全文获取类型
收费全文 | 23086篇 |
免费 | 371篇 |
国内免费 | 2篇 |
专业分类
财政金融 | 3062篇 |
工业经济 | 1128篇 |
计划管理 | 2626篇 |
经济学 | 3716篇 |
综合类 | 436篇 |
运输经济 | 68篇 |
旅游经济 | 192篇 |
贸易经济 | 3174篇 |
农业经济 | 480篇 |
经济概况 | 2467篇 |
水利工程 | 6073篇 |
信息产业经济 | 3篇 |
邮电经济 | 34篇 |
出版年
2020年 | 169篇 |
2019年 | 215篇 |
2018年 | 1152篇 |
2017年 | 1140篇 |
2016年 | 790篇 |
2015年 | 251篇 |
2014年 | 375篇 |
2013年 | 1524篇 |
2012年 | 710篇 |
2011年 | 1226篇 |
2010年 | 1023篇 |
2009年 | 943篇 |
2008年 | 977篇 |
2007年 | 1184篇 |
2006年 | 480篇 |
2005年 | 543篇 |
2004年 | 570篇 |
2003年 | 500篇 |
2002年 | 383篇 |
2001年 | 284篇 |
2000年 | 302篇 |
1999年 | 273篇 |
1998年 | 304篇 |
1997年 | 277篇 |
1996年 | 284篇 |
1995年 | 238篇 |
1994年 | 249篇 |
1993年 | 261篇 |
1992年 | 295篇 |
1991年 | 299篇 |
1990年 | 246篇 |
1989年 | 237篇 |
1988年 | 210篇 |
1987年 | 232篇 |
1986年 | 239篇 |
1985年 | 279篇 |
1984年 | 252篇 |
1983年 | 276篇 |
1982年 | 242篇 |
1981年 | 260篇 |
1980年 | 278篇 |
1979年 | 246篇 |
1978年 | 247篇 |
1977年 | 260篇 |
1976年 | 255篇 |
1975年 | 223篇 |
1974年 | 223篇 |
1973年 | 188篇 |
1972年 | 168篇 |
1971年 | 171篇 |
排序方式: 共有10000条查询结果,搜索用时 640 毫秒
1.
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
2.
Aaron H. Anglin Jeremy C. Short Will Drover Regan M. Stevenson Aaron F. McKenny Thomas H. Allison 《Journal of Business Venturing》2018,33(4):470-492
We extend the entrepreneurship literature to include positive psychological capital — an individual or organization's level of psychological resources consisting of hope, optimism, resilience, and confidence — as a salient signal in crowdfunding. We draw from the costless signaling literature to argue that positive psychological capital language usage enhances crowdfunding performance. We examine 1726 crowdfunding campaigns from Kickstarter, finding that entrepreneurs conveying positive psychological capital experience superior fundraising performance. Human capital moderates this relationship while social capital does not, suggesting that costly signals may, at times, enhance the influence of costless signals. Post hoc analyses suggest findings generalize across crowdfunding types, but not to IPOs. 相似文献
3.
4.
Without guaranteed compensation, granted by the German Renewable Energy Sources Act (Erneuerbare Energien Gesetz/EEG), biogas plants compete with all other plant types on the market for electrical energy. However, exchange-based electricity products do not currently permit an economically viable operation of biogas plants owing to their cost situation. 相似文献
5.
A. L. Rudenko V. V. Mishakin A. V. Gonchar K. V. Kurashkin A. E. Fomin 《Power Technology and Engineering (formerly Hydrotechnical Construction)》2020,53(6):687-689
At the hydroelectric unit No. 11 of the Nizhnekamsk hydroelectric power plant, the filling wedges of a rotor were investigated by ultrasound in the free st 相似文献
6.
Aleksandrov A. V. 《Power Technology and Engineering (formerly Hydrotechnical Construction)》2021,55(4):477-481
Power Technology and Engineering - The work done on the test site to ensure the operational safety of the powerhouse of the Zagorsk PSP-2 after its leveling is described. The controlled... 相似文献
7.
Bellendir E. N. Aleksandrov A. V. 《Power Technology and Engineering (formerly Hydrotechnical Construction)》2021,55(2):149-154
Power Technology and Engineering - The major results from the survey and geotechnical monitoring during the leveling of the model foundation of the Zagorsk PSP-2 in test site No. 3 are presented.... 相似文献
8.
Prior literature examined reciprocity in the context of value creation. However, research has yet to examine whether reciprocity exists in value sharing. To address this gap, the authors examine retailer’s reciprocal value sharing with its manufacturer in relation to new product introductions. The authors test, via a survey of retail managers, whether reciprocal value sharing is influenced by an interaction of manufacturer’s prior new product success with innovativeness of a manufacturer’s products and the frequency of new product introduction. The results indicate that a retailer’s reciprocal value sharing is greater when the manufacturer historically launched successful new products, and that this effect is decreased with the innovativeness of a manufacturer’s products but increased with the frequency of new product introduction. 相似文献
9.
10.
Axel Berger Tobias Schlager David E. Sprott Andreas Herrmann 《Journal of the Academy of Marketing Science》2018,46(4):652-673
Firms increasingly use games to interact with their customers. Yet, surprisingly little is known about whether, when, and how such “gamified” interactions engage consumers with a firm’s brand, thereby facilitating self–brand connections. Building on flow theory, we show that gamified interactions that are highly interactive and optimally challenging facilitate self–brand connections, because such games lead to emotional and cognitive brand engagement. A field study and three experiments across various product domains and game designs support our theory. We also identify conditions under which consumers do not become engaged with a brand, namely when firms restrict their decisional control either to voluntarily participate in the game (i.e., compulsory play) or to spend as much time as desired playing the game (i.e., time pressure). Our findings advance existing knowledge about the use of games in marketing and provide important implications for how marketers can harness their potential to build self–brand connections. 相似文献