全文获取类型
收费全文 | 7251篇 |
免费 | 81篇 |
国内免费 | 1篇 |
专业分类
管理学 | 1045篇 |
民族学 | 26篇 |
人才学 | 1篇 |
人口学 | 633篇 |
丛书文集 | 23篇 |
理论方法论 | 605篇 |
综合类 | 112篇 |
社会学 | 3277篇 |
统计学 | 1611篇 |
出版年
2023年 | 56篇 |
2020年 | 128篇 |
2019年 | 190篇 |
2018年 | 166篇 |
2017年 | 256篇 |
2016年 | 179篇 |
2015年 | 145篇 |
2014年 | 168篇 |
2013年 | 1304篇 |
2012年 | 234篇 |
2011年 | 201篇 |
2010年 | 167篇 |
2009年 | 140篇 |
2008年 | 202篇 |
2007年 | 185篇 |
2006年 | 167篇 |
2005年 | 137篇 |
2004年 | 115篇 |
2003年 | 111篇 |
2002年 | 128篇 |
2001年 | 155篇 |
2000年 | 133篇 |
1999年 | 117篇 |
1998年 | 104篇 |
1997年 | 102篇 |
1996年 | 106篇 |
1995年 | 96篇 |
1994年 | 75篇 |
1993年 | 107篇 |
1992年 | 119篇 |
1991年 | 87篇 |
1990年 | 108篇 |
1989年 | 93篇 |
1988年 | 90篇 |
1987年 | 83篇 |
1986年 | 80篇 |
1985年 | 68篇 |
1984年 | 95篇 |
1983年 | 80篇 |
1982年 | 81篇 |
1981年 | 48篇 |
1980年 | 72篇 |
1979年 | 86篇 |
1978年 | 62篇 |
1977年 | 65篇 |
1976年 | 57篇 |
1975年 | 71篇 |
1974年 | 57篇 |
1972年 | 55篇 |
1971年 | 46篇 |
排序方式: 共有7333条查询结果,搜索用时 15 毫秒
151.
The Community Prevention Trial was 5-year effort to reduce alcohol-involved injuries and death through a comprehensive program of community awareness and policy activities. The three experimental communities were of approximately 100,000 population each (one in Northern California, one in Southern California, and one in South Carolina). Matched comparison communities were used for each experimental community. This article describes the evaluation approach used in a program that sought to change environmental factors not a specific population or target group. This approach demanded unique evaluation approaches for determining overall community aggregate effects, that is, distal outcomes, as well as changes in key mediating variables, that is, process effects. The problem of trending and lagged effects of community prevention programs are discussed. 相似文献
152.
This article provides recommendations and observations about evaluation of a locally based prevention project to reduce problems at a total community or aggregate level. The shift from targeting specific individuals or subpopulations to the overall structure and environment of a community is most demanding. Evaluation tools and analysis techniques have lagged behind program development because community-level interventions are not linked to a specific target group who can be separately studied. Thus assumptions about using random assignment and/or comparison communities as means to control for confounding variables are weakened when the unit of analysis is the community itself and dependent measures are subject to trending and the effects of history. 相似文献
153.
The purpose of this study is to examine attitudes regarding who should be included in wills following divorce and remarriage. Respondents were 268 men and 439 women. In mailed vignettes, they indicated whom they thought should be included in an elder's will. Three variables were examined: (a) family closeness, (b) contact after divorce, and (c) remarriage. Three factors were associated with inheritance obligations: (a) genetic ties, (b) patriarchal lineage, and (c) family ties, which were defined more broadly than genetic relationships. Few respondents mentioned factors such as family closeness and reciprocity. There was little agreement regarding who is and who is not in the family, but inheritance clearly was limited to family. Obligation to include the next of kin in the will supersedes obligations based upon closeness and frequency of contact. 相似文献
154.
J. Custance & H. Hillier 《Journal of the Royal Statistical Society. Series A, (Statistics in Society)》1998,161(3):281-290
This paper describes the background to the development of a new official set of national indicators of sustainable development—one of the first in the world to be published. The paper discusses the role of statisticians in helping to define sustainable development, and the problems of monitoring and reporting progress. The Minister of State for the Environment has announced his ambition of developing a very small set of headline indicators. This paper is intended to help to stimulate the debate over what they should be. 相似文献
155.
