全文获取类型
收费全文 | 926篇 |
免费 | 57篇 |
专业分类
各国政治 | 58篇 |
工人农民 | 44篇 |
世界政治 | 58篇 |
外交国际关系 | 71篇 |
法律 | 387篇 |
中国政治 | 12篇 |
政治理论 | 341篇 |
综合类 | 12篇 |
出版年
2023年 | 9篇 |
2022年 | 5篇 |
2021年 | 8篇 |
2020年 | 25篇 |
2019年 | 26篇 |
2018年 | 31篇 |
2017年 | 36篇 |
2016年 | 50篇 |
2015年 | 26篇 |
2014年 | 39篇 |
2013年 | 128篇 |
2012年 | 36篇 |
2011年 | 36篇 |
2010年 | 28篇 |
2009年 | 28篇 |
2008年 | 22篇 |
2007年 | 26篇 |
2006年 | 42篇 |
2005年 | 38篇 |
2004年 | 29篇 |
2003年 | 38篇 |
2002年 | 35篇 |
2001年 | 21篇 |
2000年 | 16篇 |
1999年 | 14篇 |
1998年 | 16篇 |
1997年 | 19篇 |
1996年 | 4篇 |
1995年 | 9篇 |
1994年 | 6篇 |
1993年 | 14篇 |
1992年 | 4篇 |
1991年 | 8篇 |
1990年 | 9篇 |
1989年 | 8篇 |
1988年 | 8篇 |
1987年 | 4篇 |
1986年 | 7篇 |
1985年 | 11篇 |
1983年 | 5篇 |
1981年 | 6篇 |
1980年 | 7篇 |
1979年 | 6篇 |
1978年 | 7篇 |
1977年 | 6篇 |
1976年 | 3篇 |
1975年 | 4篇 |
1974年 | 4篇 |
1973年 | 4篇 |
1972年 | 3篇 |
排序方式: 共有983条查询结果,搜索用时 31 毫秒
721.
722.
AbstractAgricultural interventions are thought to have the potential to improve nutrition, but little rigorous evidence is available about programmes that link the two. In this article, we study impacts of an integrated agricultural and nutritional biofortification project, the REU in Mozambique. We first provide evidence on dietary impacts of the programme and then examine impacts of the programme by participation intensity. Using OLS and IV techniques, we find that more intense participation in both project components led to larger impacts. The results therefore have important implications for refining the design of future projects attempting to link agricultural and nutrition interventions. 相似文献
723.
Barbara Patrick Gregory K. Plagens Aaron Rollins Elizabeth Evans 《Public Performance & Management Review》2018,41(3):544-571
ABSTRACTOutcome based policies promote the use performance accountability models. However, the impact these policies have on the ethical culture of public sector organizations has not been adequately assessed. This research examines performance accountability reforms by examining the City of Atlanta’s implementation of federal and state performance policies. The analysis reveals the use of performance models in vulnerable organizations negatively impact employees’ ethical behavior. Teachers and administrators altered test results, delivered threats, misled parents and students about performance outcomes, and were dishonest with state investigators to give the illusion that performance goals had been met or exceeded. 相似文献
724.
RegData: A numerical database on industry‐specific regulations for all United States industries and federal regulations, 1997–2012 下载免费PDF全文
We introduce RegData, formerly known as the Industry‐specific Regulatory Constraint Database. RegData annually quantifies federal regulations by industry and regulatory agency for all federal regulations from 1997–2012. The quantification of regulations at the industry level for all industries is without precedent. RegData measures regulation for industries at the two, three, and four‐digit levels of the North American Industry Classification System. We created this database using text analysis to count binding constraints in the wording of regulations, as codified in the Code of Federal Regulations, and to measure the applicability of regulatory text to different industries. We validate our measures of regulation by examining known episodes of regulatory growth and deregulation, as well as by comparing our measures to an existing, cross‐sectional measure of regulation. Researchers can use this database to study the determinants of industry regulations and to study regulations’ effects on a massive array of dependent variables, both across industries and time. 相似文献
725.
Patrick F. Larue 《Democracy and Security》2017,13(1):71-95
The role of the courts is quite important, especially in the protection of individual rights and liberties. Many counter-terrorism policies implemented at the national level often infringe on these rights, and courts are the best line of defense against these violations of liberty. However, courts do not always rule in favor of liberty, sometimes ruling in favor of a strict government policy. This analysis seeks to explain the conditions that may lead courts to rule in favor of, or against, the government, arguing that political fragmentation is a potentially key factor in determining when particular case outcomes occur. 相似文献
726.
