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   54940篇
  免费   1140篇
  国内免费   1篇
财政金融   10438篇
工业经济   4005篇
计划管理   8758篇
经济学   12485篇
综合类   661篇
运输经济   407篇
旅游经济   902篇
贸易经济   8817篇
农业经济   2620篇
经济概况   6886篇
信息产业经济   4篇
邮电经济   98篇
  2021年   331篇
  2020年   653篇
  2019年   999篇
  2018年   1156篇
  2017年   1198篇
  2016年   1187篇
  2015年   765篇
  2014年   1283篇
  2013年   5654篇
  2012年   1708篇
  2011年   1860篇
  2010年   1634篇
  2009年   1778篇
  2008年   1689篇
  2007年   1463篇
  2006年   1377篇
  2005年   1171篇
  2004年   1138篇
  2003年   1094篇
  2002年   1102篇
  2001年   1113篇
  2000年   1110篇
  1999年   1048篇
  1998年   1068篇
  1997年   998篇
  1996年   956篇
  1995年   872篇
  1994年   875篇
  1993年   881篇
  1992年   918篇
  1991年   918篇
  1990年   781篇
  1989年   661篇
  1988年   631篇
  1987年   656篇
  1986年   647篇
  1985年   963篇
  1984年   941篇
  1983年   887篇
  1982年   798篇
  1981年   744篇
  1980年   752篇
  1979年   707篇
  1978年   588篇
  1977年   516篇
  1976年   458篇
  1975年   481篇
  1974年   402篇
  1973年   385篇
  1972年   275篇
排序方式: 共有10000条查询结果,搜索用时 10 毫秒
1.
2.
In this paper we will analyze the relationship between the value and duration moments of a cash flow and movements in the yield curve. We will show that for changes in the yield curve which can be related to tn , the 1st order changes in the net present value of a cash flow are linearly dependent on the n + lth duration moments, and that the 2nd order changes are dependent on the sum of duration moments of order 2 n + 1 and 2 n + 2. We will use this relationship to tilt tracking portfolios so as to protect them against specific changes in the yield curve.  相似文献   
3.
4.
The 1992–93 recession in the western states of Germany has been attributed, in substantial measure, to the macroeconomic consequences of policies to finance unification. Studies of the costs of unification have not attempted to measure the burden of the recession. We estimate a dynamic, panel model of household incomes using data from the German Socio-Economic Panel (GSOEP) and use it to forecast what these incomes would have been in 1992–94 without a recession. Using a ratio of actual to forecast incomes, we compare the relative burden of the recession across households. Our findings suggest that western households below the median income bore the brunt of the combined impact of unification and the recession of 1992–93.
JEL classification: P3, D3, E3.  相似文献   
5.
The number of firms using alliances as part of their corporate venturing or market entry strategies has surged over the past decade. Three common reasons cited for pursuing alliances are technology convergence, market access and alliance partners' complementary resources. This paper contrasts the alliance strategies of HP and IBM, two major competitors in electronic services (i.e. Internet-based 'e- service') businesses, using the Familiarity Matrix as a display tool to portray the strategies. Whereas the HP strategy is to attempt to establish its technology infrastructure as the standard e-services infrastructure on the Internet, IBM aims to position its IBM Global Services, rather than its technology, at the center of this ecosystem.  相似文献   
6.
This paper examines monthly wage data collected by the Agro Economic Survey from seven villages in the Cimanuk River Basin of West Java, where data on agricultural and non-agricultural wages and prices of nine essential commodities were collected twice monthly between 1977 and 1983. Movements in money wages deflated by both the rice price and a weighted index of basic commodities are analysed in detail and differences between lowland and upland villages are discussed.  相似文献   
7.
8.
We propose a new model to estimate the term structure of interest rates using observed on‐the‐run Treasury yields. The new model is an improvement over models that require a priori knowledge of the shape of the yield curve to estimate the term structure. The general form of the model is an exponential function that depends on the estimation of four parameters fit by nonlinear least squares and has straightforward interpretations. In comparing the proposed model with current yield‐curve‐smoothing models, we find that, for the data used, the proposed model does best overall in terms of pricing accuracy both in sample and out of sample. JEL classification: E43, G12  相似文献   
9.
The relaxation of security laws and regulations in emerging markets in the Middle East and North Africa (MENA) provides abundant opportunities for foreign investors. These markets exhibit high-expected returns and substantial volatility. In this paper, we investigate the lead/lag relationship between the MENA countries and regions. We find no market causality or spillover from one country to another in the North Africa region. Our results for the Levant region reveal that there are linkages between stock markets in this region. The results for the Gulf Cooperation Council (GCC) region show that there is more interaction and linkage in the GCC region than in the North Africa and Levant regions. An unexpected result is that UAE's stock market leads all the markets in this region. Finally, we investigate linkages among the three regions. We find that GCC influences the other two regions.  相似文献   
10.
Using a sample of Australian Multi-sector trusts we examine selectivity and market timing performance and extend the analysis to include the relatively new measure of volatility timing. This is of particular relevance to our data set, as high levels of volatility persistence are prevalent in Australia. In addition we consider the stability, asymmetry and seasonality of the various performance and risk measures. A survivorship adjustment procedure is also employed in order to assess the impact of survivorship on selectivity, market timing and volatility timing performance.  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