H. Dette & A. Munk 《Journal of the Royal Statistical Society. Series B, Statistical methodology》1998,60(4):693-708
The importance of being able to detect heteroscedasticity in regression is widely recognized because efficient inference for the regression function requires that heteroscedasticity is taken into account. In this paper a simple consistent test for heteroscedasticity is proposed in a nonparametric regression set-up. The test is based on an estimator for the best L 2 -approximation of the variance function by a constant. Under mild assumptions asymptotic normality of the corresponding test statistic is established even under arbitrary fixed alternatives. Confidence intervals are obtained for a corresponding measure of heteroscedasticity. The finite sample performance and robustness of these procedures are investigated in a simulation study and Box-type corrections are suggested for small sample sizes. 相似文献
156.
This paper develops a model ofinter vivos gifts and bequests in a setting of moral hazard and adverse selection. Altruistic parents do not perfectly know how much effort their children make to earn their living, nor do they know their true level of ability.Inter vivos gifts take place prior to the realization of the children's earnings whereas at the moment of bequests, parents do observe them. We show that an optimal transfer policy generally uses a mix ofinter vivos gifts — deemed as more efficient — and bequests — deemed as more redistributive.We are thankful to Allessandro Cigno, Jacques Cremer, Claude d Aspremont and anonymous referees for their comments.Responsible editor: Alessandro Cigno 相似文献
157.
The projected increase of people in Japan aged 75 years and older in the years to come implies the increase of the disabled elderly. Thus, the core of societal preparation for the aging of the population is generally considered to be the expansion of services for the disabled elderly. However, gerontological studies on the health status of the elderly conducted in Japan show that the prevalence of disability is quite low and even decreasing. Relative to the services for the disabled elderly, preventive services for the healthy elderly have long been overlooked. In 1994, the Metropolitan Tokyo Government organized a task force to develop a new health education program as the preventive health service for the healthy urban elderly. A preliminary plan outlining the health education program--consisting of propagation with a booklet, on-the-job training of practitioners, and development of new curricula and teaching materials--was proposed by the authors for discussion within the task force. Although the inquiry has just begun and the plan is still nascent, it seems adequate to fit the needs for preventive health services in the near future. 相似文献
158.
Experiments involving large social units, such as schools, work sites, or whole cities, are commonly limited in statistical power because the number of randomized units is small, leaving few degrees of freedom for residual (between-unit) error. The authors describe a method for increasing residual degrees of freedom in a community experiment without substantially increasing cost or difficulty. In brief, they propose that the experimental units should be divided into random subsamples (batches). Batch sampling can improve statistical power if the community endpoint means are stable over time or if their temporal variation is comparable in period to the batch-sampling schedule. The authors demonstrate the theoretical advantages of the batch system and illustrate its use with data from the Pawtucket Heart Health Program, in which such a design was implemented. 相似文献
159.
Despite the substantial body of literature concerned with the ways in which digital media are transforming contemporary society and institutional life, we have relatively little understanding of the ways in which new technologies feature in day to day organizational conduct and interaction. There is however a growing corpus of empirical research which places the situated and contingent character of new technologies at the heart of the analytic agenda, but as yet, these studies are relatively little known within sociology. They include ethnographies of command and control centres, financial institutions, the news media, and the construction industry. They address the ways in which tools and technologies, ranging from paper documents through to complex multimedia systems, feature in work and collaboration. In this paper, we discuss these so-called 'workplace studies' and consider their implications for our understanding of organizational conduct, social interaction and new technology. 相似文献
160.
This is a reflective and reflexive account of the individual and shared work experiences of three Black female Senior Lecturers working in higher education. Through the process of sharing our common experiences we not only make visible the details of the race and gender oppression we face, but also the acts of resistance we engage in within the academic community. We draw on our understanding of Black feminist principles and ideas to explore and analyse our experiences as Black professional women; this exploration is central to the development of the strategies that we propose. These strategies, we believe will enable Black women and others engaged in the process of change to continually challenge and resist the oppressive power relations that characterise academic environments. Ici nous donnons un compte rendu réflexif qui s'agit des expériences non seulement collectives entre trois conférencières Noires universitaires, mais aussi des expériences plutôt privées de cettes chercheuses. Par le processus de partager de cette façon nos expériences nous faisons visible l'oppression raciste et sexiste qui se presente dans la vie quotidienne. En meme temps on essaye de souligner la résistance dans laquelle on s'engage dans la communauté scolaire. Par notre compréhension des principes et des idées féministes nous sommes capables d'explorer et d'analyser nos expériences en tant que femmes Noires professionelles. En plus, cette exploration est centrale au développement des stratégies que nous proposons. Nous croyons que par cettes stratégies les Noires (et les femmes en général qui sont engagées dans les efforts d'effectuer le changement) auront le pouvoir de lancer un défi continuel et de résister l'abus de pouvoir accablant qui existe àchaque moment dans les environnements scolaires. 相似文献