全文获取类型
收费全文 | 1035篇 |
免费 | 38篇 |
专业分类
各国政治 | 53篇 |
工人农民 | 44篇 |
世界政治 | 101篇 |
外交国际关系 | 67篇 |
法律 | 478篇 |
中国政治 | 14篇 |
政治理论 | 306篇 |
综合类 | 10篇 |
出版年
2023年 | 4篇 |
2021年 | 10篇 |
2020年 | 21篇 |
2019年 | 33篇 |
2018年 | 33篇 |
2017年 | 31篇 |
2016年 | 41篇 |
2015年 | 24篇 |
2014年 | 26篇 |
2013年 | 205篇 |
2012年 | 27篇 |
2011年 | 19篇 |
2010年 | 22篇 |
2009年 | 22篇 |
2008年 | 35篇 |
2007年 | 30篇 |
2006年 | 32篇 |
2005年 | 26篇 |
2004年 | 27篇 |
2003年 | 28篇 |
2002年 | 34篇 |
2001年 | 20篇 |
2000年 | 18篇 |
1999年 | 24篇 |
1998年 | 11篇 |
1997年 | 8篇 |
1996年 | 12篇 |
1995年 | 11篇 |
1994年 | 13篇 |
1993年 | 12篇 |
1992年 | 12篇 |
1991年 | 17篇 |
1990年 | 9篇 |
1989年 | 14篇 |
1988年 | 10篇 |
1987年 | 8篇 |
1986年 | 17篇 |
1985年 | 10篇 |
1984年 | 18篇 |
1983年 | 8篇 |
1982年 | 11篇 |
1981年 | 7篇 |
1980年 | 6篇 |
1979年 | 10篇 |
1978年 | 10篇 |
1977年 | 7篇 |
1976年 | 5篇 |
1975年 | 4篇 |
1970年 | 6篇 |
1967年 | 3篇 |
排序方式: 共有1073条查询结果,搜索用时 31 毫秒
911.
912.
Kristin L. Moilanen Carol A. Markstrom Elizabeth Jones 《Journal of youth and adolescence》2014,43(3):454-469
School-based extracurricular activity involvement has been associated with lower levels of substance use among adolescents from various populations; however, these associations have only been slightly examined among American Indian (AI) adolescents. Building from various theoretical perspectives, it was hypothesized that AI adolescents’ perceived access to and the intensity (i.e., frequency) of participation in extracurricular activities would be associated with lower substance use and less engagement in risky substance use behaviors (i.e., being drunk or high at school, riding/driving with an intoxicated driver, and selling drugs). The moderating influences of sex, age, reservation residence, and metropolitan status also were examined. Data from the 2010 Arizona Youth Survey were analyzed for 5,701 8th, 10th, and 12th grade AI adolescents (49.1 % female). The expected protective effects of extracurricular participation were demonstrated, such that high levels of perceived availability and intensity of participation consistently predicted low levels of all outcomes. Some of these associations were moderated by one or more demographic factors, with unique patterns emerging for each behavior. Ultimately, the findings suggest that AI adolescents benefit from the availability of extracurricular activities and intensity of participation in them, but the degree of the effect is contingent upon other individual and contextual characteristics. 相似文献
913.
Helen M.F. Jones 《Women's history review》2013,22(3):369-388
The Leeds Association of Girls' Clubs (LAGC) was set up by a group of women, including Hilda Hargrove, Dr Lucy Buckley and Mary and Margaret Harvey, to promote collaboration between the city's girls' clubs. The organisation epitomised women working in partnership whilst reflecting their differing philanthropic and political interests. However LAGC's collaborative approach resulted in liberal consensus which downplayed the significance of girls' working conditions. Throughout the decade LAGC's focus was its annual competitions. These featured utilitarian and decorative handicrafts (darning and doylies) enshrining both frugality and aspiration, alongside dance and drill which channelled girls' vigour. Nevertheless, LAGC's resilience resulted in an organisation which is still in existence. 相似文献
914.
Most Social Security Disability Insurance (DI) beneficiaries must complete a 5-month waiting period before they become entitled to DI cash benefits and an additional 24-month waiting period before Medicare benefits begin. The Accelerated Benefits (AB) demonstration is a randomized experiment designed to test the effects of providing newly entitled DI beneficiaries who do not have health insurance with a generous health benefits package during the Medicare waiting period. This article presents early findings on the prevalence of health insurance coverage among newly entitled beneficiaries and the characteristics of those without health insurance. It also examines the effects of AB on health care utilization, the extent to which AB reduces unmet medical needs, and the costs of providing the AB health benefits package. 相似文献
915.
