全文获取类型
收费全文 | 151513篇 |
免费 | 3529篇 |
国内免费 | 17篇 |
专业分类
财政金融 | 27569篇 |
工业经济 | 12570篇 |
计划管理 | 24642篇 |
经济学 | 32014篇 |
综合类 | 2985篇 |
运输经济 | 1108篇 |
旅游经济 | 2628篇 |
贸易经济 | 25041篇 |
农业经济 | 7039篇 |
经济概况 | 19150篇 |
信息产业经济 | 7篇 |
邮电经济 | 306篇 |
出版年
2021年 | 1265篇 |
2020年 | 2051篇 |
2019年 | 2641篇 |
2018年 | 2558篇 |
2017年 | 2903篇 |
2016年 | 3008篇 |
2015年 | 2477篇 |
2014年 | 3953篇 |
2013年 | 16165篇 |
2012年 | 5369篇 |
2011年 | 5902篇 |
2010年 | 5296篇 |
2009年 | 5357篇 |
2008年 | 5040篇 |
2007年 | 4246篇 |
2006年 | 4843篇 |
2005年 | 4591篇 |
2004年 | 3389篇 |
2003年 | 3178篇 |
2002年 | 3125篇 |
2001年 | 2824篇 |
2000年 | 2635篇 |
1999年 | 2529篇 |
1998年 | 2337篇 |
1997年 | 2339篇 |
1996年 | 2198篇 |
1995年 | 1986篇 |
1994年 | 2018篇 |
1993年 | 1984篇 |
1992年 | 2030篇 |
1991年 | 1908篇 |
1990年 | 1796篇 |
1989年 | 1674篇 |
1988年 | 1611篇 |
1987年 | 1602篇 |
1986年 | 1679篇 |
1985年 | 2438篇 |
1984年 | 2325篇 |
1983年 | 2110篇 |
1982年 | 1977篇 |
1981年 | 1910篇 |
1980年 | 1880篇 |
1979年 | 1810篇 |
1978年 | 1634篇 |
1977年 | 1625篇 |
1976年 | 1391篇 |
1975年 | 1278篇 |
1974年 | 1188篇 |
1973年 | 1187篇 |
1972年 | 901篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
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
2.
3.
4.
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
5.
6.
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
7.
8.
This article explores the adoption of new technology in organisations that provide senior citizen care. Inspired by Niklas Luhmann’s systems theory, we study how technology reduces complexity by identifying client needs and ensuring predictability in service delivery. However, how technologies are adopted in practice is not determined by technology since it is also structured by care-workers' continuous decision-making. Against this backdrop, we explore how technologies alter the conditions for decision-making in two settings of elderly care, and we describe how care workers seek to adapt technologies to their practical needs as well as conception of care ethics. Developing a systems theory approach, the article eschews a priori assumptions of technological constraint on care-workers’ professional autonomy, offering a more open-ended exploration of diversified strategies for coping with new technology. Our case studies show that employees develop diversified strategies for technology adoption, including both non-usage, heated resistance, excessive embrace, and creative adaption. 相似文献
9.
Julian A. Parra‐Polania 《The German Economic Review》2019,20(4):e1019-e1027
Forward guidance can be provided as an unconditional promise, i.e. commitment to a specific low policy rate. Alternatively, the promise may include an escape clause, i.e. a condition defining the state of the economy under which the central bank would not keep such a low rate and, instead, it would revert to setting policy under discretion. The escape clause can be expressed as a threshold in terms of a specific variable. The present paper shows that, when such a threshold is expressed in terms of an endogenous variable (e.g. output, inflation), there are cases where it becomes impossible for the central bank to act in a way that is consistent with its promise. Consistency imposes limits on the policy rate that can be set since reverting immediately to the optimal discretionary rate can be incompatible with exceeding the threshold. 相似文献
10.