全文获取类型
收费全文 | 516篇 |
免费 | 16篇 |
专业分类
各国政治 | 24篇 |
工人农民 | 16篇 |
世界政治 | 46篇 |
外交国际关系 | 10篇 |
法律 | 228篇 |
中国政治 | 7篇 |
政治理论 | 197篇 |
综合类 | 4篇 |
出版年
2021年 | 2篇 |
2020年 | 4篇 |
2019年 | 5篇 |
2018年 | 10篇 |
2017年 | 14篇 |
2016年 | 8篇 |
2015年 | 5篇 |
2014年 | 6篇 |
2013年 | 79篇 |
2012年 | 9篇 |
2011年 | 12篇 |
2010年 | 15篇 |
2009年 | 14篇 |
2008年 | 8篇 |
2007年 | 13篇 |
2006年 | 12篇 |
2005年 | 18篇 |
2004年 | 21篇 |
2003年 | 9篇 |
2002年 | 19篇 |
2001年 | 5篇 |
2000年 | 14篇 |
1999年 | 10篇 |
1998年 | 14篇 |
1997年 | 6篇 |
1995年 | 12篇 |
1994年 | 6篇 |
1993年 | 7篇 |
1992年 | 9篇 |
1991年 | 9篇 |
1990年 | 8篇 |
1989年 | 7篇 |
1988年 | 12篇 |
1987年 | 15篇 |
1986年 | 12篇 |
1985年 | 10篇 |
1984年 | 10篇 |
1983年 | 9篇 |
1982年 | 5篇 |
1981年 | 14篇 |
1980年 | 6篇 |
1979年 | 5篇 |
1978年 | 7篇 |
1977年 | 7篇 |
1976年 | 8篇 |
1975年 | 3篇 |
1974年 | 2篇 |
1973年 | 2篇 |
1972年 | 3篇 |
1965年 | 2篇 |
排序方式: 共有532条查询结果,搜索用时 15 毫秒
451.
452.
Dennis Coates Victoria Heid Michael Munger 《Journal of policy analysis and management》1994,13(3):526-538
Elected officials and policy analysts alike often treat equity and efficiency as distinct concerns. In this case study, focusing on U.S. policy for disposing of low-level radioactive waste, we consider an instance where the distinction between equity and efficiency is difficult to sustain. The “equity, then efficiency” approach embodied in the compact system of regional agreements is largely to blame for the current crisis facing generators, regulatory officials, and citizens. We find that nearly three times more waste disposal facilities are being contemplated than are financially viable. More generally, it is claimed that the approach for achieving an equitable solution must be very carefully designed, and that the concept of economic efficiency must be considered (at least in this case study) as part of the definition of equity. This case study is unusual, because we are able to make a recommendation that improves both efficiency and equity. 相似文献
453.
454.
455.
This paper provides evidence that interest group activity is negatively related to aggregate stock market performance. In particular, the findings imply that a one percent increase in the number of interest groups in a country is associated with a reduction in average annual stock market returns of roughly 2–5%, and a reduction in the volatility of annual stock returns of roughly 6–14%. In addition, the findings indicate that many of the same fundamentals that drive economic growth also explain stock market performance. 相似文献
456.
457.
458.
459.
460.
Abstract: The AmpF?STR® Identifiler® Direct PCR Amplification Kit is a new short tandem repeat multiplex assay optimized to allow the direct amplification of single‐source blood and buccal samples on FTA® card without the need for sample purification and quantification. This multiplex assay has been validated according to the FBI/National Standards and SWGDAM guidelines. Validation results revealed that slight variations in primer concentration, master mix component concentration, and thermal cycling parameters did not affect the performance of the chemistry. The assay’s sensitivity was demonstrated by amplifying known amounts of white blood cells spotted onto FTA® cards, and the assay’s specificity was verified by establishing minimal cross‐reactivity with nonhuman DNA. No effect on the age of the sample stored on the FTA® substrate was observed and full concordance was established in the population study. These findings of the validation study support the use of the Identifiler® Direct Kit for forensic standards and database samples genotyping. 相似文献