全文获取类型
收费全文 | 20946篇 |
免费 | 450篇 |
国内免费 | 1篇 |
专业分类
管理学 | 2705篇 |
民族学 | 123篇 |
人口学 | 1864篇 |
丛书文集 | 79篇 |
教育普及 | 1篇 |
理论方法论 | 1916篇 |
综合类 | 200篇 |
社会学 | 10666篇 |
统计学 | 3843篇 |
出版年
2023年 | 145篇 |
2022年 | 99篇 |
2021年 | 147篇 |
2020年 | 373篇 |
2019年 | 556篇 |
2018年 | 668篇 |
2017年 | 855篇 |
2016年 | 664篇 |
2015年 | 453篇 |
2014年 | 611篇 |
2013年 | 3726篇 |
2012年 | 779篇 |
2011年 | 733篇 |
2010年 | 530篇 |
2009年 | 435篇 |
2008年 | 574篇 |
2007年 | 522篇 |
2006年 | 562篇 |
2005年 | 451篇 |
2004年 | 453篇 |
2003年 | 384篇 |
2002年 | 393篇 |
2001年 | 499篇 |
2000年 | 429篇 |
1999年 | 423篇 |
1998年 | 325篇 |
1997年 | 280篇 |
1996年 | 297篇 |
1995年 | 301篇 |
1994年 | 265篇 |
1993年 | 267篇 |
1992年 | 314篇 |
1991年 | 301篇 |
1990年 | 298篇 |
1989年 | 256篇 |
1988年 | 248篇 |
1987年 | 209篇 |
1986年 | 236篇 |
1985年 | 255篇 |
1984年 | 223篇 |
1983年 | 196篇 |
1982年 | 164篇 |
1981年 | 135篇 |
1980年 | 160篇 |
1979年 | 176篇 |
1978年 | 136篇 |
1977年 | 117篇 |
1976年 | 89篇 |
1975年 | 93篇 |
1974年 | 93篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
971.
About 50?years ago, Efron noted some counterintuitive properties of the long-term behavior of contests involving dice. For instance, consider the 6-sided dice whose sides are labeled (4,4,4,4,0,0), (3,3,3,3,3,3), (6,6,2,2,2,2), and (5,5,5,1,1,1). Each die has a 2/3 probability of rolling a higher number than the next one in the list and the last has the same 2/3 probability of rolling a higher number than the first. The non-transitivity of games involving non-identical dice was popularized by Gardner (Sci Am, 223:110–114, 1970). Although Gardner and other authors have observed that non-transitive dice serve to illustrate the complexities of the theory of voting, it does not seem that much attention has been paid to the corresponding voting system. Our purpose in this article is to present this voting system and compare its properties with those of other voting systems. One of the most interesting properties is the fact that cancellation with respect to the Efron dice voting system can replace cancellation with respect to pairwise preferences in Young’s characterization of the social choice function associated with the Borda Count. 相似文献
972.
Do home foreclosures and short sales equally affect neighbors? On average, no‐default homes sell anytime up to 6 months after sales of foreclosed neighbors suffer a cumulative spillover effect of about 10%. Including the market trend, the total effect increases to 40%. Controlling for foreclosure effects, short sales do not produce additional spillover effects. We apply a modified hedonic model to estimate spillover effects on neighbors, using January 2008 to June 2009 home transactions from one of the most impacted housing markets. Our findings apply to severely “thin” markets and may not be true for stable markets. We show that accurate estimates of spillover effects require correcting for the market trend, two types of time and spatial price interdependence, and the endogenous neighborhood price. (JEL R21, R22, R31, K2) 相似文献
973.
This paper uses national longitudinal data and several new empirical strategies to examine the consequences of teenage fatherhood. The key contribution is to compare economic outcomes of young fathers to young men whose partners experienced a miscarriage rather than a live birth. The results suggest that teenage fatherhood decreases years of schooling and the likelihood of receiving a high school diploma and increases general educational development receipt. Teenage fatherhood also appears to increase early marriage and cohabitation, and has mixed short-term effects on several labor market outcomes. 相似文献
974.
SM Walling JC Meehan AD Marshall A Holtzworth-Munroe CT Taft 《Journal of marital and family therapy》2012,38(3):471-485
Measures of head injury, executive functioning, and intelligence were given to a community sample composed of 102 male perpetrators of intimate partner aggression (IPA) and 62 nonaggressive men. A history of head injury and lower mean score on a measure of verbal intelligence were associated with the frequency of male-perpetrated physical IPA as reported by male perpetrators and their female partners. Lower mean scores on a measure of verbal intelligence also predicted frequency of psychological IPA perpetration. Using the perpetrator subtypes outlined by Holtzworth-Munroe et al. (2000), analyses revealed that compared with other groups, the most severely aggressive subtypes (i.e., borderline-dysphoric and generally violent-antisocial) were the most likely to report a history of head injury and to have significantly lower mean scores on a neuropsychological test of verbal intelligence. The possible role of neuropsychological factors in IPA perpetration and implications for prevention and intervention programs are discussed. 相似文献
975.
