全文获取类型
收费全文 | 47958篇 |
免费 | 1491篇 |
国内免费 | 528篇 |
专业分类
财政金融 | 4130篇 |
工业经济 | 2328篇 |
计划管理 | 11437篇 |
经济学 | 8483篇 |
综合类 | 7043篇 |
运输经济 | 415篇 |
旅游经济 | 906篇 |
贸易经济 | 5661篇 |
农业经济 | 3557篇 |
经济概况 | 6012篇 |
信息产业经济 | 5篇 |
出版年
2024年 | 124篇 |
2023年 | 556篇 |
2022年 | 812篇 |
2021年 | 1315篇 |
2020年 | 1539篇 |
2019年 | 943篇 |
2018年 | 786篇 |
2017年 | 897篇 |
2016年 | 1076篇 |
2015年 | 1282篇 |
2014年 | 3372篇 |
2013年 | 3777篇 |
2012年 | 4025篇 |
2011年 | 5536篇 |
2010年 | 3609篇 |
2009年 | 3027篇 |
2008年 | 3037篇 |
2007年 | 2523篇 |
2006年 | 2384篇 |
2005年 | 1803篇 |
2004年 | 1302篇 |
2003年 | 1260篇 |
2002年 | 1044篇 |
2001年 | 937篇 |
2000年 | 694篇 |
1999年 | 498篇 |
1998年 | 321篇 |
1997年 | 263篇 |
1996年 | 199篇 |
1995年 | 105篇 |
1994年 | 82篇 |
1993年 | 72篇 |
1992年 | 58篇 |
1991年 | 49篇 |
1990年 | 32篇 |
1989年 | 20篇 |
1988年 | 28篇 |
1987年 | 13篇 |
1986年 | 8篇 |
1985年 | 97篇 |
1984年 | 102篇 |
1983年 | 75篇 |
1982年 | 63篇 |
1981年 | 32篇 |
1980年 | 82篇 |
1979年 | 56篇 |
1978年 | 37篇 |
1977年 | 23篇 |
1975年 | 1篇 |
1973年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
931.
聚乙烯醇产品的市场研究 总被引:7,自引:0,他引:7
马磊 《石油化工技术经济》2003,19(4):42-49
对聚乙烯醇树脂产品进行了产业背景、供求态势、市场细分与评估以及竞争力分析等全面研究,为聚乙烯醇项目建设、产品方案规划与市场营销提供决策参考。 相似文献
932.
933.
934.
We investigate the determinants of direct office real estate returns by analyzing rents, capital appraisals, and total returns. A recently compiled global database of major cities in Asia, Europe, and the United States provides a unique opportunity to give a macro-view on the effects of economic growth and supply and demand factors on nominal real estate returns. The global database provides quarterly observations from 1986 to 1999. To address the smoothness problem of appraisal-based price data and regulated rents, we employ the Generalized Method of Moments to estimate a dynamic panel-data model. The model allows us to combine the cross-sectional and time-series dimension in our quarterly data. We find that gross domestic product, inflation, unemployment, vacancy rate, and the available stock all have an effect on real estate returns. 相似文献
935.
936.
Sven Rady 《Finance and Stochastics》1997,1(4):331-344
This paper uses a probabilistic change-of-numeraire technique to compute closed-form prices of European options to exchange
one asset against another when the relative price of the underlying assets follows a diffusion process with natural boundaries
and a quadratic diffusion coefficient. The paper shows in particular how to interpret the option price formula in terms of
exercise probabilities which are calculated under the martingale measures associated with two specific numeraire portfolios.
An application to the pricing of bond options and certain interest rate derivatives illustrates the main results. 相似文献
937.
Abstract. This study examines whether mandatorily redeemable preferred stock (MRPS) is priced more like debt or equity by (1) investigating its debt and equity characteristics and (2) specifying conditions under which one characteristic would dominate the other. Based on a sample of 113 nonconvertible MRPS issued during 1970 to 1990, our results are consistent with the view that MRPS has both debt and equity characteristics. The debt (equity) feature is more pronounced among nonutility (utility) issues. Within the utility group, we find high (low) rated MRPS issues to be more debt (equity) like. Our results appear to support current MRPS disclosure rules. 相似文献
938.
In the past two decades, litigation in many U.S. stateshas triggered educational reform movements designed to reducethe inequalities in educational expenditures across school districts.This paper uses a panel data set across all the states from 1970–1990to examine the role of litigation and educational finance reformin determining the level of education funding in a flexible,dynamic setting. An important finding of our work is that litigationand reform have differential effects across the states, in somecases leading to increases while in other cases decreases inpredicted spending. 相似文献
939.
Charles Goodhart Yuanchen Chang Richard Payne 《Journal of International Money and Finance》1997,16(6):921-930
In this paper we investigate the efficiency of a class of transaction-generating algorithms, originally suggested in Bollerslev and Domowitz (1993). Our comparison utilizes real transaction data recorded over Reuters D2000-2 electronic broking system for 7 h in June 1993 and transaction data generated from FXFX quotations over an identical period. Results suggest that, at this high-frequency data sampling, the performance of these transaction-generating algorithms is poor, with the most likely explanation of this outcome due to the high-frequency characteristics of FXFX spreads and quotation intensity. 相似文献
940.
Recent breakthroughs in the theory of exchange rate target zones have not been followed by similar contributions on the empirical side. The drift adjustment method of evaluating the credibility of a target zone has become common practice. However, the estimates of the expected rate of depreciation inside the band do not model knowledge of the band in the agents' information set. In this paper, a rational expectations limited-dependent variable method to estimate the expected rate of depreciation is used to remedy this weakness. In the case of the franc-mark target zone with daily data covering a 4-year period, we show that expected rates of devaluation of the order of 2.5% were still present in the early 1990s. Their reappearance in the autumn of 1992 may thus not be surprising. 相似文献