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   8402篇
  免费   129篇
  国内免费   1篇
管理学   1131篇
民族学   31篇
人口学   733篇
丛书文集   32篇
理论方法论   726篇
综合类   134篇
社会学   3778篇
统计学   1967篇
  2020年   118篇
  2019年   176篇
  2018年   167篇
  2017年   262篇
  2016年   179篇
  2015年   158篇
  2014年   190篇
  2013年   1571篇
  2012年   249篇
  2011年   202篇
  2010年   189篇
  2009年   164篇
  2008年   233篇
  2007年   229篇
  2006年   184篇
  2005年   162篇
  2004年   142篇
  2003年   133篇
  2002年   151篇
  2001年   190篇
  2000年   168篇
  1999年   150篇
  1998年   132篇
  1997年   133篇
  1996年   125篇
  1995年   112篇
  1994年   85篇
  1993年   133篇
  1992年   141篇
  1991年   122篇
  1990年   136篇
  1989年   110篇
  1988年   108篇
  1987年   112篇
  1986年   104篇
  1985年   89篇
  1984年   118篇
  1983年   101篇
  1982年   99篇
  1981年   68篇
  1980年   96篇
  1979年   105篇
  1978年   73篇
  1977年   86篇
  1976年   71篇
  1975年   88篇
  1974年   69篇
  1973年   55篇
  1972年   62篇
  1971年   52篇
排序方式: 共有8532条查询结果,搜索用时 0 毫秒
91.
92.
The Community Prevention Trial was 5-year effort to reduce alcohol-involved injuries and death through a comprehensive program of community awareness and policy activities. The three experimental communities were of approximately 100,000 population each (one in Northern California, one in Southern California, and one in South Carolina). Matched comparison communities were used for each experimental community. This article describes the evaluation approach used in a program that sought to change environmental factors not a specific population or target group. This approach demanded unique evaluation approaches for determining overall community aggregate effects, that is, distal outcomes, as well as changes in key mediating variables, that is, process effects. The problem of trending and lagged effects of community prevention programs are discussed.  相似文献   
93.
This article provides recommendations and observations about evaluation of a locally based prevention project to reduce problems at a total community or aggregate level. The shift from targeting specific individuals or subpopulations to the overall structure and environment of a community is most demanding. Evaluation tools and analysis techniques have lagged behind program development because community-level interventions are not linked to a specific target group who can be separately studied. Thus assumptions about using random assignment and/or comparison communities as means to control for confounding variables are weakened when the unit of analysis is the community itself and dependent measures are subject to trending and the effects of history.  相似文献   
94.
Using data from the 1984 panel of the Survey of Income and Program Participation (SIPP), this article examines characteristics of the older population disaggregated by net-worth quintiles. The authors argue that income is not a sufficient measure of economic status for current policy discussions on issues such as changing Medicare co-payments, increasing the taxation of social security benefits, or means-testing under Medicaid. Net worth is a better measure of economic status, particularly for the elderly, because it represents the net value of assets accumulated over the life course. Their results indicate that there is considerable diversity in the economic status of the older population, which is masked by aggregate statistics (such as means and medians) typically used to summarize the economic status of population groups. Stereotypical views of the elderly based on such aggregates result in misdirected policy formulation. In the future, policymakers will need to formulate policies and programs using information on the distributions of income and assets among the older populations rather than relying on statistical aggregates.  相似文献   
95.
Little is known about why nonprofits accrue debt, how much they owe, and whether the funds they borrow are used productively. This article distinguishes between productive, problematic, and deferred debt. Employing a data base representative of 114,726 tax-filing charitable nonprofits in the United States in 1986, it examines the pervasiveness of nonprofit debt and the relation between this debt and nonprofit financial health. The analysis finds that over 70 percent of the nonprofits hold debt, the distribution of this debt is highly concentrated, and the level of debt and leverage varies with asset size and type of activity. Nonprofits with higher leverage and absolute debt levels are financially healthier than those with lower levels. While the analysis does not determine whether financially stronger nonprofits are better able to borrow, the results support the view that borrowing in the nonprofit sector is economically efficient.  相似文献   
96.
This article is offered in a nod to all those readers who have been exposed to "whole brain" theory, either through the American College of Physician Executives or elsewhere. As managers struggle with balancing the "left brain" and "right brain" aspects of their work, the author says, they might consider exploiting a third area of activity, or inactivity--the "no brain." This center position can be especially effective in dealing with the high-technology aspects of delivering health care.  相似文献   
97.
98.
The biotechnical "revolution" has fast come upon us. It promises to produce both substantial benefits and difficult dilemmas for individuals and society. Despite the growing attention being paid to biotechnology, a major unanswered question is who shall control the development and use of the powerful array of human genetic and reproductive innovations. Should the decisions be left to individual consumers and private industry or should they be made by the government or other social institutions? After briefly reviewing development in human genetics and reproduction and describing trends toward commercialization of them, this article discusses the dilemmas these trends raise for a democratic society. It argues for the urgent need to delineate societal goals and priorities for the future and for technology assessment as early as possible in the developmental process. The article concludes by presenting some examples of the social policy problems now emerging.  相似文献   
99.
100.
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