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   35269篇
  免费   466篇
财政金融   6437篇
工业经济   2250篇
计划管理   5595篇
经济学   7847篇
综合类   649篇
运输经济   132篇
旅游经济   287篇
贸易经济   7604篇
农业经济   832篇
经济概况   3438篇
信息产业经济   46篇
邮电经济   618篇
  2023年   106篇
  2021年   141篇
  2020年   275篇
  2019年   362篇
  2018年   2660篇
  2017年   2440篇
  2016年   1642篇
  2015年   413篇
  2014年   559篇
  2013年   2199篇
  2012年   1013篇
  2011年   2517篇
  2010年   2341篇
  2009年   2111篇
  2008年   2027篇
  2007年   2319篇
  2006年   551篇
  2005年   767篇
  2004年   850篇
  2003年   939篇
  2002年   631篇
  2001年   451篇
  2000年   436篇
  1999年   385篇
  1998年   411篇
  1997年   349篇
  1996年   319篇
  1995年   298篇
  1994年   308篇
  1993年   305篇
  1992年   336篇
  1991年   309篇
  1990年   259篇
  1989年   241篇
  1988年   216篇
  1987年   205篇
  1986年   237篇
  1985年   307篇
  1984年   320篇
  1983年   297篇
  1982年   280篇
  1981年   241篇
  1980年   215篇
  1979年   202篇
  1978年   191篇
  1977年   167篇
  1976年   154篇
  1975年   165篇
  1974年   114篇
  1973年   116篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
33.
34.
The notion that prices impound a wide array of information, including market expectations, has led to earnings forecast models conditioned on prices. Yet, presumably, analysts' forecasts capture both public information and certain private information not previously impounded in prices. Accordingly, price-based models are seemingly an inefficient, and less effective, source of expecta-tions. This article investigates this hypothesis using financial analysts', price-based, and naive forecasts. Results indicate that analysts' forecasts (1) are at least as accurate as price-based and naive models, and (2) yield better expectations for market tests relating returns and earnings. These inferences are robust across different information environments. The evidence suggests that analysts either possess private information or are more effective information processors, or both.  相似文献   
35.
This paper examines the correlation between the excess stock market returns and the adoption of an environmental protocol by companies. The underlying hypothesis that I test is whether evidence of the adoption of environmental policy, prosecution by an environmental agency or the routinized training of staff in environmental protocols, which proxies for the willingness of managers to invest for the long term, is associated with superior economic returns to shareholders. I find that both the adoption of an environmental policy and prosecution for breach of environment standards have significant explanatory power in an analysis of excess returns. Copyright © 2001 John Wiley & Sons, Ltd. and ERP Environment  相似文献   
36.
Cost of equity estimates are compared for three pricing models: the traditional local CAPM, the single (market) factor global CAPM, and the two‐factor global CAPM, with both market and currency index factors. For 2989 US stocks, the average difference in the cost of equity estimates is about 48 basis points between the local CAPM and the single‐factor global CAPM, and is about 61 basis points between the two global models. For 70 developed‐market ADRs, the corresponding average differences are 76 and 47 basis points, respectively. For 48 emerging‐market ADRs, the corresponding average differences are 57 and 70 basis points.  相似文献   
37.
Popular monthly coincident indices of business cycles, e.g. the composite index and the Stock–Watson coincident index, have two shortcomings. First, they ignore information contained in quarterly indicators such as real GDP. Second, they lack economic interpretation; hence the heights of peaks and the depths of troughs depend on the choice of an index. This paper extends the Stock–Watson coincident index by applying maximum likelihood factor analysis to a mixed‐frequency series of quarterly real GDP and monthly coincident business cycle indicators. The resulting index is related to latent monthly real GDP. Copyright © 2002 John Wiley & Sons, Ltd.  相似文献   
38.
A negative relationship between corporate leverage and tax shields has been predicted because a large nondebt tax shield reduces the expected value of interest tax savings and lessens the advantage of debt financing. Previous studies, however, have provided inconclusive and contradictory evidence on whether nondebt tax shields crowd-out debt financing. The analysis herein relies on unique constructs of discounted depreciation tax shields and presents evidence that crowding-out does not occur. Furthermore, it is shown that contradictory inferences may result from analysis of annual tax depreciation deductions instead of discounted tax shields. The findings suggest that firms with substantial cash flow from depreciation exploit their higher debt capacity by maintaining a capital structure with significantly more debt than otherwise.  相似文献   
39.
Previous empirical research indicates that corporate insiders tend to increase (decrease) their shareholdings before events that increase (decrease) firm value. More recent evidence suggests, however, that passage of the Insider Trading Sanctions Act of 1984 (ITSA) may have deterred this behavior. Our results indicate that before passage of the ITSA, insiders exploited their access to nonpublic information by selling shares before the announcement of equity issues. However, after passage of the ITSA insiders no longer displayed this behavior. We conclude the ITSA has a deterrent effect, which is more heavily concentrated on insiders at the highest level of the firm who are most visible to regulators and other market participants.  相似文献   
40.
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   
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