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   525篇
  免费   22篇
  547篇
  2024年   2篇
  2023年   6篇
  2022年   2篇
  2021年   4篇
  2020年   19篇
  2019年   26篇
  2018年   29篇
  2017年   29篇
  2016年   24篇
  2015年   13篇
  2014年   17篇
  2013年   107篇
  2012年   19篇
  2011年   22篇
  2010年   22篇
  2009年   24篇
  2008年   18篇
  2007年   20篇
  2006年   18篇
  2005年   20篇
  2004年   7篇
  2003年   14篇
  2002年   9篇
  2001年   5篇
  2000年   7篇
  1999年   4篇
  1998年   4篇
  1997年   7篇
  1996年   8篇
  1995年   4篇
  1994年   3篇
  1993年   2篇
  1992年   4篇
  1990年   5篇
  1989年   2篇
  1987年   2篇
  1986年   2篇
  1985年   2篇
  1984年   2篇
  1983年   2篇
  1982年   1篇
  1980年   1篇
  1979年   2篇
  1978年   3篇
  1977年   1篇
  1974年   2篇
  1971年   1篇
排序方式: 共有547条查询结果,搜索用时 15 毫秒
41.
As technologies grow in complexity, firms often target their internal R&D resources on core competencies and utilize outside sources for supporting knowledge and technology. Where do firms turn to find such resources? This paper reports the perceptions of technology transfer managers in United States manufacturing firms toward federal and university labs and identifies the types of farms that are better positioned to utilize externally available technological resources. Based on replies from research-intensive companies within the United States, the authors find that larger firms with high research and development (R&D) budgets tend to ascribe greater significance to external sources than do smaller ones. Also, companies spending over $500 million in R&D rank universities the most significant external source of knowledge, followed by V S.-based firms, and then foreign firms.  相似文献   
42.
Before 1644, the Manchu rulers pursued a deliberate policy of alliances with the southern (later “Inner”) Mongol tribes. In the 1630s the system of treaties and alliances gave way to the creation of the League-Banner system, the jasaq system, and the Lifan Yuan. The new territorial and political organization meant that the southern Mongols, while retaining a degree of autonomy, became subjects of the Qing dynasty. This essay explores the historical circumstances of the transformation of the relationship between Manchus and Mongols from partnership to subordination. It also aims to explain the political principles deployed by the Manchus in the redefinition of their relationship with the Mongol elites. More specifically, the essay proposes that the new forms of administration of Inner Mongolia stemmed from a condition of “tutelage.” Tutelage was not simply imposed by the Manchus upon their erstwhile allies, but actively sought by Mongol aristocrats in the context of the intra-Mongol wars carried out by the Čaqar leader Ligdan Khan.  相似文献   
43.
The Maisin women of northeastern Papua New Guinea are among the last coastal Papuans to tattoo their faces. This article first describes the techniques and social process of Maisin tattooing. We then examine the resilience of the custom in light of changes in puberty rites and notions of gender. We argue that these contexts have lost their cultural salience as a result of the Maisins' incorporation into the larger Papua New Guinea society. Tattooing has acquired new significance as a marker of cultural identity in a multicultural setting and as a sign of the Maisin people's commercial success as makers of indigenous art.  相似文献   
44.
In north-western Patagonia, obsidian was used during the entire Holocene, and its importance increased with time. Recent fieldwork discovered a new obsidian source located in the Río Grande, which was called ‘Coche Quemado' (CQ). The results indicate that the CQ source has a different geochemical signal than all other sources in the region. Its use is spatially restricted to piedmont and, to a lesser extent, the plains. Chronologically, CQ was exploited in the middle and late Holocene, and its use accounts for a range of spatial distribution between 150 and 200 km.  相似文献   
45.
According to classical literature on delegation in the regulatory state, independent regulators are established to enhance the credibility of regulatory policies. In that regard, anti-corruption agencies (ACAs) are peculiar not only because they deal with extremely salient issues, but also because they receive delegated competencies from the government as the “principal” while, at the same time, the government is their regulatory target. How do governments manage regulatory reforms to strike a balance between gaining credibility as “principals” and possibly losing credibility as targets? Drawing from insights on historical institutionalism, this article undertakes a qualitative longitudinal analysis of organizational change regarding ACAs in Italy, where these kinds of agencies are particularly relevant to political leaders. The findings shed light on delegation as a dynamic process for which multiple factors intersect over time.  相似文献   
46.
