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   19669篇
  免费   358篇
  国内免费   1篇
管理学   2816篇
民族学   72篇
人才学   1篇
人口学   1887篇
丛书文集   77篇
教育普及   2篇
理论方法论   1781篇
现状及发展   1篇
综合类   260篇
社会学   9532篇
统计学   3599篇
  2021年   117篇
  2020年   284篇
  2019年   389篇
  2018年   451篇
  2017年   612篇
  2016年   489篇
  2015年   363篇
  2014年   477篇
  2013年   3047篇
  2012年   647篇
  2011年   630篇
  2010年   452篇
  2009年   378篇
  2008年   451篇
  2007年   471篇
  2006年   468篇
  2005年   448篇
  2004年   417篇
  2003年   381篇
  2002年   429篇
  2001年   526篇
  2000年   544篇
  1999年   471篇
  1998年   344篇
  1997年   318篇
  1996年   329篇
  1995年   311篇
  1994年   284篇
  1993年   289篇
  1992年   346篇
  1991年   322篇
  1990年   288篇
  1989年   294篇
  1988年   291篇
  1987年   252篇
  1986年   246篇
  1985年   283篇
  1984年   270篇
  1983年   253篇
  1982年   221篇
  1981年   185篇
  1980年   168篇
  1979年   198篇
  1978年   178篇
  1977年   162篇
  1976年   135篇
  1975年   159篇
  1974年   118篇
  1973年   116篇
  1972年   94篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
251.
252.
253.
254.
CONTEXT EFFECTS FOR CENSUS MEASURES OF RACE AND HISPANIC ORIGIN   总被引:1,自引:0,他引:1  
This paper reports on the results of a split-ballot experimentconducted in 1987 to test alternative versions of the decennialcensus long form. Two forms were randomly assigned and self-administeredin group sessions involving a total of 515 respondents. Theorder of race and Hispanic origin items was experimentally manipulated.The standard long form asks race, then Hispanic origin. Theexperimental form reversed the order of the items in order toreduce perceived redundancy, and to create a more restrictedframe of reference for the race item. The objectives of thecontext manipulation were (1) to reduce item nonresponse forthe Hispanic origin item, and (2) to reduce reporting of "Otherrace" by Hispanics in the race item. Objective (1) was met.Objective (2) was met for Hispanics born in a U.S. state, butnot for immigrants. The results are interpreted as reflectinga process of acculturation that affects how Hispanic respondentsapply U.S. racial categories "white" and "black" in the census.  相似文献   
255.
There has been a perceived increase in the number of medical negligence claims in recent years. The modern metropolitan medical examiner is increasingly called upon to deal with numerous medical, legal, social, and ethical issues. Nowhere is the role of the medical examiner more important than in the investigation of deaths related to surgical, diagnostic, anesthetic, or therapeutic procedures. Medical examiners have an important role in the investigative process. Through utilization of the offices and services of the medical examiner, questions raised by families, physicians, and other hospital employees may be satisfactorily answered a priori, and litigation may therefore be averted.  相似文献   
256.
Because hospitals and home health agencies have been predominantly separate organizations, coordination of their efforts has not been optimized. However, with the recent proliferation of hospital-based home health agencies, opportunities to integrate these health care service delivery systems have increased. Bethesda Memorial Hospital, Boynton Beach, Fla., is a 362-bed not-for-profit community hospital with a Medicare-certified home health agency organized as a department of the hospital. Until recently, the home health agency was generally perceived as a separate entity whose services were distinct from hospital services. Progress toward integration of hospital and home care services was given impetus through collaboration of the home health agency administrator and a newly appointed director of medical affairs who was given the responsibility as medical director of the home health agency. A prime responsibility of the director of medical affairs was to reduce length of stay and hospital costs through appropriate resource management.  相似文献   
257.
Among the controversies surrounding the provision of health care in a managed care environment is the belief that patients, because they have no particular allegiance to a single physician, are more casual in regard to their keeping appointments. To test this proposition, the authors conducted a study at a California independent practice association, comparing the habits of managed care patients with those of other types of patients. The findings, although based on a limited sample, suggest that managed care patients do indeed have a greater tendency to be appointment no-shows.  相似文献   
258.
259.
How our current system works and what changes need to be made are the subjects of intense scrutiny by policy makers today. One of the primary areas of concern with our present health care system is its accessibility to the average American, in terms of both price and ability to obtain insurance. With an estimated 37 million Americans without health care insurance, and countless others severely underinsured, this issue will lie at the core of any health care reform that results from the current debate. One possible approach to the uninsured problem that might alleviate the situation is community rating.  相似文献   
260.
Several countries have attempted to change human fertility through economic incentives. This paper presents simple mathematical models of the participation of couples in a locally funded program of economic incentives. The models take as a springboard China's one-child program. Localities with low per capita incentives attract few couples to the program, while localities with high incentives attract many couples at first, but the value of the benefits is then watered down. The models show that participation in the program may persistently oscillate or may decay to a stationary level. Which behavior occurs is determined by whether there are decreasing, constant, or increasing returns in the rates of participation in response to successive equal increments in the incentive offered, and by the extent to which prospective parents learn from experience with past oscillations in the incentives. The models raise many empirical questions about the dynamics of incentive programs.  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