全文获取类型
收费全文 | 32743篇 |
免费 | 628篇 |
国内免费 | 1篇 |
专业分类
管理学 | 4808篇 |
民族学 | 177篇 |
人才学 | 2篇 |
人口学 | 4492篇 |
丛书文集 | 113篇 |
教育普及 | 3篇 |
理论方法论 | 2640篇 |
现状及发展 | 1篇 |
综合类 | 581篇 |
社会学 | 15374篇 |
统计学 | 5181篇 |
出版年
2021年 | 132篇 |
2020年 | 324篇 |
2019年 | 442篇 |
2018年 | 2065篇 |
2017年 | 2260篇 |
2016年 | 1549篇 |
2015年 | 442篇 |
2014年 | 556篇 |
2013年 | 3678篇 |
2012年 | 1053篇 |
2011年 | 1812篇 |
2010年 | 1528篇 |
2009年 | 1241篇 |
2008年 | 1348篇 |
2007年 | 1529篇 |
2006年 | 594篇 |
2005年 | 777篇 |
2004年 | 754篇 |
2003年 | 676篇 |
2002年 | 606篇 |
2001年 | 595篇 |
2000年 | 619篇 |
1999年 | 529篇 |
1998年 | 388篇 |
1997年 | 371篇 |
1996年 | 420篇 |
1995年 | 361篇 |
1994年 | 340篇 |
1993年 | 339篇 |
1992年 | 393篇 |
1991年 | 364篇 |
1990年 | 326篇 |
1989年 | 342篇 |
1988年 | 338篇 |
1987年 | 286篇 |
1986年 | 293篇 |
1985年 | 332篇 |
1984年 | 321篇 |
1983年 | 288篇 |
1982年 | 246篇 |
1981年 | 218篇 |
1980年 | 197篇 |
1979年 | 236篇 |
1978年 | 214篇 |
1977年 | 191篇 |
1976年 | 166篇 |
1975年 | 192篇 |
1974年 | 141篇 |
1973年 | 130篇 |
1971年 | 114篇 |
排序方式: 共有10000条查询结果,搜索用时 687 毫秒
871.
Tommaso Agasisti Francesca Ieva Anna Maria Paganoni 《Statistical Methods and Applications》2017,26(1):157-180
With the aim of assessing the extent of the differences in the context of Italian educational system, the paper applies multilevel modeling to a new administrative dataset, containing detailed information for more than 500,000 students at grade 6 in the year 2011/2012, provided by the Italian Institute for the Evaluation of Educational System. Data are grouped by classes, schools and geographical areas. Different models for each area are fitted, in order to properly address the heteroscedasticity of the phenomenon. The results show that it is possible to estimate statistically significant “school effects”, i.e., the positive/negative association of attending a specific school and the student’s test score, after a case-mix adjustment. Therefore, the paper’s most important message is that school effects are different in terms of magnitude and types in the three geographical macro areas (Northern, Central and Southern Italy) and are dependent on specific students’ and schools’ characteristics. 相似文献
872.
Haijing Dai Yan Lau Ka Ho Lee 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2017,28(6):2614-2632
After the Asian Financial Crisis, the government of Hong Kong embraced the model of work-integration social enterprise (WISE) to sustain its facilitative and productivist welfare regime. Using the WISE of Pro-Love for marginalized women as a case study, the article examines the meaning of employment and social disadvantage in the organization. The ethnographic data reveal that while the WISE encourages women to participate in the paid labor market, it constructs employment in the social enterprise as part-time jobs for supplementary family income, restricts the extension of social networks for the female workers, and reinforces the cultural stereotypes of marginalized women. The study reflects on the mechanisms of the project of WISE in the welfare contexts of Hong Kong, and argues that programs targeted at labor participation cannot be automatically translated into reduction of exclusion in other domains. Long-term planning, policy coordination, and social advocacy are necessary to achieve social integration. 相似文献
873.
874.
