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   17624篇
  免费   606篇
财政金融   3474篇
工业经济   1207篇
计划管理   2860篇
经济学   4028篇
综合类   179篇
运输经济   157篇
旅游经济   268篇
贸易经济   3129篇
农业经济   713篇
经济概况   2194篇
信息产业经济   2篇
邮电经济   19篇
  2023年   147篇
  2021年   154篇
  2020年   300篇
  2019年   362篇
  2018年   555篇
  2017年   632篇
  2016年   554篇
  2015年   337篇
  2014年   484篇
  2013年   2216篇
  2012年   570篇
  2011年   613篇
  2010年   600篇
  2009年   590篇
  2008年   513篇
  2007年   438篇
  2006年   394篇
  2005年   345篇
  2004年   311篇
  2003年   335篇
  2002年   312篇
  2001年   302篇
  2000年   316篇
  1999年   311篇
  1998年   325篇
  1997年   279篇
  1996年   240篇
  1995年   229篇
  1994年   249篇
  1993年   257篇
  1992年   276篇
  1991年   264篇
  1990年   210篇
  1989年   198篇
  1988年   171篇
  1987年   170篇
  1986年   174篇
  1985年   256篇
  1984年   276篇
  1983年   255篇
  1982年   231篇
  1981年   204篇
  1980年   175篇
  1979年   171篇
  1978年   160篇
  1977年   136篇
  1976年   127篇
  1975年   142篇
  1974年   108篇
  1973年   102篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
Game theoretic derivations of competitive strategies in conjoint analysis   总被引:1,自引:0,他引:1  
While conjoint analysis has been applied in a wide variety of different contexts in Marketing, most applications fail to explicitly consider retaliatory reactions from competitors. In this paper, a methodological extension is developed for conjoint analysis by explicitly modeling competition in a game theoretic context. The Nash equilibrium concept is employed to model competitive reactions to produce design, and its implications for reactive product strategies are discussed. The optimal product design problem for each firm is formulated as a nonlinear integer programming problem, which is solved via a specialized branch and bound method combined with a heuristic. In order to compute a Nash equilibrium, a sequential iterative procedure is proposed. The proposed procedure is illustrated under several scenarios of competition using previously published conjoint data.This research has been supported by the Henry Rutgers Research Fellowship, Rutgers University.  相似文献   
122.
In One destiny: Our common future in Africa the author relates, in popular fashion, a series of incidents which convinced him that the basic difference between black and white in South Africa is cultural deep‐seated and the cause of underdevelopment and conflict He develops a circular argument in which world‐view is taken as the root of perceptions, values and activities. The effects of experience and economic and political factors are given secondary importance. This argument cannot accommodate social change and differentiation, and the author tends to concentrate on perceptions and events which he finds morally unacceptable. He gives an unbalanced assessment and an ethnocentric interpretation of African life. Possible reasons for this type of argument are explored and an alternative which takes its departure from the interaction between experience and perception is offered  相似文献   
123.
Five years after the introduction of unified monetary policy in the EMU, some member countries are wondering whether they have ceded too much of their policy-making powers. The fact that National Central Banks no longer carry out sizable expansionary open market or foreign exchange market operations suggests that they face substantially reduced abilities to set economic policy.This paper demonstrates that, in fact, very little power has been yielded: on the fiscal front, the force of such policy initiatives is enhanced by the fixity of the exchange rate. On the monetary front, we show that there is an observational equivalence between all Central Bank actions under fixed exchange rates. This implies that the authorities retain the same amount of policy flexibility as before. So long as they use an alternative form of policy initiative, carrying out what previously would have been characterized as sterilized foreign exchange market operations, their ability to influence the macro performance of their economy is undiminished.  相似文献   
124.
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   
125.
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   
126.
We re‐examine the benefits of using a broader set of research methods to address key questions associated with the resource‐based view (RBV) of the firm. In responding to Levitas and Chi, we consider how research inside organizations can complement and augment research relying on secondary data. Copyright © 2002 John Wiley & Sons, Ltd.  相似文献   
127.
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   
128.
129.
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   
130.
Received March 5, 2001; revised version received August 5, 2002 Published online: April 30, 2003  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