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   41488篇
  免费   663篇
  国内免费   57篇
财政金融   6767篇
工业经济   2527篇
计划管理   6722篇
经济学   8964篇
综合类   1649篇
运输经济   216篇
旅游经济   332篇
贸易经济   8187篇
农业经济   1246篇
经济概况   4927篇
信息产业经济   47篇
邮电经济   624篇
  2023年   142篇
  2022年   180篇
  2021年   320篇
  2020年   378篇
  2019年   382篇
  2018年   2752篇
  2017年   2627篇
  2016年   1756篇
  2015年   565篇
  2014年   725篇
  2013年   2317篇
  2012年   1489篇
  2011年   3209篇
  2010年   2893篇
  2009年   2520篇
  2008年   2494篇
  2007年   2748篇
  2006年   1033篇
  2005年   1247篇
  2004年   992篇
  2003年   1140篇
  2002年   732篇
  2001年   554篇
  2000年   444篇
  1999年   354篇
  1998年   352篇
  1997年   323篇
  1996年   361篇
  1995年   312篇
  1994年   309篇
  1993年   266篇
  1992年   289篇
  1991年   296篇
  1990年   261篇
  1989年   225篇
  1988年   218篇
  1987年   176篇
  1986年   256篇
  1985年   326篇
  1984年   323篇
  1983年   297篇
  1982年   292篇
  1981年   275篇
  1980年   242篇
  1979年   253篇
  1978年   220篇
  1977年   196篇
  1976年   168篇
  1975年   158篇
  1974年   146篇
排序方式: 共有10000条查询结果,搜索用时 453 毫秒
11.
Without guaranteed compensation, granted by the German Renewable Energy Sources Act (Erneuerbare Energien Gesetz/EEG), biogas plants compete with all other plant types on the market for electrical energy. However, exchange-based electricity products do not currently permit an economically viable operation of biogas plants owing to their cost situation.  相似文献   
12.
13.
14.
Do local partners' network attributes affect the survival of high-tech international joint ventures (IJV)? How does the effect of network attributes vary in different subnational institutional environments? While the classic economic explanation for IJV formation and subsequent performance draws from the resource-based view (RBV), we add the relational dimension to explain that IJV survival may be affected by local partners’ relation-specific assets within the local network. We test the effect of the local partners’ network attributes as calculated by UCINET (centrality, network status, and structural hole position) on IJV survival. We additionally assert that this relationship is moderated by subnational institutional heterogeneity. Using our sample of 125 IJV dyadic pairs of US multinational enterprises (MNEs) operating in high-tech industries and their local partners in China, we find partial support for our claims.  相似文献   
15.
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   
16.
We model how firms releasing information on different dates causes the CAPM to fail, requiring an additional factor based on the information structure to price assets. We exemplify this mechanism’s empirical relevance using quarterly earnings announcements, which cluster across months along size and book-to-market. Seventy percent of the alpha reduction from including SMB and HML occurs in the four main earnings announcement months. The information structure factor accounts for all of SMB and HML’s seasonal alpha reduction and one third of their overall alpha reduction. Controlling for size and book-to-market, exposures to SMB and HML vary with firms’ earnings announcement month.  相似文献   
17.
开展现场管理是提高企业管理水平、提高生产效率、提升产品质量、提升人员素质的有效途径.本文针对设计部门现场管理的建设思路与目标、实施过程进行了研究与实践,取得了良好的效果,为设计部门现场管理与建设提供了参考.  相似文献   
18.
Journal of Business Ethics - Airline pilots are attributed ultimate responsibility and final authority over their aircraft to ensure the safety and well-being of all its occupants. Yet, with the...  相似文献   
19.
20.
Kim  Hyeongwoo  Lin  Ying  Thompson  Henry 《Open Economies Review》2021,32(2):395-415
Open Economies Review - A number of researchers have found that the rate of exchange rate pass-through (ERPT) to domestic prices has declined substantially over the last few decades. We revisit...  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