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   133144篇
  免费   3764篇
  国内免费   1篇
财政金融   25511篇
工业经济   11038篇
计划管理   21471篇
经济学   28983篇
综合类   1448篇
运输经济   948篇
旅游经济   2480篇
贸易经济   22073篇
农业经济   6075篇
经济概况   16634篇
信息产业经济   7篇
邮电经济   241篇
  2021年   826篇
  2020年   1623篇
  2019年   2367篇
  2018年   2293篇
  2017年   2479篇
  2016年   2651篇
  2015年   2077篇
  2014年   3391篇
  2013年   15224篇
  2012年   4171篇
  2011年   4080篇
  2010年   3651篇
  2009年   4281篇
  2008年   3850篇
  2007年   3180篇
  2006年   3531篇
  2005年   3529篇
  2004年   3069篇
  2003年   2852篇
  2002年   2822篇
  2001年   2630篇
  2000年   2588篇
  1999年   2450篇
  1998年   2306篇
  1997年   2268篇
  1996年   1956篇
  1995年   1970篇
  1994年   1967篇
  1993年   1947篇
  1992年   1940篇
  1991年   1854篇
  1990年   1711篇
  1989年   1573篇
  1988年   1501篇
  1987年   1515篇
  1986年   1591篇
  1985年   2354篇
  1984年   2249篇
  1983年   2040篇
  1982年   1907篇
  1981年   1895篇
  1980年   1861篇
  1979年   1764篇
  1978年   1591篇
  1977年   1582篇
  1976年   1347篇
  1975年   1238篇
  1974年   1161篇
  1973年   1148篇
  1972年   862篇
排序方式: 共有10000条查询结果,搜索用时 328 毫秒
991.
992.
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   
993.
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   
994.
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   
995.
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   
996.
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   
997.
998.
999.
1000.
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