全文获取类型
收费全文 | 12184篇 |
免费 | 220篇 |
国内免费 | 2篇 |
专业分类
管理学 | 1568篇 |
民族学 | 72篇 |
人才学 | 3篇 |
人口学 | 1099篇 |
丛书文集 | 74篇 |
理论方法论 | 1249篇 |
综合类 | 234篇 |
社会学 | 6451篇 |
统计学 | 1656篇 |
出版年
2021年 | 61篇 |
2020年 | 191篇 |
2019年 | 291篇 |
2018年 | 313篇 |
2017年 | 435篇 |
2016年 | 293篇 |
2015年 | 229篇 |
2014年 | 285篇 |
2013年 | 2037篇 |
2012年 | 397篇 |
2011年 | 389篇 |
2010年 | 303篇 |
2009年 | 293篇 |
2008年 | 296篇 |
2007年 | 335篇 |
2006年 | 311篇 |
2005年 | 313篇 |
2004年 | 309篇 |
2003年 | 209篇 |
2002年 | 253篇 |
2001年 | 307篇 |
2000年 | 243篇 |
1999年 | 232篇 |
1998年 | 186篇 |
1997年 | 177篇 |
1996年 | 165篇 |
1995年 | 154篇 |
1994年 | 163篇 |
1993年 | 163篇 |
1992年 | 160篇 |
1991年 | 169篇 |
1990年 | 168篇 |
1989年 | 164篇 |
1988年 | 145篇 |
1987年 | 163篇 |
1986年 | 123篇 |
1985年 | 158篇 |
1984年 | 165篇 |
1983年 | 157篇 |
1982年 | 130篇 |
1981年 | 99篇 |
1980年 | 119篇 |
1979年 | 116篇 |
1978年 | 111篇 |
1977年 | 89篇 |
1976年 | 95篇 |
1975年 | 102篇 |
1974年 | 96篇 |
1973年 | 74篇 |
1972年 | 64篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
John E. Roemer 《Social Choice and Welfare》1994,11(4):355-380
Voter preferences are characterized by a parameter s (say, income) distributed on a set S according to a probability measure F. There is a single issue (say, a tax rate) whose level, b, is to be politically decided. There are two parties, each of which is a perfect agent of some constituency of voters, voters with a given value of s. An equilibrium of the electoral game is a pair of policies, b 1 and b 2, proposed by the two parties, such that b i maximizes the expected utility of the voters whom party i represents, given the policy proposed by the opposition. Under reasonable assumptions, the unique electoral equilibrium consists in both parties proposing the favorite policy of the median voter. What theory can explain why, historically, we observe electoral equilibria where the ‘right’ and ‘left’ parties propose different policies? Uncertainty concerning the distribution of voters is introduced. Let {F(t)} t ε T be a class of probability measures on S; all voters and parties share a common prior that the distribution of t is described by a probability measure H on T. If H has finite support, there is in general no electoral equilibrium. However, if H is continuous, then electoral equilibrium generally exists, and in equilibrium the parties propose different policies. Convergence of equilibrium to median voter politics is proved as uncertainty about the distribution of voter traits becomes small. 相似文献
62.
E. Reschenhofer 《Statistical Papers》1994,35(1):309-322
The suitability of autoregressive fractionally integrated moving average (ARFIMA) processes for the modeling of US aggregate output is examined. We consider the two most widely used methods for the estimation of the fractionally differencing parameter and discuss the empirical results obtained by applying these methods to the quarterly post-war real GNP as well as to the quarterly post-war real GNP per capita. Contrary to previous findings, we conclude that evidence for a fractional degree of integration is poor. 相似文献
63.
V. Scott H. Solberg Aaron H. Carlstrom Kimberly A. S. Howard Janice E. Jones 《The Career development quarterly》2007,55(4):313-327
Using cluster analysis, 789 predominately Latino and African American high school youth were classified into varying academic at‐risk profiles using self‐reported levels of academic confidence, motivation to attend school, perceived family support, connections with teachers and peers, and exposure to violence. Six clusters emerged, 5 of which were identified as “at‐risk.” The clusters were examined in relation to academic stress, health status, grades, and school retention. Exposure to violence was one distinguishing feature of youth identified as most vulnerable, vulnerable, and resilient; however, youth identified as resilient recorded better academic outcomes. 相似文献
64.
65.
Susan E. Frohlick 《Revue canadienne de sociologie》2003,40(5):525-542
Within the anthropology of tourism, “tourist” and “local” are often used to conceptualize social relations constitutive of international tourism, where “First World” mobile subjects visit stationary “Third World” “Others.” Globalization, as both discourse and condition, is changing the contours and conceptualizations of tourist spaces. In this paper, I show how “the global” is negotiated by different subjects, and how recreational mountain climbers from Nepal negotiate their identities as “locals” as well as global, mobile, travel subjects within “the global playscapes” of Himalayan mountaineering. I suggest that the question of who can be a tourist within a globalizing world should be closely examined. 相似文献
66.
In this study, individualism vs collectivism, in line with the work of Triandis in 1985, was assessed in two groups of male and female students, in Egypt and Germany. The results confirm the effect that cultural background has on individualist vs collectivist orientations in both of these cultures for male and female students. Men and women scored higher on individualism in Germany than in Egypt, whereas collectivism scores were higher in Egypt than in Germany. These findings are discussed in terms of general recommendations for intercultural interventions that discourage viewing people solely in terms of group membership, and instead as distinct individuals. 相似文献
67.
In conjunction with TIMET at Waunarlwydd (Swansea, UK) a model has been developed that will optimise the scheduling of various blooms to their eight furnaces so as to minimise the time taken to roll these blooms into the finished mill products. This production scheduling model requires reliable data on times taken for the various furnaces that heat the slabs and blooms to reach the temperatures required for rolling. These times to temperature are stochastic in nature and this paper identifies the distributional form for these times using the generalised F distribution as a modelling framework. The times to temperature were found to be similarly distributed over all furnaces. The identified distributional forms were incorporated into the scheduling model to optimise a particular campaign that was run at TIMET Swansea. Amongst other conclusion it was found that, compared to the actual campaign, the model produced a schedule that reduced the makespan by some 35%. 相似文献
68.
Mary M. Shaw 《Nonprofit management & leadership》2003,14(1):107-120
Public and private funding sources often require nonprofit organizations to provide evidence of partnership with a governmental entity before financing a project. However, the circumstances under which working partnerships between the nonprofit and public sectors are forged and sustained have not been fully studied. This article presents the findings of a case study of land trusts and local governments and identifies conditions that foster successful collaboration. Social factors such as experience on the part of key personnel in working with the opposite entity and genuine affection for each other are more important than economic benefits. This suggests that a nonprofit agency interested in creating a viable partnership to improve a project should give careful consideration to assigning staff. 相似文献
69.
70.
It is well known that the unimodal maximum likelihood estimator of a density is consistent everywhere but at the mode. The authors review various ways to solve this problem and propose a new estimator that is concave over an interval containing the mode; this interval may be chosen by the user or through an algorithm. The authors show how to implement their solution and compare it to other approaches through simulations. They show that the new estimator is consistent everywhere and determine its rate of convergence in the Hellinger metric. 相似文献