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   8210篇
  免费   301篇
财政金融   1733篇
工业经济   696篇
计划管理   1335篇
经济学   1758篇
综合类   110篇
运输经济   94篇
旅游经济   163篇
贸易经济   1722篇
农业经济   244篇
经济概况   584篇
信息产业经济   4篇
邮电经济   68篇
  2023年   57篇
  2022年   47篇
  2021年   79篇
  2020年   120篇
  2019年   196篇
  2018年   219篇
  2017年   248篇
  2016年   214篇
  2015年   174篇
  2014年   275篇
  2013年   956篇
  2012年   313篇
  2011年   355篇
  2010年   324篇
  2009年   365篇
  2008年   324篇
  2007年   277篇
  2006年   254篇
  2005年   285篇
  2004年   236篇
  2003年   243篇
  2002年   234篇
  2001年   194篇
  2000年   173篇
  1999年   176篇
  1998年   144篇
  1997年   152篇
  1996年   126篇
  1995年   118篇
  1994年   123篇
  1993年   110篇
  1992年   100篇
  1991年   88篇
  1990年   63篇
  1989年   69篇
  1988年   66篇
  1987年   64篇
  1986年   65篇
  1985年   110篇
  1984年   90篇
  1983年   79篇
  1982年   85篇
  1981年   67篇
  1980年   74篇
  1979年   66篇
  1978年   57篇
  1977年   61篇
  1976年   56篇
  1974年   31篇
  1972年   21篇
排序方式: 共有8511条查询结果,搜索用时 312 毫秒
71.
The Economic Forces Driving Food Safety Quality in Meat and Poultry   总被引:1,自引:0,他引:1  
This article examines the impact of regulation and market-driven private actions on food safety performance in the meat and poultry industries. We find that private actions account for about 80% and regulation about 20% of the overall reduction in the share of samples of cattle and hog carcasses, ground beef, and broilers testing positive for Salmonella if all regulation and private actions were increased by identical amounts.  相似文献   
72.
This paper provides a new framework for evaluating the welfare effects of commodity tax reforms. It is shown that tax reforms are welfare improving if and only if they satisfy the following intuitive property: on average, consumer prices fall for commodities with high marginal excess burdens. The rule is then applied to analyze a shift from differentiated commodity taxation to direct flat-rate taxation of labour income. The welfare impact of such reforms can be decomposed into two effects: (i) the increase in welfare associated with substitution among taxed commodities, and (ii) the loss in welfare associated with substitution between commodities and leisure. On balance, a shift towards direct taxation is desirable when inter-commodity substitution effects are large relative to commodity–leisure substitution effects. The analysis allows us to reconcile the apparently conflicting results of the tax reform and optimal taxation literatures.  相似文献   
73.
74.
75.
76.
77.
78.
Dynamic futures‐hedging ratios are estimated across seven markets using generalized models of the variance/covariance structure. The hedging performances of the resultant dynamic strategies are then compared with static and naïve strategies, both in‐ and out‐of‐sample. Bayesian‐adjusted hedge ratios also are employed as error purgers. The empirical results indicate that the generalized dynamic models are well specified and that their use in determining optimal hedge ratios can lead to improvements in hedging performance as measured by the volatilities of the returns on the optimally hedged position. © 2003 Wiley Periodicals, Inc. Jrl Fut Mark 23:241–260, 2003  相似文献   
79.
The Chicago Board Options Exchange concurrently listed European‐style and American‐style options on the Standard and Poor's 500 Index from April 2, 1986 through June 20, 1986. This unique time period allows for a direct measurement of the early exercise premium in American‐style index options. In this study, using ask quotes, we find average early exercise premiums ranging from 5.04 to 5.90% for calls, and from 7.97 to 10.86% for puts. Additionally, we are able to depict a potentially useful functional form of the early exercise premium. As in previous studies, we find some instances of negative early exercise premiums. However, a trading simulation shows that traders must be able to trade within the bid–ask spread to profit from these apparent arbitrage opportunities. © 2003 Wiley Periodicals, Inc. Jrl Fut Mark 23:287–313, 2003  相似文献   
80.
This study attempts to infuse relationship marketing theory into the study of logistics outsourcing relationships. In particular, the study demonstrates that not all of the partnerships between customers and providers of third‐party logistics services are the same in terms of their level of development. The existence of distinct levels of partnership established previously in the logistics literature is partially supported and a relationship between level of partnership development and the customer perceptions of key relationship marketing elements and outcomes is established. While exploratory in nature, these findings suggest there are benefits for the increased costs of developing closer partnerships.  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