Patrick R. Rabiega 《Communicatio》2017,43(1):37-57
The visual stylistic elements of graffiti are increasingly being used in the commercial world of advertising and marketing, as backdrops for music videos, and in merchandise and packaging. This market-oriented graffiti constitutes the mainstreaming of a subculture, that is, selling the stylistic subcultural elements as a new fad. Subsequently, commercial graffiti has been criticised for undermining the essence of real graffiti as the very aspect it seeks to oppose is now served, and in the process graffiti is robbed of its resistance identity. This article engages critically with this view by enquiring how Johannesburg commercial graffiti writers make sense of their commercial graffiti work. In a qualitative study, 11 commercial graffiti writers, who are engaged in small commercial contracts or who are freelancing for well-established consumer brands, and full-time graphic designers, were interviewed. Reoccurring themes that arose included self-expression and simplifying graffiti styles to be more accessible and “pretty” for general public consumption. Albeit in a different way, the recognition the graffiti writers gained from the public through their commercial work echoes some elements of the recognition gained through graffiti crews. Probably the most astounding finding of the study is that they felt that the commerciality of graffiti is simply a temporary phase that will eventually fade. 相似文献
727.
Patrick C. Meirick Gwendelyn S. Nisbett Lindsey A. Harvell-Bowman Kylie J. Harrison Matthew D. Jefferson Tae-Sik Kim 《政治交往》2018,35(3):450-469
This study examined the relationships among newspaper ad watch coverage, ad tone, and the accuracy of political advertising. A sample of political advertisements (N = 160) was drawn from the Campaign Media Analysis Group (CMAG) database and other sources for eight U.S. Senate races. Two experts on each race evaluated the ads’ accuracy and their ideological portrayals of candidates, while trained coders analyzed other aspects of the ads. Ad watch coverage from these races (ad watch N = 109) also was content-analyzed. The number of ad watches overall in a race and the number that explicitly criticized ads were positively related with the level of accuracy of political ads and with a tendency to portray their favored candidates closer to their actual ideological position—but the overall number of ad watches also was positively related with a tendency for ads to portray opponents as more extreme than their positions warranted. Ad watches usually tend to scrutinize negative ads more, but ad watch coverage in this study was unrelated with ad tone and with the number of negative ads in a race. Positive ads were rated as more accurate but also more prone to exaggerate the supported candidates’ centrism compared to other ads. Normative and practical implications are discussed.
We’re not going to let our campaign be dictated by fact checkers.— Neil Newhouse, pollster for the Mitt Romney 2012 campaign 相似文献
728.
Patrick N. Beymer Joshua M. Rosenberg Jennifer A. Schmidt Neil J. Naftzger 《Journal of youth and adolescence》2018,47(6):1178-1191
Out-of-school time programs focused on science, technology, engineering and mathematics (STEM) have proliferated recently because they are seen as having potential to appeal to youth and enhance STEM interest. Although such programs are not mandatory, youth are not always involved in making the choice about their participation and it is unclear whether youth’s involvement in the choice to attend impacts their program experiences. Using data collected from experience sampling, traditional surveys, and video recordings, we explore relationships among youth’s choice to attend out-of-school time programs (measured through a pre-survey) and their experience of affect (i.e., youth experience sampling ratings of happiness and excitement) and engagement (i.e., youth experience sampling ratings of concentration and effort) during program activities. Data were collected from a racially and ethnically diverse sample of 10–16 year old youth (n?=?203; 50% female) enrolled in nine different summer STEM programs targeting underserved youth. Multilevel analysis indicated that choice and affect are independently and positively associated with momentary engagement. Though choice to enroll was a significant predictor of momentary engagement, positive affective experiences during the program may compensate for any decrements to engagement associated with lack of choice. Together, these findings have implications for researchers, parents, and educators and administrators of out-of-school time programming. 相似文献
729.
Christophe Lesschaeve Patrick F. A. van Erkel Conrad Meulewaeter 《Journal of Elections, Public Opinion & Parties》2018,28(4):488-515
This paper seeks to explain why party candidates and their party leadership have congruent policy positions or not. Despite its importance as a way through which parties are able to behave as a unitary actor, this congruence has never been studied as a dependent variable. We seek to fill this void in the literature. Our results suggest that leadership-candidate congruence comes about through two mechanisms: selection and learning. With selection, the party leadership aims to get those candidates elected whose policy preferences are congruent with the party line. Learning occurs through the process of socialization in which candidates assume the views of the party they work and candidate for as their own under. This happens under the pressure of cognitive dissonance. If a candidate learns about the position of the leadership and notices that they are incongruent, they may feel discomfort and change their opinion to be congruent with the party. 相似文献
730.
This special edition reflects on the contemporary relevance of the insights and concerns of David Marquand's book The Progressive Dilemma. In this Introduction, the editors set the scene for these reflections. They consider the structural changes that have occurred in politics since the 1990s: the impact of globalisation, the erosion of class identities, the rise of ‘identity politics’ and the continued fragmentation of the party system. There has been no reconciliation between the parties of the centre‐left, nor any re‐examination of the ‘liberal tradition’ and the potential for a new synthesis with revisionist social democracy. On the one hand, Corbynism is a radicalised metropolitan species of liberalism, while on the other there are plenty in Labour who stress the need for the party to re‐engage with the traditional, socially conservative values of the working class in a new ‘postliberal’ appeal. Yet the authors argue that those who broadly identify with progressive causes in British politics—animated by the various overlapping strands of social liberalism, social democracy and liberal socialism—have still to work out how to address the historic failings that Marquand so eloquently exposed, to create a new and inspiring intellectual vision that unites and energises the left and centre‐left. 相似文献