test whether there is an important dynamic component (commitment cost) in stated preference values. The results clearly indicate that stated preference values can contain commitment costs and that these can be quite large: respondents offered the opportunity to delay their purchasing decisions until more information became available were willing to pay significantly less for improved water quality than those facing a now-or-never decision. These results have important consequences for the design and interpretation of stated preference data.  相似文献   
994.
Sustainability assessment methods are primarily aimed at global, national or state scales. However, modelling sustainability at finer spatial scales, such as the region, is essential for understanding and achieving sustainability. Regions are emerging as an essential focus for sustainability researchers, natural resource managers and strategic planners working to develop and implement sustainability goals. This paper evaluates the effectiveness of current sustainability assessment methods - ecological footprint, wellbeing assessment, ecosystem health assessment, quality of life and natural resource availability - at the regional scale. Each of these assessment methods are tested using South East Queensland (SEQ) as a case study. It was selected because of its ecological and demographic diversity, its combination of coastal and land management issues, and its urban metropolitan and rural farm and non-farm communities. The applicability of each of these methods to regional assessment was examined using an evaluation criteria matrix, which describes the attributes of an effective method and the characteristics that make these methods useful for regional management and building community capacity to progress sustainability. We found that the methods tested failed to effectively measure progress toward sustainability at the regional scale, demonstrating the need for a new method for assessing regional sustainability.  相似文献   
995.
Several studies examine the patterns and determinants of entry and exit in manufacturing industries. Not much work exists on entry and exit in international markets. This paper uses Chilean data to analyze the industry‐level determinants of entry and exit in export markets. First, we show as stylized facts that entry and exit rates differ across industries, vary over time, and are positively correlated. Then, we study the main determinants of these patterns. Our econometric analysis shows that within‐industry heterogeneity, measured by differences in productivity or other firm characteristics, has a significant effect on plant turnover in international markets. Our findings reveal that trade costs, factor intensities, and fluctuations in the real exchange rate play a minor role explaining entry and exit. This last result is consistent with hysteresis in international markets.  相似文献   
996.
Faced with a record level of unemployment, the present debate in Germany is to extend the weekly hours of work. In this paper the employment effects of an economy-wide increase in weekly hours are quantified on the basis of a computable general equilibrium model for different specifications of the wage setting rule and the use of additional policy-induced public income. The simulation results back the argument of the opponents of longer working time that not more jobs will be created. However, when the higher tax revenues from GDP growth are used to reduce social security contributions, then the claim of the proponents that more jobs will be created can be supported.  相似文献   
997.
Multinationals and the creation of Chinese trade linkages   总被引:4,自引:0,他引:4  
Abstract.  This paper studies the relationship between multinational firm proximity and the formation of new export connections by private Chinese exporters between 1997 and 2003. The results indicate that growth in the presence of multinational firms is positively associated with the formation of new trade by local Chinese firms. Further exploration suggests that information spillovers may drive this result, as the positive association due to own-industry multinational presence is particularly strong in contexts where information improvements may be the most helpful. Thus, it appears that a growing presence of multinational firms may enhance the export capabilities of local domestic firms.  相似文献   
998.
This article is a tribute to the late Richard Normann, whose call for a “service logic” (Normann, Reframing Business: When the Map Changes the Landscape, Wiley, Chichester, p. 99, 2001) both parallels and enriches service-dominant (S-D) logic (Vargo and Lusch, J. Mark, 68:1–17, 2004a). Like Vargo and Lusch, Normann shifted the focus of the offering from an output to a process of value creation and perceived the firm as an organizer of this process, with the customer as a co-producer, rather than a receiver of value. He also argued that offerings are “frozen knowledge,” similar to Vargo and Lusch’s contention that the basis of exchange is applied operant resources (service) and suggested that the ‘dematerialization’ of resources increases their ‘liquidity’, which allows increased “density” for value creation. Thus, he suggested that firms need to “reframe business”—rethink the logic of value creation—to reveal opportunities in reconfiguring the value constellations of which they are part. This tribute explores these and other similarities and differences between Normann’s work and the evolving S-D logic.  相似文献   
999.
“Service-dominant logic” appears to have found resonance in the marketing community since its introduction as the evolving, “new dominant logic” in the Journal of Marketing (Vargo and Lusch 2004a, Journal of Marketing, 68, 1–17 (January)). But, on occasion, so has the question of whether the concept “service” captures the essence of the new logic. This article addresses the role of “service” as the heart of value-creation, exchange, markets, and marketing, as well as its considerable implications for research, practice, societal well-being, and public policy. The purposes are both to clarify the issues and to foster the continuing dialog around the service-dominant logic for marketing, as well as for other disciplines.  相似文献   
1000.
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