全文获取类型
收费全文 | 33197篇 |
免费 | 607篇 |
专业分类
财政金融 | 5958篇 |
工业经济 | 1920篇 |
计划管理 | 5268篇 |
经济学 | 7640篇 |
综合类 | 615篇 |
运输经济 | 161篇 |
旅游经济 | 270篇 |
贸易经济 | 7289篇 |
农业经济 | 716篇 |
经济概况 | 3338篇 |
信息产业经济 | 46篇 |
邮电经济 | 583篇 |
出版年
2023年 | 147篇 |
2021年 | 152篇 |
2020年 | 300篇 |
2019年 | 362篇 |
2018年 | 2719篇 |
2017年 | 2535篇 |
2016年 | 1696篇 |
2015年 | 416篇 |
2014年 | 567篇 |
2013年 | 2265篇 |
2012年 | 976篇 |
2011年 | 2434篇 |
2010年 | 2313篇 |
2009年 | 2014篇 |
2008年 | 1936篇 |
2007年 | 2201篇 |
2006年 | 456篇 |
2005年 | 714篇 |
2004年 | 760篇 |
2003年 | 865篇 |
2002年 | 548篇 |
2001年 | 363篇 |
2000年 | 361篇 |
1999年 | 308篇 |
1998年 | 339篇 |
1997年 | 279篇 |
1996年 | 248篇 |
1995年 | 227篇 |
1994年 | 247篇 |
1993年 | 250篇 |
1992年 | 275篇 |
1991年 | 260篇 |
1990年 | 208篇 |
1989年 | 193篇 |
1988年 | 169篇 |
1987年 | 166篇 |
1986年 | 184篇 |
1985年 | 253篇 |
1984年 | 271篇 |
1983年 | 252篇 |
1982年 | 227篇 |
1981年 | 202篇 |
1980年 | 174篇 |
1979年 | 170篇 |
1978年 | 159篇 |
1977年 | 134篇 |
1976年 | 127篇 |
1975年 | 142篇 |
1974年 | 106篇 |
1973年 | 102篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
Quality & Quantity - Within-subject designs (WSDs) remain unpopular in psychology. Social psychologists have argued that they create “demand” and “order” effects.... 相似文献
12.
13.
14.
We explore the innovation performance benefits of alliances for spin-off firms, in particular spin-offs either from other firms or from public research organizations. During the early years of the emerging combinatorial chemistry industry, the industry on which our empirical analysis focuses, spin-offs engaged in alliances with large and established partners, partners of similar type and size, and with public research organizations, often for different reasons. We seek to understand to what extent alliances of spin-offs with other firms (either large- or small- and medium-sized firms) affected their innovation performance and also how this performance may have been affected by their corporate or public research background. We find evidence that in general alliances of spin-offs with other firms, in particular alliances with large firms, increased their innovation performance. Corporate spin-offs that formed alliances with other firms outperformed public research spin-offs with such alliances. This suggests that, in terms of their innovation performance, corporate spin-offs that engaged in alliances with other firms seemed to have benefitted from their prior corporate background. Interestingly, it turns out that the negative impact of alliances on the innovation performance of public research spin-offs was largely affected by their alliances with small- and medium-sized firms. 相似文献
15.
Farasat A. S. Bokhari Franco Mariuzzo Arnold Polanski 《Journal of Economics & Management Strategy》2020,29(3):516-542
During patent litigation, pay‐for‐delay (P4D) deals involve a payment from a patent holder of a branded drug to a generic drug manufacturer to delay entry and withdraw the patent challenge. In return for staying out of the market, the generic firm receives a payment, and/or an authorized licensed entry at a later date, but before the patent expiration. We examine why such deals are stable when there are multiple potential entrants. We combine the first‐mover advantage for the first generic with the ability of the branded manufacturer to launch an authorized generic (AG) to show when P4D deals are an equilibrium outcome. We further show that limiting a branded firm's ability to launch an AG before entry by a successful challenger will deter such deals. However, removing exclusivity period for the first generic challenger will not. 相似文献
16.
Domènec Melé 《Business ethics (Oxford, England)》2021,30(4):772-783
While many studies on the Fourth Industrial Revolution (FIR) focus on efficiency, productivity and economic progress, only a few have considered its ethical aspects. This article tries to contribute to filling this vacuum by providing a comprehensive approach to ethical risks at the workplace. Drawing upon Catholic social teaching (CST)—addressed to all people of good will—it analyzes ethical aspects at the workplace posited by the FIR, and more particularly by Industry 4.0, which is at the core of this revolution. CST emphasizes the dignity of the worker and the necessity to flourish at the workplace. While robots, artificial intelligence, and interconnected technologies are only instrumental, the real subject of work is the worker. This casts specific light on the ethical issues analyzed, including effects on employment, wages and inequality, human quality treatment, relational aspects, safety and health, surveillance on employees, and meaningful work. 相似文献
17.
Adam S. Hayes 《Applied economics letters》2019,26(7):554-560
This study back-tests a marginal cost of production model proposed to value the digital currency Bitcoin. Results from both conventional regression and vector autoregression (VAR) models show that the marginal cost of production plays an important role in explaining Bitcoin prices, challenging recent allegations that Bitcoins are essentially worthless. Even with markets pricing Bitcoin in the thousands of dollars each, the valuation model seems robust. The data show that a price bubble that began in the Fall of 2017 resolved itself in early 2018, converging with the marginal cost model. This suggests that while bubbles may appear in the Bitcoin market, prices will tend to this bound and not collapse to zero. 相似文献
18.
19.
20.