Do citizens hold their representatives accountable for policy decisions, as commonly assumed in theories of legislative politics? Previous research has failed to yield clear evidence on this question for two reasons: measurement error arising from noncomparable indicators of legislators’ and constituents’ preferences and potential simultaneity between constituents’ beliefs about and approval of their representatives. Two new national surveys address the measurement problem directly by asking respondents how they would vote and how they think their representatives voted on key roll‐call votes. Using the actual votes, we can, in turn, construct instrumental variables that correct for simultaneity. We find that the American electorate responds strongly to substantive representation. (1) Nearly all respondents have preferences over important bills before Congress. (2) Most constituents hold beliefs about their legislators’ roll‐call votes that reflect both the legislators’ actual behavior and the parties’ policy reputations. (3) Constituents use those beliefs to hold their legislators accountable. 相似文献
916.
Stephen Jones 《Australian Journal of Public Administration》2010,69(2):165-177
Since the election of the Rudd Government in 2007 intergovernmental relations have been a major feature of the political agenda. A ‘new federalism’ approach introduced a re‐invigorated Council of Australian Governments (COAG) focused on developing national policies that reflect coordinated and cooperative policy‐making processes. The establishment of COAG working groups provided the means for developing policies that reflect new levels of agreement between jurisdictions and a common approach to reform. The development of the 20% Renewable Energy Target has been one of the first initiatives of this new approach to policy‐making. This research analyses the process behind the development of the target and places it within the context of the post‐Machiavellian approach, and looks at the implications for future intergovernmental relations. 相似文献
917.
Scott Barkowski Joanne Song McLaughlin Alex Ray 《Journal of policy analysis and management》2020,39(3):629-663
We study state and federal health insurance coverage mandates for young adults. Despite consistent findings that the Affordable Care Act's (ACA) federal mandate was effective, research has disagreed on whether preexisting, state-level mandates were successful in increasing coverage. We reconsider the issue with a new analytical perspective and newly available accurate data on state mandates. We show that the impact of the state mandates was substantive and concentrated among young adults between ages 19 and 23. Our estimates indicate that dependent coverage rose by 3.9 percentage points and overall coverage rose by 3.3 percentage points. Crowd-out of coverage through young adults’ own jobs was negligible. For those above 23, we find little evidence of changes in coverage. We incorporate these insights into analysis of the ACA's mandate, showing its effects were focused among those who were not eligible for state mandates, or were eligible but older than 23. Our results suggest that eligibility restrictions played important roles in limiting the scope of the state mandates, but they can be practical and effective tools for policymakers looking to ensure or expand coverage for young adults in the face of uncertainty about the ACA. 相似文献
918.
Decades of research suggests that campaign contact together with an advantageous socioeconomic profile increases the likelihood
of casting a ballot. Measurement and modeling handicaps permit a lingering uncertainty about campaign communication as a source
of political mobilization however. Using data from a uniquely detailed telephone survey conducted in a pair of highly competitive
2002 U.S. Senate races, we further investigate who gets contacted, in what form, and with what effect. We conclude that even
in high-profile, high-dollar races the most important determinant of voter turnout is vote history, but that holding this
variable constant reveals a positive effect for campaign communication among “seldom” voters, registered but rarely active
participants who—ironically—are less likely than regular or intermittent voters to receive such communication.
相似文献
E. Terrence JonesEmail: |
919.
Seven ethyl homologues of known tropane esters have recently been detected as impurities in the gas chromatographic signature profiles of authentic Peruvian illicit cocaine base and hydrochloride exhibits. Peruvian cocaine base processors are now known to use ethanol for the purification of crude cocaine base. This process is referred to as the "base lavada" or "washed base" process and is a recent substitute method for the potassium permanganate oxidation purification methodology. Seven ethyl ester homologues were formed in illicit cocaine from the transesterification of known tropane methyl esters or possibly ethyl esterification of their respective tropane C-2 carboxylic acids in the presence of ethanol. Exhibits containing these compounds were subjected to gas chromatographic-mass spectrometric analyses to determine their identity and were subsequently synthesized to verify their structures. Quantitative determinations were obtained from ion-pair chromatography isolation followed by gas chromatography with flame ionization detection. Specifically, hexanoylecgonine ethyl ester, cocaethylene, cis-cinnamoylecgonine ethyl ester, trans-cinnamoylecgonine ethyl ester, 3',4',5'-trimethoxybenzoylecgonine ethyl ester, cis-3',4',5'-trimethoxycinnamoylecgonine ethyl ester, and trans-3',4',5'-trimethoxycinnamoylecgonine ethyl ester were detected and characterized. When present, these compounds were detected at levels ranging from 8.6 x 10(-4) to 9.3 x 10(-1)% relative to cocaine. 相似文献
920.