全文获取类型
收费全文 | 13959篇 |
免费 | 313篇 |
国内免费 | 13篇 |
专业分类
财政金融 | 2413篇 |
工业经济 | 1070篇 |
计划管理 | 2327篇 |
经济学 | 2989篇 |
综合类 | 301篇 |
运输经济 | 92篇 |
旅游经济 | 301篇 |
贸易经济 | 2529篇 |
农业经济 | 760篇 |
经济概况 | 1480篇 |
邮电经济 | 23篇 |
出版年
2021年 | 88篇 |
2020年 | 151篇 |
2019年 | 225篇 |
2018年 | 286篇 |
2017年 | 319篇 |
2016年 | 305篇 |
2015年 | 214篇 |
2014年 | 323篇 |
2013年 | 1343篇 |
2012年 | 377篇 |
2011年 | 397篇 |
2010年 | 382篇 |
2009年 | 405篇 |
2008年 | 457篇 |
2007年 | 429篇 |
2006年 | 349篇 |
2005年 | 338篇 |
2004年 | 307篇 |
2003年 | 311篇 |
2002年 | 293篇 |
2001年 | 283篇 |
2000年 | 284篇 |
1999年 | 255篇 |
1998年 | 266篇 |
1997年 | 264篇 |
1996年 | 265篇 |
1995年 | 239篇 |
1994年 | 229篇 |
1993年 | 251篇 |
1992年 | 239篇 |
1991年 | 229篇 |
1990年 | 215篇 |
1989年 | 185篇 |
1988年 | 144篇 |
1987年 | 177篇 |
1986年 | 176篇 |
1985年 | 260篇 |
1984年 | 273篇 |
1983年 | 265篇 |
1982年 | 236篇 |
1981年 | 235篇 |
1980年 | 200篇 |
1979年 | 209篇 |
1978年 | 152篇 |
1977年 | 157篇 |
1976年 | 135篇 |
1975年 | 108篇 |
1974年 | 102篇 |
1973年 | 93篇 |
1972年 | 66篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
M.L. Emiliani Author Vitae 《Industrial Marketing Management》2005,34(5):526-534
In response to real and perceived abuse by market makers, buyers, and sellers, some industry trade groups representing suppliers have developed voluntary codes of conduct, white papers, and other forms of guidance for online reverse auction participants. The intent of these guidelines is to improve both the reverse auction process and relationships between buyers and sellers. This paper examines the rationale for creating guidelines and codes of conduct, and examines their efficacy in regulating reverse auctions to achieve improved outcomes for market makers, buyers, and sellers. Data from primary and related secondary sources indicate that industry-specific codes of conduct and guidelines have not had a favorable impact. 相似文献
92.
当今世界,人才资源已成为最重要的战略资源,人才不仅在国际竞争中越来越具有决定性意义,而且在国内竞争中也发挥着愈来愈重要的作用。从某种意义上讲,区域经济的竞争实际上就是人才的竞争。一个地区经济越发达,集聚的人才也就越多,而人才集聚得越多,也就越能促进当地发展。改革 相似文献
93.
94.
Operational Research and the environment 总被引:1,自引:1,他引:0
The discipline of Operational Research (OR) is primarily concerned with improving the effectiveness and efficiency of decision processes. These processes take place everywhere in society: industry, banking, agriculture, government, politics. Frequent use of mathematical optimization models is typical of OR. Since the early '80s these models are increasingly packaged in a user-friendly way, as Decision Support Systems. In the following we will illustrate how OR can be used to describe and solve a number of environmental problems. 相似文献
95.
Walker LM 《Medical economics》1992,69(13):155-8, 160-3
96.
Solomon GL 《Medical economics》1992,69(21):179-80, 182
97.
To examine the relationship between participation in a wellness program and the amount of absenteeism and medical claims, seven years of retrospective absenteeism and medical claims records were collected for 207 employees (pre- and postwellness intervention) and entered into a database. A proportional stratified random sample of workers by wellness participation was selected. While there was no significant change in the amount of sick leave taken over time, a log transformation revealed a significant increase in the dollar amount of medical claims over time, particularly for the middle-aged group of employees. This confirms that wellness intervention slowed the rate of increasing claims among middle-aged participants after just three years of wellness intervention. 相似文献
98.
Finkel ML 《Benefits quarterly》1992,8(1):28-33
The elimination of unneeded services is a key to reducing medical costs and enhancing quality of care. Diagnostic tests have been a target of efforts to reduce costs primarily because they are discretionary and often appear to be unnecessary. Believing that the concept of prior review for many diagnostic tests is a good one, this pilot study sought to evaluate prospectively the propriety of diagnostic tests ordered during the first half of 1989 on individuals insured through a major insurance carrier. A physician review found that 21% of the tests were deemed inappropriate, leading to the conclusion that prospective review can be an effective means of screening inappropriately ordered tests. 相似文献
99.
An aging population with nearly unlimited access to high-priced doctors and technology is pushing medical costs skyward. Managed care is the best way to bring them down. 相似文献
100.
Richman LS 《Fortune》1992,126(3):34-40
Many more than ever face the crises of childhood: violence, drugs, bad schools, poverty, divorce, or two parents at work. And no one seems to care. 相似文献