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   8334篇
  免费   4篇
各国政治   206篇
工人农民   1072篇
世界政治   189篇
外交国际关系   289篇
法律   4696篇
中国政治   1篇
政治理论   1884篇
综合类   1篇
  2024年   3篇
  2023年   4篇
  2022年   4篇
  2021年   4篇
  2020年   6篇
  2019年   7篇
  2018年   1275篇
  2017年   1204篇
  2016年   1018篇
  2015年   66篇
  2014年   21篇
  2013年   33篇
  2012年   190篇
  2011年   918篇
  2010年   1019篇
  2009年   582篇
  2008年   731篇
  2007年   686篇
  2006年   5篇
  2005年   64篇
  2004年   170篇
  2003年   140篇
  2002年   29篇
  2001年   2篇
  2000年   9篇
  1999年   1篇
  1998年   12篇
  1997年   15篇
  1996年   20篇
  1995年   29篇
  1994年   24篇
  1993年   1篇
  1988年   1篇
  1984年   10篇
  1983年   8篇
  1982年   5篇
  1979年   5篇
  1978年   7篇
  1977年   9篇
  1971年   1篇
排序方式: 共有8338条查询结果,搜索用时 0 毫秒
261.
262.
263.
264.
Little is known about the conditions strengthening or weakening the impact of a firm’s collaboration with research organizations on innovation performance. Thus, this study uses a sample of 542 manufacturing firms in Korea to examine how innovation orientation and firm size and age as internal characteristics influence the relationship between collaboration with research organizations and innovation performance. The results show that collaboration with research organizations has a positive impact on innovation performance. More importantly, this effect is stronger (weaker) for firms with a strong orientation toward exploration (exploitation). In addition, older or larger firms obtain greater benefits from collaboration with research organizations. This study contributes toward clarifying a firm’s collaboration with research organizations.  相似文献   
265.
We study the economic value of both embodied technological change and Research and Development (R&D) investment as proxies for the inputs of innovative activities conducted by Vietnamese firms. Our main focus is on the profitability of young innovative companies (YICs), private innovative companies (PICs), and small and young companies (SYCs). In particular, we test whether YICs could prove successful in fostering economic development through their technological change activities. Results show that (a) although YICs are more R&D intensive and innovative than PICs and SYCs, in general they do not produce equivalent performance; however those specific YICs focusing on technological change potentially outperform their counterparts, and (b) PICs are more capable than the other types of firms in translating their innovative effort to higher profitability.  相似文献   
266.
In the entrepreneurial economy of today, it is not the multinational firms which are the predominant driver in the creation of new knowledge, but the individual entrepreneur. Correspondingly, new ventures of small size are leading in commercializing new knowledge and transferring it to the market. This economic shift has been reflected by broad entrepreneurship policies, which aim at supporting the individual on the challenge of a high-growth start-up. However, prior experience shows that uniform entrepreneurship policies do not address the individual needs in different countries and ecosystems adequately. In this paper, we study the performance of academic spin-offs that received public funding from the German EXIST Business Start-Up Grant, a support program which aims at increasing the number of innovative start-ups from academia. Using a control group matching approach, we provide evidence that these start-ups are smaller by two full time equivalent employees, generate 1.7 times higher losses and have a nearly three times lower return on capital than science-based entrepreneurial firms with comparable characteristics in the first 5 years after foundation. We interpret these results to be primarily caused by the inferior financial contracting structure of the program compared to private venture capital funding and by the resulting adverse selection and incentive effects on the entrepreneurs. The evidence calls for rethinking public interventions in a national system of entrepreneurship.  相似文献   
267.
