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   44122篇
  免费   1066篇
财政金融   8301篇
工业经济   3192篇
计划管理   7421篇
经济学   9977篇
综合类   728篇
运输经济   294篇
旅游经济   701篇
贸易经济   6758篇
农业经济   2131篇
经济概况   5569篇
信息产业经济   3篇
邮电经济   113篇
  2021年   278篇
  2020年   505篇
  2019年   765篇
  2018年   843篇
  2017年   918篇
  2016年   875篇
  2015年   644篇
  2014年   991篇
  2013年   4513篇
  2012年   1348篇
  2011年   1441篇
  2010年   1268篇
  2009年   1353篇
  2008年   1339篇
  2007年   1151篇
  2006年   1035篇
  2005年   950篇
  2004年   839篇
  2003年   907篇
  2002年   841篇
  2001年   928篇
  2000年   925篇
  1999年   831篇
  1998年   881篇
  1997年   817篇
  1996年   777篇
  1995年   724篇
  1994年   715篇
  1993年   729篇
  1992年   721篇
  1991年   727篇
  1990年   637篇
  1989年   515篇
  1988年   511篇
  1987年   502篇
  1986年   496篇
  1985年   763篇
  1984年   788篇
  1983年   712篇
  1982年   654篇
  1981年   678篇
  1980年   657篇
  1979年   651篇
  1978年   515篇
  1977年   482篇
  1976年   449篇
  1975年   383篇
  1974年   376篇
  1973年   363篇
  1972年   243篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
We empirically investigate the interactions among hedging, financing, and investment decisions. We argue that the way in which hedging affects a firm's financing and investing decisions differs for firms with different growth opportunities. We find that high growth firms increase their investment, but not leverage, by hedging. However, we also find that firms with few investment opportunities use derivatives to increase their leverage.  相似文献   
92.
93.
94.
95.
If actively managed mutual funds suffer from diminishing returns to scale, funds should alter investment behavior as assets under management increase. Although asset growth has little effect on the behavior of the typical fund, we find that large funds and small‐cap funds diversify their portfolios in response to growth. Greater diversification, especially for small‐cap funds, is associated with better performance. Fund family growth is related to the introduction of new funds that hold different stocks from their existing siblings. Funds with many siblings diversify less rapidly as they grow, suggesting that the fund family may influence a fund's portfolio strategy.  相似文献   
96.
This article investigates the determinants of real estate investment trusts (REIT) portfolio investment and institutional REIT ownership using multivariate Tobit regressions. We contend that many institutional investors take larger positions in more liquid assets like REIT stocks, as compared with private real estate equities, because of liquidity considerations. Consistent with this contention, we find that liquidity constraints are significantly related to REIT portfolio investment by institutional investors. We also find that institutional investors have different preferences for REIT stocks than do other investors; they generally prefer larger, more liquid REIT stocks.  相似文献   
97.
A survey conducted in Mississippi, Texas, Indiana, and Nebraska elicited producers' preferences for various farm policy changes. This permitted examination of the diversity of preferences that single-state studies have not allowed. Five policy choices, including deficiency payments, loan programs, crop insurance, export programs, and disaster payments were examined. Logit model results predicting producer preferences for each of the five dichotomous policy choices are reported. Explanatory variables based on expected utility theory such as risk aversion, price and yield variability, and price–yield correlation are significant in various models.  相似文献   
98.
M. P.  A. M.  M. P.   《Technovation》2002,22(12)
Telework as an integration of Information and Telecommunication Technologies with Human Resources management, means a new job organisation paradigm for companies working in the New Economy. However there are very few empirical studies that have analysed the perception differences of telework benefits and barriers in industrial and service companies. This paper contributes with empirical data to the relationship between the use of telework techniques and the implementation of this new work organisation with the company's operations strategy. The paper uses data from Spanish companies to test the relationship between innovation, employee training, and other production strategy performance parameters with the feasibility of telework adoption.  相似文献   
99.
There are two variance components embedded in the returns constructed using high frequency asset prices: the time-varying variance of the unobservable efficient returns that would prevail in a frictionless economy and the variance of the equally unobservable microstructure noise. Using sample moments of high frequency return data recorded at different frequencies, we provide a simple and robust technique to identify both variance components.  相似文献   
100.
Models that assume only consumer tastes determine the characteristics of supply are restrictive; producers can gain utility from aspects of production and pay for deviating from demand by accepting lower financial returns. We model and measure motivations of California winery owners, and analyze their effects on quality and price. We find utility–maximizers are more likely to produce high quality and set higher quality–adjusted prices. Profit–oriented owners are less likely to produce high quality wines. These results suggest that the presence of hobbyists who enjoy producing high quality may lower financial returns in the segment and discourage profit–maximizers from locating there.  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