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   32906篇
  免费   403篇
  国内免费   1篇
管理学   4465篇
民族学   176篇
人才学   4篇
人口学   4370篇
丛书文集   100篇
教育普及   1篇
理论方法论   2556篇
综合类   707篇
社会学   14712篇
统计学   6219篇
  2023年   122篇
  2021年   158篇
  2020年   326篇
  2019年   432篇
  2018年   2108篇
  2017年   2359篇
  2016年   1575篇
  2015年   471篇
  2014年   583篇
  2013年   4071篇
  2012年   1075篇
  2011年   1682篇
  2010年   1516篇
  2009年   1179篇
  2008年   1286篇
  2007年   1451篇
  2006年   507篇
  2005年   730篇
  2004年   684篇
  2003年   656篇
  2002年   592篇
  2001年   605篇
  2000年   569篇
  1999年   543篇
  1998年   418篇
  1997年   343篇
  1996年   440篇
  1995年   332篇
  1994年   336篇
  1993年   332篇
  1992年   387篇
  1991年   384篇
  1990年   365篇
  1989年   322篇
  1988年   350篇
  1987年   329篇
  1986年   288篇
  1985年   345篇
  1984年   317篇
  1983年   312篇
  1982年   225篇
  1981年   196篇
  1980年   186篇
  1979年   229篇
  1978年   195篇
  1977年   160篇
  1976年   125篇
  1975年   144篇
  1974年   146篇
  1973年   114篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
221.
This paper extends the author's recent work on dynamically consistent consequentialist social norms for an unrestricted domain of decision trees with risk to trees in which the population is a variable consequence — i.e., endogenous. Given a form of ethical liberalism and ethical irrelevance of distant ancestors, classical utilitarianism is implied (provided also that a weak continuity condition is met). The repugnant conclusion that having many poor people may be desirable can be avoided by denying that individuals' interests extend to the circumstances of their birth. But it is better avoided by recognizing that potential parents have legitimate interests concerning the sizes of their families.That action is best, which procures the greatest happiness for the greatest numbers. Francis Hutchison (1725).An abiding interest in concepts of optimality for the choice of population has been stimulated by frequent discussions with Partha Dasgupta. This paper was presented at the seminar on Distributive Justice and Inequality at the Wissenschaftskolleg zu Berlin, May 1986. I am grateful to the audience for their helpful comments, especially Maurice Salles and Patrick Suppes, and especially to John Weymark for carefully reading and suggesting distinct improvements to the earlier version.  相似文献   
222.
The author discusses various social problems resulting from migration to and within the United States, including poverty, acculturation, education, housing, employment, social adjustment, and family difficulties. The potential impact of migrants on the U.S. society and economy is assessed, and government policy responses to their problems are considered. (SUMMARY IN FRE AND SPA)  相似文献   
223.
"Net undercount rates in the U.S. decennial census have been steadily declining over the last several censuses. Differential undercounts among race groups and geographic areas, however, appear to persist. In the following, we examine and compare several methodologies for providing small area estimates of census coverage by constructing artificial populations. Measures of performance are also introduced to assess the various small area estimates. Synthetic estimation in combination with regression modelling provide the best results over the methods considered. Sampling error effects are also simulated. The results form the basis for determining coverage evaluation survey small area estimates of the 1900 decennial census."  相似文献   
224.
The author examines the content and methodology of the 1989 Soviet census. Items to be included in the questionnaires for both the total population and the 25 percent sample survey are described. The author notes that questions on housing will be included for the first time. Other topics considered include reliability of data, confidentiality, and organization.  相似文献   
225.
"This article presents estimates of the size of emigration from Poland during the 1980s as well as projections concerning the migration patterns in the 1990s. The author anticipates a contraction of the volume of population outflow by some 50 percent: from about 100,000 to about 50,000 per year, on the average. These projections are based upon the examination of the role of a number of incentives and barriers to migration, including economic, demographic and political factors. In the final section, prospects concerning immigration to Poland are briefly discussed."  相似文献   
226.
A comparison of the Korean minorities in China and Japan   总被引:1,自引:0,他引:1  
"This article compares the Korean minorities in China and Japan in their differential levels of cultural autonomy and ethnic identity....In explaining the differential levels of ethnicity between the two Korean minority groups, this paper focuses on the basic differences in minority policy between the two countries; the difference in the context of migration; the existence or absence of a territorial base; and the differential levels of influence from Korea."  相似文献   
227.
Elective single mothers are adult, unmarried women who intentionally become mothers. This study utilized longitudinal data about 17 Caucasian, elective single mothers and their children to identify fathers' roles in these families, and to understand children's views of their fathers. These single mothers and their children resided for the first six years of the children's lives in father-absent households. By age six, most of the children had ghost fathers, whom they had never met or knew little about. The data suggest that the father often becomes a family secret, and that children may blame themselves for their fathers' absence.  相似文献   
228.
229.
230.
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