全文获取类型
收费全文 | 4783篇 |
免费 | 190篇 |
专业分类
管理学 | 705篇 |
民族学 | 33篇 |
人才学 | 1篇 |
人口学 | 442篇 |
丛书文集 | 38篇 |
理论方法论 | 503篇 |
综合类 | 42篇 |
社会学 | 2588篇 |
统计学 | 621篇 |
出版年
2023年 | 31篇 |
2022年 | 23篇 |
2021年 | 40篇 |
2020年 | 93篇 |
2019年 | 124篇 |
2018年 | 148篇 |
2017年 | 203篇 |
2016年 | 178篇 |
2015年 | 123篇 |
2014年 | 141篇 |
2013年 | 764篇 |
2012年 | 187篇 |
2011年 | 180篇 |
2010年 | 120篇 |
2009年 | 144篇 |
2008年 | 144篇 |
2007年 | 127篇 |
2006年 | 136篇 |
2005年 | 136篇 |
2004年 | 144篇 |
2003年 | 127篇 |
2002年 | 131篇 |
2001年 | 126篇 |
2000年 | 108篇 |
1999年 | 85篇 |
1998年 | 70篇 |
1997年 | 64篇 |
1996年 | 80篇 |
1995年 | 57篇 |
1994年 | 58篇 |
1993年 | 73篇 |
1992年 | 63篇 |
1991年 | 65篇 |
1990年 | 54篇 |
1989年 | 37篇 |
1988年 | 41篇 |
1987年 | 36篇 |
1986年 | 36篇 |
1985年 | 48篇 |
1984年 | 52篇 |
1983年 | 38篇 |
1982年 | 46篇 |
1981年 | 28篇 |
1980年 | 36篇 |
1979年 | 33篇 |
1978年 | 21篇 |
1977年 | 33篇 |
1976年 | 22篇 |
1975年 | 24篇 |
1974年 | 26篇 |
排序方式: 共有4973条查询结果,搜索用时 15 毫秒
981.
Jörg Drechsler Agnes Dundler Stefan Bender Susanne Rässler Thomas Zwick 《AStA Advances in Statistical Analysis》2008,92(4):439-458
For micro-datasets considered for release as scientific or public use files, statistical agencies have to face the dilemma of guaranteeing the confidentiality of survey respondents on the one hand and offering sufficiently detailed data on the other hand. For that reason, a variety of methods to guarantee disclosure control is discussed in the literature. In this paper, we present an application of Rubin’s (J. Off. Stat. 9, 462–468, 1993) idea to generate synthetic datasets from existing confidential survey data for public release.We use a set of variables from the 1997 wave of the German IAB Establishment Panel and evaluate the quality of the approach by comparing results from an analysis by Zwick (Ger. Econ. Rev. 6(2), 155–184, 2005) with the original data with the results we achieve for the same analysis run on the dataset after the imputation procedure. The comparison shows that valid inferences can be obtained using the synthetic datasets in this context, while confidentiality is guaranteed for the survey participants. 相似文献
982.
This article provides an introduction to research on European prejudice and discrimination. First, we list the distinctive characteristics of a European perspective and provide a short sketch of European immigration and ethnic groups. Europe has become a multicultural community. Nevertheless, public opinion and the continent's politics often do not reflect this empirical fact. Prejudice and discrimination directed at immigrants are a widespread phenomena across Europe. Several cross-European surveys support this conclusion, although theoretically driven surveys on prejudice and discrimination in Europe remain rare. Cross-European research studies classical and modern theories of prejudice and discrimination and attempts to uncover the psychological mechanisms that explain individual readiness to exclude ethnic groups. A brief sketch of recent European research is presented. This issue offers both important cross-national perspectives as well as needed comparisons with the more studied case of racial prejudice and discrimination in the United States. 相似文献
983.
Thomas F. Pettigrew Oliver Christ Ulrich Wagner Roel W. Meertens Rolf van Dick reas Zick 《The Journal of social issues》2008,64(2):385-401
Using three diverse European surveys, we test the relationship between relative deprivation (RD) and anti-immigrant prejudice. We find that both group relative deprivation (GRD) and individual relative deprivation (IRD) are found primarily among working-class respondents who are politically alienated. We also find that GRD, but not IRD, serves as a proximal correlate of prejudice. IRD's effects on prejudice are largely mediated through GRD. In addition, GRD partially mediates the effects of such distal predictors of prejudice as education and family income. Finally, blaming the victim mediates in part the GRD link with prejudice. These results lead to a socially situated path model of RD's effects on prejudice with public policy implications. 相似文献
984.
