全文获取类型
收费全文 | 3294篇 |
免费 | 123篇 |
专业分类
管理学 | 500篇 |
民族学 | 20篇 |
人口学 | 244篇 |
丛书文集 | 16篇 |
理论方法论 | 417篇 |
综合类 | 31篇 |
社会学 | 1670篇 |
统计学 | 519篇 |
出版年
2023年 | 21篇 |
2022年 | 15篇 |
2021年 | 27篇 |
2020年 | 87篇 |
2019年 | 127篇 |
2018年 | 123篇 |
2017年 | 142篇 |
2016年 | 105篇 |
2015年 | 91篇 |
2014年 | 134篇 |
2013年 | 564篇 |
2012年 | 126篇 |
2011年 | 120篇 |
2010年 | 121篇 |
2009年 | 84篇 |
2008年 | 105篇 |
2007年 | 109篇 |
2006年 | 107篇 |
2005年 | 99篇 |
2004年 | 91篇 |
2003年 | 77篇 |
2002年 | 87篇 |
2001年 | 76篇 |
2000年 | 57篇 |
1999年 | 68篇 |
1998年 | 50篇 |
1997年 | 59篇 |
1996年 | 31篇 |
1995年 | 37篇 |
1994年 | 38篇 |
1993年 | 26篇 |
1992年 | 20篇 |
1991年 | 29篇 |
1990年 | 24篇 |
1989年 | 21篇 |
1988年 | 32篇 |
1987年 | 23篇 |
1986年 | 22篇 |
1985年 | 23篇 |
1984年 | 27篇 |
1983年 | 22篇 |
1982年 | 14篇 |
1981年 | 29篇 |
1980年 | 23篇 |
1979年 | 17篇 |
1978年 | 18篇 |
1977年 | 11篇 |
1976年 | 13篇 |
1975年 | 12篇 |
1974年 | 9篇 |
排序方式: 共有3417条查询结果,搜索用时 31 毫秒
1.
Stephen J. Ruberg Frank E. Harrell Jr. Margaret Gamalo-Siebers Lisa LaVange J. Jack Lee Karen Price 《The American statistician》2019,73(1):319-327
ABSTRACTThe cost and time of pharmaceutical drug development continue to grow at rates that many say are unsustainable. These trends have enormous impact on what treatments get to patients, when they get them and how they are used. The statistical framework for supporting decisions in regulated clinical development of new medicines has followed a traditional path of frequentist methodology. Trials using hypothesis tests of “no treatment effect” are done routinely, and the p-value < 0.05 is often the determinant of what constitutes a “successful” trial. Many drugs fail in clinical development, adding to the cost of new medicines, and some evidence points blame at the deficiencies of the frequentist paradigm. An unknown number effective medicines may have been abandoned because trials were declared “unsuccessful” due to a p-value exceeding 0.05. Recently, the Bayesian paradigm has shown utility in the clinical drug development process for its probability-based inference. We argue for a Bayesian approach that employs data from other trials as a “prior” for Phase 3 trials so that synthesized evidence across trials can be utilized to compute probability statements that are valuable for understanding the magnitude of treatment effect. Such a Bayesian paradigm provides a promising framework for improving statistical inference and regulatory decision making. 相似文献
2.
Journal of Nonverbal Behavior - Age-related deficits are often observed in emotion categorization tasks that include negative emotional expressions like anger, fear, and sadness. Stimulus... 相似文献
3.
Witkower Zachary Tracy Jessica L. Pun Anthea Baron Andrew S. 《Journal of Nonverbal Behavior》2021,45(4):505-518
Journal of Nonverbal Behavior - Past research has demonstrated that children understand distinct emotion concepts and can accurately recognize facial expressions of distinct emotions by a young... 相似文献
4.
This paper considers whether gains made by shareholders from corporate takeovers are achieved at the expense of employees, as proposed by the ‘wealth transfer’ perspective. It analyses the contribution of employee lay‐offs, along with employment and wage changes, to the takeover premium and abnormal share price movements. The analysis draws on a unique dataset of British takeovers, combining documentary, share price and accounting data. The results show that lay‐offs planned at the takeover have either no effect or adverse effects on shareholder returns. Wages growth is positively, not inversely, related to shareholder returns from the second year after the takeover, whilst positive employment changes have a similar effect in the following year. Closer scrutiny indicates that labour and shareholders share gains when the firm does well, but share pain when it does not. There is evidence, therefore, that labour and shareholder interests can be complementary, rather than antagonistic, after takeovers. 相似文献
5.
Multi-valued strategy-proof social choice rules 总被引:10,自引:4,他引:6
In this paper we introduce a new definition of strategy-proofness for multi-valued social choice correspondences. We prove
two Gibbard-Satterthwaite type results for strategy-proof social choice correspondences. These results show that allowing
multiple outcomes as social choices will not necessarily lead to an escape from the Gibbard-Satterthwaite impossibility theorem.
Received: 24 January 2001/Accepted: 19 March 2001 相似文献
6.
7.
Professor Stephen Senn Dr Dipti Amin Professor Rosemary A. Bailey Professor Sheila M. Bird FFPH Dr Barbara Bogacka Mr Peter Colman Dr rew Garrett Professor rew Grieve Professor Sir Peter Lachmann FRS FMedSci 《Journal of the Royal Statistical Society. Series A, (Statistics in Society)》2007,170(3):517-579
8.
9.
10.
Stephen Walker 《Statistics and Computing》1995,5(4):311-315
Laud et al. (1993) describe a method for random variate generation from D-distributions. In this paper an alternative method using substitution sampling is given. An algorithm for the random variate generation from SD-distributions is also given. 相似文献