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   5496篇
  免费   286篇
  国内免费   92篇
财政金融   1147篇
工业经济   304篇
计划管理   914篇
经济学   1095篇
综合类   607篇
运输经济   70篇
旅游经济   157篇
贸易经济   877篇
农业经济   198篇
经济概况   505篇
  2024年   25篇
  2023年   117篇
  2022年   73篇
  2021年   133篇
  2020年   213篇
  2019年   189篇
  2018年   183篇
  2017年   191篇
  2016年   194篇
  2015年   176篇
  2014年   322篇
  2013年   674篇
  2012年   304篇
  2011年   401篇
  2010年   306篇
  2009年   305篇
  2008年   383篇
  2007年   342篇
  2006年   313篇
  2005年   227篇
  2004年   156篇
  2003年   146篇
  2002年   95篇
  2001年   93篇
  2000年   77篇
  1999年   45篇
  1998年   43篇
  1997年   32篇
  1996年   27篇
  1995年   27篇
  1994年   14篇
  1993年   13篇
  1992年   9篇
  1991年   4篇
  1990年   3篇
  1989年   2篇
  1988年   2篇
  1986年   2篇
  1984年   2篇
  1983年   6篇
  1982年   3篇
  1981年   1篇
  1979年   1篇
排序方式: 共有5874条查询结果,搜索用时 31 毫秒
101.
刘军  黄承智 《价值工程》2005,24(11):98-100
本文简要论述了我国会计师事务所在考虑产品策略、价格策略、分销策略、促销策略时用4C理论观念来思考,从顾客、成本、便利和沟通四个方面说明了我国会计师事务所在执行营销方案时应该考虑的一些策略和自身实际情况。  相似文献   
102.
Although burning fossil fuels has environmental consequences, many countries have switched away from nuclear power in favor of fossil-fuel fired electricity production after incidents at Three Mile Island, Chernobyl, and Fukushima. This study estimates the substitution between nuclear and fossil-fuel fired electricity generation in the United States. Using an event-study framework, we leverage nuclear plant openings from 1970 to 1995 and forced nuclear plant outages from 1999 to 2014. Plant openings (nuclear outages) reduce (increase) monthly net coal-fired generation by approximately 200 GWh, implying a considerable reduction (increase) in emissions. We find that the substitution between nuclear and coal is not one-to-one, as has been assumed in prior literature. After establishing these stylized facts, we explore the potential underlying forces driving the observed substitution between coal and nuclear.  相似文献   
103.
李玲  陶厚永 《技术经济》2012,31(7):20-27,54
在对制度环境、股权制衡与企业创新之间的相关性进行理论分析的基础上,利用359家深市上市企业在2008—2010年的数据,实证检验了制度环境、股权制衡对企业创新绩效的影响机理。实证结果表明:制度环境对企业创新绩效具有显著的正向影响,内部驱动力在该影响过程中发挥中介作用;股权制衡正向调节内部驱动力与企业创新绩效之间的关系;高股权制衡度能促进企业增加R&D投入,从而提高企业的创新绩效;低股权制衡度对企业R&D投入增加、创新绩效提升的影响不明显。最后针对营造良好的制度环境、建立有效的股权制衡结构等给出对策建议。  相似文献   
104.
Aim: To describe treatment pattern, complications, and direct medical costs associated with ankylosing spondylitis (AS) in Chinese urban patients.

Methods: The 2013 China Health Insurance Research Association (CHIRA) urban insurance claims database was used to identify patients with AS. The identified patients were stratified by AS treatments for the comparisons of well established AS-related complications and direct medical costs. Conventional regression analyses adjusted the collected patient baseline characteristics to confirm the impact of treatments on complications and direct medical costs.

Results: Of the identified 1299 patients with AS, 18.0% received non-steroidal anti-inflammatory drugs (NSAID), 11.2% received immunosuppressant, 48.2% received NSAID plus immunosuppressant, 4.6% received biologic agents, and 17.9% received medications without indication for AS. Biologic group was associated with the lowest proportion of AS-related complications (8.3%) that was confirmed by multiple logistic regression analysis (odds ratio = 0.200, p?=?.017). The biologic group was also associated with highest direct medical costs (median: RMB?=?14,539) that were confirmed by the multiple generalized linear model (coefficient = 1.644, p?Conclusions: Biologics were not commonly used for AS in Chinese patients likely due to their high cost. Future studies are needed to confirm the potential long-term clinical benefits associated biologic treatment for AS.  相似文献   
105.
Aims: This study compared the risk for major bleeding (MB) and healthcare economic outcomes of patients with non-valvular atrial fibrillation (NVAF) after initiating treatment with apixaban vs rivaroxaban, dabigatran, or warfarin.

