首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1757篇
  免费   68篇
管理学   153篇
民族学   24篇
人口学   200篇
丛书文集   5篇
理论方法论   161篇
综合类   24篇
社会学   1004篇
统计学   254篇
  2024年   2篇
  2023年   11篇
  2022年   15篇
  2021年   22篇
  2020年   71篇
  2019年   75篇
  2018年   90篇
  2017年   112篇
  2016年   90篇
  2015年   47篇
  2014年   55篇
  2013年   325篇
  2012年   106篇
  2011年   70篇
  2010年   60篇
  2009年   47篇
  2008年   50篇
  2007年   46篇
  2006年   43篇
  2005年   43篇
  2004年   44篇
  2003年   43篇
  2002年   38篇
  2001年   23篇
  2000年   28篇
  1999年   33篇
  1998年   11篇
  1997年   17篇
  1996年   13篇
  1995年   16篇
  1994年   12篇
  1993年   27篇
  1992年   18篇
  1991年   16篇
  1990年   8篇
  1989年   7篇
  1988年   8篇
  1987年   10篇
  1986年   4篇
  1985年   8篇
  1984年   8篇
  1983年   7篇
  1982年   11篇
  1981年   9篇
  1980年   5篇
  1979年   3篇
  1978年   3篇
  1977年   5篇
  1976年   5篇
  1968年   4篇
排序方式: 共有1825条查询结果,搜索用时 0 毫秒
571.
This article examines the impacts of the financial, food and fuel crises on poor and vulnerable households in two states of Nigeria: Lagos and Kano. It uses retrospective household‐level data to analyze the impacts of induced price variability on household welfare. The results indicate that aggregate shocks have significant adverse effects on household consumption, schooling and child labour decisions, with a degree of impact heterogeneity across regions and rural and urban areas of the country. We find that the coping strategies adopted by the poor to deal with the short‐term effects of the crises can lock households in a low‐income equilibrium or poverty trap. Provided that covariate shocks exacerbate these effects, they become central for policy design.  相似文献   
572.
This article analyzes the efficiency levels of nonprofit sports clubs through the data envelopment analysis methodology and specifically evaluates how efficient and inefficient clubs perceive the distinct contribution of stakeholders in attaining their respective levels of output efficiency. The results distinguish the varying levels of efficiency between such clubs and highlight significant differences in the roles of the local government and of associations and federations in attaining these efficiency levels. The study further suggests best practices that can be adopted by officials at inefficient clubs toward reducing or eliminating their shortfalls in efficiency.  相似文献   
573.
Service user involvement is steadily on the rise, bringing questions of tokenism and power imbalance. This article studies service user organisation representatives (URs) and human service organisation representatives (HSORs) in mental health and social care strategic collaboration councils through qualitative interviews and participant observations. Talk on service user involvement through UR is studied through the discourse analytical concepts of ideological dilemmas and subject positions. The participants' constructions, actions, and rhetoric therein are considered. Findings show participants' oscillation between standpoints within two main themes: the ideal vs. the inadequate UR and balancing power positions. The first theme discusses the missing perspective brought by UR narrations in terms of expected conduct and awareness of organisational conditions. This also concerns service users' positions as being simultaneously dependent and independent. The second theme concerns the implicit UR influence and the explicit HSOR influence. User involvement through URs is construed as a needed narration told by citizens with rights and responsibilities, while conditioned, as the UR is a layperson with mental health problems. The actions accompanying such constructions cause HSORs to balance between paternalism and professionalism and URs between adaptation and using their voice. In this, the URs have a stronger influence than acknowledged.  相似文献   
574.
This study examines the sensitivity of future long-term care demand and expenditure estimates to official demographic projections in four selected European countries: Germany, Spain, Italy and the United Kingdom. It uses standardised methodology in the form of a macro-simulation exercise and finds evidence for significant differences in assumptions about demographic change and its effect on the demand for long-term care, and on relative and absolute long-term care expenditure. It concludes that mortality-rate assumptions can have a considerable influence on welfare policy planning. Relative dispersion between country-specific and Eurostat official estimates was found to be higher for the United Kingdom and Germany than for Italy and Spain, suggesting that demographic projections had a greater influence in those countries.
Joan Costa-FontEmail:
  相似文献   
575.
