首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   25028篇
  免费   952篇
  国内免费   5篇
各国政治   1041篇
工人农民   1011篇
世界政治   1833篇
外交国际关系   822篇
法律   16057篇
中国共产党   7篇
中国政治   203篇
政治理论   4804篇
综合类   207篇
  2021年   144篇
  2020年   370篇
  2019年   459篇
  2018年   523篇
  2017年   622篇
  2016年   649篇
  2015年   490篇
  2014年   526篇
  2013年   2360篇
  2012年   631篇
  2011年   724篇
  2010年   618篇
  2009年   654篇
  2008年   725篇
  2007年   733篇
  2006年   732篇
  2005年   663篇
  2004年   653篇
  2003年   669篇
  2002年   613篇
  2001年   1010篇
  2000年   862篇
  1999年   699篇
  1998年   401篇
  1997年   296篇
  1996年   313篇
  1995年   276篇
  1994年   325篇
  1993年   314篇
  1992年   486篇
  1991年   524篇
  1990年   507篇
  1989年   456篇
  1988年   488篇
  1987年   431篇
  1986年   504篇
  1985年   459篇
  1984年   368篇
  1983年   371篇
  1982年   277篇
  1981年   298篇
  1980年   206篇
  1979年   288篇
  1978年   191篇
  1977年   175篇
  1976年   155篇
  1975年   158篇
  1974年   191篇
  1973年   159篇
  1972年   152篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
971.
This article analyzes the impact of the Gramm-Rudman-Hollings (GRH) Act on federal budgetary and fiscal outcomes. Rather than portraying it as a two-on federal budgetary and fiscal outcomes. Rather than portraying it as a two-party game between Congress and the president, each with monolithic policy preferences, we view GRH as a multiparty negotiation game among advocates of different programs and agencies. In this game, agencies subject to sequestration and their congressional advocates have an incentive to reach a budget accord, while those exempt from sequestration do not. Consistent with this argument, we find that GRH has restrained outlays for nonexempt programs and that exempt programs have, if anything, experienced more rapid growth. Overall, GRH is estimated to have restrained outlays by $59 billion by fiscal 1989, and to have restrained outlays more effectively after the 1987 modifications in the Act. The Gramm-Rudman-Hollings Act signals another phase in the decade-long struggle between the White House and Congress over public spending priorities. Our final counterfactual analysis suggests that GRH partially returned federal fiscal and budgetary relationships and priorities to those that prevailed before Reagan.  相似文献   
972.
It is clear that urban economic development practices in Ontario tend to cluster in certain classifications. The most widely and consistently used practices are in the area of marketing. On average, nine out of eleven techniques are practised by the cities surveyed. Governance tools and infrastructure investments are also fairly widely employed, with an average of six out of ten uniformly used. Governmental regulations, land and property management activities, and financial tools are less widely employed, with averages of five of thirteen, four of eleven, and two of twelve techniques practised by all cities respectively. In total, cities in Ontario employ an average of twenty-five out of fifty-seven economic development techniques listed. The ten most widely practised techniques across all categories are identified in Table 6. Again, marketing activities figure predominantly. However, landbased incentives and initiatives such as land acquisition, industrial zoning and industrial parks, and infrastructure improvements also are important. Based on these findings, it appears that cities in Ontario offer a range of economic development incentives which conforms closely to those widely practised by other cities. Marketing, site acquisition, and infrastructure improvement are among the most commonly used techniques according to literature. Indeed, because much of the literature focuses on cities in the United States, this research also suggests that similar economic development incentives are offered by cities in Canada and the United States. However, financial incentives such as tax abatements, loans, and loan guarantees are notable by their absence in Ontario cities. Does the limitation on bonuses affect economic development practices in the other categories? In other words, what appears to be the result of provincial restrictions on bonuses? Based on survey results and personal interviews with a small sample of economic development officials in Ontario, it does seem that restrictions have had some impact. While common techniques do centre in the marketing and land based areas, it appears that Ontario cities are also more likely to use more innovative means of attracting economic development. For example, business incubators and training programs are utilized by over 25 per cent of the cities. Thus these techniques, often promoted in the literature as more advantageous to cities, seem to be used more widely in Ontario than in many other cities. Regulations to limit or control certain facets of development also seem more prevalent than easing governmental regulations to promote development. Finally, some innovative techniques such as awards for research and development are also evident. While many economic development officials acknowledge that provincial restrictions limit their ability to compete with other cities, particularly those in the United States (52 per cent agree), they are split over whether such restrictions are too extreme (40 per cent feel they are too restricted, 43 per cent feel that they are not). In interviews it was often suggested that such limitations do reduce the inter-city competition for development which often drives economic development policies in cities that are allowed to offer tax abatements and other incentives. Further research is warranted to explore more fully the effect of restrictions on economic development bonuses. If such limitations regularly result in practices that are judged to be effective in promoting economic development, then such policies as those contained in the Municipal Act appear promising.  相似文献   
973.
