全文获取类型
收费全文 | 1949篇 |
免费 | 10篇 |
国内免费 | 4篇 |
专业分类
管理学 | 89篇 |
民族学 | 22篇 |
人口学 | 41篇 |
丛书文集 | 51篇 |
理论方法论 | 64篇 |
综合类 | 288篇 |
社会学 | 317篇 |
统计学 | 1091篇 |
出版年
2024年 | 5篇 |
2023年 | 45篇 |
2022年 | 10篇 |
2021年 | 27篇 |
2020年 | 48篇 |
2019年 | 72篇 |
2018年 | 149篇 |
2017年 | 237篇 |
2016年 | 96篇 |
2015年 | 80篇 |
2014年 | 81篇 |
2013年 | 545篇 |
2012年 | 188篇 |
2011年 | 44篇 |
2010年 | 37篇 |
2009年 | 36篇 |
2008年 | 30篇 |
2007年 | 30篇 |
2006年 | 36篇 |
2005年 | 41篇 |
2004年 | 24篇 |
2003年 | 36篇 |
2002年 | 27篇 |
2001年 | 17篇 |
2000年 | 12篇 |
1999年 | 5篇 |
1997年 | 2篇 |
1983年 | 1篇 |
1981年 | 1篇 |
1980年 | 1篇 |
排序方式: 共有1963条查询结果,搜索用时 31 毫秒
111.
《Journal of Policy Modeling》2020,42(2):328-348
The paper investigates whether Southern Mediterranean and Middle Eastern markets under the Euro–Mediterranean Partnership (Egypt, Lebanon, Morocco, Malta, and Turkey) have become more financially integrated with the European stock market over time. The findings suggest that the Turkish equity market is moderately integrated with the European market, while the other economies exhibit weak financial integration with Europe, supporting the idea that the partnership appears to have no effect on enhancing inter-market linkages for these economies. Therefore, these markets would be good destinations for international investors seeking attractive investment opportunities to diversify their equity portfolios. Structural changes in the cross-market integration do exist, which may be considered as a guide for international equity portfolio diversification over different subperiods. In addition, there is evidence of an increasing trend in conditional correlations for Egypt and Turkey, to varying degrees, over time, notably during the post global financial crisis of 2007–2008, thus revealing herding behavior during this period. Overall, investors should be wary of the variation of equity market integration over time before engaging in an investment at the level of portfolio management and diversification. Policymakers must be aware of the remoteness of the current achievements of the Euro–Mediterranean Partnership from the targets set in terms of financial development and economic growth. 相似文献
112.
113.
Hadi Alizadeh Noughabi 《Journal of Statistical Computation and Simulation》2019,89(10):1914-1934
We propose here a general statistic for the goodness of fit test of statistical distributions. The proposed statistic is constructed based on an estimate of Kullback–Leibler information. The proposed test is consistent and the limiting distribution of the test statistic is derived. Then, the established results are used to introduce goodness of fit tests for the normal, exponential, Laplace and Weibull distributions. A simulation study is carried out for examining the power of the proposed test and to compare it with those of some existing procedures. Finally, some illustrative examples are presented and analysed, and concluding comments are made. 相似文献
114.
An often-cited fact regarding mixing or mixture distributions is that their density functions are able to approximate the density function of any unknown distribution to arbitrary degrees of accuracy, provided that the mixing or mixture distribution is sufficiently complex. This fact is often not made concrete. We investigate and review theorems that provide approximation bounds for mixing distributions. Connections between the approximation bounds of mixing distributions and estimation bounds for the maximum likelihood estimator of finite mixtures of location-scale distributions are reviewed. 相似文献
115.
We develop an omnibus two-sample test for ranked-set sampling (RSS) data. The test statistic is the conditional probability of seeing the observed sequence of ranks in the combined sample, given the observed sequences within the separate samples. We compare the test to existing tests under perfect rankings, finding that it can outperform existing tests in terms of power, particularly when the set size is large. The test does not maintain its level under imperfect rankings. However, one can create a permutation version of the test that is comparable in power to the basic test under perfect rankings and also maintains its level under imperfect rankings. Both tests extend naturally to judgment post-stratification, unbalanced RSS, and even RSS with multiple set sizes. Interestingly, the tests have no simple random sampling analog. 相似文献
116.
Øystein Kravdal 《Population studies》2018,72(2):139-156
There is still considerable uncertainty about how reproductive factors affect child mortality. This study, based on Demographic and Health Survey data from 28 countries in sub-Saharan Africa, shows that mortality is highest for firstborn children with very young mothers. Other children with young mothers, or of high birth order, also experience high mortality. Net of maternal age and birth order, a short preceding birth interval is associated with above average mortality. These patterns change, however, if time-invariant unobserved mother-level characteristics of importance for both mortality and fertility are controlled for in a multilevel–multiprocess model. Most importantly, there are smaller advantages associated with longer birth intervals and being older at first birth. The implications of alternative reproductive ‘strategies’ are discussed, taking into account that if the mother is older at birth, the child will also be born in a later calendar year, when mortality may be lower. 相似文献
117.
