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   71481篇
  免费   3276篇
  国内免费   5篇
各国政治   4474篇
工人农民   2972篇
世界政治   6108篇
外交国际关系   3826篇
法律   34867篇
中国共产党   15篇
中国政治   781篇
政治理论   20770篇
综合类   949篇
  2021年   415篇
  2020年   1165篇
  2019年   1525篇
  2018年   1698篇
  2017年   1997篇
  2016年   2192篇
  2015年   1828篇
  2014年   2103篇
  2013年   10530篇
  2012年   1694篇
  2011年   1849篇
  2010年   1874篇
  2009年   2094篇
  2008年   1885篇
  2007年   1891篇
  2006年   2026篇
  2005年   1922篇
  2004年   1793篇
  2003年   1624篇
  2002年   1651篇
  2001年   1782篇
  2000年   1508篇
  1999年   1362篇
  1998年   1150篇
  1997年   984篇
  1996年   973篇
  1995年   930篇
  1994年   942篇
  1993年   964篇
  1992年   1047篇
  1991年   1099篇
  1990年   1038篇
  1989年   1047篇
  1988年   1064篇
  1987年   1035篇
  1986年   1045篇
  1985年   1101篇
  1984年   979篇
  1983年   1025篇
  1982年   905篇
  1981年   869篇
  1980年   670篇
  1979年   714篇
  1978年   615篇
  1977年   546篇
  1976年   500篇
  1975年   447篇
  1974年   463篇
  1973年   450篇
  1972年   393篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
191.
The failure of forestry to contribute to poverty reduction in Central America is due to public policies which inhibit its profitability. Absence of public regulation of harvesting and competing subsidies to agriculture keep forestry stumpage prices artificially low. This encourages destruction of the forest resource, which damages both the environment and the potential to reduce poverty. A comparison of Costa Rica and Honduras reveals two dissimilar approaches toward forest policy. While Costa Rica attempts to raise producer and grower stumpage prices by tax credits, soft loans and differential species fees, Honduras enforces price ceilings and uses centralized authority to control forest production and export. Both countries exhibit weaknesses in the management control cycle of programming, budgeting, implementing and evaluating their forest policies. Yet the Costa Rican approach has increased stumpage prices already, which bodes well for their forest sector. By contrast, the major beneficiary of Honduran forest policy has been COHDEFOR, the state enterprise responsible for forestry management, controlling production, and running its national system of agroforestry cooperatives. Despite greater public authority and resources than the Costa Rican forest service (DGF), the Honduran forest policy is not likely to increase producer profitability or reduce poverty in the near future.  相似文献   
192.
Provincial governments in the Netherlands have only one general tax at their disposal. However, it has become an insufficient source of revenue for this level of government in the Dutch system. To increase the revenue raising capacity of the provincial governments, thirteen broad-based general tax proposals not used at the local level were examined. The objective was to find a fair and equitable tax that could easily be collected and would result in fl. 200 million in additional revenue for the provincial governments.  相似文献   
193.
194.
195.
196.
197.
198.
New York State experimented with replacing their litigation-oriented system for achieving toxic dump site cleanup with one promising to lower transaction costs through alternative dispute resolution. Our analysis of outcomes is informed by three generations of implementation work focusing on (1) the motivations and incentives shaping individual behavior, (2) the larger organizational and political factors associated with variation across cases, and (3) the generic properties of policy implements. This mosaic approach to explanation produces, we believe, a more lifelike picture of use to policy makers for understanding the dynamic and interrelated nature of their choices.  相似文献   
199.
The process is not the problem, the problem is the problem. Rudolph Penner (1984). …We argue the superiority of the outcome from the process, not of the process from the outcome. The constancy of the economist's objection to this conclusion when applied to governmental rather than market decisions simply often reflects the fact that, while some economists are not disturbed that consumer preferences lead to allocation policies other than best respond to their own tastes, when political preferences lead to governmental policies not consistent with his informed and considered preferences, they are tempted to attribute irrationality to government.  相似文献   
200.
The EPA implements its policy of exhaust emission control by setting standards specified in terms of grams of pollutants per mile traveled. As a result, the tax must first restrain the vehicle miles traveled (VMT) if it is to have an impact on emission at all. EPA's choice of miles traveled as the medium through which its policy of pollution control must run is unfortunate, because travel is an activity that people resist giving up. This is reflected in a low long-run price elasticity of travel demand. Consequently, it takes substantial increases in the gasoline tax to make an impact on long-run travel demand. Simulation results show that under an alternative policy option, where EPA's standards are specified in terms of grams of pollutant per gallon of fuel burned, the same long-run reduction in exhaust emissions achievable today can be achieved (at an even higher level of confidence) with less than one-tenth of the increase in gasoline price required under the existing policy regime.  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