全文获取类型
收费全文 | 10893篇 |
免费 | 201篇 |
国内免费 | 2篇 |
专业分类
管理学 | 1511篇 |
民族学 | 67篇 |
人才学 | 3篇 |
人口学 | 968篇 |
丛书文集 | 70篇 |
理论方法论 | 1102篇 |
综合类 | 226篇 |
社会学 | 5556篇 |
统计学 | 1593篇 |
出版年
2020年 | 157篇 |
2019年 | 255篇 |
2018年 | 267篇 |
2017年 | 378篇 |
2016年 | 266篇 |
2015年 | 200篇 |
2014年 | 255篇 |
2013年 | 1753篇 |
2012年 | 357篇 |
2011年 | 343篇 |
2010年 | 277篇 |
2009年 | 266篇 |
2008年 | 254篇 |
2007年 | 296篇 |
2006年 | 265篇 |
2005年 | 268篇 |
2004年 | 248篇 |
2003年 | 183篇 |
2002年 | 217篇 |
2001年 | 277篇 |
2000年 | 232篇 |
1999年 | 214篇 |
1998年 | 171篇 |
1997年 | 159篇 |
1996年 | 158篇 |
1995年 | 144篇 |
1994年 | 152篇 |
1993年 | 151篇 |
1992年 | 151篇 |
1991年 | 149篇 |
1990年 | 154篇 |
1989年 | 148篇 |
1988年 | 134篇 |
1987年 | 150篇 |
1986年 | 118篇 |
1985年 | 147篇 |
1984年 | 156篇 |
1983年 | 142篇 |
1982年 | 123篇 |
1981年 | 90篇 |
1980年 | 112篇 |
1979年 | 113篇 |
1978年 | 103篇 |
1977年 | 87篇 |
1976年 | 88篇 |
1975年 | 100篇 |
1974年 | 96篇 |
1973年 | 69篇 |
1972年 | 61篇 |
1971年 | 54篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
461.
This paper presents a two-equation model of joint outcomes on an individual’s decision to binge drink and on his/her annual
labor market earnings. The primary data source is the 1979 cohort of the National Longitudinal Survey of Youth (NLSY79), 1979–1994.
We show that binge drinking behavior is quite alcohol-price responsive and is a rational addiction. A new result is that an
individual’s decision to binge drink has a statistically significant negative effect on his/her earnings. Furthermore, we
conducted simulations of the short-run and long-run impacts of increasing the alcohol price. They showed that the tendency
for an individual to binge drink heavily is reduced significantly, and the reduction is greater in the long-run than short-run
simulation. Also, an individual's annual earnings were increased. However, in the structural model, an individual’s earnings
have no significant effect on his/her tendency to engage in binge drinking. Our results contradict earlier findings from cross-section
evidence that showed increased alcohol consumption raised an individual’s earnings or wages. 相似文献
462.
The effects of maternal responsiveness on infant responsiveness and behavior in the Still‐Face Task were longitudinally examined through infants' first 3 months. Maternal vocal responsiveness and infant vocal and smiling responsiveness significantly increased when infants were 2 months of age. Mothers showed continuity of individual differences in vocal responsiveness from the infants' newborn period. Maternal responsiveness predicted infant responsiveness within and across sessions. Compared with infants with low‐responsive mothers, infants with high‐responsive mothers were more attentive and affectively engaged during the Still‐Face Task from 1 month of age. Infants with high‐responsive mothers discriminated between the task phases with their smiling at 1 month, a month before infants with low‐responsive mothers did so. Infants in both groups discriminated between the phases with their attention and nondistress vocalizations throughout their first 3 months. Results suggest that maternal responsiveness influences infant responsiveness and facilitates infants' engagement and expectations for social interaction. 相似文献
463.
Gary S. DeFraia George O. Lamb Stacie E. Resnick Toni D. McClure 《Social Work in Mental Health》2014,12(5-6):523-543
Multiple deployments, a prominent characteristic of operations Enduring Freedom, Iraqi Freedom, and New Dawn, have been linked to increased risk for various mental health conditions. It is also well known that military transitions, such as a change of duty station or discharge, are an inevitable part of military life. While military transitions can be stressful for any service member or veteran, those with mental health conditions face additional challenges. Transition stress can exacerbate a mental health condition that in turn hinders ability to manage the transition, resulting in a cycle of stress. As a result, those receiving mental health care while transitioning often experience difficulty continuing treatment post-transition. This article describes a unique and innovative transition coaching program designed to address this emerging issue. 相似文献
464.
Recent research has revealed the important role of multimodal object exploration in infants' cognitive and social development. Yet, the real‐time effects of postural position on infants' object exploration have been largely ignored. In the current study, 5‐ to 7‐month‐old infants (N = 29) handled objects while placed in supported sitting, supine, and prone postures, and their spontaneous exploratory behaviors were observed. Infants produced more manual, oral, and visual exploration in sitting compared to lying supine and prone. Moreover, while sitting, infants more often coupled manual exploration with mouthing and visual examination. Infants' opportunities for learning from object exploration are embedded within a real‐time postural context that constrains the quantity and quality of exploratory behavior. 相似文献
465.
