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   15919篇
  免费   367篇
财政金融   3321篇
工业经济   1194篇
计划管理   2535篇
经济学   3392篇
综合类   168篇
运输经济   129篇
旅游经济   277篇
贸易经济   2619篇
农业经济   720篇
经济概况   1915篇
信息产业经济   2篇
邮电经济   14篇
  2023年   80篇
  2021年   99篇
  2020年   216篇
  2019年   281篇
  2018年   369篇
  2017年   377篇
  2016年   340篇
  2015年   226篇
  2014年   360篇
  2013年   1855篇
  2012年   426篇
  2011年   520篇
  2010年   485篇
  2009年   486篇
  2008年   445篇
  2007年   403篇
  2006年   380篇
  2005年   312篇
  2004年   306篇
  2003年   329篇
  2002年   322篇
  2001年   326篇
  2000年   337篇
  1999年   316篇
  1998年   336篇
  1997年   312篇
  1996年   267篇
  1995年   245篇
  1994年   272篇
  1993年   267篇
  1992年   287篇
  1991年   266篇
  1990年   229篇
  1989年   200篇
  1988年   185篇
  1987年   194篇
  1986年   191篇
  1985年   272篇
  1984年   288篇
  1983年   276篇
  1982年   238篇
  1981年   213篇
  1980年   186篇
  1979年   185篇
  1978年   172篇
  1977年   148篇
  1976年   131篇
  1975年   147篇
  1974年   103篇
  1973年   112篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
The paper hypothesizes that diversification by firms based in the pharmaceutical industry during the 1977-86 time period was primarily undertaken to reduce the risks associated with being dependent upon a technologically dynamic environment. Consistent with this non-efficiency motive for diversification, declining economic performance is predicted. A longitudinal empirical analysis provides support for these propositions.  相似文献   
62.
This paper introduces a simple, yet rich, measure of efficiency changes based on the revenue-generating-ability (RGA) principle. Using this principle, we explain the connections between efficiency changes and the variables, such as pretax profits, interest expense, non-interest expense, profit margins, loan loss provision, and asset quality. These connections are used to explain earnings differences between small and large commercial banks.  相似文献   
63.
Moral agency as victim of the vulnerability of autonomy   总被引:1,自引:0,他引:1  
This paper draws upon a research study of accountants and HR specialists. The study eschewed hypothetical scenarios and focused upon those situations and scenarios that the interviewees defined as causing them ethical concerns. There are two distinct but related issues arising from the paper. The first is that the singular categorisations of moral reasoning attributed to individuals when faced with hypothetical scenarios by many who write on the issue of moral reasoning, did not correspond to the fluidity in moral choices faced by the interviewees as they experienced their unfolding moral dilemmas. The second issue relates to the unwillingness of the interviewees to give voice to their concerns, not only externally, but also within their employing organisations. The tensions within the two cases featured were held in check only by the diminution of the autonomy of the two principal actors. As a consequence, the exercise of moral agency was denied.  相似文献   
64.
This study examines the long memory behavior in gold returns during the post-Bretton Woods period using a new rescaled range technique. Unlike the conventional rescaled range analysis, the new rescaled range analysis is robust to short-term dependence and conditional heteroscedasticity found in the gold data. Statistical results suggest that the long memory behavior in gold returns is rather unstable. When only few observations corresponding to major political events in the Middle East, together with the Hunts event, in late 1979 are omitted, little evidence of long memory can be found.  相似文献   
65.
This study shows that firms in the pharmaceutical industry experience decreasing returns to scale in R & D as the level of R & D expenditures rises. The paper presents the results of our study of the innovative output of 16 pharmaceutical firms over a 19 year period. Given the strong correlation between R & D budgets and firm size, our study suggests the wave of mergers in the industry may yield less innovative productivity than managers expect.  相似文献   
66.
Received March 5, 2001; revised version received August 5, 2002 Published online: April 30, 2003  相似文献   
67.
An Erratum for this article has been published in Journal of Applied Econometrics 18(2) 2003, 249 Previous empirical work on corporate growth rates using cross‐section or short‐panel econometric techniques suggests that growth rates are random but that some degree of mean reversion exists. This means that size differences between firms are transitory. Another, more natural way to explore the long‐run distribution of firm sizes is to examine data on the growth of particular firms over long periods of time. Using a sample of 147 UK firms observed continually for more than 30 years, our conclusions are that growth rates are highly variable over time and that differences in growth rates between firms do not persist for very long. Further, firms show no tendency to converge to either a common size or to a pattern of stable size differences over time. These results are compared and contrasted with standard approaches that suggest that firms reach and maintain stable positions in a skewed size distribution. Copyright © 2002 John Wiley & Sons, Ltd.  相似文献   
68.
The paper considers procedural aspects of land potential estimation when forming tourist and recreation territories allotted for tourist and recreation zones.  相似文献   
69.
Graphical models provide a powerful and flexible approach to the analysis of complex problems in genetics. While task-specific software may be extremely efficient for any particular analysis, it is often difficult to adapt to new computational challenges. By viewing these genetic applications in a more general framework, many problems can be handled by essentially the same software. This is advantageous in an area where fast methodological development is essential. Once a method has been fully developed and tested, problem-specific software may then be required. The aim of this paper is to illustrate the potential use of a graphical model approach to genetic analyses by taking a very simple and well-understood problem by way of example.  相似文献   
70.
We present a theory of capital structure based on the power of shareholders, bondholders and managers to control the incentive conflicts in large corporations. The manager–owner conflict produces a trade-off between inefficiency in the low state and rents in the high state, and the shareholder–bondholder conflict produces under-investment as in Myers [Journal of Financial Economics 19 (1997) 147]. Since managers and bondholders both prefer more efficient actions in the low state, the two conflicts are interdependent. With risk-less levels of debt, there are no shareholder–bondholder agency costs, but managerial control over the incentive-setting process produces excessive rents. With risky debt, shareholders focus more on returns in the high state so that shareholder–bondholder agency costs increase but managerial rents decrease. Efficient levels of debt holder protection facilitate a reduction in manager–owner agency costs that outweighs shareholder–bondholder agency costs, and are decreasing in firm performance. The results are consistent with the separate empirical results relating control to both compensation and leverage, and suggest how future studies can be integrated.  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