首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   24164篇
  免费   583篇
  国内免费   476篇
财政金融   4585篇
工业经济   1247篇
计划管理   3880篇
经济学   5488篇
综合类   1181篇
运输经济   576篇
旅游经济   1150篇
贸易经济   4265篇
农业经济   1042篇
经济概况   1809篇
  2024年   30篇
  2023年   1320篇
  2022年   1329篇
  2021年   1394篇
  2020年   1955篇
  2019年   974篇
  2018年   680篇
  2017年   1587篇
  2016年   1544篇
  2015年   1252篇
  2014年   1963篇
  2013年   1937篇
  2012年   1807篇
  2011年   1558篇
  2010年   1175篇
  2009年   1126篇
  2008年   433篇
  2007年   742篇
  2006年   708篇
  2005年   361篇
  2004年   177篇
  2003年   182篇
  2002年   206篇
  2001年   237篇
  2000年   168篇
  1999年   211篇
  1998年   38篇
  1997年   14篇
  1996年   20篇
  1995年   5篇
  1994年   3篇
  1993年   8篇
  1992年   4篇
  1991年   6篇
  1990年   7篇
  1989年   4篇
  1988年   4篇
  1987年   6篇
  1986年   3篇
  1985年   7篇
  1984年   23篇
  1983年   4篇
  1982年   2篇
  1981年   1篇
  1980年   1篇
  1978年   1篇
  1977年   3篇
  1976年   1篇
  1975年   1篇
  1974年   1篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
In the digital age, open innovation is increasingly organized around platform ecosystems. This paper investigates how firms can coordinate open innovation as a platform strategy for the development of complementary products by independent third parties. We draw on a qualitative case study of Philips Hue – a connected lighting platform for consumers with its variety of complementary products. We identify three increasingly complex ways in which independent complements connect to a focal platform. Our findings show that managing these connections requires a hybrid open innovation approach that combines arm’s length coordination, with a large number of complementors through open interfaces, and intensive bilateral collaboration, with a selected number of partners. Our findings demonstrate that complex interconnections across digital platforms and products lead to the management challenge of navigating an ‘ecology of platforms’, which warrants future research.  相似文献   
72.
This article demonstrates that entry deterrence can occur when downstream incumbents hold non-controlling ownership shares of a supplier that does not price-discriminate. Such backward ownership implies a rebate on the input price for the incumbents and a competitive disadvantage for downstream entrants. An industry can use non-controlling ownership to change the pricing of a supplier in a way that appears to be accommodating but in fact deters entry. The supplier benefits from an obligation or a commitment to supply the customers under equal terms, as this induces profitable sales of ownership stakes to incumbent downstream firms.  相似文献   
73.
企业、企业家等微观主体对货币政策的反应,在较大程度上影响货币政策的效果。货币政策可通过对企业家信心的影响,进而对公司投资效率产生作用。基于中国2007—2016年40个季度A股上市公司样本的实证研究表明:企业家信心在货币政策传导过程中有不可忽视的作用。企业家信心增强或者货币政策宽松时会加剧过度投资,减轻投资不足;企业家信心减弱或者货币政策紧缩时可以有效抑制过度投资,但会加剧投资不足。其中,国有企业对企业家信心和货币政策松紧的敏感性更强。进一步,货币政策对企业投资效率的影响,也会通过货币政策和企业家信心的交互作用而发挥作用。这种作用在国有企业和非国有企业之间无显著差异。  相似文献   
74.
The aim of the paper is to identify which among the aspects that relate to the composition of the student body, school (district) size, management practices and the school principals' own characteristics are associated with the performance of Italian students at grade 8, measured through standardised test scores in reading and mathematics. The analysis makes use of a student-level efficiency model, and several school level variables are included as explanators for efficiency scores. The results show that, especially for reading, the most influential variables relate to the composition of the student body, while the students' performance in mathematics is partly correlated with the management practices adopted by the school principal/head teacher. Schools and schooling can only explain a minor part of the variance in achievement scores, however, and the characteristics of the students themselves play the most significant role.  相似文献   
75.
Supply chain disintegration is considered, due to its importance as an enabler for the management of technology innovation. This research is urgent as it is relevant to a wide range of other occurrences outside of technology innovation management, including: major policy or regulatory changes, industrial actions, economic sanctions, trade wars, trade realignment – such as Brexit, natural disasters, civil disorder and conflict, and financial crises. Disintegration is the re-alignment of partners and coordination within a supply chain to enhance customer value. This process is driven by one of more of the following: introduction of new technology or input, elimination of existing technology or input, change in customer requirements, and/or change in other external factors. The interdisciplinary nature and intellectual foundations of disintegration are considered. Finally, areas of research need are offered.  相似文献   
76.
Flash sale (FS) is a new business model that offers discounted products in limited numbers over a short period. In this paper we discuss the impact of strategic consumers on advance selling (AS) of new products on FS platforms. We first study the impact of strategic consumers on competing retailers adopting AS to sell a homogeneous new product. And find that the retailers’ AS profits and inventory quantities decrease with the strategic customers’ valuation and valuation decreasing rate. Then we analyse whether FS can mitigate the impact of strategic customers on retailers adopting AS for new products. We consider a newsvendor model involving only one retailer adopting AS to sell a new product. We derive the results by comparing this model with two counterpart models, namely the classical newsvendor model with no strategic customers and a newsvendor model with strategic customers where the retailer does not use FS under AS.  相似文献   
77.
This paper proposes a predictive CoVaR measure to analyze asynchronous risk spillovers between the Chinese stock and futures market. We jointly model the intraday CoVaR dynamics using an extended MV-CAViaR model. The results show the presence of asymmetric spillovers under different market states, different trading rules, and different confidence levels. Specifically, there exist significant downside spillovers and insignificant upside spillovers. Moreover, the futures (stock) market becomes dominant in risk transmission during bearish (bullish) market periods. Furthermore, high margin requirements would weaken the spillover effects of the futures market, but it would also strengthen the spillover effects of the stock market.  相似文献   
78.
This paper studies the extent to which equilibrium land auction prices are pushed up sequentially due to strategic bidding behaviors in government land auction sales. Using a unique dataset that covers the universe of tendering prices submitted by all developers for all residential land auction sales in Singapore, we find that a tenderer’s bids are significantly higher where there was a previous land parcel sold within two years and located within four kilometers. The identified price margin decreases with time and geographic distance. Tracking sequential bids submitted by the same developer over time, we find that the incumbent winner of a previous auction is more likely to participate in subsequent nearby land sales as compared to the second-highest bidder of the same auction. However, it does not necessarily win the subsequent sites. We argue that the incumbent deliberately bids up the subsequent land prices to gain pricing advantages to their own parcels.  相似文献   
79.
80.
The Chinese high-tech industry has developed greatly since the beginning of China's “National High-tech R&D (863) Program” and “China Torch Program”. This paper introduces a conceptual model extended from the innovation value chain model to simultaneously estimate the R&D and commercialization efficiencies for the high-tech industries of 29 provincial-level regions in China. To match reality, a network DEA incorporating both shared inputs and additional intermediate inputs is constructed to open the “black box” view of decision making units used in single-stage DEA. This study is the first attempt to link the R&D and commercialization with a solid theoretical foundation and feasible mathematical methods. The empirical findings show that most of the 29 regions have low efficiency in the commercialization sub-process compared to the R&D sub-process, although there are regional differences in China's high-tech industry. Pearson correlation shows that the R&D sub-process is not closely correlated to the commercialization sub-process in terms of efficiency. Our analysis can provide information for the formulation of policies to achieve high innovation efficiency.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号