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   40302篇
  免费   556篇
财政金融   6859篇
工业经济   2406篇
计划管理   6667篇
经济学   9497篇
综合类   687篇
运输经济   197篇
旅游经济   355篇
贸易经济   8359篇
农业经济   1174篇
经济概况   3962篇
信息产业经济   46篇
邮电经济   649篇
  2023年   126篇
  2021年   180篇
  2020年   322篇
  2019年   527篇
  2018年   2740篇
  2017年   2517篇
  2016年   1746篇
  2015年   505篇
  2014年   746篇
  2013年   2646篇
  2012年   1288篇
  2011年   2727篇
  2010年   2537篇
  2009年   2298篇
  2008年   2224篇
  2007年   2453篇
  2006年   724篇
  2005年   941篇
  2004年   934篇
  2003年   1022篇
  2002年   706篇
  2001年   592篇
  2000年   525篇
  1999年   440篇
  1998年   509篇
  1997年   437篇
  1996年   454篇
  1995年   374篇
  1994年   378篇
  1993年   363篇
  1992年   367篇
  1991年   382篇
  1990年   350篇
  1989年   259篇
  1988年   268篇
  1987年   269篇
  1986年   267篇
  1985年   363篇
  1984年   358篇
  1983年   339篇
  1982年   285篇
  1981年   288篇
  1980年   287篇
  1979年   280篇
  1978年   227篇
  1977年   187篇
  1976年   184篇
  1975年   165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 15 毫秒
31.
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   
32.
33.
34.
35.
36.
37.
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   
38.
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   
39.
Statement of Financial Accounting Standards (SFAS) No. 96, “Accounting for Income Taxes,” issued by the Financial Accounting Standards Board (FASB) in December 1987 changed accounting for income tax recognition and accrual. The original deadline for implementation of SFAS No. 96 was December 15, 1988, and earlier adoption was encouraged. This study examines empirically the stock price impact of four pertinent announcement dates regarding SFAS No. 96 for 19 banks that adopted the statement in late 1987 and early 1988. Our results suggest that these early bank adopters have different characteristics from other banks that cause them to benefit from the changes in accounting for deferred taxes and explain their voluntary adoption of the standard.  相似文献   
40.
Great variation in nursing resource use is documented within DRGs. Much of this variation may be explained by patient severity of illness. Variance in nursing resource use within DRGs can be reduced by using a severity of illness instrument to score patients.  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