全文获取类型
收费全文 | 5442篇 |
免费 | 267篇 |
专业分类
管理学 | 722篇 |
民族学 | 58篇 |
人才学 | 1篇 |
人口学 | 547篇 |
丛书文集 | 29篇 |
理论方法论 | 511篇 |
综合类 | 91篇 |
社会学 | 2815篇 |
统计学 | 935篇 |
出版年
2023年 | 61篇 |
2022年 | 50篇 |
2021年 | 72篇 |
2020年 | 183篇 |
2019年 | 177篇 |
2018年 | 292篇 |
2017年 | 356篇 |
2016年 | 294篇 |
2015年 | 185篇 |
2014年 | 219篇 |
2013年 | 902篇 |
2012年 | 336篇 |
2011年 | 211篇 |
2010年 | 156篇 |
2009年 | 169篇 |
2008年 | 167篇 |
2007年 | 135篇 |
2006年 | 131篇 |
2005年 | 140篇 |
2004年 | 132篇 |
2003年 | 128篇 |
2002年 | 115篇 |
2001年 | 109篇 |
2000年 | 85篇 |
1999年 | 62篇 |
1998年 | 44篇 |
1997年 | 42篇 |
1996年 | 54篇 |
1995年 | 43篇 |
1994年 | 43篇 |
1993年 | 56篇 |
1992年 | 46篇 |
1991年 | 42篇 |
1990年 | 33篇 |
1989年 | 30篇 |
1988年 | 31篇 |
1987年 | 28篇 |
1986年 | 28篇 |
1985年 | 26篇 |
1984年 | 34篇 |
1983年 | 24篇 |
1982年 | 29篇 |
1981年 | 20篇 |
1980年 | 21篇 |
1979年 | 22篇 |
1978年 | 15篇 |
1977年 | 24篇 |
1975年 | 23篇 |
1974年 | 20篇 |
1973年 | 13篇 |
排序方式: 共有5709条查询结果,搜索用时 15 毫秒
1.
2.
Generally, the semiclosed-form option pricing formula for complex financial models depends on unobservable factors such as stochastic volatility and jump intensity. A popular practice is to use an estimate of these latent factors to compute the option price. However, in many situations this plug-and-play approximation does not yield the appropriate price. This article examines this bias and quantifies its impacts. We decompose the bias into terms that are related to the bias on the unobservable factors and to the precision of their point estimators. The approximated price is found to be highly biased when only the history of the stock price is used to recover the latent states. This bias is corrected when option prices are added to the sample used to recover the states' best estimate. We also show numerically that such a bias is propagated on calibrated parameters, leading to erroneous values. The Canadian Journal of Statistics 48: 8–35; 2020 © 2019 Statistical Society of Canada 相似文献
3.
Archila Bustos Maria Francisca Hall Ola Niedomysl Thomas Ernstson Ulf 《Population and environment》2020,42(2):255-277
Population and Environment - Human activity is a major driver of change and has contributed to many of the challenges we face today. Detailed information about human population distribution is... 相似文献
4.
Aging in the Era of Regenerative Medicine: Analysis of Aging‐Related Representations among Canadian Researchers 下载免费PDF全文
Céline Lafontaine 《The Sociological quarterly》2015,56(1):62-79
Explicitly aimed at understanding and controlling molecular and cellular processes at the root of senescence and biological aging, regenerative medicine aspires to artificially reproduce the biological processes that enable the body to regenerate itself. This no longer involves conserving the body's state of balance by combating disease, as in clinical medicine, but rather fighting degeneration itself. From stem cell research to gene therapy to the production of replacement tissues, regenerative medicine perfectly corresponds to the logic of biomedicalization specific to postmodern society. Based on a series of 18 interviews conducted with Canadian researchers and clinicians in the field of regenerative medicine, this article seeks to understand representations of the aging body among researchers in this field. Seen from a strictly negative angle, aging is assimilated by researchers to an inevitable catastrophe that nevertheless must be combated. More closely observing the theoretical model of regenerative biology and the types of treatments developed, it can be observed, however, that this medicine of the future does not target the elderly, but rather promises youth the ability to regenerate themselves to avoid aging. 相似文献
5.
Journal of Population Research - This paper details efforts to link administrative records from the Internal Revenue Service (IRS) to American Community Survey (ACS) and 2010 Census microdata for... 相似文献
6.
Laurent Gardes Stéphane Girard Gilles Stupfler 《Scandinavian Journal of Statistics》2020,47(3):922-949
The conditional tail expectation (CTE) is an indicator of tail behavior that takes into account both the frequency and magnitude of a tail event. However, the asymptotic normality of its empirical estimator requires that the underlying distribution possess a finite variance; this can be a strong restriction in actuarial and financial applications. A valuable alternative is the median shortfall (MS), although it only gives information about the frequency of a tail event. We construct a class of tail Lp-medians encompassing the MS and CTE. For p in (1,2), a tail Lp-median depends on both the frequency and magnitude of tail events, and its empirical estimator is, within the range of the data, asymptotically normal under a condition weaker than a finite variance. We extrapolate this estimator and another technique to extreme levels using the heavy-tailed framework. The estimators are showcased on a simulation study and on real fire insurance data. 相似文献
7.
Thomas K. Kenemore 《Child and Adolescent Social Work Journal》2002,19(4):269-270
8.
Acculturative stress in the adjustment of immigrant families 总被引:1,自引:0,他引:1
Tania N. Thomas 《Journal of Social Distress and the Homeless》1995,4(2):131-142
This study reviews the issue of acculturative stress in immigrant families. Acculturative stress includes behaviors experienced by immigrants that are a direct consequence of the process of acculturation and adaptation to a new society. A number of stressors impacting on the acculturation of immigrant families is discussed. These stressors include lack of English language skills, employment and economic status, educational background, family life, and sociopolitical and immigration status. 相似文献
9.
10.