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   5852篇
  免费   225篇
  国内免费   138篇
财政金融   698篇
工业经济   250篇
计划管理   1139篇
经济学   1138篇
综合类   735篇
运输经济   47篇
旅游经济   84篇
贸易经济   703篇
农业经济   677篇
经济概况   744篇
  2024年   17篇
  2023年   107篇
  2022年   133篇
  2021年   200篇
  2020年   234篇
  2019年   182篇
  2018年   160篇
  2017年   207篇
  2016年   169篇
  2015年   202篇
  2014年   370篇
  2013年   410篇
  2012年   511篇
  2011年   579篇
  2010年   387篇
  2009年   370篇
  2008年   463篇
  2007年   412篇
  2006年   333篇
  2005年   238篇
  2004年   138篇
  2003年   105篇
  2002年   63篇
  2001年   60篇
  2000年   45篇
  1999年   29篇
  1998年   22篇
  1997年   15篇
  1996年   18篇
  1995年   5篇
  1994年   7篇
  1993年   3篇
  1992年   3篇
  1991年   2篇
  1986年   1篇
  1985年   3篇
  1984年   5篇
  1983年   3篇
  1982年   4篇
排序方式: 共有6215条查询结果,搜索用时 15 毫秒
1.
ABSTRACT

The paper presents a new combined annual cost of living and consumer price index for Norway covering 1492–2018, indicating that Norwegian price history has to be revised. The new historical price index is constructed on a significantly richer data material, which also makes it cover a longer period of price history than the existing one. This is made possible by the compilation of quantitative data from numerous sources, mostly originating from the eighteenth, nineteenth and early twentieth centuries, with grain prices stretching back to 1492. The new combined cost of living and consumer price index is constructed by a Laspeyres approach with shifting baskets for commodities and expenditure groups.

The index makes it possible to follow annual inflation and deflation in Norway for a period of 526 years. When comparing to existing indices, the new series reveals that revisions are needed in Norwegian price history. These make the historical price development more in line with those of the neighbouring countries and more in line with the pattern of wholesale prices.  相似文献   
2.
3.
This study investigates whether major USDA reports still provide important news to changing crop markets. The news component of each report, or market “surprise,” is measured as a difference between the USDA estimate and its private expectation in corn, soybeans, and wheat markets. Changes in the relevance of USDA information are assessed by examining changes in the magnitude of market surprises and shifts in the futures price reaction to these surprises, which isolates the impact of each report. The stable size of market surprises over time suggests that competition from alternative data sources has not reduced the news component of USDA crop reports. Increasing price reaction to most reports, including those facing competition from alternative information sources, suggests that value of public information may be enhanced in uncertain markets affected by structural changes.  相似文献   
4.
ABSTRACT

This article identifies the breakdowns in the covariance of three benchmark crude oil futures markets (WTI, Brent and Dubai) and investigates the changes of market connectedness across the breakdown periods. As the crude oil futures are traded in different regions, this article eliminates the non-synchronous trading data by employing the Vector Moving Average structure and the Bayesian data augmentation approach, which keeps the integrity of original data without changing its properties. The results show that there are significant breaks in the covariance structure of crude oil futures markets. The breakdown periods are consistent with the periods when the market volatilities are at high level and the returns are volatile. The changes of market connectedness are independent of the covariance states, which supports the globalization hypothesis for the crude oil market. The results also suggest that there is more information flow out of the WTI than to the WTI during the sample period, particularly during the breakdown periods in 2008–2009.  相似文献   
5.
Using an extended LHARG model proposed by Majewski et al. (2015, J Econ, 187, 521–531), we derive the closed-form pricing formulas for both the Chicago Board Options Exchange VIX term structure and VIX futures with different maturities. Our empirical results suggest that the quarterly and yearly components of lagged realized volatility should be added into the model to capture the long-term volatility dynamics. By using the realized volatility based on high-frequency data, the proposed model provides superior pricing performance compared with the classic Heston–Nandi GARCH model under a variance-dependent pricing kernel, both in-sample and out-of-sample. The improvement is more pronounced during high volatility periods.  相似文献   
6.
Despite the increasing academic interest in the sensory dimension of the tourist experience, the quantitative empirical research in the field is limited by a lack of measurement instruments for evaluating the sensory stimuli perceived by tourists during a destination visit. The study addresses this gap by developing a composite index to assess the sensory destination panorama, termed as “destination sensescape”. The construct is conceptualised as a formative multidimensional variable with 5 dimensions (visualscape, smellscape, tastescape, soundscape, and hapticscape). The psychometric validity and reliability of the 17 items integrating the formative index were established by a rigorous multi-step procedure based on three empirical studies. The instrument was tested with data collected from visitors of a Mediterranean urban destination. The operationalisation of the destination sensescape construct not only paves the way for future quantitative sensory studies, but also yields a useful tool for Destination Marketing Organisations (DMOs).  相似文献   
7.
尚梅 《基建优化》2003,24(6):7-8,11
建筑工程资格预审无论对业主还是对承包商都至关重要,根据建筑工程的特点,在目前普遍采用的资格预审评价方法的基础之上,总结了进行资格预审的评价指标体系,并提出了基于模糊数学意见集中排序法的建筑工程资格预审方法。  相似文献   
8.
该文主要介绍了期货投资分析实验教材编写的意义、框架和思路,以及该实验教材在编就后所体现出的特点,和我们在编写过程中的一些思考。  相似文献   
9.
论法律不完备性与政府介入期货市场   总被引:3,自引:0,他引:3  
在期货市场上,法律不完备性问题表现得较为突出,法律对于侵害行为的阻吓作用非常有限、期货市场法律的不完备性,主要取决于期货市场的特点和性质。政府采取相关的监管方式管理期货市场非常必要,监管的介入需要满足标准化和损害(外部性)足够高的条件。政府管理期货市场立法和法院执法的作用不可或缺,但更主要的是采用监管的方式。  相似文献   
10.
牛树海 《乡镇经济》2008,24(2):49-51
文章通过泰尔指数发现从1990年到2005年,河南省区域经济的差距处于一个快速扩大的阶段。通过定量分析发现,河南省区域经济发展水平和发展速度与农业生产具有一定的负相关性,通过定性和定量分析发现,农业产业化对区域差距缩小具有一定的作用,但不起主要作用,一是由于目前河南省农业产业化水平相对还是比较低,农业收入还仅仅停留于农产品的买卖价格,工资性收入所占比重过低,二是农业产业化龙头企业带动能力还是比较弱,带动面小,限制了农区经济的发展水平和速度,最后提出了几点建议。  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