Svitlana Krys 《Canadian Slavonic papers》2018,60(1-2):136-158
This article examines three novels by Ukrainian realist Ivan Franko (1856–1916): Dlia domashn'oho ohnyshcha (For the Home Hearth, 1892), Osnovy suspil'nosti (Pillars of Society, 1894), and Perekhresni stezhky (Fateful Crossroads, 1900). Previous scholars saw elements of crime fiction in these works, but the actual relationship between the two genres of crime fiction and realism has not been fully developed. By studying the conventions of crime fiction, along with its antecedent, the Gothic, and their influence on Franko, the author shows the make-up of the early Ukrainian crime fiction genre and points to its importance in understanding Franko’s vacillation between realist and modernist tendencies. As she argues, the scales of his vacillation are tipped toward modernism in its decadent form, an existential void that characterized fin de siècle Europe. Hence, Franko’s “ideal” or programmatic realism (defined by Franko as a literary style with a didactic tendency aimed at educating society), which he introduced under the appealing cover of crime and Gothic motifs, ultimately failed him. The author proposes that it is the creative modes (Gothic and crime fiction) that Franko chose for voicing his ideas about social reforms that led him, unsuspectingly, away from his programmatic goal and toward the decadent aspects of modernism. 相似文献
118.
Anthony J. Montgomery Efharis Panagopoulou Maria C.W. Peeters Wilmar B. Schaufeli 《Community, Work & Family》2009,12(4):455-471
Studies of work and family issues have used predominately between-subject cross-sectional designs. While some researchers have called for more longitudinal studies, others have suggested that a more strategic way forward for the field is the use of daily diary studies (Frone, Russell, & Cooper, 1992). This study explores different types of interference between work and non-work domains, using a diary study methodology. This study consisted of a two-week diary study among 12 Irish employees. Analysis involved a two-step procedure involving both content analysis and interpretative phenomenological analysis (IPA). Results indicated that while individuals reported strain-based and time-based interference, evidence was also found of interference concerning persistent and intrusive thoughts. Despite some limitations to the study, this paper demonstrates that diary studies represent an opportunity for researchers to explore work and non-work experiences in a sensitive and ecologically valid way. 相似文献
119.
Zawar Hussain Mashail M. Al-Sobhi Bander Al-Zahrani Housila P. Singh Tanveer A. Tarray 《Mathematical Population Studies》2016,23(4):205-221
Randomized response models deal with stigmatizing variables appearing in health surveys. Additive and subtractive scrambling in split sample and double response yield unbiased mean and sensitivity estimators of high precision. The split sample method is protective of privacy. The double response method is as protective only conditionally. To achieve the maximum efficiency, the scrambling variables must be similar to each other and the probability of obtaining a true response must be as large as possible. The randomized response procedures yield more efficient estimates of the average total number of classes missed by university students. 相似文献
120.
《Women and birth : journal of the Australian College of Midwives》2015,28(2):154-159
BackgroundTraditional and gestational surrogate mothers assist infertile couples by carrying their children. In 2005, a meta-analysis on surrogacy was conducted but no study had examined empathy and maternal–foetal attachment of surrogate mothers. Assessments of surrogate mothers show no sign of psychopathology, but one study showed differences on several MMPI-2 scales compared to a normative sample: surrogate mothers identified with stereotypically masculine traits such as assertiveness and competition. They had a higher self-esteem and lower levels of anxiety and depression.Research objectiveTo determine if there is a difference in empathy and maternal–foetal attachment of surrogate mothers compared to a comparison group of mothers.MethodsThree groups of European traditional and gestational surrogate mothers (n = 10), Anglo-Saxon traditional and gestational surrogate mothers (n = 34) and a European normative sample of mothers (n = 32) completed four published psychometric instruments: the Interpersonal Reactivity Index (empathy index), the Hospital Anxiety and Depressions Scale and the MC20, a social desirability scale. Pregnant surrogate mothers filled the Maternal Antenatal Attachment Scale (n = 11). Statistical non-parametric analyses of variance were conducted.FindingsDepending on cultural background, surrogate mothers present differences in terms of empathy, anxiety and depression, social desirability and quality of attachment to the foetus compared to a normative sample.ConclusionsEnvironment plays a role for traditional and gestational surrogacy. Surrogate mothers of both groups are less anxious and depressed than normative samples. Maternal–foetal attachment is strong with a slightly lower quality of attachment. Surrogate mother's empathy indexes are similar to normative samples, sometimes higher. 相似文献