全文获取类型
收费全文 | 30934篇 |
免费 | 703篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 6182篇 |
工业经济 | 2480篇 |
计划管理 | 5058篇 |
经济学 | 6700篇 |
综合类 | 390篇 |
运输经济 | 226篇 |
旅游经济 | 493篇 |
贸易经济 | 5094篇 |
农业经济 | 1455篇 |
经济概况 | 3537篇 |
信息产业经济 | 3篇 |
邮电经济 | 20篇 |
出版年
2021年 | 189篇 |
2020年 | 398篇 |
2019年 | 504篇 |
2018年 | 637篇 |
2017年 | 651篇 |
2016年 | 605篇 |
2015年 | 435篇 |
2014年 | 655篇 |
2013年 | 3323篇 |
2012年 | 839篇 |
2011年 | 1012篇 |
2010年 | 907篇 |
2009年 | 997篇 |
2008年 | 856篇 |
2007年 | 855篇 |
2006年 | 733篇 |
2005年 | 604篇 |
2004年 | 617篇 |
2003年 | 621篇 |
2002年 | 644篇 |
2001年 | 589篇 |
2000年 | 644篇 |
1999年 | 600篇 |
1998年 | 628篇 |
1997年 | 588篇 |
1996年 | 523篇 |
1995年 | 508篇 |
1994年 | 510篇 |
1993年 | 496篇 |
1992年 | 555篇 |
1991年 | 525篇 |
1990年 | 436篇 |
1989年 | 378篇 |
1988年 | 360篇 |
1987年 | 394篇 |
1986年 | 400篇 |
1985年 | 571篇 |
1984年 | 606篇 |
1983年 | 563篇 |
1982年 | 501篇 |
1981年 | 479篇 |
1980年 | 441篇 |
1979年 | 450篇 |
1978年 | 357篇 |
1977年 | 326篇 |
1976年 | 282篇 |
1975年 | 302篇 |
1974年 | 240篇 |
1973年 | 223篇 |
1972年 | 157篇 |
排序方式: 共有10000条查询结果,搜索用时 11 毫秒
31.
John E. Keith David L. Barkley 《Review of urban and regional development studies : RURDS : journal of the Applied Regional Conference》1991,3(1):60-77
A study of the location of three classifications of high-tech industries in rural areas was undertaken using ordinary least squares, Tobit, and a two-step estimation procedure suggested by Heckman (1976). The results indicate that the location decision for high tech firms is influenced primarily by the county population, adjacency to an SMSA, and the expenditures on public infrastructure (exclusive of education expenditures). However, location near interstate highways was generally not a significant factor. Results were similar between branch and unit (single ownership) plants. Some differences in signs of orders of magnitude occurred among the estimation procedures. Making a choice between Tobit and Heckman approaches depends upon the goal of the research. 相似文献
32.
We argue that firms with interdependent worker productivity, team production, have a higher cost of absence and, as a consequence, spend additional resources on monitoring absence. As a result, firms with team production should have lower absence rates. We estimate the determinants of absence for blue‐collar workers using a sample of German manufacturing establishments. Workplace teams are used as a proxy for team production. The estimates reveal that firms with teams have lower absence rates, as do smaller establishments. The size effect, however, is unique to establishments with teams, which fits prior theoretical work that has not been previously tested. 相似文献
33.
34.
Recent research in finance has indicated that the institutional structure in which financial asset prices are determined can have a nontrivial impact on pricing. This report examines transaction level data for Treasury Note futures contracts traded at the Chicago Board of Trade (CBOT) to identify institutional, or market microstructure, impacts on the pricing of these contracts. Relatively few articles have conducted empirical research on the microstructure of U.S. futures trading due to the limited availability of comprehensive transaction level data from the futures exchanges. This report uses the CBOT's Computerized Trade Reconstruction database, a comprehensive transaction level dataset, to identify the price impact of the time duration between trades in a manner analogous to that of A. Dufour and R. F. Engle (2000). Unique differences from prior research include the application to futures contracts with their relative higher frequency of trading, as well as the investigation of the price impact of the number of active traders present on the trading floor and the trading volume. Subsequent price and sign of trade significantly relate to the time duration between trades, the number of floor brokers, and the trading volume. © 2004 Wiley Periodicals, Inc. Jrl. Fut Mark 24:965–980, 2004 相似文献
35.
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
36.
This study examines how two dimensions of strategic orientation (customer and competitor orientation) influence logistics and market performance. Two capabilities, operational flexibility and collaboration, are studied. Data were collected from manufacturers working with third party logistics providers. The findings suggest that customer and competitor orientations have different influences upon performance when leveraged through the capabilities. Competitor orientation, while having a detrimental direct effect on logistics performance, appears to be the better strategic approach, when supported with operational flexibility since it results in enhanced logistics (efficiency) and market (effectiveness) performance. Customer orientation, on the other hand, greatly improves logistics performance, i.e., internal efficiency. 相似文献
37.
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
38.
Cross‐docking replaces traditional warehousing, enabling continuous flow of items without storage. Here we model location‐distribution networks, that include cross‐docking facilities, to obtain the latter's impact on the supply chain. We formulate optimization models to minimize total cost in three multi‐echelon networks, each model generalizing the preceding one. The first includes a single manufacturer, one product type, and multiple customers. Cross‐docks are to be located between origin and destinations. Besides solving optimally, a tool for quantitative analysis of direct‐shipment decisions is developed. The second model considers more than one product: We determine a cost‐effective sequence of items for indirect shipment (via cross‐docks). Finally, in a network with multiple origins, optimal solutions are obtained for 40 medium‐sized and larger examples. 相似文献
39.
40.
Several papers have been published demonstrating the positive effects a single, reputable ally has on evaluations of a focal brand. Interestingly, little research has been published examining the effects of multiple brand allies. We examine the effect of an alliance with two, one, or zero well-known brand allies on evaluations of a previously unknown focal brand. The presence of a single brand ally significantly increased perceived quality and hedonic and utilitarian attitudes. While multiple alliances improved focal brand evaluations relative to the no ally condition, the second ally did not increase evaluations relative to the single ally condition. 相似文献