985.
986.
In standard auctions resale creates a role for a speculator—a bidder who is commonly known to have no use value for the good on sale. We study this issue in environments with symmetric independent private‐value bidders. For second‐price and English auctions the efficient value‐bidding equilibrium coexists with a continuum of inefficient equilibria in which the speculator wins the auction and makes positive profits. First‐price and Dutch auctions have an essentially unique equilibrium, and whether or not the speculator wins the auction and distorts the final allocation depends on the number of bidders, the value distribution, and the discount factor. Speculators do not make profits in first‐price or Dutch auctions. 相似文献
987.
Enriqueta Aragons Andrew Postlewaite Thomas Palfrey 《Journal of the European Economic Association》2007,5(4):846-884
We analyze conditions under which candidates' reputations may affect voters' beliefs over what policy will be implemented by the winning candidate of an election. We develop a model of repeated elections with complete information in which candidates are purely ideological. We analyze an equilibrium in which voters' strategies involve a credible threat to punish candidates who renege on their campaign promises and in which all campaign promises are believed by voters and honored by candidates. We characterize the maximal credible campaign promises and find that the degree to which promises are credible in equilibrium is an increasing function of the value of a candidate's reputation. (JEL: D8) 相似文献
988.
We study the benefit obtained by exploiting modular product design in fulfilling exogenous demand for both a complete assembly and its components in a service parts inventory system. Our goal is to reduce overall service system costs by allowing assembly and/or disassembly (A/D) to occur at some unit cost per A/D action. In an extensive set of computational experiments, we compare a naïve stocking and operating policy that treats all items independently and ignores the modular product structure and related A/D capability to the optimal base stock policy, and to a policy that allows A/D from the naïve stocking levels. While extensive computational analysis shows that the optimal base stock policy improves the system cost between 3 to 26% over the naïve approach, simply allowing A/D from the naïve stocking levels captures a significant portion (an average of 67%) of the naïve–optimal gap. Our computational results demonstrate that the optimization shifts the component‐assembly mix from the naïve levels and that limiting A/D capacity affects this mix. Limiting A/D capacity can actually increase the expected number of A/D actions (versus the uncapacitated case), since the optimization shifts stocking levels to reduce the probability that “too many” actions will be required. 相似文献
989.
Thomas DC 《Lifetime data analysis》2007,13(4):565-581
I consider the design of multistage sampling schemes for epidemiologic studies involving latent variable models, with surrogate
measurements of the latent variables on a subset of subjects. Such models arise in various situations: when detailed exposure
measurements are combined with variables that can be used to assign exposures to unmeasured subjects; when biomarkers are
obtained to assess an unobserved pathophysiologic process; or when additional information is to be obtained on confounding
or modifying variables. In such situations, it may be possible to stratify the subsample on data available for all subjects
in the main study, such as outcomes, exposure predictors, or geographic locations. Three circumstances where analytic calculations
of the optimal design are possible are considered: (i) when all variables are binary; (ii) when all are normally distributed;
and (iii) when the latent variable and its measurement are normally distributed, but the outcome is binary. In each of these
cases, it is often possible to considerably improve the cost efficiency of the design by appropriate selection of the sampling
fractions. More complex situations arise when the data are spatially distributed: the spatial correlation can be exploited
to improve exposure assignment for unmeasured locations using available measurements on neighboring locations; some approaches
for informative selection of the measurement sample using location and/or exposure predictor data are considered. 相似文献
990.
近一个世纪来,管理理论和组织学研究促进了一系列根本性改变的表述,使得管理者们在其职业生涯中必须大量地学习、学习、再学习。人们会认为,在大学商学院里,应该是组织学研究者们而不是其他领域的专家,引导着适应变化环境的新范式的发展。然而,本文将指出组织学范式的研究与经营实践迄今为止基本上是相互分离的。本文还将详细说明,尽管存在着这种分离,经营范式文献对组织学研究和引导它的理论范式还是产生了相当大的影响,特别是在这个“实用知识”越来越受重视的年代。 相似文献