全文获取类型
收费全文 | 90532篇 |
免费 | 2875篇 |
国内免费 | 3篇 |
专业分类
管理学 | 12525篇 |
民族学 | 550篇 |
人才学 | 26篇 |
人口学 | 6846篇 |
丛书文集 | 519篇 |
理论方法论 | 9607篇 |
综合类 | 2128篇 |
社会学 | 42244篇 |
统计学 | 18965篇 |
出版年
2023年 | 523篇 |
2021年 | 578篇 |
2020年 | 1537篇 |
2019年 | 2278篇 |
2018年 | 2098篇 |
2017年 | 3210篇 |
2016年 | 2398篇 |
2015年 | 2101篇 |
2014年 | 2670篇 |
2013年 | 19149篇 |
2012年 | 2401篇 |
2011年 | 2204篇 |
2010年 | 2018篇 |
2009年 | 2214篇 |
2008年 | 2062篇 |
2007年 | 1882篇 |
2006年 | 2131篇 |
2005年 | 2303篇 |
2004年 | 2203篇 |
2003年 | 1895篇 |
2002年 | 2021篇 |
2001年 | 1958篇 |
2000年 | 1731篇 |
1999年 | 1646篇 |
1998年 | 1489篇 |
1997年 | 1351篇 |
1996年 | 1289篇 |
1995年 | 1321篇 |
1994年 | 1292篇 |
1993年 | 1276篇 |
1992年 | 1242篇 |
1991年 | 1165篇 |
1990年 | 1147篇 |
1989年 | 996篇 |
1988年 | 1080篇 |
1987年 | 956篇 |
1986年 | 855篇 |
1985年 | 1029篇 |
1984年 | 1107篇 |
1983年 | 994篇 |
1982年 | 921篇 |
1981年 | 855篇 |
1980年 | 809篇 |
1979年 | 857篇 |
1978年 | 761篇 |
1977年 | 680篇 |
1976年 | 651篇 |
1975年 | 631篇 |
1974年 | 506篇 |
1973年 | 428篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
Has Opposition to Immigration Increased in the United States after the Economic Crisis? An Experimental Approach
下载免费PDF全文
![点击此处可从《The International migration review》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Mathew J. Creighton Amaney Jamal Natalia C. Malancu 《The International migration review》2015,49(3):727-756
We employ two population‐level experiments to accurately measure opposition to immigration before and after the economic crisis of 2008. Our design explicitly addresses social desirability bias, which is the tendency to give responses that are seen favorably by others and can lead to substantial underreporting of opposition to immigration. We find that overt opposition to immigration, expressed as support for a closed border, increases slightly after the crisis. However, once we account for social desirability bias, no significant increase remains. We conclude that the observed increase in anti‐immigration sentiment in the post‐crisis United States is attributable to greater expression of opposition rather than any underlying change in attitudes. 相似文献
12.
13.
In this article, we propose a novel approach for testing the equality of two log-normal populations using a computational approach test (CAT) that does not require explicit knowledge of the sampling distribution of the test statistic. Simulation studies demonstrate that the proposed approach can perform hypothesis testing with satisfying actual size even at small sample sizes. Overall, it is superior to other existing methods. Also, a CAT is proposed for testing about reliability of two log-normal populations when the means are the same. Simulations show that the actual size of this new approach is close to nominal level and better than the score test. At the end, the proposed methods are illustrated using two examples. 相似文献
14.
15.
16.
Michael Greenberg Anthony Cox Vicki Bier Jim Lambert Karen Lowrie Warner North Michael Siegrist Felicia Wu 《Risk analysis》2020,40(Z1):2113-2127
As part of the celebration of the 40th anniversary of the Society for Risk Analysis and Risk Analysis: An International Journal, this essay reviews the 10 most important accomplishments of risk analysis from 1980 to 2010, outlines major accomplishments in three major categories from 2011 to 2019, discusses how editors circulate authors’ accomplishments, and proposes 10 major risk-related challenges for 2020–2030. Authors conclude that the next decade will severely test the field of risk analysis. 相似文献
17.
18.
Feminist and empowerment theories are especially important to the understanding of individual and sociopolitical levels of social work assessment and intervention. Incorporating feminist and empowerment approaches in practice will provide social workers with the knowledge, values and skills most likely to promote human rights and social justice. In this paper, we present an overview of both theories and illustrate them with a case example. 相似文献
19.
20.
Michael Rodriguez 《Serials Review》2020,46(2):150-156
AbstractAccessibility of library electronic resources is a must. Its importance derives from professional ethics of librarianship, rising total costs of acquisition, and mounting legal challenges to colleges and universities that fail to provide resources accessible to users with disabilities. Library staff are responsible for ensuring the accessibility of vendor-licensed eresources. This column reviews the accessibility clauses of nine model license agreements for electronic resources. It describes terms that should go into an optimal accessibility clause and creates a composite model clause. It also provides guidance for library staff seeking to negotiate stronger accessibility language into vendor license agreements. Finally, it addresses the impact of accommodation requests on the total cost of acquiring library eresources, concluding with a call to redouble efforts to advocate for greater accessibility and educate both vendors and library staff about its importance. 相似文献