全文获取类型
收费全文 | 4882篇 |
免费 | 84篇 |
国内免费 | 19篇 |
专业分类
管理学 | 822篇 |
民族学 | 37篇 |
人才学 | 4篇 |
人口学 | 573篇 |
丛书文集 | 30篇 |
理论方法论 | 429篇 |
综合类 | 201篇 |
社会学 | 2204篇 |
统计学 | 685篇 |
出版年
2023年 | 25篇 |
2022年 | 12篇 |
2021年 | 15篇 |
2020年 | 59篇 |
2019年 | 94篇 |
2018年 | 103篇 |
2017年 | 152篇 |
2016年 | 174篇 |
2015年 | 102篇 |
2014年 | 94篇 |
2013年 | 524篇 |
2012年 | 276篇 |
2011年 | 219篇 |
2010年 | 120篇 |
2009年 | 103篇 |
2008年 | 132篇 |
2007年 | 103篇 |
2006年 | 122篇 |
2005年 | 674篇 |
2004年 | 369篇 |
2003年 | 241篇 |
2002年 | 130篇 |
2001年 | 150篇 |
2000年 | 83篇 |
1999年 | 64篇 |
1998年 | 61篇 |
1997年 | 33篇 |
1996年 | 34篇 |
1995年 | 28篇 |
1994年 | 50篇 |
1993年 | 45篇 |
1992年 | 38篇 |
1991年 | 52篇 |
1990年 | 41篇 |
1989年 | 36篇 |
1988年 | 36篇 |
1987年 | 34篇 |
1986年 | 25篇 |
1985年 | 45篇 |
1984年 | 41篇 |
1983年 | 28篇 |
1982年 | 31篇 |
1981年 | 20篇 |
1980年 | 15篇 |
1979年 | 15篇 |
1978年 | 17篇 |
1977年 | 17篇 |
1976年 | 16篇 |
1975年 | 14篇 |
1974年 | 16篇 |
排序方式: 共有4985条查询结果,搜索用时 0 毫秒
101.
102.
Paul Clist 《Development policy review : the journal of the Overseas Development Institute》2016,34(3):365-383
There are influential studies that argue that foreign aid displaces domestic tax revenue when it is given in the form of grants. These claims are based on data that are deeply problematic: several different sources are amalgamated into one dataset, with no apparent checks on compatibility. In this article, a variety of econometric strategies are used to overcome these issues of data quality. The resulting weight of evidence points to a modest but positive effect on the part of foreign aid generally on domestic tax revenue. Fears over a negative effect for aid grants appear unwarranted, and are accounted for by the inappropriate use of data or endogeneity issues. 相似文献
103.
Cecilia?RosselEmail author 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2016,27(1):146-165
This paper analyzes some aspects of the third sector’s involvement process in the provision of public social services. Using evidence garnered in previous research based on in-depth interviews, I offer elements toward an assessment of the consequences this process has produced not only in terms of the gains and losses it has produced for social policy, but also for the very identity and constitutive characteristics of the third sector. The evidence hereby compiled strengthens skepticism toward the hypothesis that sees a transformative potential in the role of the third sector in social policy in Latin America. This skepticism arises from issues detected by involved actors themselves and that are linked to the weakness of the sector as a whole. 相似文献
104.
Jenna?T.?Hayes Angela?VanBrackle Madeleine?Sigman-Grant All Kids? Obesity Resiliency Research Team 《Journal of Family and Economic Issues》2016,37(2):172-181
As maternal BMI is a risk factor for higher child BMI, this exploratory study investigated perceived economic strain as a protective factor modifying this well-established relationship. Primary low-income female caregivers (n = 432) of preschoolers ages 3–5 years were interviewed using the Family Economic Strain Scale. Caregiver and child heights and weights were measured. Significant differences were found in perceived economic strain between normal versus underweight, overweight, and obese caregivers. A moderating effect approaching significance was noted such that at low levels of reported economic strain, caregiver BMI classification had no effect on child BMI z-score for normal weight, overweight, or obese caregivers. This study is the first to demonstrate that reduced perception of economic strain may act to buffer the impact of maternal overweight/obesity on child weight status. Given this biologically strong relationship, the potential for any modifiable factor to be detected is encouraging. Further collaborative research between economists and family resiliency researchers is suggested. 相似文献
105.
Households with limited income and wealth often struggle to access the financial liquidity needed to address unexpected expenses or income drops. Emergency savings can act as form of insurance against such economic shocks and reduce the risk of hardships that influence family wellbeing. Prior research has established that threshold amounts of liquid assets can reduce the risk of economic hardship. This study used a measure of self-reported emergency saving behavior to examine whether households who reported saving for emergencies were less likely to experience subsequent economic hardships in a longitudinal sample of households in disadvantaged neighborhoods from the Annie E. Casey Foundation’s Making Connections project. Results across a range of regression models suggest that households who saved for emergencies experienced slightly less overall hardship and were less likely to report several specific hardships, such as food insecurity and having a phone disconnected, three years later. This study supports the idea that small, unrestricted savings may play a protective role for low-income households. 相似文献
106.
107.
We use genetic algorithms (GA) to solve the assembly line balancing (ALB) problem. Inparticular, we show how this technique can be used to generate feasible line balances, improve upon solutions obtained by other heuristics reported in the literature, and utilizeany one or more evaluation criteria that can be expressed in functional form. The procedure is demonstrated with two examples: (1) intimating the improvement of heuristic-generated ALB solutions by including them in the GA initial population, and (2) the possibility of balancing assembly lines with multiple criteria and side constraints. These examples suggest that GA can be a powerful tool in ALB. To investigate the utility of GA on single-criterion problems, an experiment is conducted that compares both the GA approach and conventional heuristics. Results indicate that the GA solutions are significantly improved over the heuristic solutions under the conditions studied. It is also found that the presence of heuristic-generated conventional solutions in the GA initial population leads to statistically preferred results. 相似文献
108.
In this article, we study how an expert system affects novice problem solving in a financial risk analysis domain. We demonstrate that novice performance is improved after exposure to an expert system. Further, we show that novice performance continues to improve when the system is withdrawn. By comparing learning curves for people with exposure to those without, we can assess how much the system has benefitted its users. We demonstrate a quantitative methodology to measure the increment of learning due to the use of an information technology. We also explore the issue of how expertise is transferred from the system to the user. 相似文献
109.
110.
Upon reviewing the extant literature on determinants of unionism, it becomes clear that many areas that have had a plethora
of research attention do not converge upon singularly directional findings. This study explores a potential cause of such
an apparent anomaly: nonlinearity of data. An exploratory examination of correlation coefficients among typical union determinant
variables seems to show different patterns of relationships at different levels of union demand. Thus, a break from traditional
linear data analysis techniques is explored in the interest of explaining more variance with typical, theoretically derived
variables by using neural network analysis. Results of analyses on industry level data reveal that using neural network analysis
to model union demand explained over four times as much variance as multiple regression analysis. 相似文献