全文获取类型
收费全文 | 15413篇 |
免费 | 150篇 |
国内免费 | 3篇 |
专业分类
管理学 | 2088篇 |
民族学 | 134篇 |
人口学 | 2873篇 |
丛书文集 | 30篇 |
理论方法论 | 875篇 |
综合类 | 381篇 |
社会学 | 6673篇 |
统计学 | 2512篇 |
出版年
2023年 | 34篇 |
2022年 | 24篇 |
2021年 | 31篇 |
2020年 | 84篇 |
2019年 | 153篇 |
2018年 | 1799篇 |
2017年 | 1897篇 |
2016年 | 1219篇 |
2015年 | 154篇 |
2014年 | 162篇 |
2013年 | 1040篇 |
2012年 | 506篇 |
2011年 | 1292篇 |
2010年 | 1151篇 |
2009年 | 922篇 |
2008年 | 941篇 |
2007年 | 1107篇 |
2006年 | 93篇 |
2005年 | 322篇 |
2004年 | 338篇 |
2003年 | 295篇 |
2002年 | 186篇 |
2001年 | 106篇 |
2000年 | 100篇 |
1999年 | 100篇 |
1998年 | 84篇 |
1997年 | 72篇 |
1996年 | 89篇 |
1995年 | 79篇 |
1994年 | 62篇 |
1993年 | 66篇 |
1992年 | 73篇 |
1991年 | 71篇 |
1990年 | 80篇 |
1989年 | 65篇 |
1988年 | 55篇 |
1987年 | 46篇 |
1986年 | 53篇 |
1985年 | 59篇 |
1984年 | 60篇 |
1983年 | 46篇 |
1982年 | 40篇 |
1981年 | 39篇 |
1980年 | 44篇 |
1979年 | 47篇 |
1978年 | 40篇 |
1977年 | 28篇 |
1975年 | 21篇 |
1974年 | 22篇 |
1971年 | 21篇 |
排序方式: 共有10000条查询结果,搜索用时 171 毫秒
101.
Are the decisions of American policymakers informed by generaltrends in the publics ideology or by the publicspolicy-specific preferences? In this article we discuss twoexplanations for the types of public opinion information thatpoliticians collect and use. Using a unique data set of privatepolls from the White House of Richard Nixon, we find that whenopinion data on specific policies were available, the presidentrelied on them and not on general ideology data. On less importantissues, however, we find that the president often chose notto collect policy-specific data and instead relied on generalideology data. The differential collection and use of informationby policymakers reflect varying strategic calculations. Theyalso have profound implications for representative democracyand the demands placed on citizens and governors. 相似文献
102.
Nora Gustavsson Ph.D. Sandra Kopels J.D. M.S.W. 《Child and Adolescent Social Work Journal》1992,9(5):457-467
Child welfare workers and agencies are vulnerable to lawsuits. Recent court rulings have more clearly defined the liability of workers. The distinguishing variable is custody. Children injured while in the custody of the state are entitled to sue for damages. Children injured by their parent, even if under the supervision of a child welfare agency, are not entitled to claim a violation of their 14th Amendment rights. These cases are reviewed and strategies designed to minimize vulnerability are offered. 相似文献
103.
Cornelia Edding 《Organisationsberatung, Supervision, Coaching》2005,12(1):21-30
Supporting processes of belonging in supervision and coachingThe contemporary employee has to cope with frequent changes. Not only does he lose his familiar environment, he also has to find ways to familiarize himself with new places and to develop a fresh sense of belonging. This process can be understood and facilitated by interpreting the German concept of “Heimat“ as something we have to create ourselves. First experiences demonstrate the usefulness of this approach in coaching processes. 相似文献
104.
In this paper, the task of determining expected values of sample moments, where the sample members have been selected based on noisy information, is considered. This task is a recurring problem in the theory of evolution strategies. Exact expressions for expected values of sums of products of concomitants of selected order statistics are derived. Then, using Edgeworth and Cornish-Fisher approximations, explicit results that depend on coefficients that can be determined numerically are obtained. While the results are exact only for normal populations, it is shown experimentally that including skewness and kurtosis in the calculations can yield greatly improved results for other distributions. 相似文献
105.
