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   5712篇
  免费   89篇
  国内免费   3篇
财政金融   718篇
工业经济   393篇
计划管理   1105篇
经济学   1072篇
综合类   478篇
运输经济   31篇
旅游经济   21篇
贸易经济   747篇
农业经济   370篇
经济概况   856篇
信息产业经济   2篇
邮电经济   11篇
  2024年   8篇
  2023年   48篇
  2022年   103篇
  2021年   147篇
  2020年   143篇
  2019年   89篇
  2018年   101篇
  2017年   148篇
  2016年   115篇
  2015年   127篇
  2014年   194篇
  2013年   285篇
  2012年   496篇
  2011年   672篇
  2010年   543篇
  2009年   386篇
  2008年   431篇
  2007年   405篇
  2006年   391篇
  2005年   344篇
  2004年   132篇
  2003年   122篇
  2002年   96篇
  2001年   94篇
  2000年   57篇
  1999年   43篇
  1998年   20篇
  1997年   18篇
  1996年   14篇
  1995年   5篇
  1994年   5篇
  1993年   6篇
  1992年   1篇
  1991年   3篇
  1990年   3篇
  1989年   2篇
  1988年   2篇
  1987年   1篇
  1984年   4篇
排序方式: 共有5804条查询结果,搜索用时 15 毫秒
991.
Jiang  Tianxu  Zhu  Min 《Quality and Quantity》2021,55(3):969-991
Quality & Quantity - This paper contributes to the literature on the effects of companies’ current innovation capability on cross-border M&A initiation decisions by providing...  相似文献   
992.
Abstract

Aims: To examine the impact of perioperative inhaled corticosteroids (ICS) on length-of-stay (LOS) and costs among patients receiving high-respiratory-risk surgeries.

Methods: Adult patients who underwent high-respiratory-risk surgeries in 2015 were identified in the Tianjin Urban Employee Basic Medical Insurance database. Patients were grouped into ICS or non-ICS cohorts according to whether they received ICS during the perioperative period of the index hospitalization. Propensity Score Matching was performed to create matched pairs between two cohorts. The impact of perioperative ICS on LOS and direct medical costs was estimated by negative binomial model and generalized liner model.

Results: Eight hundred and twenty-one hospital stays with high-respiratory-risk were selected in the ICS cohort and another 821 stays in the non-ICS cohort were matched. The mean LOS was 13.0 (±0.3) days in the ICS cohort, which was significantly lower than the matched non-ICS cohort. Patients with thorax and ear-nose-throat surgeries had a significant decrease in LOS in the ICS cohort compared to the non-ICS cohort, with a mean decrease of 5.5 and 1.1?days, respectively. In adjusted analyses, perioperative ICS treatment was associated with shorter LOS, lower total, and respiratory-related costs (reductions of 10.1%, 7%, and 5.3%, respectively) after controlling for demographic, clinical, and hospital characteristics.

Limitations: Some respiratory risk factors such as living behavior and environment were unable to be captured and respiratory-related costs might be underestimated, limited by claim data. Lastly, caution should be taken when generalizing the results to other populations, as only patients with moderate-to-severe surgeries on the thorax and above were selected in this study.

