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   584篇
  免费   40篇
各国政治   37篇
工人农民   30篇
世界政治   69篇
外交国际关系   58篇
法律   237篇
中国政治   11篇
政治理论   178篇
综合类   4篇
  2023年   7篇
  2022年   5篇
  2021年   15篇
  2020年   26篇
  2019年   31篇
  2018年   40篇
  2017年   41篇
  2016年   34篇
  2015年   26篇
  2014年   29篇
  2013年   96篇
  2012年   25篇
  2011年   20篇
  2010年   13篇
  2009年   13篇
  2008年   20篇
  2007年   25篇
  2006年   15篇
  2005年   14篇
  2004年   18篇
  2003年   8篇
  2002年   13篇
  2001年   5篇
  2000年   8篇
  1999年   3篇
  1998年   4篇
  1997年   4篇
  1996年   4篇
  1995年   5篇
  1994年   3篇
  1993年   2篇
  1992年   2篇
  1990年   5篇
  1989年   2篇
  1986年   2篇
  1985年   2篇
  1984年   3篇
  1983年   6篇
  1982年   3篇
  1981年   2篇
  1979年   3篇
  1978年   1篇
  1977年   2篇
  1976年   4篇
  1975年   3篇
  1974年   1篇
  1973年   2篇
  1971年   3篇
  1968年   1篇
  1966年   1篇
排序方式: 共有624条查询结果,搜索用时 15 毫秒
261.
262.
We re-examine some of the strongest evidence supporting agricultural commercialisation, a highly touted yet under-researched development intervention. Our replication study re-examines Ashraf, Giné, and Karlan’s ‘Finding Missing Markets’ paper. Using the previous paper’s raw data, our research generally reproduces the original findings. We explore the evaluation’s theory of change, focusing on the result that first time export crop adopters benefit more from agricultural commercialisation than previous adopters. We also examine recall bias questions and provide sample size guidance for future researchers. Similar to the original paper, we find that the intervention mostly benefits households just entering the agricultural production value-chain.  相似文献   
263.
264.
265.
266.
267.
Exemption 3 of the Freedom of Information Act states that a federal agency can withhold a document that has already been deemed non-disclosable by a different statute. That exemption is often used by agencies that are involved in traditional national security practices and the controversial modern techniques of pervasive electronic surveillance, as justification for keeping information on those practices secret. This article argues that Exemption 3 has inadvertently made the security and surveillance establishment more secretive, creating a nearly irrebuttable presumption that documents must not be disclosed to citizens or journalists. Exemption 3 jurisprudence has allowed precedents on the secrecy of old-school surveillance techniques to be applied to the far more pervasive techniques exercised by security agencies in the modern era.  相似文献   
268.
269.
We examine the academe–industry wage gap. Once self-selection and different personal characteristics of academic and industrial scientists have been taken into account the wage gap narrows from 28 to 13 %. The counterfactual wage faced by an academic scientist increases with time spent on development and decreases with time spent on research. This finding challenges the idea of a solely negative relationship between science and wages. We further find that preferences for science augment the relationship between research orientation and wages. Overall, the results have implications for policy makers that aim to increase development oriented research activities at universities, individual scientists thinking about whether to pursue a career in industry or academe, and managers trying to hire academic scientists.  相似文献   
270.
What defense budget the United States should have and what defense budget it can afford are separate questions. The debate raging in Washington about Pentagon spending ignores the distinction. Doves insist that we need a more modest military strategy because the current one is wasteful and economically unsustainable. Hawks say that the current approach is sensible and affordable. This article takes a third path, arguing that U.S. military policy is likely to remain extravagant because it is sustainable. We adopted our current strategy—which amounts to trying to run the world with the American military—because we could, not because it was wisest. Wealth and safety make the consequences of bad defense policy abstract for most U.S. taxpayers. So we buy defense like rich people shop, ignoring the balance of costs and benefits. We conflate ideological ambition with what is required for our safety. Unfortunately, the current political demand for austerity and fewer wars will only temporarily restrain our military spending and the ambitions it underwrites.  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