全文获取类型
收费全文 | 1788篇 |
免费 | 81篇 |
专业分类
管理学 | 220篇 |
民族学 | 25篇 |
人才学 | 1篇 |
人口学 | 226篇 |
丛书文集 | 3篇 |
理论方法论 | 181篇 |
综合类 | 33篇 |
社会学 | 767篇 |
统计学 | 413篇 |
出版年
2024年 | 5篇 |
2023年 | 23篇 |
2022年 | 29篇 |
2021年 | 49篇 |
2020年 | 75篇 |
2019年 | 116篇 |
2018年 | 151篇 |
2017年 | 158篇 |
2016年 | 116篇 |
2015年 | 63篇 |
2014年 | 106篇 |
2013年 | 301篇 |
2012年 | 102篇 |
2011年 | 63篇 |
2010年 | 63篇 |
2009年 | 56篇 |
2008年 | 47篇 |
2007年 | 39篇 |
2006年 | 41篇 |
2005年 | 34篇 |
2004年 | 31篇 |
2003年 | 18篇 |
2002年 | 23篇 |
2001年 | 19篇 |
2000年 | 12篇 |
1999年 | 10篇 |
1998年 | 17篇 |
1997年 | 11篇 |
1996年 | 16篇 |
1995年 | 12篇 |
1994年 | 6篇 |
1993年 | 2篇 |
1992年 | 9篇 |
1991年 | 3篇 |
1990年 | 3篇 |
1989年 | 4篇 |
1988年 | 3篇 |
1987年 | 4篇 |
1986年 | 3篇 |
1985年 | 3篇 |
1984年 | 3篇 |
1983年 | 3篇 |
1982年 | 2篇 |
1978年 | 2篇 |
1975年 | 2篇 |
1973年 | 1篇 |
1971年 | 2篇 |
1969年 | 1篇 |
1968年 | 2篇 |
1964年 | 1篇 |
排序方式: 共有1869条查询结果,搜索用时 781 毫秒
1.
It is uncertain whether Latin America and Caribbean (LAC) countries are approaching a single mortality regime. Over the last three decades, LAC has experienced major public health interventions and the highest number of homicides in the world. However, these interventions and homicide rates are not evenly shared across countries. This study documents trends in life expectancy and lifespan variability for 20 LAC countries, 2000–14. By extending a previous method, we decompose differences in lifespan variability between LAC and a developed world benchmark into cause-specific effects. For both sexes, dispersion of amenable diseases through the age span makes the largest contribution to the gap between LAC and the benchmark. Additionally, for males, the concentration of homicides, accidents, and suicides in mid-life further impedes mortality convergence. Great disparity exists in the region: while some countries are rapidly approaching the developed regime, others remain far behind and suffer a clear disadvantage in population health. 相似文献
2.
3.
Existence and Nash implementation of efficient sharing rules for a commonly owned technology 总被引:2,自引:0,他引:2
Suppose that a group of individuals owns collectively a technology which produces a consumption good by means of a (possibly
heterogeneous) input. A sharing rule associates input contributions with a vector of consumptions that are technologically
feasible. We show that the set of allocations obtained by any continuous sharing rule contains Pareto efficient allocations.
We also present a mechanism that implements in Nash equilibrium the Pareto efficient allocations contained in an arbitrary
sharing rule.
Received: 29 June 1998/Accepted: 15 November 2000 相似文献
4.
5.
Jon M. Patterson 《Journal of marriage and the family》2002,64(2):349-360
The construct, family resilience, has been defined and applied very differently by those who are primarily clinical practitioners and those who are primarily researchers in the family field. In thisarticle, the family resilience perspective is integrated with conceptual definitions from family stress theory using the Family Adjustment and Adaptation Response (FAAR) Model in an effort to clarify distinctions between family resiliency as capacity and family resilience as a process. The family resilience process is discussed in terms of (a) the meaning of significant risk exposure (vs. the normal challenges of family life) and (b) the importance of making conceptual and operational distinctions between family system outcomes and family protective processes. Recommendations for future family resilience research are discussed. 相似文献
6.
7.
8.
9.
10.
In event time data analysis, comparisons between distributions are made by the logrank test. When the data appear to contain crossing hazards phenomena, nonparametric weighted logrank statistics are usually suggested to accommodate different-weighted functions to increase the power. However, the gain in power by imposing different weights has its limits since differences before and after the crossing point may balance each other out. In contrast to the weighted logrank tests, we propose a score-type statistic based on the semiparametric-, heteroscedastic-hazards regression model of Hsieh [2001. On heteroscedastic hazards regression models: theory and application. J. Roy. Statist. Soc. Ser. B 63, 63–79.], by which the nonproportionality is explicitly modeled. Our score test is based on estimating functions derived from partial likelihood under the heteroscedastic model considered herein. Simulation results show the benefit of modeling the heteroscedasticity and power of the proposed test to two classes of weighted logrank tests (including Fleming–Harrington's test and Moreau's locally most powerful test), a Renyi-type test, and the Breslow's test for acceleration. We also demonstrate the application of this test by analyzing actual data in clinical trials. 相似文献