Jason M. Fletcher 《Journal of Labor Research》2012,33(1):49-75
In this paper, we use a longitudinal survey that has collected information for 50 years on a large cohort of Wisconsin high
school graduates and their siblings to examine the long term impact of early occupational choice on health status. We find
evidence that beginning a career in a blue collar occupation is correlated with several measures of poor health outcomes at
ages 50–65. Since our dataset includes usually unobserved pre-labor market characteristics, including IQ and childhood health
status, we can show that controlling for these variables is important for many results and suggests a high level of selection
into occupation based on health and ability. We also provide evidence of gender differentials in the association between first
occupation and later health. Then, we replace our basic measure of occupational categories with summary measures of job characteristics
and find that employment at “bad jobs” at the beginning of an individual’s career predicts later health outcomes. Finally,
we use sibling information in the dataset to show that unmeasured family background factors explain a large share of the effects
of occupation on later health. Overall, the evidence points to limited, though heterogeneous, long term effects of health
from blue collar employment. 相似文献
976.
The role of subsequent school contexts in the long-term effects of early childhood interventions has received increasing attention, but has been understudied in the literature. Using data from the Chicago School Readiness Project (CSRP), a cluster-randomized controlled trial conducted in Head Start programs, we investigate whether the intervention had differential effects on academic and behavioral outcomes in kindergarten if children attended high- or low-performing schools subsequent to the preschool intervention year. To address the issue of selection bias, we adopt an innovative method, principal score matching, and control for a set of child, mother, and classroom covariates. We find that exposure to the CSRP intervention in the Head Start year had significant effects on academic and behavioral outcomes in kindergarten for children who subsequently attended high-performing schools, but no significant effects on children attending low-performing schools. Policy implications of the findings are discussed. 相似文献
977.
978.
Asia M. Friedman 《Symbolic Interaction》2012,35(3):284-300
Vision plays a privileged role in social interaction and the construction of intersubjective reality. Given that one of sociology's tasks is to problematize the taken for granted, research that examines rarely foregrounded non‐visual modes of sensory perception is a powerful resource. This article draws on twenty‐seven interviews that explore blind people's perceptions of male and female bodies. I highlight several distinctive features of non‐visual sex attribution (salience, speed, and diachronicity), and argue that conceptions of sex as “self‐evident” primarily reflect visual perception. These findings suggest the need to explore the sociology of perception as a new approach to the sociology of the body, and more broadly highlight the role of sensory perception in the social construction of reality. 相似文献
979.
Potential of decentralized wastewater management for urban development: Case of Bangkok 总被引:1,自引:0,他引:1
Decentralized wastewater management (DWWM) has recently gained much attention in wastewater management (WWM) due to its build-as-you-go principal. Rapid urban development and the widespread impact of wastewater require sustainable ways to test the DWWM approach. This paper aims to examine and discuss the potential of Bangkok’s current WWM approaches for urban development, focusing on decentralized management approaches. General WWM approaches were examined using case study research methods. Three WWM cases were selected for detailed investigation. Residential wastewater user surveys and expert interviews were used to support system performance findings of service providers and recipients, as well as to draw lessons learned. Results show that DWWM is economically and technically efficient, demonstrating potential for sustainable urban development (SUD) in the study area. The competitive cost found is a result of less sewer line, simple technology, and limited additional costs, while the high efficiency is a result of good operation and maintenance. Also the reclaimed water has been used for landscape irrigation of the urban greenery. Sustainability of the system lies in social value of public amenity it provides, and the urban planning implication that it could be an option for smart growth. The results also show that even in an inner urban area DWWM does not conflict with any SUD considerations. Thus, the study recommends using DWWM for new development within both public and private properties based on Bangkok’s case as part of long-term urban development. 相似文献
980.
Michael Gordon Kevin M. AntshelLawrence Lewandowski 《Children and youth services review》2012,34(1):213-217
We present data on predictors of treatment outcome for 3200 consecutive referrals to a child and adolescent psychiatry clinic. Using Reliable Change Index (RCI) methodology, we divided children into those who, between intake and discharge, improved, stayed the same, or got worse according to clinician-rated impairment. Most predictors of improvement were related to parent variables (marital status, maternal anxiety, and ethnicity), while those associated with deterioration were tied to child status (extent of psychiatric comorbidity, history of placement in a self-contained classroom, and a prior trial of psychotropic medications). The implications of these findings for data-driven program development, clinic management, treatment planning, and systems of care are discussed. 相似文献