全文获取类型
收费全文 | 4619篇 |
免费 | 82篇 |
国内免费 | 6篇 |
专业分类
财政金融 | 1339篇 |
工业经济 | 273篇 |
计划管理 | 473篇 |
经济学 | 1005篇 |
综合类 | 286篇 |
运输经济 | 70篇 |
旅游经济 | 85篇 |
贸易经济 | 599篇 |
农业经济 | 80篇 |
经济概况 | 497篇 |
出版年
2024年 | 2篇 |
2023年 | 55篇 |
2022年 | 105篇 |
2021年 | 137篇 |
2020年 | 183篇 |
2019年 | 155篇 |
2018年 | 127篇 |
2017年 | 146篇 |
2016年 | 150篇 |
2015年 | 109篇 |
2014年 | 208篇 |
2013年 | 301篇 |
2012年 | 248篇 |
2011年 | 367篇 |
2010年 | 242篇 |
2009年 | 327篇 |
2008年 | 401篇 |
2007年 | 312篇 |
2006年 | 321篇 |
2005年 | 207篇 |
2004年 | 149篇 |
2003年 | 122篇 |
2002年 | 86篇 |
2001年 | 57篇 |
2000年 | 43篇 |
1999年 | 43篇 |
1998年 | 26篇 |
1997年 | 19篇 |
1996年 | 7篇 |
1995年 | 8篇 |
1994年 | 10篇 |
1993年 | 13篇 |
1992年 | 3篇 |
1991年 | 5篇 |
1989年 | 1篇 |
1987年 | 1篇 |
1985年 | 4篇 |
1984年 | 1篇 |
1983年 | 4篇 |
1982年 | 1篇 |
1979年 | 1篇 |
排序方式: 共有4707条查询结果,搜索用时 15 毫秒
951.
《Telecommunications Policy》2019,43(3):262-277
The issue of disruptive operators has recently gained interest among researchers and regulators. From a regulator's perspective, disruptive operators can increase competitive rivalry in markets dominated by a handful of large companies, thereby allowing consumers to obtain more benefits in terms of price and quality. Largely overlooked in this discussion has been the impact that the specific identity, complementary assets of operators, and their strategies have on the marketplace dynamics. In this paper we explore the impact that one such operator – Free Mobile – has had on the French mobile telecommunications market. Drawing on a wide range of secondary sources, our analysis finds that the entry and subsequent growth of Free Mobile has had a complex and multi-faceted impact on the market. Their growth has been at the expense of the other three mobile network operators active in the French market, while their innovative business model, which enables it to compete on the basis of low costs, has been copied by its rivals. The specific characteristics of Free Mobile and of its strategy have contributed to a significantly alteration to how competition occurs in this market. This, in turn, triggers a strong incentive for restructuring, which is actually restrained by regulatory concerns. 相似文献
952.
《Telecommunications Policy》2019,43(9):101814
Net neutrality rules have been implemented in many developed countries, often in response to concerns over network operator market power and potential blocking or throttling of content. However, developing countries typically have significantly lower levels of internet penetration and usage. Market power in respect of internet access looks quite different given that mobile is the predominant means of connection and there are often three or more mobile operators. In South Africa, there is a quasi-monopoly in the paid satellite broadcasting market and broadband providers zero-rating content from third parties (such as Netflix) may bring about more competition. We test the main theories of harm arising in the net neutrality debate, including network operator market power and exclusion among content providers using data on the number of announced prefixes and peers and IP addresses and considering examples of bundling and zero-rating conduct by operators. We find that net neutrality rules are less likely to be required in South Africa and other developing countries and that strict enforcement of such rules could in fact hinder competition in markets for content, telecommunications networks and other related markets. 相似文献
953.
《Telecommunications Policy》2017,41(10):931-947
Over the past two decades, China’s telecommunications industry has witnessed drastic market reform, steadfast institutionalization, and volatile technological changes, which have driven exponential industry expansion. This paper offers an updated longitudinal and comprehensive review on this reform process on the eve of 5G (the fifth generation mobile communications networks). First, the paper segments the two-decade reform crusade into discernible phases, each of which is embedded with different policy drives. These reform phases are then pattern-matched against the subtleties of the overall institutional, technological, and market backdrop. A series of policy issues are identified through a systematic examination of industry phenomena over the reform course. Finally, the status of research is assessed regarding China’s telecom industry and reform, based on which, knowledge gaps are identified and future research agenda suggested. Conclusions are made regarding future reform and research imperatives. The paper advances the understanding of China’s telecom reform, development, and the underlying policy issues. It updates and expands previous works on similar topics. Overall, this study provides important theoretical, managerial, and policy implications. 相似文献
954.