The goal of the present study was to determine to what extent an adolescent's subjective well-being is affected when changes in family structure reach a breaking point and the child can no longer stay with his family, but must be institutionalized. The participants were one hundred male and female adolescents, 12 to 19 years of age, 50 of which lived in children's homes, but were originally from 50 different families, and 50 of which lived at home with their parents. Two questionnaires were administered: (a) the French adaptation of the Life Satisfaction Scale (Blais et al., 1989) and (b) a questionnaire containing statements related to level of satisfaction in several areas, notably family relationships, body image, work and schooling, and leisure acitivites. The difference between the two groups was considerable, with more than one point separating the mean levels of satisfaction of the two groups (20% of the total length of the scale employed). A structural analysis of the results showed the direct or indirect influence of three factors related to placement in a children's home on life satisfaction: a direct effect of placement in a children's home, an indirect effect passing through the satisfaction with family life, and an indirect effect passing through the personal growth.  相似文献   
576.
The paper addresses the problem of estimating missing observations in an infinite realization of a linear, possibly nonstationary, stochastic processes when the model is known. The general case of any possible distribution of missing observations in the time series is considered, and analytical expressions for the optimal estimators and their associated mean squared errors are obtained. These expressions involve solely the elements of the inverse or dual autocorrelation function of the series.

This optimal estimator -the conditional expectation of the missing observations given the available ones- is equal to the estimator that results from filling the missing values in the series with arbitrary numbers, treating these numbers as additive outliers, and removing with intervention analysis the outlier effects from the invented numbers.  相似文献   
577.
578.
Non‐verbal referential communication is impaired in children with autism spectrum disorders (ASD). However, the development of difficulties with referential communication in the younger siblings of children with ASD (High‐Risk Siblings)—and the degree to which early referential communication predicts later autism symptomatology—is not clear. We modeled the early developmental trajectories of three types of referential communication: responding to joint attention (RJA), initiating joint attention (IJA), and initiating behavioral requests (IBR) across 8, 10, 12, 15, and 18 months of age in High‐Risk Siblings (= 40) and the infant siblings of children without ASD (Low‐Risk Siblings; = 21). Hierarchical linear modeling indicated that High‐Risk Siblings exhibited lower levels of baseline RJA and IJA and a lower rate of linear change in IBR than Low‐Risk Siblings. When the 10 High‐Risk Siblings who received an ASD diagnosis were excluded from analyses, group differences in the development of referential communication remained significant only for RJA. Baseline levels of IJA were associated with later ASD symptomatology among High‐Risk Siblings, suggesting that individual differences in referential communication development at 8 months may index early manifestations of ASD.  相似文献   
579.

This study about researchers' transitions to using qualitative data analysis (QDA) software identified three stages of 'closeness to the data': the tactile-digital divide; the coding trap; and the metacognitive shift. The 'tactile-digital divide' involves adapting to working on screen instead of paper, an initially distancing process. As users gain comfort with the software, they experience 'the coding trap'--an issue of too much closeness to the data. Users warned that there was a tendency to become 'bogged down' in coding, and developed strategies to provide analytical distance. 'The metacognitive shift' involves learning to think about software processes with the same level of reflectivity that should accompany qualitative research processes in general, including developing strategies for error recognition. These transitions invite reflections on the nature of 'cognitive tools' and expertise with them, which lead to implications for evaluating research and considering trustworthiness.  相似文献   
580.
Little is known about gambling rates of drug users recruited from drug treatment compared with those recruited from the community. We use the Diagnostic Interview Schedule (DIS) to provide lifetime prevalence estimates of problem gambling (i.e., at least one gambling problem) and DSM-III-R pathological gambling (i.e., at least four gambling problems) and describe the association between gambling and psychiatric disorders for drug users recruited from drug treatment settings (n = 512) and from the community (n = 478). We also report the relative risk of being a recreational and problem gambler in this sample. The sample was first interviewed in 1989–90 as a partof two NIDA-funded St. Louis-based studies. The prevalence of problem gambling in the overall sample was 22% and the prevalence of pathological gambling was 11%. There were no statistically significant differences in problem and pathological gambling rates for subjects recruited from drug treatment and those recruited from the community. The conditional prevalence rates, that is, the rate of problem and pathological gambling only among gamblers were 27% and 13.5%, respectively. Major findings indicate that problem gambling was associated with Antisocial Personality Disorder (ASPD), even after controlling for recruitment source and socio-demographic characteristics. In fact, when examining the temporal order of these disorders, we found that pathological gambling was always secondary to ASPD, occurring on average 11.4 years after the onset of ASPD. Problem gamblers, compared with everyone else, were more likely to be male, African-American, recruited from drug treatment, have ASPD and be dependent on illicit drugs. Multinomial logistic regression analysis predicted the relative risk of being a recreational and problem gambler (compared with a nongambler) in this sample according to socio-demographics, ASPD, and dependence on illicit drugs. Results imply that screening for gambling problems will need to be broad-based among drug users.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号