Central to this article is the question, “Are tax expenditure reports used?” State legislators serving on tax committees in ten states were surveyed regarding their use and their perceptions of others' use of tax expenditure report information. Responses indicate (1) strong acceptance and broad use of report information; (2) purposes and policy stages of use characteristic of technical information use; and (3) use focused predominantly on resource acquisition (revenue) policy rather than resource allocation (budget) policy. Thus it appears that tax expenditure reporting does not operate to secure budgetary control over tax expenditures, and consequently tax expenditures continue largely to escape budget scrutiny.  相似文献   
974.
Natural resource management policies like the Pacific salmon harvest policy developed by New York State often did not anticipate the extent of social, economic, and ethical concerns that would be generated, largely because the agency concentrated on biological considerations. The number of concerned stakeholders grew in proportion to both the success and failure of the initial policy. Had all participants been equally willing to recognize both the successes and the failures, development of a revised policy through group negotiations may have been possible, resulting in a cooperative mode of decision making. Instead, institutional mechanisms based on legislated process were ultimately the approach chosen for policy revision.  相似文献   
975.
976.
A pervasive theme of the congressional politics literature is that the committee system is fundamental in determining the policy status quo. Such an assertion hinges crucially upon committees controlling their jurisdictions; congressional delegation is undermined if a committee can assert authority over any issue domain at any time. Yet, representatives may possess an incentive to support a policy proposal that would change the status quo, even if it entails disregarding procedures. Indeed, standard conceptualizations of how members of Congress make their voting choices assume that only the benefits and costs associated with a policy matter, and they do not consider institutional factors such as whether a bill emerged from the correct committee.This analysis examines whether representatives will sacrifice policy interests to preserve institutional features of the legislature. The effort in 1987 to curb smoking on airplanes — which became embroiled in a difficult-to-resolve jurisdictional dispute — serves as a vehicle to analyze how sensitive members are to such features. The results demonstrate that a sizable number put aside their [generally moderate] policy preferences and voted against limits on smoking for institutional reasons. These findings have important implications both for specifying the determinants of policy change and for understanding institutional stability.  相似文献   
977.
978.
979.
980.
We conducted a short-term longitudinal study examining the structure of coping behavior and the relationship between coping style and depression during adolescence. The sample consisted of 603 adolescents in Grades 6–11 who were surveyed in the fall of 1989 and again in the fall of 1990. A two-dimensional model of coping was found using confirmatory factor analysis with the factors being approach and avoidant coping. Four cross-sectional and seven longitudinal coping groups were formed to explore group differences in depression. Approach copers reported the fewest symptoms of depression, while avoidant copers reported the most. Subjects who changed over time from approach to avoidant coping evidenced a significant increase in depressive symptoms, whereas subjects who switched from avoidant to approach coping displayed a significant decrease in depression over a one-year period. These findings imply that adolescents who are able to elicit social support, engage in problem solving, and cognitively restructure events within a positive light are more likely to successfully negotiate the challenges of adolescence.This research was supported by a grant from the William T. Grant Foundation (8912789), Anne C. Petersen, Principal Investigator. The writing of this article was supported by the National Institute of Mental Health Research Training Grant 5 T32MH18387-06 in Child Mental Health/Primary Prevention.Received Ph.D. in Human Development and Family Studies from Pennsylvania State University. Research interests include adolescent mental health and community research.Received his Ph.D. in Human Development and Family Studies from Pennsylvania State University. Research interests include adolescent mental health and research methodology.Received degree from the University of Chicago. Research interests are in biopsychosocial development in adolescence, with a focus on sex differences in mental health.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号