全文获取类型
收费全文 | 7974篇 |
免费 | 176篇 |
专业分类
各国政治 | 402篇 |
工人农民 | 206篇 |
世界政治 | 528篇 |
外交国际关系 | 333篇 |
法律 | 4838篇 |
中国共产党 | 1篇 |
中国政治 | 20篇 |
政治理论 | 1689篇 |
综合类 | 133篇 |
出版年
2020年 | 76篇 |
2019年 | 86篇 |
2018年 | 127篇 |
2017年 | 144篇 |
2016年 | 163篇 |
2015年 | 119篇 |
2014年 | 138篇 |
2013年 | 892篇 |
2012年 | 219篇 |
2011年 | 206篇 |
2010年 | 166篇 |
2009年 | 178篇 |
2008年 | 218篇 |
2007年 | 195篇 |
2006年 | 207篇 |
2005年 | 169篇 |
2004年 | 168篇 |
2003年 | 173篇 |
2002年 | 184篇 |
2001年 | 312篇 |
2000年 | 286篇 |
1999年 | 230篇 |
1998年 | 101篇 |
1997年 | 118篇 |
1996年 | 87篇 |
1995年 | 94篇 |
1994年 | 98篇 |
1993年 | 91篇 |
1992年 | 166篇 |
1991年 | 179篇 |
1990年 | 168篇 |
1989年 | 186篇 |
1988年 | 160篇 |
1987年 | 155篇 |
1986年 | 171篇 |
1985年 | 140篇 |
1984年 | 137篇 |
1983年 | 146篇 |
1982年 | 89篇 |
1981年 | 84篇 |
1980年 | 67篇 |
1979年 | 113篇 |
1978年 | 68篇 |
1977年 | 66篇 |
1976年 | 61篇 |
1975年 | 72篇 |
1974年 | 85篇 |
1973年 | 82篇 |
1972年 | 73篇 |
1971年 | 63篇 |
排序方式: 共有8150条查询结果,搜索用时 8 毫秒
271.
Christopher J. O'Leary Robert G. Spiegelman Kenneth J. Kline 《Journal of policy analysis and management》1995,14(2):245-269
Unemployment insurance is intended to reduce hardship by providing labor force members with partial wage replacement during periods of involuntary unemployment. However, in performing this income maintenance function, unemployment insurance may prolong spells of unemployment. Evidence from a field experiment conducted in Illinois in 1984 suggested that offering unemployment insurance claimants a modest cash bonus for rapid reemployment would increase the speed of return to work and reduce program costs. In 1988 a similar experiment, examining several different bonus offers, was conducted in the state of Washington. Evidence from the Washington experiment indicates that bonus offers do change job seeking behavior, but that only relatively generous bonus offers—about six times the weekly benefit amount—should be expected to significantly change the behavior of people eligible for unemployment benefits. 相似文献
272.
Franklin G. Mixon Jr. 《Public Choice》1995,83(1-2):127-137
This study provides evidence of public choice determinants of the penalties assessed by the Environmental Protection Agency for carbon emissions violations. Following the work of Stigler (1971), Peltzman (1976), Tollison (1982), and Tullock (1989), this study points out that powerful business interest groups are able to use their political influence to shape EPA environmental policy for urban areas. The statistical estimates presented here suggest that business groups have limited power (through lobbying activity) in affecting the probability of the occurrence of an EPA citation for carbon emissions violations, while they may have considerable power in influencing thedegree of an EPA citation for carbon emissions standards, once a citation occurs. 相似文献
273.
274.
The Articles of Confederation, usually neglected by those studyingthe American founding, formed an important part of the backgroundto the 1787 Constitution. The Articles functioned as the firstnational constitution of the United States and, as such, reflectedAmerican political theory as it emerged during the Revolution.Equally important, a textual analysis reveals the extent towhich the 1787 Constitution was a logical extension of the Articlesof Confederation. Most of the Articles were incorporated inthe U.S. Constitution, and several key changes found in thelater document were present in embryo in the Articles of Confederation. 相似文献
275.
Otto G. Mayer 《Society》1990,28(1):72-78
He is editor of Intereconomics,a journal issued in English, and author of major policy statements on economic and social issues. 相似文献
276.
C G Scott 《Social security bulletin》1989,52(8):2-9
In order to receive payments under the Supplemental Security Income (SSI) program, an aged, blind, or disabled person's countable resources must fall below specified limits. The current limits are +2,000 for an individual and +3,000 for a couple. In 1987, when the data were collected for this study, these limits were +1,800 for an individual and +2,700 for a couple. This study found that the resource levels of most SSI recipients were well below the 1987 limits. A majority of SSI recipients had less than +100 in countable resources, and only about 12 percent of SSI recipients had more than +1,000 of resources. These low levels of resources ensure that relatively few recipients become ineligible for SSI payments because of resource accumulation. The most common forms of countable resources held by SSI recipients were cash, checking accounts, and savings accounts. 相似文献
277.
C G Scott 《Social security bulletin》1989,52(2):2-13
Since its enactment in 1974, the Supplemental Security Income (SSI) program has had a stable caseload of about 4 million recipients. Hidden by this unchanging total is the fact that nearly 9 million persons were served by the program from 1974 to 1986. This study explores some SSI program dynamics by following a group of SSI awardees for a period of 4 years from the initial receipt of award in 1981. Many of these awardees had previous contact with the program either through a previous award or a denial. About 60 percent of the awardees were eligible at the end of the 4-year period. Most persons who became ineligible did so within the first 6 months after the award. 相似文献
278.
279.
280.
The present study identified variables that discriminated bulimic (N=71) from nonbulimic (N=71) adolescent females within a high school setting. A discriminant function analysis identified six variables that significantly differentiated these two groups. These variables included disturbed eating attitudes, negative perceptions of weight and body image, depressive symptomatology, and alcohol use. Post hoct tests indicated that, compared to the nonbulimic girls, the bulimic adolescents were significantly more depressed, viewed themselves as significantly more overweight, used alcohol significantly more frequently, possessed significantly more disturbed eating attitudes, had a significantly greater discrepancy between their current and ideal weight, and felt it was significantly more important to achieve this ideal weight. The implications of these findings for the etiology and early identification of bulimia in adolescence are discussed.Received Ph.D. from Kent State University. Research interest is applied clinical research.Received Ph.D. from University of Vermont. Research interest is behavioral medicine. 相似文献