全文获取类型
收费全文 | 20784篇 |
免费 | 1457篇 |
专业分类
各国政治 | 684篇 |
工人农民 | 816篇 |
世界政治 | 1442篇 |
外交国际关系 | 590篇 |
法律 | 14580篇 |
中国共产党 | 35篇 |
中国政治 | 201篇 |
政治理论 | 3682篇 |
综合类 | 211篇 |
出版年
2021年 | 103篇 |
2020年 | 449篇 |
2019年 | 448篇 |
2018年 | 573篇 |
2017年 | 656篇 |
2016年 | 711篇 |
2015年 | 604篇 |
2014年 | 597篇 |
2013年 | 1946篇 |
2012年 | 490篇 |
2011年 | 609篇 |
2010年 | 701篇 |
2009年 | 723篇 |
2008年 | 579篇 |
2007年 | 577篇 |
2006年 | 662篇 |
2005年 | 530篇 |
2004年 | 500篇 |
2003年 | 447篇 |
2002年 | 429篇 |
2001年 | 725篇 |
2000年 | 639篇 |
1999年 | 516篇 |
1998年 | 292篇 |
1997年 | 236篇 |
1996年 | 238篇 |
1995年 | 235篇 |
1994年 | 257篇 |
1993年 | 229篇 |
1992年 | 384篇 |
1991年 | 442篇 |
1990年 | 395篇 |
1989年 | 402篇 |
1988年 | 409篇 |
1987年 | 361篇 |
1986年 | 392篇 |
1985年 | 392篇 |
1984年 | 365篇 |
1983年 | 320篇 |
1982年 | 240篇 |
1981年 | 240篇 |
1980年 | 215篇 |
1979年 | 236篇 |
1978年 | 174篇 |
1977年 | 144篇 |
1976年 | 129篇 |
1975年 | 130篇 |
1974年 | 138篇 |
1973年 | 138篇 |
1971年 | 100篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
981.
The recent Supreme Court decision in Webster v. Reproductive Health Services giving more discretion to states to regulate abortion has led to speculation concerning which states might move to limit abortions. Medoff (1989) attempts to predict how state legislatures might vote on state-level abortion legislation by examining the 1983 Senate vote on the Hatch/Eagleton Amendment. We expand upon Medoff's analysis by incor- porating recent developments in agency theory as it applies to the political agents (i.e., Senators) in the empirical model. The results demonstrate that accounting for Senatorial "shirking" and state ideology substantially im- proves the predictive ability of the model for the Senate abortion vote. The predicted votes of the state's Senators, after eliminating the effects of apparent Senatorial shirking, are used to infer the likelihood of state-level legislation substantially restricting abortion. We compare these results to a base model that ignores the issue of shirking and find increased predict- ability and several differing results. 相似文献
982.
This paper considers the notion of cycle avoiding trajectories in majority voting tournaments and shows that they underlie and guide several apparently disparate voting processes. The set of alternatives that are maximal with respect to such trajectories constitutes a new solution set of considerable significance. It may be dubbed the Banks set, in recognition of the important paper by Banks (1985) that first made use of this set. The purpose of this paper is to informally demonstrate that the Banks set is a solution set of broad relevance for understanding group decision making in both cooperative and non-cooperative settings and under both sincere and sophisticated voting. In addition, we show how sincere and sophisticated voting processes can be viewed as mirror images of one another — embodying respectively, “dmemory” and “foresight.” We also show how to develop the idea of a “sophisticated agenda,” one in which the choice of what alternatives to propose is itself a matter of strategic calculation. 相似文献
983.
984.
D R Vaughan 《Social security bulletin》1989,52(1):12-26
This attempt to classify Social Security beneficiaries by type of benefit using the new Survey of Income and Program Participation (SIPP) has yielded promising results. Evaluations of the classification algorithm based on comparison of the estimated number of beneficiaries in each of the several categories to independent estimates of the number of beneficiaries indicate that in most instances a high percentage of each category has been identified. For the most part, age and monthly benefit amount size distributions seem reasonable. Furthermore, very few persons in the sample who were identified as Social Security beneficiaries could not be assigned to one or another of the benefit groups. The classification procedure also represents a marked improvement over earlier efforts to classify type of beneficiary that relied on data from the March Supplement to the Current Population Survey (CPS). Most importantly, the benefit classification scheme based on SIPP data appears to provide reasonably reliable distinctions between retired-worker and widow benefits for widowed women and permits the identification of retired-worker benefits for those women dually entitled to retired-worker and spouse benefits. In addition, the distinction between disabled- and retired-worker benefits for recipients aged 62-64 appears to be reasonably reliable, and for women under age 65, the classification procedure distinguishes between disabled-worker benefits on the one hand and widow and widowed mother benefits on the other. Finally, SIPP procedures for identifying minor child beneficiaries yield markedly better estimates than those available from the Current Population Survey. These improvements in the SIPP context are due entirely to the presence of information not collected in the CPS. The enhancement of the SIPP data set in turn resulted directly from an assessment of earlier work carried out by Projector and Bretz in the CPS context and on extensive research into the nature of Social Security reporting errors in the CPS. The superiority of the SIPP data set is linked principally to the presence of three pieces of information: the Medicare BIC, the direct question on reasons for benefit receipt asked of persons under age 65, and the direct measurement of recipiency and amount of benefits for minor children. Other items of some import include self-reported work disability, retirement status (ever retired from a job), previous marital status for currently married women, age first prevented from working due to a health condition, and Supplemental Security Income misreporting items.(ABSTRACT TRUNCATED AT 400 WORDS) 相似文献
985.
986.
Michael D. Reagan 《政策研究评论》1989,9(2):219-231
Much public discussion about health care assumes, explicitly or implicitly, that only by denial of potentially beneficial care (called "rationing") can cost containment be achieved. This piece critically examines the various current usages of "rationing," and argues that it is being misapplied. Fur- ther, the call for rationing may be deflecting us from fruitful exploration of non-rationing alternatives to cost control. Two of these are briefly sketched as examples: physician fee controls and practice guidelines. 相似文献
987.
Judicial decisions are one element in the erosion of local government budgetary discretion. For example, litigation concerning constitutional rights forces local government officials to allocate resources toward the rights-based population. While rights-based allocation decisions may narrow the budgetary discretion of public officials, some managers may, paradoxically, be "better-off"—defined as the ability to protect and defend their budgets — when discretion is reduced. This thesis is tested through a case study of jail overcrowding litigation in a county government. 相似文献
988.
989.
Susan D. Rose 《Society》1989,26(2):59-66
She has written several articles on Evangelicals and the Christian School Movement in the United States and on North American
evangelical activity in Guatemala. Her most recent publication is Keeping Them Out of the Hands of Satan: Evangelical Schooling in America. 相似文献
990.