全文获取类型
收费全文 | 30507篇 |
免费 | 592篇 |
专业分类
财政金融 | 5566篇 |
工业经济 | 2291篇 |
计划管理 | 5192篇 |
经济学 | 6867篇 |
综合类 | 342篇 |
运输经济 | 194篇 |
旅游经济 | 493篇 |
贸易经济 | 4663篇 |
农业经济 | 1465篇 |
经济概况 | 3950篇 |
邮电经济 | 76篇 |
出版年
2021年 | 175篇 |
2020年 | 294篇 |
2019年 | 391篇 |
2018年 | 565篇 |
2017年 | 560篇 |
2016年 | 521篇 |
2015年 | 391篇 |
2014年 | 607篇 |
2013年 | 2944篇 |
2012年 | 812篇 |
2011年 | 887篇 |
2010年 | 714篇 |
2009年 | 851篇 |
2008年 | 898篇 |
2007年 | 811篇 |
2006年 | 749篇 |
2005年 | 687篇 |
2004年 | 697篇 |
2003年 | 681篇 |
2002年 | 633篇 |
2001年 | 647篇 |
2000年 | 629篇 |
1999年 | 541篇 |
1998年 | 565篇 |
1997年 | 516篇 |
1996年 | 523篇 |
1995年 | 474篇 |
1994年 | 521篇 |
1993年 | 521篇 |
1992年 | 493篇 |
1991年 | 518篇 |
1990年 | 466篇 |
1989年 | 394篇 |
1988年 | 399篇 |
1987年 | 395篇 |
1986年 | 407篇 |
1985年 | 594篇 |
1984年 | 555篇 |
1983年 | 560篇 |
1982年 | 541篇 |
1981年 | 472篇 |
1980年 | 454篇 |
1979年 | 470篇 |
1978年 | 404篇 |
1977年 | 355篇 |
1976年 | 281篇 |
1975年 | 269篇 |
1974年 | 259篇 |
1973年 | 244篇 |
1972年 | 198篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
In this paper, we analyze the impact of advertising on markets wheresubjective horizontal and vertical product differentiation are important. A simple model showshow advertising can be used to create subjective horizontal and vertical differentiation.The model predicts that firms are likely to be symmetric when advertising creates subjective horizontaldifferentiation and that name and generic brands are most likely to coexist in markets whereadvertising creates subjective vertical differentiation. In all cases, the ability toadvertise creates distance between products which increases the market power of firms. Finally, severalreal world examples are used to illustrate the conditions under which the model is most relevant. 相似文献
93.
Initial margin requirements represent: (1) a cost impediment to the wealth constrained investor and (2) a potential way of mitigating excessive volatility. However, prior empirical research finds that margins are not an effective tool in reducing volatility. We consider the possibility that margins primarily affect certain stocks and investors. Specifically, we test whether margins affect individuals who, as a group, we believe to be the investors most affected when margin requirements change. Our initial empirical tests, however, do not support this contention. 相似文献
94.
Planning food services for a campus setting 总被引:1,自引:0,他引:1
Kenneth J. Klassen Elzbieta Trybus Arundhati Kumar 《International Journal of Hospitality Management》2005,24(4):579-609
Providing appropriate food services in a campus setting is increasingly important due to more demanding customers and because clients have less time to go off-campus when they need to eat. Using a university campus as an example, this research looks at customer satisfaction with existing food services and explores various methods for determining where to locate new facilities. This campus currently has great needs for additional food services, and it is shown clearly where additional food services are required. Also, the methods used are compared in terms of their effectiveness in finding the solution. 相似文献
95.
Douglas M. Lambert Sebastin J. García‐Dastugue Keely L. Croxton 《Journal of Business Logistics》2005,26(1):25-51
Supply chain management (SCM) is implemented by integrating corporate functions using business processes within and across companies. Several process‐oriented frameworks for SCM have been proposed but only two of these provide sufficient detail to enable implementation. We evaluate the Supply‐Chain Operations Reference (SCOR) framework and The Global Supply Chain Forum (GSCF) framework using four criteria and identify their relative strengths and weaknesses. 相似文献
96.
97.
98.
99.
Conventional housing price index models assume interperiodparameter stability and typically employ either repeat sales or hedonic methodologies. This paper introduces a method of index construction that combines multiple sales observations with single sale transactions while permitting characteristics prices from hedonic regressions to vary over time. A test for interperiod parameter stability is provided. Each period's data are arranged by location and repeat sales are matched by rows. This construction allows greater use of sample information and acknowledges the unique contribution of repeat sales to the estimation process. It also produces intertemporal error correlations that can be beneficially exploited by the seemingly unrelated regressions (SUH) technique. The paper also demonstrates a significance test for error correlation and discusses the treatment of unequal numbers of observations among index periods. 相似文献
100.
J I Barnes 《Development Southern Africa》1995,12(6):783-803
Financial and economic cost‐benefit models were applied to determine the worth of several planned community‐based, wildlife utilisation initiatives in Botswana, and to identify policy guidelines. Projects planned to incorporate small‐scale wildlife cropping. Rentals from safari‐hunting or wildlife‐viewing activities were found to have inherent viability, both financially and economically, particularly in the north of the country, where tourism is greatest. However, success is dependent on both good management and high densities of wildlife. In the Kalahari, game at low densities (more than 100 hectares per large stock unit) cannot be cropped profitably by communities and investments in game protection will result in economic gain. At higher game densities (between 100 and about 25 hectares per large stock unit), positive financial returns are possible with community‐based cropping but two considerations are important. First, investment in protection continues to pay economically and, second, cropping at close to maximum sustainable intensity is most profitable economically. Selective protection aimed at restoring proportions of drought‐sensitive game species also appears economically rewarding. 相似文献