全文获取类型
收费全文 | 27200篇 |
免费 | 551篇 |
专业分类
各国政治 | 1103篇 |
工人农民 | 1656篇 |
世界政治 | 1857篇 |
外交国际关系 | 1022篇 |
法律 | 15515篇 |
中国共产党 | 2篇 |
中国政治 | 86篇 |
政治理论 | 6264篇 |
综合类 | 246篇 |
出版年
2021年 | 103篇 |
2020年 | 251篇 |
2019年 | 296篇 |
2018年 | 1598篇 |
2017年 | 1567篇 |
2016年 | 1460篇 |
2015年 | 394篇 |
2014年 | 403篇 |
2013年 | 2074篇 |
2012年 | 656篇 |
2011年 | 1349篇 |
2010年 | 1329篇 |
2009年 | 979篇 |
2008年 | 1210篇 |
2007年 | 1195篇 |
2006年 | 503篇 |
2005年 | 531篇 |
2004年 | 636篇 |
2003年 | 614篇 |
2002年 | 471篇 |
2001年 | 748篇 |
2000年 | 685篇 |
1999年 | 556篇 |
1998年 | 337篇 |
1997年 | 293篇 |
1996年 | 268篇 |
1995年 | 270篇 |
1994年 | 305篇 |
1993年 | 250篇 |
1992年 | 372篇 |
1991年 | 406篇 |
1990年 | 366篇 |
1989年 | 379篇 |
1988年 | 344篇 |
1987年 | 347篇 |
1986年 | 357篇 |
1985年 | 351篇 |
1984年 | 316篇 |
1983年 | 342篇 |
1982年 | 284篇 |
1981年 | 273篇 |
1980年 | 205篇 |
1979年 | 262篇 |
1978年 | 184篇 |
1977年 | 162篇 |
1976年 | 137篇 |
1975年 | 131篇 |
1974年 | 145篇 |
1973年 | 123篇 |
1972年 | 116篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
Adam M. Auerbach Adrienne LeBas Alison E. Post Rebecca Weitz-Shapiro 《Studies in Comparative International Development (SCID)》2018,53(3):261-280
Contemporary urbanization in the Global South merits greater attention from scholars of comparative politics. Governance, associational life, and political behavior take distinctive forms in the social and institutional environments created by rapid urbanization, particularly within informal settlements and labor markets. In this special issue, we examine forms of collective action and claims-making in these spaces. We also consider how the state assesses, maps, and responds to the demands of informal sector actors. Tackling questions of citizen and state behavior in these informal urban contexts requires innovative research strategies due to data scarcity and social and institutional complexity. Contributors to this symposium offer novel strategies for addressing these challenges, including the use of informal archives, worksite-based sampling, ethnographic survey design, enforcement process-tracing, and crowd-sourced data. 相似文献
992.
Zophia Edwards 《Studies in Comparative International Development (SCID)》2018,53(4):477-499
Development sociologists generally agree that states play a critical role in promoting, as well as in impeding, development. However, far less scholarly consensus exists on the precise historical processes that lead either to strong or to weak states. This paper investigates the factors that shape varied state capacities through a comparative-historical analysis of two similar countries with divergent development outcomes—Trinidad and Tobago and Gabon. In the 1960s, both countries had comparably large amounts of oil wealth, minimal state involvement in the economy, and low levels of development. In the 1970s, state capacity in Trinidad and Tobago dramatically increased and the country went on to achieve high levels of development. The Gabonese state, on the other hand, remained weak resulting in persistent low levels of development. This paper traces the divergence in state capacity to variations in working class mobilization, specifically the particular type of working class movements in each country and the political opportunity contexts. In doing so, this paper reveals new agents and contingencies producing state capacity that are not predominantly discussed in the contemporary development literature, and the meso-level mechanics by which these agents are successful or constrained in doing so. 相似文献
993.
994.
995.