Tarani Chandola Paul Clarke J. N. Morris David Blane 《Journal of the Royal Statistical Society. Series A, (Statistics in Society)》2006,169(2):337-359
Summary. The association of poor education and poor health has been consistently observed in many studies and in various countries. Thus far, studies examining the mechanisms underlying this association have looked at only a limited set of potential pathways. This study simultaneously examines six distinctive pathways, which have been hypothesized to link education and health and found support from previous studies. A causal analysis of education and health was performed using structural equation models. Data were used from six phases of the National Child Development Study, which is based on following up an initial sample of 17416 children who were born in 1958. The association between education and health appears to be explained by a combination of mechanisms: adolescent health and adult health behaviours for men and women, adult social class among men and parental social class among women. We conclude that improvements in population educational attainment may not automatically lead to improvements in population health, and that health policies for improving health and reducing health inequalities need to target specific causal pathways. 相似文献
106.
Roberts J Matthews WJ Bodin NA Cohen D Lewandowski L Novo J Pumilia J Willis C 《Journal of marital and family therapy》1989,15(4):397-410
Working with a treatment and observing team at the same time, behind the oneway mirror, offers a variety of ways to: (a) generate multiple realities; (b) work with two different models of family therapy simultaneously; and (c) provide feedback on the teams' own roles, rules and group process. The process that 6 trainees and two supervisors used with T and O teams to examine their own coevolution as a therapeutic system using the Milan model of family therapy and Ericksonian hypnotherapy is described. The article concludes with a discussion of the advantages and pitfalls of this type of dual supervision. 相似文献
107.
N Andes 《Journal of health and social behavior》1989,30(4):386-397
Socioeconomic, medical care, and public health contexts are examined in Peruvian communities for their relationship to infant mortality. A deviant case analysis is used to uncover characteristics important in the social structure of Peruvian communities. Results from fieldwork in two "deviant" communities suggest that economic diversity, income disparity, social class fluidity, and women's autonomy, along with refined measures of medical care and public health resources, are important in understanding differentials in mortality. Attention is drawn to the community context and to the interplay of socioeconomic determinants affecting infant mortality. 相似文献
108.
2 evaluative views of worker remittances draw opposite conclusions. The negative one posits that remittances increase dependency, contribute to economic and political stability and development distortion, and lead to economic decline that overshadows a temporary advantage for a fortunate few. The positive view sees remittances as an effective response to market forces, providing a transition to an otherwise unsustainable development. They improve income distribution and quality of life beyond what other available development resources could deliver. The implications are tested for labor supply countries to Europe and the Middle East. The implications of the negative are not supported. Although the dire predictions of the pessimistic view have not materialized, the converse - contributions of remittances to economic performance - should not be overstated due to a lack of data. 相似文献
109.
N. Balakrishnan 《Statistical Papers》1989,30(1):141-146
We derive a simple relation satisfied by the covariances of order statistics in the i.i.d. case and then generalize it to
the case when the variables are independent and non-identically distributed. This relation could be employed successfully
either to check the calculations or to reduce the amount of direct computations involved in evaluating the covariances of
order statistics from an outlier model. 相似文献
110.
R N Wennberg 《Journal of American college health : J of ACH》1989,37(6):299-303
In this issue is a lengthy, thought-provoking essay on the issues raised by unwanted pregnancy. Written by Robert Wennberg in 1984 for the Christian Scholar's Review (13:4), the article has been edited and condensed for our purposes and is quite relevant, I believe, for the student health population. Any practitioner who cares for students wrestling with these issues should at least acknowledge the moral and philosophical dilemmas presented. As one who has walked both sides of the argument, I find Wennberg's fair-mindedness compelling. In closing his article, the author raises the question of what will happen when it becomes possible to accomplish an "abortion"--or removal of the fetus from the mother--without killing the fetus. Will this procedure be acceptable to the average single college student? The New York Times, in an article on "High Tech Babies" (February 21, 1986), raised ethical questions posed by the technology of frozen embryos. Who decides what is to be done with frozen embryos? To whom do they belong? Do they have rights? The theoretical issues raised by Wennberg are already forcing themselves upon us. Whether we like it or not, the future is now. Regardless of your beliefs on this controversial topic, I urge you to read this article. Dr. Wennberg has also just completed a book on this subject, Life In The Balance. 相似文献