《Telecommunications Policy》2017,41(10):978-990
This article conjectures that the legacy industry-specific regulation that has governed the telecommunications sector for a long time is in basic conflict with the dynamics and product innovations that characterize the modern information and communications technology (ICT) sector. Reasons for the failure of legacy regulation to promote product innovations are explained and proposals for alternatives, such as deregulation and regulatory reform are discussed. Both regulation and competition policy are more difficult for ICT than for other sectors. Therefore both, regulation and competition policy may need reforms in order to deal with new problems. The most drastic and most realistic alternative to legacy-type regulation remains deregulation and a move to competition policy. Symmetric regulation, smart regulation, quasi-Coasean approaches and subsidies all have some limited applicability to specific situations, but are all associated with complications that have to be resolved, while competition policy is a comprehensive alternative. Last-mile access and gatekeeper access are analyzed as two main areas of legacy regulation, which are in danger of being exported to other ICT areas. Such exports may negatively affect the dynamics of the ICT industry. Rather than being exported, legacy regulations should be reduced in order to enhance product innovations. 相似文献
955.
We establish that the effect of intensified deposit market competition, measured by reduced switching costs, on the probability of bank failures depends critically on whether we focus on competition with established customer relationships or competition for the formation of such relationships. With inherited customer relationships, intensified competition due to lower switching costs destabilizes the banking market, whereas it stabilizes the market if we focus on competition for the formation of customer relationships. We characterize the factors important for evaluating the effects of intensified competition on stability in a market with unattached as well as locked-in depositors. 相似文献
956.
We examine the informativeness of quarterly disclosed portfolio holdings across four institutional investor types: hedge funds, mutual funds, pension funds and private banking firms. Overweight positions outperform underweight positions only for hedge funds. By decomposing holdings and stock returns, we find that hedge funds are superior to other institutional investors both at picking industries and stocks and that they are better at forecasting long‐term as well as short‐term returns. Furthermore, our results show that hedge funds, mutual funds and pension funds are able to successfully time the market. The outperformance of hedge funds is not explained by a liquidity premium. 相似文献
957.
This paper examines how the Chinese stock market acts differently towards state‐controlled and market‐oriented media coverage. Using a setting of post‐earnings announcement drift, we find that information from state‐controlled media enters the stock price in a timelier manner, while the message from market‐oriented media needs more time to get a response from investors. The effect is also influenced by whether the type of news coverage is good or bad. Our findings suggest that the capital market underreacts when good news is reported by the market‐oriented media. 相似文献
958.
This paper examines how competition among suppliers affects their willingness to provide trade credit financing. Trade credit extended by a supplier to a cash constrained retailer allows the latter to increase cash purchases from its other suppliers, leading to a free rider problem. A supplier that represents a smaller share of the retailer’s purchases internalizes a smaller part of the benefit from increased spending by the retailer and, as a result, extends less trade credit relative to its sales. In consequence, retailers with dispersed suppliers obtain less trade credit than those whose suppliers are more concentrated. The free rider problem is especially detrimental to a trade creditor when the free-riding suppliers are its product market competitors, leading to a negative relation between product substitutability among suppliers to a given retailer and trade credit that the former provide to the latter. We test the model using both simulated and real data. The estimated relations are consistent with the model’s predictions and are statistically and economically significant. 相似文献
959.
We evaluate Eugene F. Fama's claim that stock prices do not exhibit price bubbles. Based on US industry returns (1926?2014) and international sector returns (1985?2014), we present four findings (1) Fama is correct in that a sharp price increase of an industry portfolio does not, on average, predict unusually low returns going forward; (2) such sharp price increases predict a substantially heightened probability of a crash but not of a further price boom; (3) attributes of the price run-up, including volatility, turnover, issuance, and the price path of the run-up, help forecast an eventual crash; and (4) these attributes also help forecast future returns. Results hold similarly in US and international samples. 相似文献
960.
《Food Policy》2014
Public–private partnerships are increasingly seen as an important tool to build agri-food supply chains and develop markets for agri-food products in emerging economies. However, many of these initiatives fail when the public component of the program ends. One exception is the USDA Market Assistance Program (MAP) that facilitated the redevelopment of the Armenian dairy sector after privatization. This paper presents a case study of this initiative and hypothesize that the USDA MAP facilitated farmer investment in private enforcement capital. This investment resulted in sustainable market relationships between farmers and dairy processors even after the USDA MAP expired. We find empirical evidence to support this hypothesis using a panel dataset collected from 172 Armenian dairy farmers in 2004 and 2009. 相似文献