Conclusions: Perioperative ICS treatment was associated with decreased LOS and lower costs for patients undergoing high-respiratory-risk surgeries in China.  相似文献   
993.
朱欢 《时代经贸》2020,(8):72-73
全面预算管理是基于企业的内外环境的预算管理方式,企业通过高效的预算管理提升经营管理水平,优化企业的内部资源分配。全面预算管理在企业中的应用已经逐渐趋于成熟,也取得了较好的成绩。企业利用全面预算管理规范内部的经营管理,规划企业的未来发展趋势,预算管理是实现企业战略目标的重要手段,但是企业在落实全面预算管理过程中,仍然存在一定的问题,使全面预算管理的作用不能完全发挥。本文主要分析了企业全面预算管理存在的问题,并且提出了相应的解决措施。  相似文献   
994.
不同类型联盟网络涉及不同程度的知识共享和知识泄露风险,并有可能对突破式创新产生差异化影响。选取合肥、南京和苏州253个企业为样本,探究企业探索性联盟网络和开发性联盟网络分别对突破式创新的直接效应,以及技术能力和网络惯例等内外部情境变量对两种关系的调节效应。结果发现:探索性联盟网络对突破式创新具有倒U型效应;开发性联盟网络对突破式创新不具有曲线效应,仅是正向线性关系;内外部不同情境变量对探索性、开发性联盟网络具有不同调节效应。其中,技术能力仅对探索性联盟网络与突破式创新间关系具有显著正向调节作用;网络惯例对开发性联盟网络与突破式创新间关系具有显著正向调节作用。研究结论对组建企业联盟和推动企业技术创新发展具有一定指导意义。  相似文献   
995.
基于资源基础理论和持续创新内生机制,利用435家高技术企业2010—2018年面板数据,对多元化战略对高技术企业创新持续性的影响进行探究。结果表明,产品多元化与创新持续性呈正U型关系,技术多元化对创新持续性具有正向促进作用,产品多元化与技术多元化协同效应对创新持续性具有负向影响;动态能力强化了产品多元化与创新持续性之间的正U型关系,并正向调节技术多元化与创新持续性之间的关系。在动态能力调节作用下,高技术企业产品多元化与技术多元化协同效应对创新持续性具有正向影响。  相似文献   
996.
现代化后发赶超要求以城市群作为主体空间形态,实现效率增进、功能跃升、均衡发展和开放合作.城市群正日益成为托起中国现代化的巨擘,目前我国19个城市群之间规模结构差异较大,以东部城市群发展质量最高.城市群发展失衡的原因在于,城市群城镇体系不合理、公共服务一体化存在障碍、区域一体化发展体制机制有待健全、城际间综合交通网络体系亟待完善.适应现代化发展要求,我国需要在城市群加快推动形成快速便捷的综合交通体系与一体化发展体制机制,以都市圈为载体优化城市群空间格局与推动城市群协同发展,加快构建包容共享的公共服务体系,提升城市群的开放发展水平,引领中国现代化发展.  相似文献   
997.
Chen  Xingwen  Zhu  Zheng  Liu  Jun 《Journal of Business Ethics》2021,170(3):615-634
Journal of Business Ethics - The concept of feeling trusted, which has received far less attention from researchers than trusting, refers to the trustee’s awareness of trustor’s exposed...  相似文献   
998.
资源型产业集群转型过程中的风险研究   总被引:1,自引:0,他引:1  
文章在阐述资源型产业集群转型背景的基础上,结合文献资料对资源型产业 集群转型过程中面临的风险进行了分类,并详细分析了各种风险的影响因素。构 建了资源型产业集群转型过程中风险评价指标体系和评价模型,并选取陕西省榆 林市能源化工产业集群进行实证研究,对文章提出的风险评价指标体系和模型进 行了校验。最后,提出了防范资源型产业集群转型过程中风险的建议。  相似文献   
999.
Understanding the tradeoffs in improving the precision of agricultural measures through survey design is crucial. Yet, standard indicators used to determine program effectiveness may be flawed, and at a differential rate for men and women. We use a household survey from Mozambique to estimate the measurement error from male and female self‐reports of their adoption and knowledge of three practices: intercropping, mulching, and strip tillage. Despite clear differences in human and physical capital, there are no obvious differences in the knowledge, adoption, and error in self‐reporting between men and women. Having received training unanimously lowers knowledge misreports and increases adoption misreports. Other determinants of reporting error differ by gender. Misreporting is positively associated with a greater number of plots for men. Recall decay on measures of knowledge appears prominent among men but not women. Findings from regression and cost‐effectiveness analyses always favor the collection of objective measures of knowledge. Given the lowest rate of accuracy for adoption was around 80%, costlier objective adoption measures are recommended for a subsample in regions with heterogeneous farm sizes.  相似文献   
1000.
This paper analyzes competition between two spatially differentiated multi-product retailers who encounter entry from a low-cost discounter. We assess how entry affects the pricing of the incumbent stores and the role played by the location of the entrant. Our primary objective is to identify how traditional retailers respond to new forms of low-cost retailing. Results show that post entry, the prices for some products are higher than the pre entry. However, which product prices increase depends on the incumbent’s location. Contrary to conventional wisdom, we find that the store closer to the entrant is better off compared to the incumbent located further away. We empirically demonstrate the main workings of our theory using sales data from several grocery stores that saw entry by discount stores in their trading areas.  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