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   899篇
  免费   54篇
管理学   156篇
民族学   7篇
人口学   75篇
丛书文集   5篇
理论方法论   128篇
综合类   14篇
社会学   477篇
统计学   91篇
  2023年   9篇
  2022年   4篇
  2021年   9篇
  2020年   19篇
  2019年   27篇
  2018年   34篇
  2017年   50篇
  2016年   40篇
  2015年   23篇
  2014年   28篇
  2013年   121篇
  2012年   42篇
  2011年   43篇
  2010年   34篇
  2009年   28篇
  2008年   39篇
  2007年   36篇
  2006年   35篇
  2005年   27篇
  2004年   41篇
  2003年   30篇
  2002年   28篇
  2001年   20篇
  2000年   19篇
  1999年   11篇
  1998年   14篇
  1997年   12篇
  1996年   11篇
  1995年   4篇
  1994年   7篇
  1993年   9篇
  1992年   9篇
  1991年   8篇
  1990年   10篇
  1987年   7篇
  1986年   3篇
  1985年   6篇
  1984年   4篇
  1982年   9篇
  1981年   3篇
  1980年   5篇
  1979年   2篇
  1978年   6篇
  1977年   4篇
  1976年   3篇
  1975年   2篇
  1974年   3篇
  1973年   2篇
  1972年   2篇
  1971年   2篇
排序方式: 共有953条查询结果,搜索用时 15 毫秒
91.
92.
93.
This article develops a new methodology for a more comprehensive and useful analysis of the costs and benefits of fundraising, as well as the total costs and net benefits associated with development efforts in general. This approach does a better job of linking the timing of return of fundraising efforts and measuring the actual return on investments in fundraising (as opposed to the reported return) than the widely used guidelines from the Council for Advancement and Support of Education and the National Association of College and University Business Officers (CASE/NACUBO) (1990). The implications are a better methodology for practitioners that they can use to enhance internal decision making and a better methodology for boards to use in evaluating performance and accountability. Recently, other large, public universities have begun using several of these concepts in the assessment of their development offices (Rooney, 1998).  相似文献   
94.
Some studies generate data that can be grouped into clusters in more than one way. Consider for instance a smoking prevention study in which responses on smoking status are collected over several years in a cohort of students from a number of different schools. This yields longitudinal data, also cross‐sectionaliy clustered in schools. The authors present a model for analyzing binary data of this type, combining generalized estimating equations and estimation of random effects to address the longitudinal and cross‐sectional dependence, respectively. The estimation procedure for this model is discussed, as are the results of a simulation study used to investigate the properties of its estimates. An illustration using data from a smoking prevention trial is given.  相似文献   
95.
Jury theorems with multiple alternatives   总被引:1,自引:1,他引:0  
I consider a game in which imperfectly informed jurors vote to select one of several possible choices when there is a natural ordering of the possibilities. Each juror votes for the largest alternative the juror would like to implement, and the alternative that is selected is the largest alternative supported by a given number of jurors. For non-unanimous voting rules, the probability of a mistaken judgment goes to zero as the number of jurors goes to infinity. I also give necessary and sufficient conditions to obtain asymptotic efficiency under unanimous voting rules, and show that unanimous rules may lead to a bias in which moderate outcomes are never chosen.  相似文献   
96.
This article analyses the performance of cotton sectors across East, Southern, and West Africa, paying particular attention to the wide diversity of institutional arrangements that they now exhibit. It finds strong support for earlier contentions regarding trade‐offs between competition and coordination, and between the roles of public and private sectors. New insights provide concrete and context‐specific guidance to policy‐makers and stakeholders regarding the key challenges they will face and the risks they will need to manage as they work to improve productivity and ensure an equitable division of benefits within cotton sectors.  相似文献   
97.
98.
Research in the United States has shown that children growing up in 2‐parent households do better in school than children from single‐parent households. We used the Trends in International Mathematics and Science Study (TIMSS) data to test whether this finding applied to other countries as well (N = 100,307). We found that it did, but that the educational gap was greater in the United States than in the other 13 countries considered. Results from 2‐level hierarchical linear models demonstrated that international differences in the educational gap were associated with several indicators of national policy and demographic contexts. No single policy appeared to have a large effect, but several policy combinations were associated with substantially reduced educational gaps between children from different family structures.  相似文献   
99.

This paper presents a critical review of the most frequently cited resurgence of ethnicity studies. Many of the sources cited in recently published ethnic relations books are found to lack an empirical base. They are essentially polemical, impressionistic and anecdotal works. Empirical studies that support the resurgence of ethnicity theme are also examined. Their shortcomings are noted. Nevertheless, these empirical studies provide convincing evidence that ethnic differences persist into the later generations. Overall, however, the empirical studies overwhelmingly document increasing assimilation. Virtually no evidence is found for the notion of a third generation resurgence.  相似文献   
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