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   12352篇
  免费   287篇
  国内免费   51篇
财政金融   1594篇
工业经济   802篇
计划管理   2506篇
经济学   2434篇
综合类   1201篇
运输经济   91篇
旅游经济   76篇
贸易经济   1396篇
农业经济   769篇
经济概况   1794篇
信息产业经济   4篇
邮电经济   23篇
  2024年   30篇
  2023年   108篇
  2022年   260篇
  2021年   372篇
  2020年   334篇
  2019年   208篇
  2018年   175篇
  2017年   301篇
  2016年   217篇
  2015年   333篇
  2014年   426篇
  2013年   598篇
  2012年   991篇
  2011年   1430篇
  2010年   1271篇
  2009年   877篇
  2008年   897篇
  2007年   867篇
  2006年   958篇
  2005年   836篇
  2004年   258篇
  2003年   206篇
  2002年   213篇
  2001年   206篇
  2000年   104篇
  1999年   68篇
  1998年   32篇
  1997年   25篇
  1996年   16篇
  1995年   9篇
  1994年   8篇
  1993年   14篇
  1992年   9篇
  1991年   9篇
  1990年   3篇
  1989年   6篇
  1988年   4篇
  1987年   4篇
  1984年   5篇
  1981年   2篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
While a firm can choose to develop an innovation internally or externally, the internal knowledge development and external knowledge acquisition tend to interact with each other in the innovation process. The present study examines whether internal technological strength and external competitor alliance participation serve as complements or substitutes in innovation development. Built on the knowledge‐based view, this study offers a contingency perspective on the nature of knowledge integration between internal technological strength and external alliance relationships, and how they jointly influence radical and incremental innovation differently. Adopting a random effect negative binomial model specification, a panel data set of 64 pharmaceutical firms over a 15‐year period were used to test the hypothesized effects. The findings indicate that internal technological knowledge strength has an inverted U‐shaped relationship with radical and incremental innovation. More importantly, the findings also demonstrate that the combined effect of internal and external sources of innovation can have differential effects on radical and incremental innovation development. Specifically, competitor alliance participation strengthens the effect of internal technological strength on incremental product innovation while it weakens the above effect on radical product innovation. This suggests that internal and external sources of innovation may complement each other for incremental innovation while they may represent trade‐offs for radical innovation development. The above findings provide empirical evidence for the complexity of pursuing organizational ambidexterity in innovation generation and highlight the importance of balancing the internal and external knowledge sources in pursuing innovation.  相似文献   
992.
In this paper we studyy arithmetic Asian options when the underlying stock is driven by special semimartingale processes. We show that the inherently path dependent problem of pricing Asian options can be transformed into a problem without path dependence in the payoff function. We also show that the price is driven by a process with independent increments, Levy processes being a special case. This approach applies for both discretely or continuously options.  相似文献   
993.
许多西方文献研究认为房价从长期看由经济基本面决定,并通过均衡价格理论进行了论证。但本文利用1998~2010年中国房地产季度统计数据分析,发现我国房价与经济基本面缺乏稳定的协整关系;我国房地产价格趋势偏离了局部均衡分析的均衡价格,且房价供求决定方程发生了结构性改变。中国特殊的房地产市场,尤其是受土地政策和心理预期因素影响,很大程度上逼近于一种投机品市场。本文以资源经济学中著名的霍太林法则为基础建立模型,计量分析发现,从阶段特征看心理预期对房价有显著的正向影响;土地供给和房屋租价比、银行利率对房价有显著的负向影响,并提出相应的政策建议。  相似文献   
994.
虚拟维修   总被引:1,自引:0,他引:1  
虚拟维修的特性及技术体系,对吊钩的虚拟拆卸及其模型进行分析。在大型复杂设备或影响安全的维修工作中,都可以运用虚拟维修达到快速维修和控制维修项目风险的目标。  相似文献   
995.
井购是市场经济体制下的一种产权交易活动,是并购双方在追求各自利益最大化前提下所进行的信号博弈过程。由于企业井购双方信息不对称性所导致的逆向选择,企业并购市场会出现分离均衡、混同均衡和准分离均衡三种状态,其中只有分离均衡是最理想和最有效率的均衡。文章建立了目标企业与并购企业之间的信号传递博弈模型,提出克服并购双方信息的不对称性和对目标企业进行合理估价是实现分离均衡的最有效方法。  相似文献   
996.
国有资金投资的建设工程招标,必须编制招标控制价(最高投标限价)[1],概预算定额在今后相当长的一段时间内还是最高投标限价的编制基础,估算指标还处于不断补充、不断更新的过程,有的地方甚至缺乏完整的体系.在完善工程计价依据,加强工程造价数据积累及施工合同履约管理的过程中,工程招标投标及最高投标限价如何自主报价、竞争定价成为...  相似文献   
997.
In recent years, an increasing number of Chinese firms have been engaged in acquisitions both inside and outside of China. Nevertheless, our understanding of Chinese merger and acquisition (M&A) activity is limited because a majority of M&As in the past 100 years have been performed by firms from developed countries and it is those M&As that have been the focus of prior research. Thus this paper aims to address the following research questions: What are the new insights gained from Chinese M&A research? What are the emerging future directions of Chinese M&A research? To address those questions, this article provides a thorough literature review of the most recent M&A research in top journals and studies of M&As both inside and outside of China. Consequently, we identify both new insights from Chinese M&A research and the research gaps that Chinese M&A research needs to fulfill compared with general M&A research in top journals. We further highlight the important and unique characteristics of Chinese M&As and call for future research.  相似文献   
998.
999.
One of the central puzzles of signaling theory is how to assess signal quality, in particular the potential for signal mimicking. Our study provides evidence of signal mimicking in the context of stock repurchases. Employing an ex-ante proxy for the likelihood of mimicking stock repurchases and data on open market stock repurchases from 30 countries, we find that long-term operating and market performance following stock repurchases improve less for suspected mimicking firms. This finding contradicts the conventional characterization that managers use stock repurchases to signal undervaluation and enhanced future performance. We find that mimicking firms have smaller capital investments, need greater external financing, buy back fewer shares, and issue more new shares (and/or resell more treasury shares) in the year of the repurchase. Our analysis further shows that mimicking is more likely in countries with weak investor protections and in firms with higher ownership concentration. Further, mimicking associated with concentrated ownership is mitigated in countries with stronger investor protections and by the adoption of International Financial Reporting Standards (IFRS). Altogether, our findings provide evidence of signal mimicking in stock repurchases in international data that is influenced by market, ownership, legal, and financial reporting characteristics of countries.  相似文献   
1000.
The asset growth effect: Insights from international equity markets   总被引:1,自引:0,他引:1  
Firms with higher asset growth rates subsequently experience lower stock returns in international equity markets, consistent with the U.S. evidence. This negative effect of asset growth on returns is stronger in more developed capital markets and markets where stocks are more efficiently priced, but is unrelated to country characteristics representing limits to arbitrage, investor protection, and accounting quality. The evidence suggests that the cross-sectional relation between asset growth and stock return is more likely due to an optimal investment effect than due to overinvestment, market timing, or other forms of mispricing.  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