全文获取类型
收费全文 | 47560篇 |
免费 | 986篇 |
专业分类
财政金融 | 8614篇 |
工业经济 | 3542篇 |
计划管理 | 8099篇 |
经济学 | 10763篇 |
综合类 | 442篇 |
运输经济 | 386篇 |
旅游经济 | 748篇 |
贸易经济 | 7668篇 |
农业经济 | 2330篇 |
经济概况 | 5836篇 |
信息产业经济 | 4篇 |
邮电经济 | 114篇 |
出版年
2021年 | 327篇 |
2020年 | 574篇 |
2019年 | 831篇 |
2018年 | 1081篇 |
2017年 | 1091篇 |
2016年 | 1062篇 |
2015年 | 708篇 |
2014年 | 1141篇 |
2013年 | 4890篇 |
2012年 | 1517篇 |
2011年 | 1548篇 |
2010年 | 1395篇 |
2009年 | 1566篇 |
2008年 | 1444篇 |
2007年 | 1228篇 |
2006年 | 1170篇 |
2005年 | 998篇 |
2004年 | 954篇 |
2003年 | 958篇 |
2002年 | 904篇 |
2001年 | 935篇 |
2000年 | 968篇 |
1999年 | 875篇 |
1998年 | 870篇 |
1997年 | 818篇 |
1996年 | 816篇 |
1995年 | 726篇 |
1994年 | 737篇 |
1993年 | 733篇 |
1992年 | 771篇 |
1991年 | 751篇 |
1990年 | 712篇 |
1989年 | 587篇 |
1988年 | 558篇 |
1987年 | 557篇 |
1986年 | 566篇 |
1985年 | 809篇 |
1984年 | 778篇 |
1983年 | 729篇 |
1982年 | 658篇 |
1981年 | 657篇 |
1980年 | 662篇 |
1979年 | 622篇 |
1978年 | 513篇 |
1977年 | 463篇 |
1976年 | 433篇 |
1975年 | 400篇 |
1974年 | 344篇 |
1973年 | 345篇 |
1972年 | 260篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
The purpose of this study was to assess the basis behavior of the Live Cattle Futures contract at the Chicago Mercantile Exchange (CME) before and after the 1995 contract changes. Additionally, an alternative method of basis calculation utilizing weighted mean futures prices versus settlement futures prices was compared to determine which method provides a better representation of the basis level. Within a regression model with heteroskedascity error framework, we found that the level of nearby basis in the period after June 1995 has shifted lower and the average monthly open interest of net commercial long positions has substantially increased after the contract modifications. These empirical results are consistent with the notion that more long activity entered the market in response to the contract modifications. Additionally, an alternative (new) measure of basis calculation (cash price minus weighted mean futures price) produced similar results to two other commonly used measures. In conclusion, the 1995 contract changes have neither increased nor decreased the volatility of live cattle basis. © 2004 Wiley Periodicals, Inc. Jrl Fut Mark 24:557–590, 2004 相似文献
53.
The primary purpose of this paper was to empirically explore some of the reasons that logistics has become more important, or salient, in comparison to other functions within the firm. A survey of 296 managers across multiple industries in the U.S. found logistics becomes more important within the firm when the industry increases in uncertainty, when there is an emphasis on time‐based competition, when there is greater adoption of information technology, and when there is an emphasis on cross‐functional integration. 相似文献
54.
John C. Taylor Stanley E. Fawcett George C. Jackson 《Journal of Business Logistics》2004,25(2):119-137
The purpose of this article is to study the level of “in‐stock” customer service performance being offered in the catalog channel of distribution. The article provides benchmark information for the catalog industry. More importantly, the article serves as one test of the effectiveness of the modern supply chain, where the expectation is for near perfect orders. Customer service levels are studied by using an empirical observation methodology in which catalog retailer's in‐stock performance was measured. Comparisons are made across item type, season, retailer type, and days from catalog receipt. Overall, items were out‐of‐stock during 15.9% of all checkpoints, compared to an 11.8% stock‐out rate in an earlier study of bricks and mortar retailers. 相似文献
55.
56.
We apply a discrete choice approach to model the empirical behaviour of the Federal Reserve in changing the federal funds target rate, the benchmark of short‐term market interest rates in the US. Our methods allow the explanatory variables to be nonstationary as well as stationary. This feature is particularly useful in the present application as many economic fundamentals that are monitored by the Fed and are believed to affect decisions to adjust interest rate targets display some nonstationarity over time. The chosen model successfully predicts the majority of the target rate changes during the time period considered (1994–2001) and helps to explain strings of similar intervention decisions by the Fed. Based on the model‐implied optimal interest rate, our findings suggest that there is a lag in the Fed's reaction to economic shocks during this period. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
57.
Biosecurity and wine tourism 总被引:1,自引:0,他引:1
58.
The principal aim of this paper is to evaluate the impact of the future European high-speed train network on accessibility, by reducing time distance between places and modifying their relative location. We compare the current situation with that foreseen for the year 2010, according to the Outline Plan of the European High-Speed Train Network, in order to analyse which areas will most benefit from construction and improvement of the infrastructure. It is hypothesized that the high-speed train will certainly bring the peripheral regions closer to the central ones, but will also increase imbalances between the main cities and their hinterlands. A weighted average distance indicator is applied for this purpose. This measure identifies the spatial distribution of accessibility in the area of study, emphasizing the infrastructure effects, and locates accessibility changes at the European level. A Geographic Information System (GIS) has been used to carry out this study. 相似文献
59.
60.