首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   19905篇
  免费   365篇
管理学   2417篇
民族学   113篇
人才学   6篇
人口学   1881篇
丛书文集   124篇
教育普及   2篇
理论方法论   1796篇
现状及发展   1篇
综合类   353篇
社会学   9808篇
统计学   3769篇
  2023年   105篇
  2022年   90篇
  2021年   111篇
  2020年   325篇
  2019年   509篇
  2018年   511篇
  2017年   720篇
  2016年   512篇
  2015年   386篇
  2014年   487篇
  2013年   3264篇
  2012年   828篇
  2011年   630篇
  2010年   498篇
  2009年   474篇
  2008年   526篇
  2007年   531篇
  2006年   483篇
  2005年   453篇
  2004年   496篇
  2003年   468篇
  2002年   448篇
  2001年   507篇
  2000年   410篇
  1999年   382篇
  1998年   313篇
  1997年   283篇
  1996年   296篇
  1995年   278篇
  1994年   264篇
  1993年   254篇
  1992年   301篇
  1991年   293篇
  1990年   265篇
  1989年   264篇
  1988年   247篇
  1987年   235篇
  1986年   219篇
  1985年   249篇
  1984年   239篇
  1983年   238篇
  1982年   181篇
  1981年   162篇
  1980年   176篇
  1979年   171篇
  1978年   146篇
  1977年   141篇
  1976年   123篇
  1975年   116篇
  1974年   100篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
811.
812.
While there is a global shift towards smaller families, some groups maintain relatively high fertility rates. The 2013 New Zealand census data were used to investigate the nature of fertility between ethnicities in New Zealand. The NZ Deprivation Index 2013 was used as a measure of socioeconomic status to determine the relationships with fertility. The results mirror research outside of New Zealand in that socioeconomic status is inversely correlated to fertility. Using crude average fertility rates, sole-ethnicity Pasifika and Māori ethnic groups still have substantially higher fertility than sole-ethnicity Europeans and Asians ethnic groups, even when simultaneously accounting for age, socioeconomic status, education, and religious affiliation. Christians have more children than individuals reportedly without any religion, and fertility rates drop on average for mothers who have higher formal qualifications. Our findings suggest that cultural, or other ethnic-specific factors differentially affect fertility for Māori, Pasifika, New Zealand European, and Asians as aggregated ethnic categories, respectively.  相似文献   
813.
814.
Nigeria's oil guarantees its role in the global economy; however, the state's overwhelming weaknesses perpetuate a high level of volatility vis-à-vis the potential for an immediate disruption of the national, regional, and global environment. This study presents a current qualitative analysis of Nigeria to produce a model that characterizes current conditions in the state and the state response to the nefarious acts in the delta region. This model will serve as a baseline for a significant iteration of the model that reflects the delta region counter-insurgency at various levels of strength: a what-if scenario of the region with an increase of state security over southern separatists, insurgents seeking to gain control of the oil assets. The conjectured model serves to inform/educate decision and policy makers in developing proactive, effective strategies to counter existent and potential threats in the Niger Delta.  相似文献   
815.
In this paper we seek to explain the activity presidential position taking on roll call votes in the House. Position taking may help presidents pursue their policy agendas, but time and available resources constrain their ability to take positions. Even though position taking is a discretionary presidential action, it occurs in the legislative arena and, thus, presidents must consider elements in both institutions as well as outside conditions when making this decision. Accordingly, we posit a multiple perspectives approach to explain the number of presidential positions on votes in the House. Our multivariate two-stage least squares regression reveals that variables from all three environments (executive, legislative and exogenous) within our multiple perspectives approach are necessary to adequately explain presidential position taking overall and when divided according to domestic and foreign policy positions.  相似文献   
816.
817.
In late 2009 China launched an innovative, voluntary programme that by 2011 had extended pension coverage to 326.4 million people in the rural sector, including contributors and beneficiaries. It requires one contribution per year and provides a flat‐rate benefit and a contributions‐related benefit through a contributory individual account, with a government guarantee that the benefit will continue for life. The programme encourages participation of persons who do not pay income taxes, and thus have no tax incentive to participate, by providing substantial government subsidies. As a further incentive, old‐age benefits are provided to older parents when all their adult children participate in the contributory programme.  相似文献   
818.
819.
This article describes the development and evaluation of an intergenerational service-learning course designed to promote social work gerocompetencies. Service-learning opportunities were structured into the course, including an optional evidence-based falls prevention program, for older adults, entitled A Matter of Balance (MOB). Significant differences between pre- and posttest scores on the Geriatric Social Work Competency Scale (GSWCS) were noted for students in the service learning course (n = 13). Once MOB was introduced as an independent variable, the MOB participants scored the highest mean posttest scores for 2 GSWCS domains: values, ethics, and theoretical perspectives; and intervention. The benefits of utilizing social work gerocompetencies to guide course objectives, content, and student outcomes are discussed.  相似文献   
820.
Pulier (2000, Theory and Decision 49: 291) and Machina (2000, Theory and Decision 49: 293) seek to dissolve the Barrett–Arntzenius infinite decision puzzle (1999, Theory and Decision 46: 101). The proposed dissolutions, however, are based on misunderstandings concerning how the puzzle works and the nature of supertasks more generally. We will describe the puzzle in a simplified form, address the recent misunderstandings, and describe possible morals for decision theory.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号