This article seeks to address two fundamental questions: (1) Does social capital (SC) embedded in global buyer–supplier (GBS) relationships enhance local firms’ potential absorptive capacity (PAC) and realized absorptive capacity (RAC)? And (2) What are the effects of local firms’ PAC and RAC on their innovation outcomes? Based on survey data collected from 297 Chinese firms engaged in GBS cooperation in China’s Yangtze River Delta region, we test our research hypotheses with the structural equation modelling approach. The empirical findings indicate that both structural and relational SC are important antecedents of PAC and RAC in global buyer–supplier relationships. More specifically, RAC not only improves local suppliers’ new product performance, but also fully mediates the relationship between PAC and new product performance. Our results have two major implications for practicing managers. First, local suppliers in emerging economies need to pay more attention to SC embedded in GBS relationships for it is an important means for them to overcome resource constraints and therefore to improve their new product performance. Second, it is important for managers in local firms to continuously improve their PAC to better assess and assimilate external knowledge, and extend their RAC to upgrade their interpretation and comprehension of commercialization possibilities, which allows for generating synergy of knowledge recombination with existing core competencies.  相似文献   
268.
The Heart of Human Rights develops an account of human rights as legal entities that serve important moral purposes in a legitimate international human rights practice. This paper examines Allen Buchanan’s general concept of institutional legitimacy and aims to expand that concept by emphasizing its connection with several ideas developed in the book about the nature and function of a system of international human rights. When it incorporates those ideas, Buchanan’s ‘Metacoordination View’ can be seen to set a standard of legitimacy not only for assessments of an international scheme of human rights institutions, but also for the basic institutional structures of domestic states. Furthermore, we can see how the nature and function of human rights in the international practice of human rights bears on legitimacy assessments of particular domestic institutions.  相似文献   
269.
Tax policy informed by Libertarian paternalism suggests that taxes should be levied on non-‘rational’ choice (i.e., where a person makes a ‘foolish’ decision by their own internal standards). In respect of excise taxes on sugar sweetened beverages, the regressivity of such policies can then be justified by reference to a progressive health effect, since the poor are more sensitive to changes in price and disproportionately tend to consume sugar sweetened beverages. However, as it currently stands, that conclusion is based merely on a presumption of irrationality of the poor as a class and neither the relative price of goods subject to such taxes, nor the associated ‘welfare loss’ from the levy of the tax, have been systematically measured. Such a presumption of non-‘rationality’ in food choice only holds with respect to persons who are not bound by relative prices of food, namely the wealthy. Accordingly, it is reasonable for scholars to consider the levy of excise taxes on unhealthy food consumed primarily by the wealthy (e.g., foie gras) as a ‘nudge’ toward a healthier food choice. Furthermore, the poor are rational agents capable of analysing and comparing relative prices of food products taking into account the health effects. As various scholars have now proposed in medical journals, any incremental tax levied on the poor in respect of sugar-sweetened beverages should be offset, for example, with a credit for healthy foods including fruits and vegetables.  相似文献   
270.
The International Court of Justice (ICJ) advisory opinion on the Legality of the Threat or Use of Nuclear Weapons in 1996 was a landmark case because, for the first time in history, the legal aspect of nuclear weapons was addressed. The decision has evoked controversies regarding the Court’s conclusion, the legal status of international humanitarian law in relation to nuclear weapons, and a newly introduced concept of state survival. While much legal scholarship discusses and criticizes the legal significance of the opinion, there has not been enough scholarship examining the Court’s specific choice of words and concepts that sustain its wider ideological and political position in the opinion. The paper argues that the Court’s vague and controversial logic is attributed to its confrontation with two international orders/codes: the legal order (or international law) and the political order (or state practice). The paper engages in legal semiotics as methodology to decode legal text and discover a deep structure that sustains networks of codes, according to which text is interpreted. Through the semiotic examination of three sets of key concepts (1) “permitted” and “prohibited,” (2) “threat of use” and “possession of the weapon,” and (3) “state survival,” the paper shows the ICJ’s confrontation with two orders/codes and eventual prioritization of the political order over the international legal order. The analysis of the opinion based on legal semiotics indicates an intimate and inseparable relationship between state practice and international law, which must be disentangled for the sake of the rule of law.  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