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   138882篇
  免费   3897篇
  国内免费   15篇
财政金融   26219篇
工业经济   11629篇
计划管理   22308篇
经济学   30060篇
综合类   1575篇
运输经济   985篇
旅游经济   2508篇
贸易经济   23868篇
农业经济   6249篇
经济概况   17094篇
信息产业经济   7篇
邮电经济   292篇
  2021年   852篇
  2020年   1637篇
  2019年   2397篇
  2018年   2382篇
  2017年   2588篇
  2016年   2737篇
  2015年   2129篇
  2014年   3434篇
  2013年   15370篇
  2012年   4254篇
  2011年   4245篇
  2010年   3800篇
  2009年   4380篇
  2008年   4000篇
  2007年   3367篇
  2006年   3654篇
  2005年   3651篇
  2004年   3186篇
  2003年   2967篇
  2002年   2898篇
  2001年   2730篇
  2000年   2671篇
  1999年   2513篇
  1998年   2386篇
  1997年   2423篇
  1996年   2257篇
  1995年   2062篇
  1994年   2075篇
  1993年   2039篇
  1992年   2112篇
  1991年   2049篇
  1990年   1893篇
  1989年   1711篇
  1988年   1636篇
  1987年   1652篇
  1986年   1743篇
  1985年   2533篇
  1984年   2414篇
  1983年   2216篇
  1982年   2076篇
  1981年   2009篇
  1980年   1960篇
  1979年   1925篇
  1978年   1682篇
  1977年   1639篇
  1976年   1408篇
  1975年   1303篇
  1974年   1194篇
  1973年   1190篇
  1972年   896篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
931.
Widely publicized reform programs for East Europe which emphasize rapid privatization are questioned on the grounds that structural changes to assure workable competition take precedence and will take years. A mix of deconcentrated state, cooperative, worker-owned, private, and foreignowned business can be workable. Import competition and antitrust legislation have auxiliary roles.  相似文献   
932.
In this paper we compare alternative asymptotic approximations to the power of the likelihood ratio test used in covariance structure analysis for testing the fit of a model. Alternative expressions for the noncentrality parameter (ncp) lead to different approximations to the power function. It appears that for alternative covariance matrices close to the null hypothesis, the alternative ncp's lead to similar values, while for alternative covariance matrices far from Ho the different expressions for the ncp can conflict substantively. Monte Carlo evidence shows that the ncp proposed in Satorra and Saris (1985) gives the most accurate power approximations.  相似文献   
933.
This article examines innovation in the securities industry with the central objective of identifying factors that separate innovators from non-innovators. Akira Iwamura and Vijay Jog report results based on their survey of corporate finance vice presidents or CEO's of 43 investment houses from around the world. They conclude that innovative companies seem to be larger and have a well-defined strategy, with management defining the focus of the business. In addition, the firms have developed better communication channels, both internally and with their customers. Yet, the most significant difference that separates innovators from non-innovators is their management of the idea generation process, including concept generation and management's support. Innovators tend to approach idea generation in the following ways: they employ a variety of idea sources, both internal and external; they assign a specific person or group to be in charge of developing new ideas; they encourage employees at all levels to generate new ideas; they use a variety of innovative techniques to stimulate creativity; they reward their employees by non-monetary means; and they encourage group-level participation in evaluation decisions.  相似文献   
934.
If a tax on energy affects the demand for a nondurable good, the stock of a durable good, and the proportion of the energy consumption per unit of service of the durable good, an integrated approach for investigating consumer demand for durables and nondurables is required. The purpose of this paper is to employ the concept of a variable expenditure function with quasi-fixed durable goods as arguments in order to derive a demand system for nondurable goods in prices of the nondurables, in the stocks of durables, and in variable expenditure. From the envelope condition desired stocks of durables can be calculated and investment demand for durables can be determined. For an application we choose a variable expenditure function based on the almost ideal demand specification, and evaluate alternative environmental policy measures using the equivalent variation for comparing the welfare effects.  相似文献   
935.
936.
Abstract. The use of CGE models has gained much popularity among policy analysts in LDCs and there is a fast growing body of literature on this area of economics. In this survey, the advantages of general equilibrium approach over partial equilibrium approach in analysing a wide range of policy issues are highlighted. The evolution of CGE modelling is discussed and more than 60 CGE applications related to different policy issues in LDCs are surveyed. This comprehensive survey shows that the CGE models have become quite popular analytical tools among policy analysts in LDCs over the last decade or so. The debate in the economic profession regarding the value and appropriateness of using CGE models for policy analysis is examined in the final section of this paper. Some of the criticisms levelled at CGE models are discussed and it is argued that despite this criticism such models are capable of providing insight into important policy problems.  相似文献   
937.
A negative relationship between corporate leverage and tax shields has been predicted because a large nondebt tax shield reduces the expected value of interest tax savings and lessens the advantage of debt financing. Previous studies, however, have provided inconclusive and contradictory evidence on whether nondebt tax shields crowd-out debt financing. The analysis herein relies on unique constructs of discounted depreciation tax shields and presents evidence that crowding-out does not occur. Furthermore, it is shown that contradictory inferences may result from analysis of annual tax depreciation deductions instead of discounted tax shields. The findings suggest that firms with substantial cash flow from depreciation exploit their higher debt capacity by maintaining a capital structure with significantly more debt than otherwise.  相似文献   
938.
939.
This article looks, with humor, at the role of black economists in academia and in the economics profession.  相似文献   
940.
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