全文获取类型
收费全文 | 15067篇 |
免费 | 217篇 |
国内免费 | 1篇 |
专业分类
管理学 | 2190篇 |
民族学 | 71篇 |
人口学 | 1365篇 |
丛书文集 | 47篇 |
理论方法论 | 1206篇 |
综合类 | 172篇 |
社会学 | 6411篇 |
统计学 | 3823篇 |
出版年
2023年 | 80篇 |
2021年 | 86篇 |
2020年 | 214篇 |
2019年 | 313篇 |
2018年 | 393篇 |
2017年 | 529篇 |
2016年 | 373篇 |
2015年 | 253篇 |
2014年 | 380篇 |
2013年 | 2673篇 |
2012年 | 472篇 |
2011年 | 459篇 |
2010年 | 340篇 |
2009年 | 343篇 |
2008年 | 330篇 |
2007年 | 352篇 |
2006年 | 340篇 |
2005年 | 329篇 |
2004年 | 289篇 |
2003年 | 272篇 |
2002年 | 300篇 |
2001年 | 389篇 |
2000年 | 372篇 |
1999年 | 345篇 |
1998年 | 251篇 |
1997年 | 236篇 |
1996年 | 219篇 |
1995年 | 192篇 |
1994年 | 235篇 |
1993年 | 190篇 |
1992年 | 259篇 |
1991年 | 240篇 |
1990年 | 218篇 |
1989年 | 204篇 |
1988年 | 175篇 |
1987年 | 172篇 |
1986年 | 178篇 |
1985年 | 183篇 |
1984年 | 198篇 |
1983年 | 184篇 |
1982年 | 163篇 |
1981年 | 129篇 |
1980年 | 139篇 |
1979年 | 152篇 |
1978年 | 133篇 |
1977年 | 126篇 |
1976年 | 101篇 |
1975年 | 112篇 |
1974年 | 94篇 |
1973年 | 80篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
Consider a website and the surfers visiting its pages. A typical issue of interest, for example while monitoring an advertising campaign, concerns whether a specific page has been designed successfully, i.e. is able to attract surfers or address them to other pages within the site. We assume that the surfing behaviour is fully described by the transition probabilities from one page to another, so that a clickstream (sequence of consecutively visited pages) can be viewed as a finite-state-space Markov chain. We then implement a variety of hierarchical prior distributions on the multivariate logits of the transition probabilities and define, for each page, a content effect and a link effect. The former measures the attractiveness of the page due to its contents, while the latter signals its ability to suggest further interesting links within the site. Moreover, we define an additional effect, representing overall page success, which incorporates both effects previously described. Using WinBUGS, we provide estimates and credible intervals for each of the above effects and rank pages accordingly. 相似文献
72.
Minorities and females are underrepresented in the top-income quintile of law school graduates. Employing a binary logistic
regression model, I examine whether this is due to a“glass ceiling” (an invisible barrier erected by third parties) or a“sticky
floor” (self-imposed limitations regarding employment). My major finding is that being female, a minority, or disabled did
not significantly reduce one's probability of making the top-income quintile once hours of work, experience, and other factors
are taken into account. My findings directly contradict the large body of glass-ceiling literature and support the sticky-floor
model.
I thank the Law School Admission Council for funding this research. Helpful comments and suggestions were received from Robert
Nelson of Northwestern University and the American Bar Foundation, Steven Conroy of the University of West Florida, and R.
Kim Craft and Douglas Bonzo of Southern Utah University. The views expressed here are solely those of the author and do not
necessarily reflect those of the institutions or persons listed above. 相似文献
73.
This paper is concerned with joint tests of non-nested models and simultaneous departures from homoskedasticity, serial independence and normality of the disturbance terms. Locally equivalent alternative models are used to construct joint tests since they provide a convenient way to incorporate more than one type of departure from the classical conditions. The joint tests represent a simple asymptotic solution to the “pre-testing” problem in the context of non-nested linear regression models. Our simulation results indicate that the proposed tests have good finite sample properties. 相似文献
74.
CORPORATE TAX INCIDENCE AND INEFFICIENCY WHEN CORPORATE AND NONCORPORATE GOODS ARE CLOSE SUBSTITUTES
An important deficiency in Harberger's [1962] model of corporate income taxation is its inability to consider both corporate and noncorporate production of the same good. Within-industry substitution has potentially major implications for both the excess burden and incidence of the corporate tax.
We analyze this within-industry substitution using a model in which each industry/sector contains corporate and noncorporate firms (with identical production functions) which produce goods that are close substitutes. The scope for considerable within-industry substitution of noncorporate for corporate capital leads to a very much larger excess burden than that in the Harberger model. 相似文献
We analyze this within-industry substitution using a model in which each industry/sector contains corporate and noncorporate firms (with identical production functions) which produce goods that are close substitutes. The scope for considerable within-industry substitution of noncorporate for corporate capital leads to a very much larger excess burden than that in the Harberger model. 相似文献
75.
Squared residual autocorrelations have been found useful in detecting departures from linearity in time series models. This is especially the case with data exhibiting heterogeneity in variances. A rank test is proposed which is much more robust than its parametric counterpart. 相似文献
76.
77.
A sample of 16 women and men who accompanied their adopted children with severe developmental disabilities to a medical appointment at Henry Ford Hospital's Multidisciplinary Care Clinic during the one-year period beginning July 1, 1988 are described in the context of their parental role vis-a-vis these children. Results of the study are presented through use of a six-part organizational scheme: demographic and social traits of the parents and their adopted children, the adopted children in family context, life satisfactions of the parents, adoption motives, adoption satisfactions, and humanization of the children. 相似文献
78.
Approximations of the Bayesian estimators of the survival function based on the censored data of the log-logistic distribution are obtained under squared-error and log-odds squared-error loss functions. A numerical example is presented. Through a Monte Carlo simulation study, the behavior of the approximations found by Tierney & Kadane and Lindley are compared with a method suggested by Weiss & Howlader. 相似文献
79.
The effects of question order on respondents' ratings of general and specific aspects of community life were assessed using data from separate mail surveys in Montana and Pennsylvania, The samples differed in locale, composition, and size and the relevant questions varied in number, format, and specific focus. Nevertheless, for both data sets the general question was more likely to be answered and more likely to receive positive responses when it was asked after—rather than before—the specific questions. There was some indication that carryover from the specific items to the general question responses were somewhat greater for those questions asked most recently and less for those asked earlier. Implications of these findings are discussed. 相似文献
80.