全文获取类型
收费全文 | 17002篇 |
免费 | 415篇 |
专业分类
各国政治 | 807篇 |
工人农民 | 661篇 |
世界政治 | 1115篇 |
外交国际关系 | 543篇 |
法律 | 10541篇 |
中国政治 | 103篇 |
政治理论 | 3511篇 |
综合类 | 136篇 |
出版年
2020年 | 169篇 |
2019年 | 233篇 |
2018年 | 297篇 |
2017年 | 347篇 |
2016年 | 351篇 |
2015年 | 260篇 |
2014年 | 309篇 |
2013年 | 1650篇 |
2012年 | 349篇 |
2011年 | 405篇 |
2010年 | 345篇 |
2009年 | 391篇 |
2008年 | 418篇 |
2007年 | 439篇 |
2006年 | 432篇 |
2005年 | 384篇 |
2004年 | 363篇 |
2003年 | 393篇 |
2002年 | 358篇 |
2001年 | 658篇 |
2000年 | 567篇 |
1999年 | 483篇 |
1998年 | 247篇 |
1997年 | 198篇 |
1996年 | 200篇 |
1995年 | 192篇 |
1994年 | 202篇 |
1993年 | 197篇 |
1992年 | 334篇 |
1991年 | 382篇 |
1990年 | 366篇 |
1989年 | 372篇 |
1988年 | 359篇 |
1987年 | 366篇 |
1986年 | 402篇 |
1985年 | 387篇 |
1984年 | 345篇 |
1983年 | 321篇 |
1982年 | 219篇 |
1981年 | 211篇 |
1980年 | 176篇 |
1979年 | 262篇 |
1978年 | 169篇 |
1977年 | 174篇 |
1976年 | 146篇 |
1975年 | 145篇 |
1974年 | 170篇 |
1973年 | 159篇 |
1972年 | 128篇 |
1971年 | 116篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
141.
142.
Sarmistha R. Majumdar 《政策研究评论》2005,22(2):157-169
In 1990, the state of California passed the pioneering mandate on zero emission vehicles (ZEV). This technology‐forcing regulation is aimed at improvement of air quality and protection of public health from the adverse effects of air pollutants from automobiles. Facing severe opposition from the auto industry, the mandate has been revised a number of times, most recently in 2003, whereby the requirement for ZEVs have been made to align with the pace of technology development. Review of strategies used in implementation of the mandate has revealed greater emphasis on the economic incentives for rather than on environmental merits of ZEVs. Using prospect theory as the framework for analysis, the reasons have been explored. The findings of the study help us to understand how decisions are made with respect with to deviations from a mental anchor point and through the process of evaluation of losses and gains. 相似文献
143.
This article surveys the voluminous economic literature on commoditybundling. While bundling has been widely studied, the vast majorityof the literature has focused on theoretical treatments of bundlingthat demonstrate a wide range of reasons why firms might engagein bundling. These papers generally contain restrictive assumptions,including assumptions regarding the existence of monopoly insome markets, and the nature of rivalry in others. The modelscontained in these papers also generally suppress the more obviousand ubiquitous reasons firms may use bundling. Moreover, thesemodels have not been subject to robustness checks, nor havetheir assumptions been tested empirically. This review of theeconomic literature generally confirms the US Solicitor General'sview in 3M v. LePage's regarding the underdeveloped state ofthe economics literature and its position that the US SupremeCourt should defer promulgation of antitrust standards for bundling.While the literature has demonstrated the possibility that bundlingcan generate anticompetitive harm, it does not provide a reliableway to gauge whether the potential for harm would outweigh anydemonstrable benefits from the practice. As a result, the widespreadapplication of the antitrust laws to bundling by firms can generatesignificant error costs by erroneously condemning or deterringefficient business practices. In the future, economists shouldseek to expand their understanding of both the anticompetitiveand procompetitive reasons firms engage in bundling. This willentail studying the reasons why bundling is adopted by firmswithout market power, relaxing the assumption of monopoly intheoretical models, and generating testable hypotheses and thedata to test them. 相似文献
144.
145.
146.
147.
148.
149.
150.
Constitutional engineering to overcome ethnoregional cleavagesis being put to a severe test on Cyprus, where Greek and Turkishcommunities haltingly endeavor to salvage a divided state Threeyears after independence in 1960, the attempt to govern throughfunctional federalism ended in civil war. Intervention by Greeceand Turkey in 1974 resulted in a de facto partitioning of therepublic into two ethnically homogeneous areas. Under UnitedNations auspices, communal elites bargain for a consociationalsettlement, balancing national autonomy and individual rights.The solution requires international safeguards guaranteeinga new constitution and providing for "free cities" under a bicommunaladministration. Failure of the international community to actwill lead to a partitionist solution as manifested by a growingacceptance of Turkish Cypriot statehood. 相似文献