全文获取类型
收费全文 | 43111篇 |
免费 | 704篇 |
国内免费 | 134篇 |
专业分类
财政金融 | 6494篇 |
工业经济 | 2486篇 |
计划管理 | 7538篇 |
经济学 | 8952篇 |
综合类 | 2258篇 |
运输经济 | 222篇 |
旅游经济 | 317篇 |
贸易经济 | 8366篇 |
农业经济 | 1281篇 |
经济概况 | 5372篇 |
信息产业经济 | 52篇 |
邮电经济 | 611篇 |
出版年
2023年 | 134篇 |
2022年 | 252篇 |
2021年 | 453篇 |
2020年 | 449篇 |
2019年 | 392篇 |
2018年 | 2752篇 |
2017年 | 2607篇 |
2016年 | 1746篇 |
2015年 | 711篇 |
2014年 | 998篇 |
2013年 | 2252篇 |
2012年 | 1844篇 |
2011年 | 3751篇 |
2010年 | 3493篇 |
2009年 | 2843篇 |
2008年 | 2895篇 |
2007年 | 3161篇 |
2006年 | 1392篇 |
2005年 | 1433篇 |
2004年 | 1025篇 |
2003年 | 1054篇 |
2002年 | 701篇 |
2001年 | 509篇 |
2000年 | 394篇 |
1999年 | 276篇 |
1998年 | 300篇 |
1997年 | 248篇 |
1996年 | 246篇 |
1995年 | 207篇 |
1994年 | 192篇 |
1993年 | 230篇 |
1992年 | 234篇 |
1991年 | 238篇 |
1990年 | 187篇 |
1989年 | 186篇 |
1988年 | 161篇 |
1987年 | 177篇 |
1986年 | 209篇 |
1985年 | 235篇 |
1984年 | 229篇 |
1983年 | 229篇 |
1982年 | 200篇 |
1981年 | 191篇 |
1980年 | 212篇 |
1979年 | 188篇 |
1978年 | 135篇 |
1977年 | 157篇 |
1976年 | 141篇 |
1975年 | 147篇 |
1974年 | 125篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
以我国各省知识产权保护制度为研究对象,创新性地将探索性空间数据分析方法与社会网络分析方法相结合,基于地理邻近视角,验证了区域知识产权保护的空间相关性、空间集聚特征和空间溢出效应。同时,突破地理近邻效应的局限,解析区域知识产权保护的空间关联特征。结果表明:我国各省知识产权保护具有全局自相关性,相似地区间存在空间集聚效应,不同发展程度地区的空间关联性质不同;网络化后的区域知识产权保护各节点间联系紧密、网络结构稳定,并且可以确定核心行动者和边缘行动者角色;长三角、珠三角、环渤海等较发达地区与其它地区之间存在较多溢出关系。 相似文献
2.
导航过程中的路径规划与引导,不仅关系算法,更取决于所用的路网数据.路网有诸多属性和关系,关系到路径规划速度和引导合理性的最重要特征之一就是经路等级,又称拓扑阶层.本文拟从路径规划的原理出发,引出导航电子地图制作中路网经路等级设计的必要性,继而给出经路等级设计的一般规则以及设计方法,最后通过北京、天津、重庆等多个城市路网经路等级的设计结果,验证了所提出的设计方法的可行性和合理性. 相似文献
3.
Kent Jones 《International Advances in Economic Research》2018,24(1):79-96
This paper examines the pattern of settlements, investor wins and state wins in investor-state dispute settlement cases, focusing on the impact of arbitration rules, the resources and experience of the litigants, the type of treaty breach under investigation, and the pattern of state intervention. Logistic regression results show that settlements are more likely when investors do not disclose their allegations publicly, when the host state has been involved in a greater number of past cases, and when the respondent state has a higher control-of-corruption rating. Panel awards to investors are more likely in cases of alleged direct expropriation and less likely for indirect expropriation. Panel decisions favoring the state increase with higher per capita income and rule-of-law ratings. 相似文献
4.
In this paper we explore the micro-level determinants of conformity. Members of the social networking service Facebook express positive support to content on the website by clicking a Like button. We set up a natural field experiment to test whether users are more prone to support content if someone else has done so before. To find out to what extent conformity depends on group size and social ties we use three different treatment conditions: (1) one stranger has Liked the content, (2) three strangers have Liked the content, and (3) a friend has Liked the content. The results show that one Like from a single stranger had no impact. However, increasing the size of the influencing group doubled the probability that subjects expressed positive support. Friendship ties were also decisive. People were, on average, four times more likely to press the Like button if a friend, rather than a stranger, had done so before them. The existence of threshold effects in our experiment clearly shows that both group size and social proximity matters when opinions are shaped. 相似文献
5.
6.
Kent Jones 《International Advances in Economic Research》2018,24(4):325-338
Cuba sought economic independence from the U.S. and its reliance on sugar exports after its 1959 revolution, but subsequently developed new dependency relationships. In the meantime, Cuba remained inside the General Agreement on Tariffs and Trade (GATT), despite conducting most of its trade outside it. This paper explores the political economy of Cuba’s participation in the GATT and later the World Trade Organization (WTO). Documents show that Cuba sought to use its participation to gain new markets and influence in the developing world. While Cuba has gained little economically from its participation, in recent years it has diversified its exports and trade partners, and its trade interests now align more closely with WTO rules. Economic reforms will be necessary in order for Cuba to benefit. 相似文献
7.
We use a unique firm-level data set including 9000 companies from 26 European Union countries covering four different sectors to take a close look at the relationship between online exports and productivity. The online exporter productivity premium is estimated using different techniques (ordinary least squares, quantile regressions and robust estimation). Results consistently indicate that the estimated online exporter productivity premium is statistically different from zero, positive and significant from an economic point of view. European online exporters, according to these results, are approximately 2% more productive than non-online exporters. Productivity differences between firms could be related to variables that are not included in the empirical model. More research would be needed to address this issue in the future. 相似文献
8.
9.
I. E. Ilina E. N. Zharova S. P. Burlankov 《Studies on Russian Economic Development》2018,29(2):207-213
This paper presents an approach to assessing the efficacy of public spending on research and development in state programs. At present, there is a need to develop a unified approach to the analysis and evaluation of the efficacy of such spending from the perspective of participants in state programs (federal executive bodies). The proposed approach does not allow evaluating the efficacy of public spending on the development of research areas assigned to the authors. 相似文献
10.
We study the exploitation of a common groundwater resource, first as a static and then as a differential game, in order to take into account the strategic and dynamic interactions among the users of the resource. We suppose that firms can form coalitions or can decide not to cooperate. The non-cooperation regime is characterized by pumping that lead to depletion of the aquifer; the cooperation preserves the resource. Open-loop and feedback equilibria have been computed and compared in order to characterize the existence of cooperators and defectors in water resources management. 相似文献