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   21203篇
  免费   529篇
  国内免费   348篇
财政金融   1519篇
工业经济   1146篇
计划管理   5403篇
经济学   3532篇
综合类   2239篇
运输经济   351篇
旅游经济   714篇
贸易经济   2760篇
农业经济   1940篇
经济概况   2476篇
  2024年   94篇
  2023年   343篇
  2022年   370篇
  2021年   537篇
  2020年   742篇
  2019年   521篇
  2018年   505篇
  2017年   683篇
  2016年   625篇
  2015年   683篇
  2014年   1627篇
  2013年   2025篇
  2012年   1773篇
  2011年   2171篇
  2010年   1559篇
  2009年   1346篇
  2008年   1408篇
  2007年   1266篇
  2006年   1037篇
  2005年   805篇
  2004年   564篇
  2003年   330篇
  2002年   213篇
  2001年   200篇
  2000年   149篇
  1999年   88篇
  1998年   92篇
  1997年   56篇
  1996年   51篇
  1995年   45篇
  1994年   37篇
  1993年   20篇
  1992年   17篇
  1991年   18篇
  1990年   9篇
  1989年   8篇
  1988年   5篇
  1987年   4篇
  1986年   9篇
  1985年   11篇
  1984年   12篇
  1983年   10篇
  1982年   7篇
  1981年   1篇
  1980年   2篇
  1979年   2篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
891.
党政领导人才教育培训的投入是最具经济和社会效益的投入,也是收益最大的投入。党政领导人才教育培训是党政领导人才资源开发系统中的一个基础和重要环节。党政领导人才教育培训应遵循现代成人教育培训的基本规律。  相似文献   
892.
珠三角城市综合竞争力双层次因素分析与聚类评估   总被引:1,自引:0,他引:1  
采用最新权威统计数据,从人力资源、经济发展、社会发展、财政金融、知识经济、基础设施、生态环境、对外开放竞争力等八个子系统层构建全方位、多角度、动静结合的多指标评价体系,采用双层次因素分析法对珠三角城市群9个城市综合竞争力进行了分类测度和逐项竞争力排序;结合城市综合竞争力得分,对城市群进行了Q型系统聚类分析,将珠三角城市群按照综合竞争力强弱情况分为四类,在分析各城市优劣势的基础上提出珠三角城市群整体发展目标及政策建议。  相似文献   
893.
文章选取创业板市场上的有关样本,对高折价率的影响因素进行了多元回归实证分析,结果表明:发行规模、换手率、发行市盈率、中签率等变量可在一定程度上解释我国创业板新股上市折价的现象。  相似文献   
894.
首先对美国艾滋病医疗试验机构ACTG公布的两组数据进行统计分析,剔除异常点,筛选出有效数据,利用Matlab软件画出散点图,寻找CD4浓度、HIV浓度随时间变化的规律。其次,利用线性回归对几种不同疗法的优劣以及疗效进行了研究,给出二次回归模型,并对回归模型显著性进行检验,说明其是合理的。通过以上统计分析得到最佳治疗终止时间和最佳疗法。  相似文献   
895.
由于我国养老保险存在历史遗留问题和人口老龄化的双重压力,在建设新型养老保险体系时,需要充分借鉴外国经验。作为这方面最为成功的瑞士养老保险体系能够给我不少借鉴。本文从分析瑞士养老保险运行现状和面临问题出发,回归到我国养老保险现实中来,进而为建设新型养老保险体系提供具体建议。  相似文献   
896.
The present research proposes a new generalisation of the logistic model aiming at technology diffusion forecasting. Regarding criticisms and failures reported in the literature to apply logistic function for long-term forecasting, in our work we focused on short-term accuracy of forecast. To formulate the model, based on mathematical approximation, at first the differential equation governing the diffusion process is found and then by solving the derived differential equation, the forecast function is obtained. In all steps, mathematical tools from numerical analysis are used. We compared the New Generalized Logistic Model with eight of the most renowned models in the literature. The model led to more accurate fits and forecasts than those obtained from other models we applied for comparison.  相似文献   
897.
In this paper, I formulate a simple North–South R&D‐based growth model where final goods firms in the North endogenously determine the range of international outsourcing of intermediate goods to the South. I show that a fall in the trade cost (through trade liberalization) of intermediate goods in the North: (i) reduces the wage of the North relative to that of the South; (ii) increases the outsourced variety of intermediate goods in the North; and (iii) stimulates Northern R&D activity and economic growth in both countries. By conducting welfare analysis, I also show that a decline in the trade cost of intermediate goods in the North improves welfare in the South more than in the North.  相似文献   
898.
The procurement of infrastructure projects via public–private partnerships (PPPs) is rising globally. PPPs are, however, often characterized by lengthy tendering periods, defined as the difference between contract notice and financial close. Tendering periods are important because they account for a significant proportion of overall project delivery time. Slow tendering deters bidders and thus reduces competition for contracts. We source data on 670 PPP projects in the United Kingdom and use a duration analysis model to empirically examine factors that impact tendering period duration. Our results reveal significant sectoral variation with projects in the health and housing sectors taking significantly longer to reach financial close. We also show that, after controlling for other factors, projects with higher capital values and projects that overlap with the timing of general elections are associated with significantly longer tendering periods. We further examine the impact of the competitive dialogue procurement method and find evidence that tendering periods have increased since 2006; the year competitive dialogue was introduced. We do, however, observe a significant reduction in the time between appointment of preferred bidder and financial close post-2006. This suggests that competitive dialogue is effective in reducing the scope for negotiations by preferred bidders holding quasi-monopoly advantages.  相似文献   
899.
We examine the educational production function and efficiency of public school districts in Illinois. Using non-parametric kernel methods, we find that most traditional schooling inputs are irrelevant in determining test scores (even in a very general setting). Property tax caps are the only relevant factor that is related to districts’ financial constraints and have predominantly negative associations with test scores. Therefore, insufficient resources may be partially responsible for the lack of growth in test scores. For most other relevant inputs, we find substantial heterogeneity in the returns, which helps reconcile some of the puzzling results in the literature. We further find that there exist inefficiencies in school districts. Moreover, the level of test scores, commonly used as a measure of school effectiveness, (while related) differs substantially from our efficiency scores, and standard parametric approaches drastically underestimate school efficiency. We discuss the policy implications of our results.  相似文献   
900.
In this article, the authors discuss the use of Federal Reserve Economic Data (FRED) statistics to teach the concept of price elasticity of demand in an introduction to economics course. By using real data in its computation, they argue that instructors can create a value-adding context for illustrating and applying a foundational concept in economics. Additionally, this pedagogical strategy contributes to developing an expected proficiency for economics majors related to “interpreting and manipulating data” (Hansen 2009, 2012). The authors provide step-by-step instructions on how to use FRED to compute the price elasticity of demand for motor vehicle fuels and gasoline as well as examples of in-class discussion questions and take-home assignments related to this instructional technique.  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