全文获取类型
收费全文 | 9275篇 |
免费 | 170篇 |
国内免费 | 3篇 |
专业分类
管理学 | 1139篇 |
民族学 | 50篇 |
人口学 | 883篇 |
丛书文集 | 43篇 |
教育普及 | 1篇 |
理论方法论 | 787篇 |
综合类 | 141篇 |
社会学 | 4190篇 |
统计学 | 2214篇 |
出版年
2023年 | 62篇 |
2021年 | 71篇 |
2020年 | 156篇 |
2019年 | 238篇 |
2018年 | 237篇 |
2017年 | 381篇 |
2016年 | 247篇 |
2015年 | 177篇 |
2014年 | 246篇 |
2013年 | 1663篇 |
2012年 | 293篇 |
2011年 | 256篇 |
2010年 | 196篇 |
2009年 | 210篇 |
2008年 | 229篇 |
2007年 | 204篇 |
2006年 | 217篇 |
2005年 | 176篇 |
2004年 | 177篇 |
2003年 | 132篇 |
2002年 | 180篇 |
2001年 | 214篇 |
2000年 | 191篇 |
1999年 | 210篇 |
1998年 | 173篇 |
1997年 | 149篇 |
1996年 | 148篇 |
1995年 | 140篇 |
1994年 | 114篇 |
1993年 | 142篇 |
1992年 | 152篇 |
1991年 | 163篇 |
1990年 | 150篇 |
1989年 | 134篇 |
1988年 | 102篇 |
1987年 | 106篇 |
1986年 | 109篇 |
1985年 | 128篇 |
1984年 | 117篇 |
1983年 | 107篇 |
1982年 | 80篇 |
1981年 | 72篇 |
1980年 | 76篇 |
1979年 | 92篇 |
1978年 | 73篇 |
1977年 | 58篇 |
1976年 | 54篇 |
1975年 | 51篇 |
1974年 | 61篇 |
1973年 | 47篇 |
排序方式: 共有9448条查询结果,搜索用时 0 毫秒
251.
Gary N. Marks 《The British journal of sociology》2020,71(5):898-901
This commentary critiques Betthäuser, Bourne and Bukodi's (2020) paper which finds that cognitive ability does not substantially mediate class of origin effects on educational and occupational outcomes. From these results, they conclude that cognitive ability is only of minor importance for social stratification, reasserting their view of the primacy of class origins for social stratification. The central issue surrounding cognitive ability in social stratification is its effects on socioeconomic attainments vis-à-vis socioeconomic origins, not the extent that cognitive ability mediates classorigin effects. Their analytical strategy of estimating the extent that cognitive ability mediates class origineffects is misleading because: it ignores the only moderate associations of socioeconomic origins with educational and occupational outcomes; the stronger direct effects of cognitive ability; the associations of parents’ ability with their own socioeconomic attainments; and the genetic transmission of cognitive ability and other traits relevant to social stratification from parents to their children. 相似文献
252.
253.
This study uses Lovejoy and Saxton's (2012) hierarchy of engagement to analyze how nonprofit human service organizations use Facebook and Twitter to engage stakeholders. Their framework has not been applied to this nonprofit subgroup, and most previous scholarship on this topic focuses on just one platform. We also contribute by drawing on organizational theory to better understand variation in the modes of engagement organizations emphasize. Based on our analysis, we add new subcategories to the hierarchy of engagement. In addition, we find that compared to other nonprofit subgroups examined in previous research, the organizations in our sample placed a greater emphasis on using social media messages to ask stakeholders to take action. We report only modest variations in how organizations were using Facebook and Twitter. Finally, according to our results, resource dependence and stewardship theories help explain the modes of engagement organizations prioritize. 相似文献
254.
Urban Ecosystems - Generalist wildlife species often thrive in urban environments because of increased anthropogenic resources. However, human-wildlife interactions, especially if negative, raise... 相似文献
255.
Urban Ecosystems - Critical resources for birds nesting in cities can support populations in spite of the challenges imposed by urbanization, and the identification of such resources can shed light... 相似文献
256.
Technology is pervasive in homes of families with young children, despite evidence for negative associations between infant exposure to screen‐based media and cognitive development that has led the American Academy of Pediatrics (AAP) to discourage parents from exposing children under the age of 18 months to any kind of screen time (AAP, 2016). Here, we apply a propensity score matching approach to estimate relations between electronic screen‐based media use in infancy and executive function in early toddlerhood. In an international sample of 416 firstborn infants, parental report of regular exposure to screen‐based media at 4 months predicted poorer performance on a test of inhibition at 14 months, but was unrelated to either cognitive flexibility or working memory at 14 months. Results of this study are therefore consistent with the view that early exposure to screen‐based media adversely affects the development of executive function. 相似文献
257.
Nagarajan N. Renuga Teixeira Aurora A. C. Silva Sandra T. 《Population research and policy review》2021,40(2):187-210
Population Research and Policy Review - The issue of population ageing is no longer exclusively centred on developed countries. Empirical studies have proven that the rise in the proportion of the... 相似文献
258.
Decisions to Outsource Information Systems Functions: Testing a Strategy-Theoretic Discrepancy Model
In recent years, the decision to outsource information systems (IS) functions has become a viable strategic alternative in managing the increasingly complex IS functions. In this study, the IS outsourcing phenomenon is conceptualized as a strategic decision in the organization. Drawing on resource-based theories, resource dependence theories, and other theories of strategic management, a discrepancy model of this decision is developed. Relationships between a number of strategy-theoretic factors and the IS outsourcing decision are hypothesized. These factors include IS resource performance discrepancies manifested in the form of gaps in information quality, IS support quality, IS cost effectiveness and financial performance, as well as the strategic orientation of the firm. Results of the study indicate that, while cost consideration and the firm's financial performance are not associated with the IS outsourcing decision, difficulties in providing good information outputs and IS support services are associated with the decision. Overall, the findings suggest that the current trend toward outsourcing represents a continuing evolution of the IS function as it attempts to fulfill its traditional mission of providing high quality information resource to the firm. When the performance of the delivered resource begins to slip in the current environment of rising expectation and technological complexity, outsourcing may become a strategic response of necessity. The paper concludes with a discussion of the implications of the results for practicing managers and suggestions for future research. 相似文献
259.
260.
Practitioners and researchers have long been interested in achieving the highest response rate within resource constraints on their mailed surveys. Achieving this high response rate typically has required the selection of the right mix of response-facilitating techniques. The selection decisions were generally made under the assumption that the response-facilitating techniques act independently of one another. The authors have examined the validity of this independence assumption by identifying the major response facilitators in use and then analyzing the results of 531 independent mail survey studies. The authors conclude that major facilitators do not function independently. In fact, it was found that significant joint action interactive effects on response rates do exist. Practitioners and researchers who are faced with the survey design decisions of choosing response facilitators can receive assistance by reviewing the results of this diverse collection of reported experiences. 相似文献