全文获取类型
收费全文 | 8199篇 |
免费 | 183篇 |
专业分类
管理学 | 1212篇 |
民族学 | 31篇 |
人口学 | 817篇 |
丛书文集 | 33篇 |
理论方法论 | 638篇 |
综合类 | 107篇 |
社会学 | 3536篇 |
统计学 | 2008篇 |
出版年
2020年 | 120篇 |
2019年 | 160篇 |
2018年 | 224篇 |
2017年 | 288篇 |
2016年 | 204篇 |
2015年 | 139篇 |
2014年 | 202篇 |
2013年 | 1346篇 |
2012年 | 266篇 |
2011年 | 250篇 |
2010年 | 184篇 |
2009年 | 176篇 |
2008年 | 149篇 |
2007年 | 192篇 |
2006年 | 164篇 |
2005年 | 172篇 |
2004年 | 159篇 |
2003年 | 156篇 |
2002年 | 152篇 |
2001年 | 209篇 |
2000年 | 195篇 |
1999年 | 177篇 |
1998年 | 132篇 |
1997年 | 130篇 |
1996年 | 132篇 |
1995年 | 108篇 |
1994年 | 108篇 |
1993年 | 102篇 |
1992年 | 151篇 |
1991年 | 124篇 |
1990年 | 120篇 |
1989年 | 114篇 |
1988年 | 104篇 |
1987年 | 93篇 |
1986年 | 97篇 |
1985年 | 113篇 |
1984年 | 112篇 |
1983年 | 125篇 |
1982年 | 99篇 |
1981年 | 91篇 |
1980年 | 90篇 |
1979年 | 102篇 |
1978年 | 93篇 |
1977年 | 81篇 |
1976年 | 68篇 |
1975年 | 69篇 |
1974年 | 59篇 |
1973年 | 58篇 |
1972年 | 43篇 |
1971年 | 50篇 |
排序方式: 共有8382条查询结果,搜索用时 312 毫秒
221.
In the 1970s motion picture studios increased their use of blind bidding and nonrefundable guarantees in an attempt to reduce the risks associated with producing a small number of large budget films. However, theater owners claimed that blind bidding and guarantees shifted risk to them and increased the likelihood of bankruptcy, because they were required to bid for the right to exhibit a movie without seeing it first. In response to the lobbying of theater owners, 24 states passed laws between 1978 and 1984 that banned blind bidding, while 7 states also banned nonrefundable guarantees. This paper provides the first empirical analysis of the conflicting claims made by theater owners and movie studios about the impact of these laws on the survival rates of independent theaters, admission prices, and delays in the release of movies. We find that the laws were not only ineffective in keeping theater owners at risk of bankruptcy from exiting the market; they may have been even detrimental to those theater owners converting theaters to multiplexes at that time. (JEL K, L) 相似文献
222.
Astrid M. G. Poorthuis Sander Thomaes Marcel A. G. van Aken Jaap J. A. Denissen Bram Orobio de Castro 《Social Development》2014,23(4):770-783
The transition from primary to secondary school challenges children's psychological well‐being. A cross‐transitional longitudinal study (N = 306; mean age = 12.2 years) examined why some children's self‐esteem decreases across the transition whereas other children's self‐esteem does not. Children's expected social acceptance in secondary school was measured before the transition; their actually perceived social acceptance was measured after the transition. Self‐esteem and Big Five personality traits were measured both pre‐ and posttransition. Self‐esteem changed as a function of the discrepancy between children's expected and actually perceived social acceptance. Furthermore, neuroticism magnified self‐esteem decreases when children's ‘hopes were dashed'—when they experienced disappointing levels of social acceptance. These findings provide longitudinal support for sociometer theory across the critical transition to secondary school. 相似文献
223.
224.