The aim of the article is to examine how the population size of voluntary associations affects the process through which the public's issue priorities are translated into policy priorities. We conduct a time series analysis of political attention in executive and legislative agendas at the U.S. federal level in the period 1971–2001, covering all issues addressed by the U.S. government. We show that the number of voluntary associations in a policy area has a positive conditioning effect on the link between public priorities and attention for the president's State of the Union Address. However, our results do not find a positive effect for voluntary associations at later stages of the policy cycle, which experience a higher degree of institutional friction. The findings underline the importance of distinguishing between different stages of policymaking when considering the impact of voluntary associations on dynamic agenda responsiveness.  相似文献   
47.
ABSTRACT

The starting point of the present paper is the nudge phenomenon. The most disturbing element of nudge is its potential for individual manipulation, that is, for relying on initiatives that go beyond the acceptable limits of interference in individual choice. This feature is not ignored by nudge advocates, who discuss it extensively to justify the overriding benefits of such initiatives. In this discussion, they acknowledge the seminal importance of J.S. Mill’s harm principle, which is introduced in On Liberty. Academics without hidden agendas must look into Mill’s theories from an intellectual history perspective and study to what extent Mill’s harm principle lends support to the interference of government and society in private lives. This paper first unveils some contradictions in the interpretation of Mill’s harm principle in order to show that it is an unlikely source of philosophical justification for nudge proponents. The paper argues further that Mill was familiar with Jeremy Bentham’s writings on indirect legislation, presented in the Traités de legislation civile et pénale. It pinpoints elements of indirect legislation that are discussed by Mill in On Liberty, without ever naming them as such. The paper contends that Mill’s presentation of the harm principle can be read as a discussion with Bentham in relation to the appropriate limits of government intervention in people’s lives. This double reading of Mill and Bentham through the lens of indirect legislation makes it possible to pinpoint the main differences between the authors as regards the appropriate degree of government interference. Bentham’s theories appear to be a more appropriate source of philosophical justification for the use of nudges than Mill’s harm principle.  相似文献   
48.
Zipf's rank‐size rule, lognormal distribution, and Gibrat's urban growth models are considered as summarizing fundamental properties of systems of cities. In this article, they are used as statistical benchmarks for comparing the shapes of urban hierarchies and evolutionary trends of seven systems of cities in the world including BRICS, Europe, and United States. In order to provide conclusions that avoid the pitfalls of too small samples or uncontrolled urban definitions, these models are tested on some 20,000 urban units whose geographically significant delineations were harmonized in each country over 50 years between 1960 and 2010. As a result, if the models appear not always statistically valid, their usefulness is confirmed since the observed deviations from empirical data remain limited and can often be interpreted from the geohistorical context of urbanism proper to each world region. Moreover, the article provides new free software which authorizes the reproducibility of our experiments with our data bases as well as with complementary data.  相似文献   
49.
Given the significant trading relationships between Canada and the United States, their transnational corporations and their tax authorities share more than a border. However, differences in transfer pricing regulations, tax rates, and regulatory enforcement philosophies have exacerbated many existing risks, and created new risks for executives in these corporations. These risks must be managed proactively, yet attempts at risk management are often incompatible with one tax authority or the other. Assuming that an operational transfer pricing framework is in place, there are several proactive strategies available to mitigate transfer pricing risk and potentially satisfy both tax authorities. An operational framework and proactive strategies, including documentation and advance pricing agreements, are discussed from the Canadian and US perspective, including expert interviews.  相似文献   
50.
This article presents the results of the excavation of a residence dated between the second and fourth centuries AD, constructed over the ruins of the South Arabian town of Makaynūn, in central Hadramawt (Yemen). The building yielded a large quantity of material including objects proving contacts between the central Hadramawt and regions located to the north‐east, such as central Oman, the Gulf area and India.  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