Methods: NVAF patients who initiated apixaban, rivaroxaban, dabigatran, or warfarin were identified from the IMS Pharmetrics Plus database (January 1, 2013–September 30, 2015). Propensity score matching (PSM) was used to balance differences in patient characteristics between study cohorts: patients treated with apixaban vs rivaroxaban, apixaban vs dabigatran, and apixaban vs warfarin. Risk of hospitalization and healthcare costs (all-cause and MB-related) were compared between matched cohorts during the follow-up.

Results: During the follow-up, risks for all-cause (hazard ratio [HR]?=?1.44, 95% confidence interval [CI]?=?1.2–1.7) and MB-related (HR?=?1.57, 95% CI?=?1.0–2.4) hospitalizations were significantly greater for patients treated with rivaroxaban vs apixaban. Adjusted total all-cause healthcare costs were significantly lower for patients treated with apixaban vs rivaroxaban ($3,950 vs $4,333 per patient per month [PPPM], p?=?.002) and MB-related medical costs were not statistically significantly different ($100 vs $233 PPPM, p?=?.096). Risk for all-cause hospitalization (HR?=?1.98, 95% CI?=?1.6–2.4) was significantly greater for patients treated with dabigatran vs apixaban, although total all-cause healthcare costs were not statistically different. Risks for all-cause (HR?=?2.22, 95% CI?=?1.9–2.5) and MB-related (HR?=?2.05, 95% CI?=?1.4–3.0) hospitalizations were significantly greater for patients treated with warfarin vs apixaban. Total all-cause healthcare costs ($3,919 vs $4,177 PPPM, p?=?.025) and MB-related medical costs ($96 vs $212 PPPM, p?=?.026) were significantly lower for patients treated with apixaban vs warfarin.

Limitations: This retrospective database analysis does not establish causation.

Conclusions: In the real-world setting, compared with rivaroxaban and warfarin, apixaban is associated with reduced risk of hospitalization and lower healthcare costs. Compared with dabigatran, apixaban is associated with lower risk of hospitalizations.  相似文献   
106.
107.
Threshold cointegration between market pairs before and after the potential structural break associated with the shale gas revolution is examined. Pairwise transaction costs differ between the pre- and post-break periods. During the post-break period, five of seven pairwise transaction costs decrease, while the remaining two pair-wise transaction costs increase relative to the pre-break period. Alterations in natural gas flows as the result of the shale gas revolution partially explain the changes in transaction costs.  相似文献   
108.
Burcak Polat 《Applied economics》2017,49(19):1901-1912
Even though the choice of capital structure depends on the three different financial components of foreign direct investment (FDI), previous research has regarded FDI as unidimensional rather than multidimensional. This study addresses new findings in the FDI area and investigates the relevant determinants of capital structure in 30 OECD countries from 2006 to 2014 within the framework of a simultaneous equation model. Our primary findings reveal that each component has its own deterministic features driven by relevant policy variables and risks in the market. While an increase or decrease in equity capital shows the ability of the host country to attract new investments, the subsequent components are mostly used to adjust the equity capital investment exposure.  相似文献   
109.
Transaction costs are barriers for internationalisation processes. This paper investigates the practical relevance of transaction costs economics (TCE) for international supply chain management (SCM) in this era of globalisation, which is characterised by splitting up the supply chain in more and more parts. The analysis is based on data from in-depth interviews with seven manufacturing companies in the Netherlands which are actually engaged in this modern way of organising production. It is shown that the balance between transaction costs and sheer production costs (transformation costs) plays a prominent role in the strategic decisions on how and where to organise production. Especially intangible (or ‘soft’) transaction costs are important in this respect. The analysis provides insight in practical experience in the manufacturing industry in the Netherlands with transaction costs and shows how transaction costs affect decisions on transaction management, personnel policy and internationalisation of R&D. This study is to our knowledge the first to confront the theory of TCE with practice of manufacturing firms in their internationalisation decisions using in-depth interviews instead of survey data.  相似文献   
110.
Many countries have large or increasing migrant populations. We estimate the elasticity of private-sector employment to nonoil GDP for nationals and migrants using a Seemingly Unrelated Error Correction (SUREC) model. We use data from the Gulf Cooperation Council (GCC) countries, which have a particularly large share of foreign workers. Our results indicate that the employment response is statistically significantly lower for nationals, who have an estimated short-run elasticity of only 0.15 and a long-run response of 0.7, than for migrants, where the short- and long-run elasticities are 0.35 and almost unity. Lower elasticities could signal higher labour market adjustment costs. In the context of low oil prices, forecasts imply a significant jobs shortfall for nationals in the coming years.  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