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   746篇
  免费   46篇
财政金融   128篇
工业经济   35篇
计划管理   133篇
经济学   200篇
综合类   4篇
运输经济   10篇
旅游经济   25篇
贸易经济   176篇
农业经济   35篇
经济概况   44篇
邮电经济   2篇
  2024年   3篇
  2023年   15篇
  2022年   7篇
  2021年   16篇
  2020年   27篇
  2019年   43篇
  2018年   42篇
  2017年   58篇
  2016年   43篇
  2015年   29篇
  2014年   35篇
  2013年   106篇
  2012年   28篇
  2011年   35篇
  2010年   34篇
  2009年   41篇
  2008年   25篇
  2007年   30篇
  2006年   19篇
  2005年   18篇
  2004年   18篇
  2003年   18篇
  2002年   16篇
  2001年   11篇
  2000年   15篇
  1999年   6篇
  1998年   8篇
  1997年   7篇
  1996年   5篇
  1995年   4篇
  1994年   3篇
  1993年   2篇
  1992年   1篇
  1991年   3篇
  1990年   2篇
  1989年   2篇
  1988年   1篇
  1987年   1篇
  1986年   1篇
  1985年   5篇
  1983年   3篇
  1981年   1篇
  1979年   4篇
  1977年   1篇
排序方式: 共有792条查询结果,搜索用时 15 毫秒
41.
An effective emergency medical service (EMS) response to emergency medical calls during extreme weather events is a critical public service. Nearly all models for allocating EMS resources focus on normal operating conditions. However, public health risks become even more critical during extreme weather events, and hence, EMS systems must consider additional needs that arise during weather events to effectively respond to and treat patients. This paper seeks to characterize how the volume and nature of EMS calls are affected during extreme weather events with a particular focus on emergency preparedness. In contrast to other studies on disaster relief, where the focus is on delivery of temporary commodities, we focus on the delivery of routine emergency services during blizzards and hurricane evacuations. The dependence of emergency service quality on weather conditions is explored through a case study using real-world data from Hanover County, Virginia. The results suggest that whether it is snowing is significant in nearly all of the regression models. Variables associated with increased highway congestion, which become important during hurricane evacuations, are positively correlated with an increased call volume and the likelihood of high-risk calls. The analysis can aid public safety leaders in preparing for extreme weather events.  相似文献   
42.
Enterprises in post-socialist and transition economies often participate in providing infrastructure and social services to the surrounding community which in the Russian legal setting should be local authorities’ responsibility. We propose that this bundling of social and infrastructure goods provision with firm's core operations is a fully rational choice in an uncertain institutional environment. A unique survey data suggest that this manifests itself through more reliable infrastructure, stronger employee attachment to the firm and, most interestingly, through better relations with the authorities. Relationship with authorities is a two-way game where the firm gains from the arrangement but on the other faces sanctions if it decided to depart from it. Firm's participation in the arrangement is clearly enhanced by inherited fixed capital assets from the Soviet era.  相似文献   
43.
Abstract

Public sector organizations are simultaneously subject to three types of environmental pressure: institutional, economic and political. How do these pressures influence the strategic behaviour of public organizations when confronted with efficiency-oriented reforms? We focus on the strategic behaviour of Swiss municipalities facing the amalgamation wave: a reform characterized by a strong economic rationale. Results confirm that the success of reforms depends not only on its matching with economic underpinnings. It is also necessary to take the political leadership and the responsibility of reform implementation.  相似文献   
44.
The emergence of Brazil, Russia, India and China (BRIC) as international locations for foreign direct investment in R&D is a sign that multinationals are relocating their technological activities to new territories. This trend may weaken the supremacy of the developed countries until now considered leaders in innovation, and may mean the loss of the competitive advantages enjoyed by the countries considered intermediate innovators. This paper examines the situation of Spain as a typical intermediate economy and compares it to its main competitors among the BRICs. Based on eight case studies of subsidiaries with R&D centres in Spain, we conclude that the policies adopted by certain emerging economies to develop their national innovation systems are proving effective and that these countries now pose a threat to intermediate economies. However, the BRICs still lag behind in terms of the security of their institutional framework; this situation leaves intermediate countries in an advantageous position.  相似文献   
45.
This paper shows how to carry out quantitative narrative analysis (QNA) with different text analysis software (PC-ACE, Program for Computer-Assisted Coding of Events, and various CAQDAS programs, Computer-Assisted Qualitative Data Analysis Software: ATLAS.ti, MAXQDA, and NVivo). QNA is a methodological approach to narrative texts that exploits invariant properties of narrative (namely, a “story grammar”, based on actors, actions, and their attributes) to make a statistical analysis of words possible. In comparing PC-ACE and CAQDAS, the paper leads the reader through the steps involved in setting up a grammar, in data entry, and in data query. A careful comparison of limits and possibilities of the two types of software will allow the reader interested in QNA to make an informed choice between a full implementation of QNA in a specialized but unknown software (PC-ACE) and a limited implementation in any of the widely used and popular CAQDAS programs.  相似文献   
46.
This paper studies externalities of nationally determined cost‐sharing systems, in particular coinsurance rates, under pharmaceutical parallel trade in a two‐country model with a vertical distributor relationship. Parallel trade generates a price‐decreasing competition effect in the destination country of the parallel import and a price‐increasing double marginalization effect in the source country. An increase of the coinsurance rate in the destination country mitigates the double marginalization effect in the source country. An increase of the coinsurance rate in the source country reinforces the competition effect in the destination country. This may be a case for policy coordination in the European Union.  相似文献   
47.
48.
49.
I use a laboratory experiment to examine the productive and counterproductive effects of providing employees nonpecuniary recognition based on measures of relative performance. I find that, on average, recognition programs increase both productive efforts (those intended to increase one's own performance) and counterproductive efforts (those intended to decrease peer performance) in a setting where it is salient to employees that they can exert both productive and counterproductive efforts. Interestingly, I also find that these effects are moderated by the Dark Triad of personalities, a group of three personality traits. My study reveals that recognition programs mainly lead individuals who score lower on the Dark Triad to increase counterproductive efforts and those who score higher on the Dark Triad to increase productive efforts. These results contribute to the literature on relative performance information by demonstrating that recognition programs can have both productive and counterproductive effects. However, whether these programs produce mainly a productive or counterproductive effect depends on important personality characteristics of the employees.  相似文献   
50.
We conduct the first study to examine the fetal health impact of light pollution based on a direct measure of skyglow, an important aspect of light pollution. Using an empirical regularity discovered in physics (called Walker's law) as an instrumental variable, we address the potential endogeneity problem associated with the skyglow variable. We find evidence of reduced birth weight, shortened gestational length, and increases in preterm births. Specifically, increased nighttime brightness, characterized by being able to see only one‐fourth to one‐third of the stars that are visible in the natural unpolluted night sky, is associated with an increase of 1.48 percentage points in the likelihood of a preterm birth. Our study adds to the literature on the impact of early‐life exposure to pollution, which so far has focused primarily on air pollution. Our study has important policy implications regarding the necessity of minimizing skyglow that is, for example, contributed by streetlights.  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