全文获取类型
收费全文 | 1038篇 |
免费 | 35篇 |
专业分类
管理学 | 139篇 |
民族学 | 17篇 |
人口学 | 89篇 |
丛书文集 | 5篇 |
理论方法论 | 128篇 |
综合类 | 11篇 |
社会学 | 587篇 |
统计学 | 97篇 |
出版年
2023年 | 14篇 |
2022年 | 4篇 |
2021年 | 10篇 |
2020年 | 30篇 |
2019年 | 40篇 |
2018年 | 32篇 |
2017年 | 52篇 |
2016年 | 44篇 |
2015年 | 25篇 |
2014年 | 37篇 |
2013年 | 175篇 |
2012年 | 40篇 |
2011年 | 36篇 |
2010年 | 32篇 |
2009年 | 30篇 |
2008年 | 33篇 |
2007年 | 34篇 |
2006年 | 33篇 |
2005年 | 23篇 |
2004年 | 25篇 |
2003年 | 18篇 |
2002年 | 25篇 |
2001年 | 26篇 |
2000年 | 17篇 |
1999年 | 23篇 |
1998年 | 19篇 |
1997年 | 15篇 |
1996年 | 17篇 |
1995年 | 9篇 |
1994年 | 12篇 |
1993年 | 11篇 |
1992年 | 9篇 |
1991年 | 9篇 |
1990年 | 7篇 |
1989年 | 4篇 |
1988年 | 8篇 |
1987年 | 10篇 |
1986年 | 5篇 |
1985年 | 6篇 |
1984年 | 9篇 |
1983年 | 7篇 |
1982年 | 7篇 |
1981年 | 8篇 |
1980年 | 9篇 |
1979年 | 4篇 |
1978年 | 4篇 |
1976年 | 4篇 |
1974年 | 4篇 |
1970年 | 3篇 |
1969年 | 3篇 |
排序方式: 共有1073条查询结果,搜索用时 409 毫秒
101.
Despite documented benefits of remanufacturing, many manufacturers have yet to embrace the idea of tapping into remanufactured‐goods markets. In this article, we explore this dichotomy and analyze the effect of remanufacturable product design on market segmentation and product and trade‐in prices by studying a two‐stage profit‐maximization problem in which a price‐setting manufacturer can choose whether or not to open a remanufactured‐goods market for its product. Our results suggest that it is optimal for a manufacturer to design a remanufacturable product when the value‐added from remanufacturing is relatively high but product durability is relatively low and innovation is nominal. In addition, we find that entering a remanufactured‐goods market in and of itself does not necessarily translate into environmental friendliness. On the one hand, the optimal trade‐in program could result in low return and/or remanufacturing rates. On the other hand, a low price for remanufactured products could attract higher demand and thereby potentially result in more damage to the environment. Meanwhile, external restrictions imposed on total greenhouse gas emissions draw criticism in their own right because they risk stifling growth or reducing overall consumer welfare. Given these trade‐offs, we therefore develop and compare several measures of environmental efficiency and conclude that emissions per revenue can serve as the best proxy for emissions as a metric for measuring overall environmental stewardship. 相似文献
102.
Christine E. Murray Allison Marsh Pow Anthony Chow Hamid Nemati Jacquelyn White 《Journal of Technology in Human Services》2015,33(2):133-155
There is growing recognition of the need to better understand the intersections between the work of domestic violence service providers and technology. Professionals who work with clients impacted by domestic violence are increasingly using technologies across different aspects of their work, including communicating with other professionals and seeking information and resources via the Internet. The current study used qualitative data from two sources—individual interviews and two focus groups—to learn about domestic violence service providers’ needs and perceptions related to technology use. The results provide insights about technologies used currently, expected benefits of future technological advances, barriers to using technology, and participants’ self-rated levels of comfort with technology. 相似文献
103.
104.
105.
Scott L. Feld Bernard Grofman Richard Hartly Marc Kilgour Nicholas Miller with the assistance of Nicholas Noviello 《Theory and Decision》1987,23(2):129-155
In a majority rule voting game, the uncovered set is the set of alternatives each of which can defeat every other alternative in the space either directly or indirectly at one remove. Research has suggested that outcomes under most reasonable agenda processes (both sincere and sophisticated) will be confined to the uncovered set. Most research on the uncovered set has been done in the context of voting games with a finite number of alternatives and relatively little is known about the properties of the uncovered set in spatial voting games.We examine the geometry of the uncovered set in spatial voting games and the geometry of two important subsets of the uncovered set, the Banks set and the Schattschneider set. In particular, we find both general upper and lower limits on the size of the uncovered set, and we give the exact bounds of the uncovered set for situations with three voters. For situations with three voters, we show that the Banks set is identical to the uncovered set. 相似文献
106.
Numerous position papers have outlined informed consent recommendations for the collection, storage, and future use of biological samples; however, there currently is no consensus regarding what kinds of information should be included in consent forms. This study aimed to determine whether institutional review boards (IRBs) vary in their informed consent requirements for research on stored biological samples, and whether any variation observed could be correlated to factors such as volume of work, IRB members' familiarity with ethical issues in genetic research, and IRBs' use of either of two policy guidelines as resources. A brief survey was mailed to all IRB chairpersons on a mailing list obtained from the Office for Human Research Protections. Survey questions included whether consent forms for the collection of biological samples for future use address each of six provisions recommended in current guidelines and position statements, and whether IRBs used the Office for Protection from Research Risks' 1993 Protecting Human Research Subjects: Institutional Review Board Guidebook, chapter 5 (hereinafter IRB Guidebook) or the National Bioethics Advisory Commission's 1999 Research Involving Human Biological Materials: Ethical Issues and Policy Guidance, Volume I (hereinafter Report) in their deliberations. Despite a low response rate (22%, 427 respondents), results indicate that IRB practices vary substantially. The degree to which the provisions were included in consent forms was found to correlate positively with IRBs that review a greater volume of protocols annually, those that use the National Bioethics Advisory Commission Report in their deliberations, and those that draw on both the Report and the IRB Guidebook. 相似文献
107.
108.
David L. Tschirley Colin Poulton Nicholas Gergely Patrick Labaste John Baffes Duncan Boughton Grald Estur 《Development policy review : the journal of the Overseas Development Institute》2010,28(3):295-323
This article analyses the performance of cotton sectors across East, Southern, and West Africa, paying particular attention to the wide diversity of institutional arrangements that they now exhibit. It finds strong support for earlier contentions regarding trade‐offs between competition and coordination, and between the roles of public and private sectors. New insights provide concrete and context‐specific guidance to policy‐makers and stakeholders regarding the key challenges they will face and the risks they will need to manage as they work to improve productivity and ensure an equitable division of benefits within cotton sectors. 相似文献
109.
110.
The purpose of this study is to examine social outcomes including social interaction opportunities and self-expression, and how they relate to other quality of life indicators. These indicators include the overall assessment of adaptive skills, and the frequency and severity of challenging behaviour. The social interaction opportunities measured in this research include family contact, hours of habilitation, community outings, hours of employment and hours of education. Self-expression refers to the extent to which the individuals assessed indicated liking and choosing what they do in their everyday lives. The data utilised in this study were obtained from personal interviews from 3781 individuals with developmental disabilities and their caregivers. Interviewers received extensive training prior to conducting the assessments. The results indicate that people with higher adaptive ability had more contact with their families, received fewer hours of habilitation, were reported to participate in community outings more frequently, worked more hours and spent fewer hours in education. These significant correlations, however, were of marginal strength. Overall, the frequency and severity of challenging behaviour were not associated with the social interaction opportunities assessed in this study. 相似文献