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   23360篇
  免费   500篇
财政金融   4121篇
工业经济   1640篇
计划管理   4051篇
经济学   5490篇
综合类   246篇
运输经济   179篇
旅游经济   366篇
贸易经济   3870篇
农业经济   1154篇
经济概况   2666篇
信息产业经济   3篇
邮电经济   74篇
  2023年   115篇
  2021年   167篇
  2020年   307篇
  2019年   483篇
  2018年   517篇
  2017年   549篇
  2016年   533篇
  2015年   359篇
  2014年   582篇
  2013年   2481篇
  2012年   792篇
  2011年   830篇
  2010年   716篇
  2009年   813篇
  2008年   746篇
  2007年   646篇
  2006年   625篇
  2005年   547篇
  2004年   474篇
  2003年   482篇
  2002年   428篇
  2001年   509篇
  2000年   458篇
  1999年   419篇
  1998年   475篇
  1997年   429篇
  1996年   428篇
  1995年   363篇
  1994年   374篇
  1993年   359篇
  1992年   366篇
  1991年   381篇
  1990年   350篇
  1989年   260篇
  1988年   267篇
  1987年   274篇
  1986年   251篇
  1985年   366篇
  1984年   362篇
  1983年   335篇
  1982年   291篇
  1981年   288篇
  1980年   292篇
  1979年   280篇
  1978年   229篇
  1977年   184篇
  1976年   184篇
  1975年   164篇
  1974年   151篇
  1973年   150篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
22.
The historic focus of new products research has been on the ability of new products to enhance the profitability and competitive position of the innovating firm. In this article, Timothy Devinney shows that there exists an overlooked and potentially significant side effect associated with new product innovations: financial risk changes. He reports that significant financial risk changes occurred in approximately 50% of the new product announcements he examined. The magnitude of these financial risk changes translates into overestimates or underestimates of the firm's cost of capital by 17% to 18% and is strongly and positively related to the size of the firm and the firm's new product innovation activity.  相似文献   
23.
Summary In The Netherlands public debt management is in the hands of the budgetary policy-maker, whose recourse to the capital market can exceed or fall short of the total borrowing requirement in order to absorb or create liquidity. The conduct of that policy since the early 1960's is analyzed in this paper, emphasizing the importance of medium-term control over the public finances as a prerequisite for the ability of debt management to make a flexible contribution to monetary policy. During the 1960's this condition was satisfied and debt management followed a stable countercyclical pattern which, however, was abandoned after the early 1970's as the public finances swung into substantial disequilibrium.The author thanks J. Boughton, L. Bovenberg, D. Hendry, P. Masson, J. Muellbauer, and the referees for comments on earlier versions. However, the views expressed are his alone and do not necessarily represent those of the International Monetary Fund.  相似文献   
24.
25.
In this paper we develop a vintage model to gain a better understanding of the semiconductor industry and its role in recent U.S. productivity gains. Unlike previous work, in our model the observed price declines of individual chips are driven by the introduction of better vintages rather than by learning economies. Dominated chips, nonetheless, continue to be produced, for a time, due to sunk investments in chip‐specific production equipment. The model lends partial support to Jorgenson's hypothesis that an exogenous increase in Moore's Law could have generated the more rapid price declines, and faster productivity growth, seen after 1995.  相似文献   
26.
27.
A subclass of monotonic transferable utility (T.U.) games is studied: average monotonic games. These games are totally balanced. We prove that the core coincides with both the bargaining set à la Davis and Maschler and the bargaining set à la Mas-Colell. To obtain this result a technique based on reduced games is used. Journal of Economic Literature Classification Number: C71  相似文献   
28.
29.
The purpose of this study was to assess the basis behavior of the Live Cattle Futures contract at the Chicago Mercantile Exchange (CME) before and after the 1995 contract changes. Additionally, an alternative method of basis calculation utilizing weighted mean futures prices versus settlement futures prices was compared to determine which method provides a better representation of the basis level. Within a regression model with heteroskedascity error framework, we found that the level of nearby basis in the period after June 1995 has shifted lower and the average monthly open interest of net commercial long positions has substantially increased after the contract modifications. These empirical results are consistent with the notion that more long activity entered the market in response to the contract modifications. Additionally, an alternative (new) measure of basis calculation (cash price minus weighted mean futures price) produced similar results to two other commonly used measures. In conclusion, the 1995 contract changes have neither increased nor decreased the volatility of live cattle basis. © 2004 Wiley Periodicals, Inc. Jrl Fut Mark 24:557–590, 2004  相似文献   
30.
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