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   135203篇
  免费   3851篇
  国内免费   1篇
财政金融   25513篇
工业经济   11537篇
计划管理   21610篇
经济学   28798篇
综合类   1441篇
运输经济   958篇
旅游经济   2486篇
贸易经济   23474篇
农业经济   6077篇
经济概况   16894篇
信息产业经济   7篇
邮电经济   260篇
  2021年   835篇
  2020年   1618篇
  2019年   2372篇
  2018年   2320篇
  2017年   2495篇
  2016年   2693篇
  2015年   2084篇
  2014年   3400篇
  2013年   15288篇
  2012年   4207篇
  2011年   4115篇
  2010年   3676篇
  2009年   4276篇
  2008年   3863篇
  2007年   3209篇
  2006年   3553篇
  2005年   3538篇
  2004年   3082篇
  2003年   2862篇
  2002年   2835篇
  2001年   2591篇
  2000年   2529篇
  1999年   2427篇
  1998年   2271篇
  1997年   2315篇
  1996年   2184篇
  1995年   1978篇
  1994年   2001篇
  1993年   1974篇
  1992年   2027篇
  1991年   1918篇
  1990年   1818篇
  1989年   1683篇
  1988年   1605篇
  1987年   1612篇
  1986年   1685篇
  1985年   2449篇
  1984年   2316篇
  1983年   2111篇
  1982年   1986篇
  1981年   1916篇
  1980年   1888篇
  1979年   1811篇
  1978年   1629篇
  1977年   1623篇
  1976年   1385篇
  1975年   1284篇
  1974年   1188篇
  1973年   1191篇
  1972年   902篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
962.
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   
963.
During the Reagan administration, the federal government mandated the use of cost–benefit analysis (CBA) for regulatory decisions involving $100 million or more. While the use of CBAs has increased, less attention has been given to CBA processes involving smaller expenditures (regulatory and nonregulatory). As the federal budget tightens in the years ahead, the need to make hard decisions about these policies, programs, and technologies will increase. This paper describes a CBA process developed for the Office of Strategic Planning of the Social Security Administration; it was designed to handle small-to-moderate expenditure decisions (or for preliminary estimates of larger undertakings). A sample CBA using this process is provided, along with a discussion of the lessons that were learned from an initial application.  相似文献   
964.
In this paper we investigate the effect of golden parachute (GP) adoptions on shareholder wealth. We control for the potential effect a GP adoption has on the probability that a firm will receive a takeover bid by investigating the wealth effects for firms that are in play when the GP is adopted. We find that announcements are wealth neutral when firms are in play and wealth increasing when firms are not in play when a GP is adopted. The results suggest that GPs have no influence on the success of a tender offer, refuting the hypotheses that they either align manager and shareholder interests or that they entrench inefficient managers. The difference in the results for in-play and not-in-play firms is consistent with the hypothesis that GPs signal an increased likelihood that a firm will receive a takeover bid.  相似文献   
965.
Reduced-form price spread models have been recently utilized by Wohlgenant and Mullen, and Thompson and Lyon to evaluate the economic factors affecting the marketing margins for agricultural products. Drawing on Gardner, Heien, Buse and Brandow, Waugh, Tomek and Robinson, and others they specify alternative retail-farm price spread models and attempt to determine which best fit the data in the context of underlying theoretical rationale. This paper continues in the spirit of Wohlgenant and Mullen, and Thompson and Lyon by evaluating alternative specifications of the retail-farm price spread for white maize in South Africa. However, several important differences do remain. Wohlgenant and Mullen analyzed the price spread for beef using annual data, while Thompson and Lyon modeled the price spread for oranges using weekly data. The time period under consideration can be expected to affect the choice of model because fixed markup rules that might be evident using a short-run period of analysis (e.g., Thompson and Lyon) become untenable over the long run with underlying supply and demand shifts. In this paper, monthly data, which may be interpreted as an intermediate-run period, are used along with dichotomous supply-demand shifters. In addition, Brorsen et. al. have shown that price uncertainty affects the price spread in the marketing channels of agricultural commodities. Thus, the analysis in this paper extends the framework of Wohlgenant and Mullen, and Thompson and Lyon to include measures of price risk. Finally, like Brorsen et. al. this study pertains to the grain market, while Wohlgenant and Mullen, and Thompson and Lyon studied the marketing margin for non-storable commodities.  相似文献   
966.
Political scrutiny and earnings management in the oil refining industry   总被引:1,自引:0,他引:1  
The fortunes of the oil refining industry have historically been tied to the political process. In periods of high gasoline prices public outcry increases pressure on the political process to increase regulation, taxation, and other costs on the industry. This study explores the relationship of gasoline prices and oil firm earning with accounting earnings management of oil firms. Findings indicate that firms make accounting changes and discretionary accruals to decrease (increase) earnings in periods when gasoline prices and oil firm earnings are rising (falling).  相似文献   
967.
968.
969.
970.
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