We study postpartum decisions about paid work and breastfeeding using a simultaneous equations model. For our sample of higher socioeconomic status mothers, we find a joint decision process for three sets of decisions modeled: work leave duration and duration of any, as well as of exclusive, breastfeeding, and daily work hours and daily breastfeedings at infant age 3 months. We find that returning to paid work 1 week earlier reduces any breastfeeding duration by about two-thirds of a week while extending breastfeeding by a week delays work participation by about one-third of a week. We find larger elasticities for decisions involving daily work hours and number of breastfeedings at 3 months than for work leave duration and any breastfeeding duration and the smallest elasticities for duration of exclusive breastfeeding and work leave. This marks the first study to find a joint decision-making process for postpartum work and breastfeeding decisions and suggests that, in addition to increased leave impacting breastfeeding behaviors, successful breastfeeding promotion policies can have nontrivial impacts on the US labor market. 相似文献
466.
467.
468.
Elissa E. Madden Amy Chanmugam Ruth G. McRoy Laura Kaufman Susan Ayers-Lopez Mary Boo Kathleen J. Ledesma 《Child and Adolescent Social Work Journal》2016,33(6):523-534
This paper reports the results of a quantitative 42-item survey that explored foster, adoptive, and kinship parents’ (N = 160) utilization of different types of respite services (formal, informal, and a mixture of formal and informal), as well as their impressions of the impact of respite care on aspects of their lives related to family cohesion and stability, caring for their children, and their personal wellbeing. An exploratory cross-sectional, survey design was used to assess both the formal and informal respite care experiences of the foster, adoptive, and kinship caregivers. Two-tailed Fisher’s exact tests were used to examine the relationship between the type of respite received and caregivers’ respite experiences. Findings indicated that parent experiences differed depending on the type of respite services they received. Specifically, parents who used a mixture of formal and informal respite reported positive experiences related to respite more frequently than the other two types of respite groups, while those who received only informal respite reported less benefit than others. Parents who used formal respite (either alone or mixed with informal respite) reported greater stress reduction. The greatest increase in family stability was reported by parents who received a mix of informal and formal respite. While this study revealed clear benefits for families to using both informal and formal respite services, the findings suggest that formal respite care was helpful to parents regardless of whether used alone or in combination with informal care. 相似文献
469.
Jill E. Yavorsky 《Sociological Forum》2016,31(4):948-969
This article responds to calls to better understand how intersecting “inequality regimes” operate in organizations. Through in‐depth interviews with 25 white trans women about their workplace experiences, my analyses highlight how trans women navigate relational practices that are simultaneously gendered and cisgendered—that is, practices that maintain cultural connections between sex and gender and maintain gender as immutable. Findings demarcate three distinct mechanisms by which cisgenderism, a system that devalues women and trans people, operates and strengthens hierarchical privileges at work: (1) double‐bind constraints; (2) fluid biases of cissexism and sexism; and (3) group practices of privilege and subordination. In the first regard, analyses reveal unique double binds that trans women face—binds that dictate contradictory feminine and masculine ideal worker expectations but also expectations of gender authenticity. Second, I find that trans women often hover between two subordinate statuses (i.e., gender and transgender status) in a given workday, a fact that prods a more fluid conception of cisgenderism. Finally, this study highlights how cis men collectively mobilize through group practices to repair cisgender system breaches. All three dimensions are critical for understanding the production of workplace inequality between not only trans women and cis men, but all feminine‐identified workers. 相似文献
470.
Michael D. Denkinger Simone E. Flick Thorsten Nikolaus Clemens Becker Kamiar Aminian Ulrich Lindemann 《European review of aging and physical activity》2014,11(2):133-139
Increased physical activity is positively associated with better health in community-dwelling older persons. It is unclear whether physical activity also influences success of inpatient rehabilitation. For the assessment of physical activity in inpatient rehabilitation the Physical Activity in Inpatient Rehabilitation Assessment (PAIR), a short questionnaire based on five questions, was developed and preliminary validated. In this study, the PAIR was validated against a sensor-based physical activity measurement. Seventy functionally impaired and cognitively mostly intact patients of a German geriatric inpatient rehabilitation clinic who had undergone hip surgery (n?=?62 women, median age?=?83 years) participated. Physical activity was measured using the PAIR and a sensor-based activity monitor (Physilog ®; BioAGM, CH). Assessments were conducted at admission (T1) and 2 weeks later (T2) during the rehabilitation process. To assess concurrent and predictive validity, Spearman correlations and linear regression models were calculated using sensor-based walking activity and uptime activity (walking and standing time) as dependent variables. Criterion-related concurrent validity using physical activity sensors was weak to moderate. Correlations were slightly higher at T2 (r?=?0.45-0.53) than at T1 (r?=?0.44-0.46). The objectively measured variance of physical activity, explained by the PAIR, ranged from 25 to 43 %. PAIR activity scores and sensor-based walking or total activity increased in a dose-dependent manner, confirming the scoring system of the PAIR. The application time was usually less than 2 min. The validity of the PAIR is weak to moderate when compared to a sensor-based activity monitor and comparable to existing physical activity assessments for community-dwelling older adults. 相似文献