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   7103篇
  免费   87篇
  国内免费   28篇
财政金融   667篇
工业经济   425篇
计划管理   812篇
经济学   1760篇
综合类   1533篇
运输经济   48篇
旅游经济   37篇
贸易经济   1028篇
农业经济   246篇
经济概况   661篇
信息产业经济   1篇
  2023年   24篇
  2022年   29篇
  2021年   42篇
  2020年   70篇
  2019年   75篇
  2018年   87篇
  2017年   68篇
  2016年   50篇
  2015年   49篇
  2014年   358篇
  2013年   415篇
  2012年   277篇
  2011年   345篇
  2010年   213篇
  2009年   227篇
  2008年   328篇
  2007年   307篇
  2006年   640篇
  2005年   496篇
  2004年   363篇
  2003年   354篇
  2002年   360篇
  2001年   365篇
  2000年   245篇
  1999年   206篇
  1998年   113篇
  1997年   64篇
  1996年   58篇
  1995年   22篇
  1994年   55篇
  1993年   12篇
  1992年   9篇
  1991年   6篇
  1990年   4篇
  1989年   4篇
  1988年   2篇
  1986年   1篇
  1985年   183篇
  1984年   199篇
  1983年   148篇
  1982年   94篇
  1981年   53篇
  1980年   79篇
  1979年   52篇
  1978年   40篇
  1977年   21篇
  1976年   1篇
  1975年   2篇
  1974年   1篇
  1973年   1篇
排序方式: 共有7218条查询结果,搜索用时 15 毫秒
1.
Despite the extensive amount of data generated and stored during the maintenance capacity planning process, Maintenance, Repair, and Overhaul (MRO) organizations have yet to explore their full potential in forecasting the required capacity to face future and unprecedented maintenance interventions. This paper explores the integration of time series forecasting capabilities in a tool for maintenance capacity planning of complex product systems (CoPS), intended to value data that is routinely generated and stored, but often disregarded by MROs. State space formulations with multiplicative errors for the simple exponential smoothing (SES), Holt’s linear method (HLM), additive Holt-Winters (AHW), and multiplicative Holt-Winters (MHW) are assessed using real data, comprised of 171 maintenance projects collected from a major Portuguese aircraft MRO. A state space formulation of the MHW, selected using the bias-corrected Akaike information criterion (AICc), is integrated in a Decision Support System (DSS) for capacity planning with probabilistic inference capabilities and used to forecast the workload probability distribution of a future and unprecedent maintenance intervention. The developed tool is validated by comparing forecasted values with workloads of a particular maintenance intervention and with a model simulating current forecasting practices employed by MROs.  相似文献   
2.
新三板作为完善我国多层次资本市场的重要举措,在扩宽企业融资渠道、促进实体经济 发展等方面发挥着重要作用,然而信息披露质量不完善仍是制约新三板挂牌企业发展的重要因素。 基于企业会计信息质量视角,文章以 2006-2015 年新三板挂牌企业为研究样本,探讨主办券商声 誉机制是否能够发挥相应的治理作用。研究发现:高声誉主办券商促进了新三板挂牌企业信息披 露质量的提高,而且主要体现在市场化水平较高的省份;进一步研究表明主办券商声誉对信息质 量的治理作用在协议转让与创新层企业中更为明显。研究表明主办券商声誉能够对新三板挂牌企 业发挥相应的持续督导作用,对于如何提升新三板挂牌企业信息披露质量具有一定的借鉴意义。  相似文献   
3.
本文基于我国金融资本超额回报率的事实,在市场套利分析框架下实证检验了实 体企业金融化是抑制还是加剧了尾部金融风险溢出。数值模拟结果表明:从杠杆率来看,实体 企业金融化对杠杆率具有“双刃剑”效应,然而,实证结果发现,从长期经济后果来看,实体 企业金融化却显著提高了杠杆率,基于Altman-Z值的风险分析进一步发现企业破产风险显著 上升,从而加剧了尾部金融风险溢出。文章的研究结论有利于全面观察实体企业金融化带来的 的实际效果,也揭示了金融行业对实体行业的风险传导过程中的一个风险源,对于实体经济和 金融领域关于企业金融化效应的研究具有参考价值。  相似文献   
4.
