全文获取类型
收费全文 | 15670篇 |
免费 | 255篇 |
专业分类
管理学 | 2045篇 |
民族学 | 76篇 |
人才学 | 3篇 |
人口学 | 1406篇 |
丛书文集 | 94篇 |
教育普及 | 2篇 |
理论方法论 | 1413篇 |
综合类 | 376篇 |
社会学 | 7823篇 |
统计学 | 2687篇 |
出版年
2021年 | 80篇 |
2020年 | 238篇 |
2019年 | 285篇 |
2018年 | 332篇 |
2017年 | 485篇 |
2016年 | 384篇 |
2015年 | 289篇 |
2014年 | 337篇 |
2013年 | 2544篇 |
2012年 | 467篇 |
2011年 | 402篇 |
2010年 | 289篇 |
2009年 | 291篇 |
2008年 | 344篇 |
2007年 | 355篇 |
2006年 | 276篇 |
2005年 | 412篇 |
2004年 | 378篇 |
2003年 | 307篇 |
2002年 | 344篇 |
2001年 | 366篇 |
2000年 | 348篇 |
1999年 | 364篇 |
1998年 | 254篇 |
1997年 | 239篇 |
1996年 | 245篇 |
1995年 | 224篇 |
1994年 | 240篇 |
1993年 | 213篇 |
1992年 | 277篇 |
1991年 | 277篇 |
1990年 | 251篇 |
1989年 | 253篇 |
1988年 | 242篇 |
1987年 | 222篇 |
1986年 | 225篇 |
1985年 | 200篇 |
1984年 | 230篇 |
1983年 | 234篇 |
1982年 | 188篇 |
1981年 | 172篇 |
1980年 | 165篇 |
1979年 | 195篇 |
1978年 | 166篇 |
1977年 | 143篇 |
1976年 | 131篇 |
1975年 | 129篇 |
1974年 | 115篇 |
1973年 | 105篇 |
1971年 | 78篇 |
排序方式: 共有10000条查询结果,搜索用时 8 毫秒
41.
42.
This article aims to bring gender into an even tighter transnational migration focus by broadening and deepening our original framework of “gendered geographies of power,” linking it more directly to existing and emerging scholarship. We examine and highlight previously neglected areas such as the role of the state and the social imaginary in gendering transnational processes and experiences. We identify topics that remain under‐appreciated, under‐researched, and/or under‐theorized. Finally, we initiate a discussion of how a gendered analysis of transnational migration can help bridge this particular research to other gendered transnational processes under study that do not privilege migration. 相似文献
43.
William R. Shadish Kevin Ragsdale Renita R. Glaser Linda M. Montgomery 《Journal of marital and family therapy》1995,21(4):345-360
This article reviews the major findings from a multiproject meta-analysis of the effects of marital and family therapy (MFT). Across 163 randomized trials, MFT demonstrates moderate, statistically significant, and often clinically significant effects. No orientation is yet demonstrably superior to any other, nor is MFT superior to individual therapy. Cost effectiveness information is scant in these 163 studies, but supportive. Randomized experiments yield very different answers from nonrandomized experimental studies of the effects of MFT, calling into question whether we should mix the two in reviews. We have also found several new differences in the ways that marital therapy (MT) and family therapy (FT) studies are conducted, making them harder to compare. Finally, important questions still exist about whether any psychotherapy, including MFT, yet has sufficient information about how well research generalizes to everyday clinical practice. 相似文献
44.
45.
46.
Margaret R. Somers 《Theory and Society》1994,23(5):605-649
47.
Charles W. Griffiths Chris Dockins Nicole Owens Nathalie B. Simon Daniel A. Axelrad 《Risk analysis》2002,22(4):679-688
To quantify the health benefits of environmental policies, economists generally require estimates of the reduced probability of illness or death. For policies that reduce exposure to carcinogenic substances, these estimates traditionally have been obtained through the linear extrapolation of experimental dose-response data to low-exposure scenarios as described in the U.S. Environmental Protection Agency's Guidelines for Carcinogen Risk Assessment (1986). In response to evolving scientific knowledge, EPA proposed revisions to the guidelines in 1996. Under the proposed revisions, dose-response relationships would not be estimated for carcinogens thought to exhibit nonlinear modes of action. Such a change in cancer-risk assessment methods and outputs will likely have serious consequences for how benefit-cost analyses of policies aimed at reducing cancer risks are conducted. Any tendency for reduced quantification of effects in environmental risk assessments, such as those contemplated in the revisions to EPA's cancer-risk assessment guidelines, impedes the ability of economic analysts to respond to increasing calls for benefit-cost analysis. This article examines the implications for benefit-cost analysis of carcinogenic exposures of the proposed changes to the 1986 Guidelines and proposes an approach for bounding dose-response relationships when no biologically based models are available. In spite of the more limited quantitative information provided in a carcinogen risk assessment under the proposed revisions to the guidelines, we argue that reasonable bounds on dose-response relationships can be estimated for low-level exposures to nonlinear carcinogens. This approach yields estimates of reduced illness for use in a benefit-cost analysis while incorporating evidence of nonlinearities in the dose-response relationship. As an illustration, the bounding approach is applied to the case of chloroform exposure. 相似文献
48.
Melissa S. Waters R. Carter Hill William J. Moore Robert J. Newman 《Journal of Labor Research》1994,15(4):355-372
This paper estimates a simultaneous-equations model with public sector bargaining laws and union membership treated as jointly-determined
variables. The extent of public sector unionization has a significant positive influence on the passage of prolabor bargaining
legislation and bargaining legislation has strong, independent effects on the extent of public sector unionization.
We gratefully acknowledge the research support provided by Minbo Kim and Parisun Chantonahom. 相似文献
49.
Francis A. O’Connell 《Journal of Labor Research》1991,12(4):322-325
Readers wishing to correspond with Mr. O’Connell may do so through the editorial office of the Journal. 相似文献
50.
Chris Dockins Robin R Jenkins Nicole Owens Nathalie B Simon Lanelle Bembenek Wiggins 《Risk analysis》2002,22(2):335-346
This article explores two problems analysts face in determining how to estimate values for children's health and safety risk reductions. The first addresses the question: Do willingness‐to‐pay estimates for health risk changes differ across children and adults and, if so, how? To answer this question, the article first examines the potential effects of age and risk preferences on willingness to pay. A summary of the literature reporting empirical evidence of differences between willingness to pay for adult health and safety risk reductions and willingness to pay for health and safety risk reductions in children is also provided. The second dimension of the problem is a more fundamental issue: Whose perspective is relevant when valuing children's health effects—society's, children's, adults‐as‐children, or parents'? Each perspective is considered, followed ultimately by the conclusion that adopting a parental perspective through an intrahousehold allocation model seems closest to meeting the needs of the estimation problem at hand. A policy example in which the choice of perspective affects the outcome of a regulatory benefit‐cost analysis rounds out the article and emphasizes the importance of perspective. 相似文献