全文获取类型
收费全文 | 137372篇 |
免费 | 3245篇 |
国内免费 | 2篇 |
专业分类
财政金融 | 25950篇 |
工业经济 | 11574篇 |
计划管理 | 21888篇 |
经济学 | 29334篇 |
综合类 | 1459篇 |
运输经济 | 967篇 |
旅游经济 | 2494篇 |
贸易经济 | 23615篇 |
农业经济 | 6121篇 |
经济概况 | 16934篇 |
信息产业经济 | 7篇 |
邮电经济 | 276篇 |
出版年
2021年 | 844篇 |
2020年 | 1633篇 |
2019年 | 2393篇 |
2018年 | 2319篇 |
2017年 | 2504篇 |
2016年 | 2685篇 |
2015年 | 2106篇 |
2014年 | 3410篇 |
2013年 | 15319篇 |
2012年 | 4211篇 |
2011年 | 4158篇 |
2010年 | 3721篇 |
2009年 | 4328篇 |
2008年 | 3880篇 |
2007年 | 3255篇 |
2006年 | 3594篇 |
2005年 | 3566篇 |
2004年 | 3128篇 |
2003年 | 2903篇 |
2002年 | 2862篇 |
2001年 | 2664篇 |
2000年 | 2598篇 |
1999年 | 2476篇 |
1998年 | 2334篇 |
1997年 | 2384篇 |
1996年 | 2226篇 |
1995年 | 2023篇 |
1994年 | 2049篇 |
1993年 | 1999篇 |
1992年 | 2071篇 |
1991年 | 1985篇 |
1990年 | 1836篇 |
1989年 | 1683篇 |
1988年 | 1617篇 |
1987年 | 1631篇 |
1986年 | 1720篇 |
1985年 | 2476篇 |
1984年 | 2361篇 |
1983年 | 2158篇 |
1982年 | 2029篇 |
1981年 | 1964篇 |
1980年 | 1915篇 |
1979年 | 1871篇 |
1978年 | 1665篇 |
1977年 | 1638篇 |
1976年 | 1394篇 |
1975年 | 1299篇 |
1974年 | 1194篇 |
1973年 | 1188篇 |
1972年 | 900篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
191.
192.
193.
194.
Christopher M. Dent 《Intereconomics》1997,32(1):7-13
Present economic linkages between the European Union and East Asia are relatively underdeveloped despite the fact that a number of EU member states have deep historical associations within the region. It is imperative that EU business engages itself more intensively in East Asia if Europe is not to become marginalised in an emergent “Pacific century”. *** DIRECT SUPPORT *** A02GP109 00002 相似文献
195.
Current Issues in the Analysis of Commercial Real Estate 总被引:1,自引:0,他引:1
This paper identifies and discusses a number of current issues regarding our understanding of commercial real estate markets. These issues include: 1) accurate estimation of the quantity and location of our nation's commercial space; 2) an understanding of the linkage between the space and capital markets for commercial real estate; 3) identification of the macroeconomic factors that affect the rate of return on commercial property and whether local market factors also affect the rate of return; 4) problems associated with measuring the return characteristics of equity investments in commercial property (including measures of the diversification benefits and inflation-hedging abilities of this asset class); 5) a better understanding of rental markets, including good measures of changes in effective rents over time; and 6) examination of the rationale for ownership of commercial space by corporate users. This paper reviews recent research related to these questions and suggests future research that should prove to be fruitful. 相似文献
196.
Summary A sequential testing procedure called 2-SPRT for the meanμ of the negative binomial distribution with known exponentk is presented. For any fixedμ
0(μ
1<μ
0<μ
2), the 2-SPRT provides an asymptotic solution to the modified Kiefer-Weiss problem. Determination ofμ
0 such that the test provides an approximate solution to the Kiefer-Weiss problem is described. The behavior of the 2-SPRT
and the Sequential Probability Ratio Test is investigated using Monte Carlo methods. The error probabilities and the average
sample numbers are compared.
All the computations were carried out on the Alabama Supercomputer. 相似文献
197.
James H. Stock 《Oxford bulletin of economics and statistics》1996,58(4):685-701
This paper focuses on the construction of forecasts over long horizons where a typical long-horizon forecast might span four years using 20 to 40 years’ data. It is argued that the presence of persistence in the form of unit or near-unit autoregressive roots poses substantial difficulties for long-horizon interval and point forecasting. These difficulties may not be overcome even by efficient pre-testing or model-selection procedures and might, in general, lead to point forecasts with large asymptotic root mean squared errors and undesirably wide prediction intervals. 相似文献
198.
199.
200.
Dr. M. Riedel 《Metrika》1992,39(1):209-217
Summary In this note we characterize all linear transformations of random vectors which are invariant for a given parametric covariance
family. Two one-dimensional covariance families are discussed in detail. 相似文献