Jonathan P. Beauchamp David Cesarini Magnus Johannesson 《Journal of Risk and Uncertainty》2017,54(3):203-237
We examine the psychometric and empirical properties of some commonly used survey-based measures of risk preferences in a population-based sample of 11,000 twins. Using a model that provides a general framework for making inferences about the component of measured risk attitudes that is not due to measurement error, we show that measurement-error adjustment leads to substantially larger estimates of the predictive power of risk attitudes, of the size of the gender gap, and of the magnitude of the sibling correlation. Risk attitudes are predictive of investment decisions, entrepreneurship, and drinking and smoking behaviors; are robustly associated with cognitive ability and personality; and our estimates are often larger than those in the literature. Our results highlight the importance of adjusting for measurement error across a wide range of empirical settings. 相似文献
875.
Robust tests for comparing scale parameters, based on deviances—absolute deviations from the median—are examined. Higgins (2004) proposed a permutation test for comparing two treatments based on the ratio of deviances, but the performance of this procedure has not been investigated. A simulation study examines the performance of Higgins’ test relative to other tests of scale utilizing deviances that have been shown in the literature to have good properties. An extension of Higgins’ procedure to three or more treatments is proposed, and a second simulation study compares its performance to other omnibus tests for comparing scale. While no procedure emerged as a preferred choice in every scenario, Higgins’ tests are found to perform well overall with respect to Type I error rate and power. 相似文献
876.
Elke Loichinger Bernhard Hammer Alexia Prskawetz Michael Freiberger Joze Sambt 《Revue europeenne de demographie》2017,33(3):351-380
In this paper we compare several types of economic dependency ratios for a selection of European countries. These dependency ratios take into account not only the demographic structure of the population, but also the differences in age-specific economic behaviour such as labour market activity, income and consumption as well as age-specific public transfers. In selected simulations where we combine patterns of age-specific economic behaviour and transfers with population projections, we show that in all countries population ageing would lead to a pronounced increase in dependency ratios if present age-specific patterns were not to change. Our analysis of cross-country differences in economic dependency demonstrates that these differences are driven by both differences in age-specific economic behaviour and in the age composition of the populations. The choice of which dependency ratio to use in a specific policy context is determined by the nature of the question to be answered. The comparison of our various dependency ratios across countries gives insights into which strategies might be effective in mitigating the expected increase in economic dependency due to demographic change. 相似文献
877.
This study investigated the relationships between types of activity and quality of life (QOL) for older men and women at different ages. Based on cross-sectional data that included 220 community-dwelling elderly persons aged 65 and older in southern Taiwan, the results showed that the participation rates in many activities declined with age for both genders. Social activity and solitary leisure activity were significantly associated with QOL for old-old men, but not for young-old men. Only social activity was significantly associated with QOL for young-old women, but there was no significant association between any activity and QOL for old-old women. 相似文献
878.
Lawns are considered monocultures and lesser contributors to sustainability than diverse nature but are still a dominating green area feature and an important cultural phenomenon in cities. Lawns have esthetical values, provide playground, are potential habitat for species, contribute to carbon sequestration and water infiltration, but also increase pesticides, fertilization, are monocultures and costly to manage at the same time. To evaluate the potential impact of lawns, whether positive or negative, it is of interest to estimate the total lawn cover in cities and its change over time. This is not a straightforward process, e.g., because many lawns are small and covered by trees. In this study we review the existing literature of lawn cover in cities and the different methodologies used for cover estimation. We found both pros and cons with NDVI and LiDAR data as well as manually interpreted aerial photos. The total cover of lawns in three case study cities was estimated to 22.5%. By extrapolating these percentages to all Swedish cities lawn cover was estimated to 2589 km2 (0.6% of the terrestrial surface). The approximated total municipal management cost of lawns in all Swedish cities was 910,000,000 USD/ year. During 50 years lawn area almost doubled in relative cover and 56% of them were continuously managed. Since lawns constitute large parts of the urban greenery and are costly to manage it is highly relevant to consider their social, ecological and cultural value compared to alternatives, e.g., meadows with less intensive management. 相似文献
879.
880.
Sharmila Gamlath 《Social indicators research》2017,133(3):907-930
We examine the relationship between different aspects of human development and Hofstede’s six dimensions of national culture. Using multivariate regression and canonical correlation analysis, we show that all the dimensions of national culture except masculinity have a significant impact on human development, and that the overall strength of the association between the two groups of variables is a high positive one. In general, the direction of the influence of the national culture variables on economic growth differs from the manner they influence other variables, which reinforces the fact that economic growth does not always translate into true people-centred development. Furthermore, the national culture dimensions do not explain much of the variation in a number of health indicators. 相似文献