Stéphane Helleringer Gilles Pison Almamy M. Kanté Géraldine Duthé Armelle Andro 《Demography》2014,51(2):387-411
Estimates of adult mortality in countries with limited vital registration (e.g., sub-Saharan Africa) are often derived from information about the survival of a respondent’s siblings. We evaluated the completeness and accuracy of such data through a record linkage study conducted in Bandafassi, located in southeastern Senegal. We linked at the individual level retrospective siblings’ survival histories (SSH) reported by female respondents (n = 268) to prospective mortality data and genealogies collected through a health and demographic surveillance system (HDSS). Respondents often reported inaccurate lists of siblings. Additions to these lists were uncommon, but omissions were frequent: respondents omitted 3.8 % of their live sisters, 9.1 % of their deceased sisters, and 16.6 % of their sisters who had migrated out of the DSS area. Respondents underestimated the age at death of the siblings they reported during the interview, particularly among siblings who had died at older ages (≥45 years). Restricting SSH data to person-years and events having occurred during a recent reference period reduced list errors but not age and date errors. Overall, SSH data led to a 20 % underestimate of 45 q 15 relative to HDSS data. Our study suggests new quality improvement strategies for SSH data and demonstrates the potential use of HDSS data for the validation of “unconventional” demographic techniques. 相似文献
225.
226.
Shirley Musich Ronald J. Ozminkowski Frank G. Bottone Jr. Kevin Hawkins Shaohung S. Wang Janelle G. Ekness 《Journal of women & aging》2014,26(2):146-159
Numerous barriers to managing coronary artery disease (CAD) among older women are reported in the literature; however, few studies adjust for demographic and health status differences. A survey assessing barriers and other factors was distributed to a stratified random sampling of older women with CAD. Factor analysis and multiple logistic regression procedures were used to estimate the impact of these issues on receiving a CAD-related office visit. The most problematic barriers included denial and low health literacy. Efforts to promote patient awareness of heart health and better communication between patients and clinicians may alleviate these barriers. 相似文献
227.
Günther Josef Mohr 《Organisationsberatung, Supervision, Coaching》2016,23(4):411-426
In the article results of resilience research are presented and a systemic concept of resilience is derived, which differentiates the term from other models regarding psychic health. The resilience square shows essential factors for resilience. Based on this the idea of resilience is transferred to systems and organizations. The article deepens the resilience approach of Mohr (2016). 相似文献
228.
Does the life cycle of economic papers differ across fields of economic research? By constructing and analyzing a large dataset that combines information on 9,672 articles published in the top five economic journals from 1970 to 2000 with detailed yearly citation data obtained from Google Scholar, we find that published articles do have a life cycle that differs across fields of economic research (which we divide into the categories of applied, applied theory, econometric methods, and theory). Applied and applied theory papers are the clear winners in terms of citation counts. For the first years after their publication, they receive higher numbers of citations per year than papers in other fields of research do. They also reach a higher peak number of citations per year and apparently sustain those peak levels for longer, in addition to being cited over longer periods of time (i.e., they have a longer lifespan). Citation patterns are much less favorable for theoretical papers, which are the object of fewer citations per annum in the first years following publication, have lower peak numbers and a shorter lifespan. Econometric method papers are a special case; the pattern for most of these papers is similar to the pattern for theory papers, but the most successful papers (as measured by the number of citations) on econometric methods are also the most successful papers in the entire discipline of economics. (JEL A14) 相似文献
229.
230.
Demographic change and shifting views about marine resources and the coastal environment in Downeast Maine 总被引:1,自引:0,他引:1
Connections to the sea often define the character of coastal towns. However, as migrants arrive and economic diversification occurs, views about the use of marine resources and the ocean environment can change. Using survey data from Maine, we examined whether shifting demographics affect public perceptions of marine resource uses and coastal environmental concerns. We tested resource use and environmental items against a common set of demographic, background, and place-related variables. Results indicate that the level of education and the county of residence predict Mainers?? views about different marine resource uses and ocean-related environmental issues. Political party affiliation strongly influences environmental concern but not views about the use of marine resources. Migration history, on the other hand, has little effect. Understanding community contexts as well as individual background and ideological orientations will be critical as managers attempt to balance alternative uses of marine resources and resolve coastal environmental problems. 相似文献