全文获取类型
收费全文 | 29026篇 |
免费 | 920篇 |
国内免费 | 148篇 |
专业分类
财政金融 | 4109篇 |
工业经济 | 1847篇 |
计划管理 | 5754篇 |
经济学 | 5592篇 |
综合类 | 1944篇 |
运输经济 | 239篇 |
旅游经济 | 392篇 |
贸易经济 | 5072篇 |
农业经济 | 1512篇 |
经济概况 | 3451篇 |
信息产业经济 | 7篇 |
邮电经济 | 175篇 |
出版年
2023年 | 137篇 |
2022年 | 281篇 |
2021年 | 488篇 |
2020年 | 484篇 |
2019年 | 427篇 |
2018年 | 613篇 |
2017年 | 706篇 |
2016年 | 670篇 |
2015年 | 748篇 |
2014年 | 1053篇 |
2013年 | 2337篇 |
2012年 | 1587篇 |
2011年 | 1868篇 |
2010年 | 1842篇 |
2009年 | 1468篇 |
2008年 | 1609篇 |
2007年 | 1502篇 |
2006年 | 1453篇 |
2005年 | 1247篇 |
2004年 | 631篇 |
2003年 | 562篇 |
2002年 | 524篇 |
2001年 | 498篇 |
2000年 | 399篇 |
1999年 | 315篇 |
1998年 | 300篇 |
1997年 | 296篇 |
1996年 | 302篇 |
1995年 | 264篇 |
1994年 | 250篇 |
1993年 | 282篇 |
1992年 | 262篇 |
1991年 | 244篇 |
1990年 | 238篇 |
1989年 | 197篇 |
1988年 | 152篇 |
1987年 | 185篇 |
1986年 | 186篇 |
1985年 | 276篇 |
1984年 | 287篇 |
1983年 | 269篇 |
1982年 | 250篇 |
1981年 | 253篇 |
1980年 | 214篇 |
1979年 | 211篇 |
1978年 | 165篇 |
1977年 | 170篇 |
1976年 | 155篇 |
1975年 | 127篇 |
1974年 | 112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.
Growing urbanisation in South Africa is reflected in burgeoning Working class and informal township settlements on the fringes of its major towns and cities. Paired with this is an increasing reliance on cash as the primary means of economic transaction, which has in turn stimulated the growth of micro-enterprise business activities within the township context. This article discusses the findings of an eight-township small-area census which occurred between 2010 and 2013 in Cape Town, Johannesburg, Ekurhuleni and Durban townships representing 250 000 residents. The researchers were able to establish the scope and scale of informal food and drink retailing in these localities. Of the 10 049 micro-enterprises located in the study, some 3966 (or 39% of the total) trade in food. These include enterprises in primary production, fresh produce retailing, grocery retailing from house and spaza shops, and informal foodservice enterprises. Food is the basis for much township informal business and plays an important role in making food increasingly affordable and locally accessible, and in creating cash employment. The article builds on the knowledge base of the township informal economy role in bolstering food security needs for the marginalised. 相似文献
4.
ABSTRACTThe aviation e-service system is an important part of support for business communication in regions covered by Belt and Road initiative. In exploring the role of airline companies in this system, we examine the structure of the network, which consists of airlines interconnections based on small data of individual attributes of aviation companies in aviation e-services, and study these interconnections across different groups using block modeling. The heuristic solution of airline companies in development of international communication and cooperation is further discussed. Among our policy implications for global managers, we suggest the enhancement of cross-regional cooperation among airlines. 相似文献
5.
Joseph Amankwah-Amoah Zaheer Khan Ellis L.C. Osabutey 《International Business Review》2021,30(3):101802
The emergence of the COVID-19 pandemic has adversely affected the fortunes of multiple companies around the globe. Accordingly, questions are increasingly being asked about how organizations can revitalize during and after a crisis. Yet, we have limited understanding of how organizations renew themselves during crises over time. We explore this question through the lens and examination of two South-Asian airlines: Pakistan International Airlines and Sri Lankan Airlines. The cases offer important insights into the reasons behind underperformance of state-controlled enterprises and renewal activities. We shed light on strategic renewal (SR) in the wake of increasing liberalization and deregulations in the global airline industry. To this end, we propose a four-stage approach towards renewing such underperforming organizations to respond effectively to black swan events and external shocks. 相似文献
6.
Societal pressures for greater sustainability can encourage firms to target part of their innovation activities at ecological initiatives (i.e., eco-innovation). Yet, depending on their value function, firms can respond differently to such pressures and exhibit variance in their eco-innovation activities. In this paper, we investigate the idea that a firm’s ownership structure may play a significant role in determining its engagement in eco-innovation. Specifically, we propose that ownership by family blockholders increases the value attached to the company’s reputation and that this, in turn, stimulates higher levels of eco-innovation. In other words, we model the company reputation motive as a key mediator in the relationship between family ownership and firm-level eco-innovation. To account for family firm heterogeneity, we also model the moderating role of owners’ intention to pass the business on to the next family generation (transgenerational intentions) and of the extent to which these owners reside in the firm’s local community (local embeddedness). As theoretical backdrop, our study builds on institutional theory and the mixed gamble logic. To test our hypotheses, we use a large sample of German firms and nonlinear moderated mediation regression analysis. Results reveal that family ownership is positively related to the introduction of eco-innovations by firms, in part because of the stronger emphasis being placed on the company’s reputation. We find that this effect is strongest when the owning-family has transgenerational intentions. As such, this study advances our understanding of firm-level drivers of eco-innovation. In view of the prevalence of family-owned firms and the mounting importance of ecological sustainability, it is valuable to extend knowledge on the contingent and indirect effect of family ownership on eco-innovation. 相似文献
7.
Intereconomics - Only a few years ago, it was a widespread belief that globalisation would trigger processes of democratisation worldwide. However, even old and established democracies such as the... 相似文献
8.
9.
10.