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   47919篇
  免费   821篇
  国内免费   8篇
财政金融   7864篇
工业经济   2901篇
计划管理   8114篇
经济学   10957篇
综合类   1460篇
运输经济   269篇
旅游经济   409篇
贸易经济   8872篇
农业经济   1694篇
经济概况   5490篇
信息产业经济   52篇
邮电经济   666篇
  2023年   172篇
  2022年   194篇
  2021年   367篇
  2020年   536篇
  2019年   608篇
  2018年   2878篇
  2017年   2783篇
  2016年   1942篇
  2015年   639篇
  2014年   989篇
  2013年   2975篇
  2012年   1903篇
  2011年   3700篇
  2010年   3323篇
  2009年   2793篇
  2008年   2834篇
  2007年   3034篇
  2006年   1316篇
  2005年   1506篇
  2004年   1099篇
  2003年   1244篇
  2002年   863篇
  2001年   723篇
  2000年   584篇
  1999年   465篇
  1998年   521篇
  1997年   466篇
  1996年   472篇
  1995年   378篇
  1994年   384篇
  1993年   363篇
  1992年   372篇
  1991年   376篇
  1990年   340篇
  1989年   251篇
  1988年   257篇
  1987年   270篇
  1986年   258篇
  1985年   359篇
  1984年   357篇
  1983年   330篇
  1982年   283篇
  1981年   289篇
  1980年   278篇
  1979年   276篇
  1978年   223篇
  1977年   182篇
  1976年   187篇
  1975年   162篇
  1973年   147篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
In rational, efficiently functioning and complete markets, returns on derivative and underlying securities should be perfectly contemporaneously correlated. Due to market imperfections, one of these markets may reflect information faster. The use of high-frequency data and the choice for a small unit time interval to measure these lead-lag relations comes at the cost of some or many missing observations, causing traditional estimators to either under- or overestimate covariances and correlations. We use a new estimator to estimate lead-lag relationships between the cash AEX index, options and futures. We find that futures returns lead both options and cash index returns by approximately 10 minutes. The relationship between options and the cash market is not completely unidirectional.  相似文献   
102.
103.
Despite the prevalence of elective business ethics courses, little research has sought to explain and predict why some students enroll in these courses and while others do not. Using the theory of planned behavior (Ajzen and Madden, 1986) as a theoretical foundation, 178 graduate students in Ireland were surveyed about their intention to sign up for an elective ethics class. Their behavior was measured two months later. The results reveal the power of the theory of planned behavior to explain and predict who takes elective ethics classes.Donna M. Randall is an associate professor and chair in the Department of Management and Systems at Washington State University. Her research interests include business ethics, organizational commitment, and reproductive risk in the work place. Her work has appeared inJournal of Business Ethics, Decision Sciences, Academy of Management Review, Journal of Vocational Behavior, Journal of Business Research, and others.  相似文献   
104.
Objections to the teaching of business ethics   总被引:1,自引:0,他引:1  
  相似文献   
105.
Asset market hangovers and economic growth: the OECD during 1984-93   总被引:1,自引:0,他引:1  
Asses prices and investment were unusually weak throughout theindustrial world during the early 1990s. This paper highlightsthis stylized fact, and connects it with another: in most ofthe industrial world, asset markets boomed for several yearsbefore collapsing around 1989. The paper suggests that assetmarket bubbles during the late 1980s may have left the industrialworld with an 'asset market hangover' in the early 1990s, inthe form of sluggish asset markets and investment. Empiricalsupport for this hypothesis is provided based on cross-countrydata for equity and real estate markets in most industrial countries.We suggest that financial market developments not justifiedby fundamentals can substantially affect real activity.  相似文献   
106.
107.
深圳市线路板蚀刻废液中铜、砷、铅、汞、镉含量调查   总被引:2,自引:0,他引:2  
对深圳市60家线路板企业含铜蚀刻废液中铜、砷、铅、汞、镉含量的检测结果显示:酸、碱性蚀刻废液铜含量范围分别为38.6~167.9g/L、53.7~171.8g/L,,通过测量比重推算铜含量适用于碱性废液但不适合酸性废液.56个样品可检出砷(大于3mg/L).56个样品未检出铅(小于5mg/L),其余4个铅含量偏高.所有样品汞、镉均未检出,含量分别小于4mg/L、0.3 mg/L.将各样品砷、铅、汞、镉含量实测值换算为铜含量100ga.时的相对值后发现,上述四元素在蚀刻废液中的正常值分别为<12mgAs/L、<5 mg Pb/L、<4 mg Hg/L、<0.3 mg Cd/L.  相似文献   
108.
109.
This article surveys recent research of the Spanish colonial era in the Philippines since the late eighteenth century. While highlighting imperfections in our understanding, the article establishes the parameters with which the Philippine economy entered the twentieth century. It outlines the intensification of Spanish colonial rule through changes in the taxation system, particularly the expansion of forced tobacco cultivation until its abolition in 1882. Since then, the Spanish set out to further change and intensify colonial rule but contradictions in the system of colonial rule caused the effort to come to an abrupt end in 1898.  相似文献   
110.
5月下甸,又是一个烈日炎炎的夏日,杰克·史密斯先生按照惯例早早就起了床。但与平日不同的是,作为公司行政总监的他并没有直接去自己的办公室开始一天的工作,而是手拿一份查体表来到了济南市中医院,成为济南市第二届外商服务月活动中的首项内容“为济南市外企员工查体活动”的第一批受益者。在经过非常细致的心、脑、血液等项目的  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