全文获取类型
收费全文 | 2640篇 |
免费 | 118篇 |
国内免费 | 1篇 |
专业分类
管理学 | 277篇 |
民族学 | 34篇 |
人口学 | 291篇 |
丛书文集 | 8篇 |
理论方法论 | 224篇 |
综合类 | 115篇 |
社会学 | 1280篇 |
统计学 | 530篇 |
出版年
2024年 | 3篇 |
2023年 | 38篇 |
2022年 | 34篇 |
2021年 | 43篇 |
2020年 | 115篇 |
2019年 | 107篇 |
2018年 | 216篇 |
2017年 | 236篇 |
2016年 | 185篇 |
2015年 | 111篇 |
2014年 | 133篇 |
2013年 | 458篇 |
2012年 | 232篇 |
2011年 | 111篇 |
2010年 | 89篇 |
2009年 | 84篇 |
2008年 | 77篇 |
2007年 | 60篇 |
2006年 | 51篇 |
2005年 | 45篇 |
2004年 | 37篇 |
2003年 | 52篇 |
2002年 | 49篇 |
2001年 | 31篇 |
2000年 | 20篇 |
1999年 | 15篇 |
1998年 | 8篇 |
1997年 | 9篇 |
1996年 | 9篇 |
1995年 | 9篇 |
1994年 | 11篇 |
1993年 | 5篇 |
1992年 | 7篇 |
1991年 | 7篇 |
1990年 | 7篇 |
1989年 | 10篇 |
1988年 | 8篇 |
1987年 | 4篇 |
1986年 | 5篇 |
1985年 | 5篇 |
1984年 | 2篇 |
1979年 | 2篇 |
1978年 | 2篇 |
1977年 | 2篇 |
1975年 | 3篇 |
1973年 | 3篇 |
1972年 | 1篇 |
1971年 | 2篇 |
1967年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有2759条查询结果,搜索用时 15 毫秒
1.
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
2.
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
3.
María del Carmen Méndez García 《Intercultural Education》2005,16(1):57-68
The sociocultural content of foreign language textbooks has become a concern of scholars and practitioners owing to the fact that the traditional emphasis on purely linguistic issues has been expanded to embrace a language in context approach. This paper studies the English‐speaking communities that are described in English language teaching textbooks marketed in Spain. It examines to what extent an international and/or intercultural approach is a constituent element in their design. 相似文献
4.
5.
Andrée Coulombe M.Ps. Robert Ladouceur Ph.D. Raymond Desharnais Ph.D. Jean Jobin Ph.D. 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》1992,8(3):235-244
This study investigated the relationship between the level of arousal (Heart Rate) and the number of erroneous perceptions among video poker players. Twelve regular and twelve occasional gamblers participated in a gambling session conducted in a natural environment. It was hypothesised that 1) a significant positive correlation would be observed between arousal and the number of erroneous verbalizations, 2) regular players would show a higher level of arousal than occasional players, and 3) they would emit more erroneous verbalizations. Results showed that hypotheses one and three were confirmed. Theoretical and practical implications of these results for the psychology of gambling are discussed.This study was supported by a grant from Loto-Québec. 相似文献
6.
7.
本文回顾了国内外学者对企业家和企业家精神的研究, 讨论了转型时期民营企业家的生成和企业的行为特点, 并基于企业家理论对政府提出了相关的宏观政策建议。 相似文献
8.
9.
王银娥 《西北大学学报(哲学社会科学版)》2002,32(1):139-142
一国的经济增长主要取决于技术进步、人力资本和制度创新等三个方面。技术进步是经济增长的驱动力 ,人力资本存量与质量是经济增长的关键 ,制度创新是经济增长的根源。此三者彼此密切关联、互动互进、共同推动经济增长 相似文献
10.
In this article, we contend that the field of psychology has largely failed to foreground the role of gender in its study of immigration. Here, we review studies that address gender and migration focusing on the experience of children and adolescents. We provide developmental perspectives on family relations, well‐being, identity formation, and educational outcomes, paying particular attention to the role of gender in these domains. We conclude with recommendations for future research, which include the need to consider whether, and if so, how, when, and why it makes a difference to be an immigrant, to be from a particular country, or to be female rather than male. We argue that it is important to consider socioeconomic characteristics; to consider resilience as well as pathology; and to work in interdisciplinary ways to deepen our understanding of the gendered migratory experience of immigrant origin youth. 相似文献