全文获取类型
收费全文 | 2283篇 |
免费 | 28篇 |
专业分类
管理学 | 309篇 |
民族学 | 7篇 |
人口学 | 200篇 |
丛书文集 | 10篇 |
理论方法论 | 223篇 |
综合类 | 55篇 |
社会学 | 899篇 |
统计学 | 608篇 |
出版年
2023年 | 15篇 |
2021年 | 18篇 |
2020年 | 36篇 |
2019年 | 68篇 |
2018年 | 76篇 |
2017年 | 88篇 |
2016年 | 70篇 |
2015年 | 42篇 |
2014年 | 61篇 |
2013年 | 407篇 |
2012年 | 108篇 |
2011年 | 75篇 |
2010年 | 54篇 |
2009年 | 60篇 |
2008年 | 42篇 |
2007年 | 45篇 |
2006年 | 47篇 |
2005年 | 33篇 |
2004年 | 34篇 |
2003年 | 34篇 |
2002年 | 30篇 |
2001年 | 49篇 |
2000年 | 54篇 |
1999年 | 61篇 |
1998年 | 43篇 |
1997年 | 36篇 |
1996年 | 26篇 |
1995年 | 37篇 |
1994年 | 33篇 |
1993年 | 32篇 |
1992年 | 28篇 |
1991年 | 28篇 |
1990年 | 28篇 |
1989年 | 19篇 |
1988年 | 26篇 |
1987年 | 34篇 |
1986年 | 25篇 |
1985年 | 29篇 |
1984年 | 34篇 |
1983年 | 22篇 |
1982年 | 24篇 |
1981年 | 19篇 |
1980年 | 18篇 |
1979年 | 17篇 |
1978年 | 17篇 |
1977年 | 15篇 |
1976年 | 15篇 |
1975年 | 12篇 |
1974年 | 12篇 |
1973年 | 13篇 |
排序方式: 共有2311条查询结果,搜索用时 0 毫秒
31.
Burnley IH 《The International migration review》1978,12(3):341-358
32.
33.
Interest in the efficiency or inefficiency of non-profit firms has spawned research on the administrative costs of Blue Cross and Blue Shield plans. Relying on plausible implications of the property rights theory of the firm, both Blair, Ginsburg, and Vogel (1975) and Vogel (1977) noted some evidence of inefficiency in these firms. Our analysis, however, utilizing their models and more recent data, reveals little convincing evidence for the view that Blue Shield plans are inefficient. 相似文献
34.
35.
A discussion of the 1980 U.S. census is presented. The authors suggest that the taking of a national census is not just a statistical exercise, but an exercise involving ethics, epistemology, law, and politics. They contend that conducting a national census can be defined as an ill-structured problem in which the various complexities imposed by multidisciplinarity cannot be separated. "The 1980 census is discussed as an ill-structured problem, and a method for treating such problems is presented, within which statistical information is only one component." 相似文献
36.
Rockett IR 《International migration (Geneva, Switzerland)》1983,21(3):358-371
The relationship between the ethnic characteristics of immigrants to the United States and their occupational mobility in the short term is explored. The data concern the period 1965-1970 and are taken from the 1970 census. The results indicate that race and sociocultural distance have important effects on occupational mobility. The study also shows that if educational status is controlled, the performance of Asian immigrants is more similar to that of blacks or Hispanics than it is to that of whites. (summary in FRE, SPA) 相似文献
37.
38.
The paper presents a general method of designing constant-factor approximation algorithms for some discrete optimization problems with assignment-type constraints. The core of the method is a simple deterministic procedure of rounding of linear relaxations (referred to as pipage rounding). With the help of the method we design approximation algorithms with better performance guarantees for some well-known problems including MAXIMUM COVERAGE, MAX CUT with given sizes of parts and some of their generalizations. 相似文献
39.
This paper presents a strategic analysis of the network design problem faced by pickup and delivery companies operating in metropolitan areas and serving two or more classes of customers. The focus is on a division that treats commercial and residential customers separately, a situation motivated by their respective geographic densities and the size and frequency of their demand. In constructing driver work areas, it is necessary to take into account expected demand, vehicle capacity, time on the road, and the aspect ratio of the individual territories. This leads to a capacitated clustering problem with side constraints that has been the subject of intense research over the last decade. 相似文献
40.
Galiè A. Teufel N. Korir L. Baltenweck I. Webb Girard A. Dominguez-Salas P. Yount K. M. 《Social indicators research》2019,142(2):799-825
Social Indicators Research - The empowerment of women in the livestock sector is fundamental to achieve gender equality. It also is instrumental for increased household productivity and improved... 相似文献