Christopher C. Weiss Brian V. Carolan E. Christine Baker-Smith 《Journal of youth and adolescence》2010,39(2):163-176
In an effort to increase both adolescents’ engagement with school and academic achievement, school districts across the United
States have created small high schools. However, despite the widespread adoption of size reduction reforms, relatively little
is known about the relationship between size, engagement and outcomes in high school. In response, this article employs a
composite measure of engagement that combines organizational, sociological, and psychological theories. We use this composite
measure with the most recent nationally-representative dataset of tenth graders, Educational Longitudinal Study: 2002, (N = 10,946, 46% female) to better assess a generalizable relationship among school engagement, mathematics achievement and
school size with specific focus on cohort size. Findings confirm these measures to be highly related to student engagement.
Furthermore, results derived from multilevel regression analysis indicate that, as with school size, moderately sized cohorts
or grade-level groups provide the greatest engagement advantage for all students and that there are potentially harmful changes
when cohorts grow beyond 400 students. However, it is important to note that each group size affects different students differently,
eliminating the ability to prescribe an ideal cohort or school size. 相似文献
996.
James J. Mazza Charles B. Fleming Robert D. Abbott Kevin P. Haggerty Richard F. Catalano 《Journal of youth and adolescence》2010,39(6):579-593
Few studies have examined risk factors of childhood and early adolescent depressive symptomatology trajectories. This study
examined self-report depressive symptomatology across a 6-year time period from 2nd to 8th grade to identify latent groups
of individuals with similar patterns of depressive phenomena in a sample of 951 children (440 girls, 511 boys). Analyses,
using semiparametric group modeling (SGM), identified 5 trajectory groups for girls and boys: low depressed stables, low depressed
risers, mildly depressed stables, moderately depressed changers, and moderately depressed risers. Individual risk factors,
with the exception of shy/withdrawn behavior, were significantly different across trajectory group membership for boys and
girls, as was low-income status for boys. Boys in the low depressed and mildly depressed stable trajectory groups had significantly
higher levels of antisocial behavior, attention problems, and lower social competency compared to girls in similar groups.
These results suggest that universal prevention programs implemented in early elementary school that target selected risk
factors may be helpful in reducing future adolescent mental health problems, specifically depressive symptomatology. 相似文献
997.
Nicole Leeper Piquero Kristan Fox Alex R. Piquero George Capowich Paul Mazerolle 《Journal of youth and adolescence》2010,39(4):380-392
Much of the prior work on General Strain Theory (GST) has focused on how strain and negative emotions interrelate to produce
criminal—especially violent—activity. Very little research has extended GST to examine other types of non-criminal, negative
behavior, such as self-harming behaviors associated with disordered eating, a traditionally female-specific self-directed
outcome. Using a sample of 338 young adults (54% female, 95% white), this article applies GST to disordered eating by examining
how strain and negative emotions relate to this particular outcome across gender. Findings indicate that two types of strain
measures predict depressive symptoms among males and females, that inequitable strainful experiences relate to disordered
eating among females but not males, that depressive symptoms but not anger increase disordered eating for both males and females,
and that membership in Greek organizations (sororities or fraternities) is associated with disordered eating but only for
males. Implications for theory and directions for future research are highlighted. 相似文献
998.
999.
1000.
Esther S. Chang Jutta Heckhausen Ellen Greenberger Chuansheng Chen 《Journal of youth and adolescence》2010,39(11):1293-1304
This study proposed and confirmed three ways in which college students can perceive shared agency and two ways in which they can perceive non-shared agency with parents when pursuing educational goals in college. Differences and similarities were examined among participants
from four ethnic backgrounds (N = 515; 67% female): East Asian American, Southeast Asian American, Filipino/Pacific Islander American, and European American.
Results indicated that Asian American youth reported higher levels of non-shared agency with parents (i.e., parental directing
and noninvolvement), lower levels of shared agency (i.e., parental accommodation, support, or collaboration), and poorer college
adjustment compared to European Americans. However, ethnic similarities were found whereby perceived shared agency in education
with parents was associated with college adjustment. Multiple mediation analyses also indicated that our model of shared and
non-shared agency with parents explained differences in college adjustment between Asian and European Americans, though more
strongly for comparisons between European and East Asian Americans. Our results suggest that parents continue to be important
in the education of older youth but that continued directing of youth’s education in college can be maladaptive. 相似文献