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   137686篇
  免费   3747篇
  国内免费   2篇
财政金融   26066篇
工业经济   11661篇
计划管理   22000篇
经济学   29416篇
综合类   1459篇
运输经济   983篇
旅游经济   2525篇
贸易经济   23716篇
农业经济   6228篇
经济概况   17137篇
信息产业经济   7篇
邮电经济   237篇
  2021年   840篇
  2020年   1643篇
  2019年   2416篇
  2018年   2349篇
  2017年   2531篇
  2016年   2713篇
  2015年   2107篇
  2014年   3437篇
  2013年   15468篇
  2012年   4256篇
  2011年   4207篇
  2010年   3771篇
  2009年   4409篇
  2008年   3972篇
  2007年   3294篇
  2006年   3634篇
  2005年   3606篇
  2004年   3169篇
  2003年   2941篇
  2002年   2909篇
  2001年   2645篇
  2000年   2585篇
  1999年   2503篇
  1998年   2305篇
  1997年   2374篇
  1996年   2222篇
  1995年   2027篇
  1994年   2027篇
  1993年   2015篇
  1992年   2054篇
  1991年   1967篇
  1990年   1841篇
  1989年   1706篇
  1988年   1639篇
  1987年   1628篇
  1986年   1718篇
  1985年   2487篇
  1984年   2364篇
  1983年   2164篇
  1982年   2007篇
  1981年   1949篇
  1980年   1916篇
  1979年   1834篇
  1978年   1660篇
  1977年   1642篇
  1976年   1396篇
  1975年   1288篇
  1974年   1200篇
  1973年   1198篇
  1972年   907篇
排序方式: 共有10000条查询结果,搜索用时 9 毫秒
991.
The economic impact of adopting herd health programs for mastitis and reproduction by small-scale dairy producers of Central Thailand was assessed using a policy analysis matrix (PAM). Following a reduction in the incidence of bovine disease on adopter farms, an increase in private net profits is observed. More importantly the social costs of supporting dairy farmers is reduced; the PAM effective protection coefficient was reduced by 35% for mastitis program adopters and by 44% for reproductive program adopters, indicating improved social efficiency of dairy policy. Other indicators of efficiency and policy implications are discussed.  相似文献   
992.
993.
Earnings Performance and Discretionary Disclosure   总被引:12,自引:1,他引:11  
While the influence of earnings performance on disclosure is a fundamental issue in the disclosure literature, our understanding of this influence is limited. In this paper, I examine a comprehensive set of disclosures from a sample of firms experiencing an extended period of seasonally adjusted earnings increases. I study how these firms adjust disclosure in response to earnings increases, how disclosure changes as the period of strong earnings performance nears an end and how firms disclose during a subsequent period of earnings decline. I find an increase in disclosure during the period of increased earnings. This increase is pervasive across all types of disclosure and tends to be bundled with earnings announcements. The market responds positively to this disclosure. Firms continue to disclose at a high level as they approach earnings declines. However, they shift to disclosures that focus on the positive short-term results and do not discuss the impending decreases. While this behavior is systematic, the market does not appear to anticipate the subsequent earnings declines. Once the firms announce earnings declines, the magnitude of disclosure returns to the level provided prior to the increased earnings.  相似文献   
994.
Risks and Portfolio Decisions Involving Hedge Funds   总被引:6,自引:0,他引:6  
This article characterizes the systematic risk exposures ofhedge funds using buy-and-hold and option-based strategies.Our results show that a large number of equity-oriented hedgefund strategies exhibit payoffs resembling a short positionin a put option on the market index and therefore bear significantleft-tail risk, risk that is ignored by the commonly used mean-varianceframework. Using a mean-conditional value-at-risk framework,we demonstrate the extent to which the mean-variance frameworkunderestimates the tail risk. Finally, working with the systematicrisk exposures of hedge funds, we show that their recent performanceappears significantly better than their long-run performance.  相似文献   
995.
996.
997.
998.
999.
1000.
Firms in developing countries cite credit constraints as one of their primary obstacles to investment. Direct foreign investment may ease credit constraints by bringing in scarce capital. Alternatively, if foreign firms borrow heavily from domestic banks, they may crowd local firms out of domestic capital markets. Using firm data from the Ivory Coast, we test whether: (1) domestic firms are more credit constrained than foreign firms, and (2) whether borrowing by foreign firms exacerbates domestic firm credit constraints. Results provide support for both hypotheses. We also find that state-owned enterprises (SOEs) are less financially constrained than other domestic enterprises.  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