This article uses a multi-country global general equilibrium (GE) model to numerically simulate the effects of possible China–US trade wars. We introduce an endogenous trade imbalance structure with trade cost into the model which helps to explore both tariff and non-tariff trade war effects. Our simulation results show that China will be significantly hurt by the China–US trade war, but negative impacts are affordable. The US can gain under unilateral sanction measures to China, but will lose if China takes retaliation measures. Comparing the effects under mutual trade war, China will lose more than the US. Introducing non-tariff barrier trade wars will intensify the negative effects, and comparatively negative effects to China are larger than to the US. Mexico’s involvement in trade war with the US will strengthen the negative effects and comparatively hurt the US more. Under non-cooperative and cooperative Nash bargaining equilibrium, the US can gain more than China in trade war negotiation, which means the US has stronger bargaining power than China. Additionally, trade wars between China and the US will hurt most countries and the world especially in GDP and manufacturing employment, but benefit their welfare and trade.  相似文献   
5.
This commentary explores the article by Fontes et al. published in this issue of Accounting Forum. They argue that the scope of IFRS continues to widen across the world, using a number of social science disciplines to discuss stakeholder perceptions of change. The commentary uses Hegel's Science of Logic to situate their arguments through four key theoretical approaches that are prominent in the accounting literature. Ultimately, this has the potential to position IASB frameworks in such a way as to challenge the economic and neoliberal logic on which modern accounting is based.  相似文献   
6.
ABSTRACT

In this study, we examine various aspects of China’s trade, the U.S.’ trade, and the bilateral trade between the two countries. The analysis of each aspect has direct and indirect implications on trade conflicts between the two countries. We focus on important factors, such as the growth of trade, import penetration, increased competitiveness of Chinese firms, comparative advantages of Chinese goods, China’s WTO entry and its compliance, and bilateral trade imbalance. While each of the factors can lead to trade frictions, individual factors will not have led to a large-scale trade war. These factors converge within a brief period and thus can be considered the China shock, thereby making other countries’ adjustments to their economic structures difficult. Therefore, trade frictions are inevitable.  相似文献   
7.
We investigate the role of contract volition and motives for accepting temporary employment in the relationship between precariousness of life and negative psychological symptoms in a sample of 275 Italian temps. Results suggest that the negative effect of contract volition on negative psychological symptoms is partially mediated by precariousness of life. A moderated mediation model shows that specific motives moderate the negative effects of contract volition on precariousness of life, so that when contract volition is higher, workers with weaker motives feel less precarious. This study broadens our understanding of temporary employment outcomes by showing that the negative consequences of precariousness of life seem to be less troublesome among temporary workers with higher contract volition and lower motivation. © 2018 ASAC. Published by John Wiley & Sons, Ltd.  相似文献   
8.
Product, information, and finance flows are all interrelated within the modern supply chain; thus, it is now more than ever of paramount importance for practitioners to integrate procurement and financial decisions. This challenge is exemplified in many agricultural supply chains, where operational risks are significant and access to capital differs sharply across firms. We study three management tactics that some large food/beverage manufacturers – situated downstream in these chains – have used to meet the challenge: ordinary fixed price contracts (or soft tolling) with direct suppliers, hard tolling and contract farming where the manufacturer intervenes upstream, providing capital, and coordinating procurement decisions. We place these upstream intervention schemes in the theoretical context of supply chain finance (SCF) and model their application to a three-echelon agricultural supply chain. We perform a numerical study in order to understand how the structure of capital constraints in the chain may influence the manufacturer's choice of SCF scheme. The numerical study is based on a business case that reflects the barley–malt supply chain of Heineken N.V. Despite greater coordination opportunities, we show that upstream intervention is not necessarily preferable for the manufacturer. Nevertheless, the preferred SCF scheme can be inferred on the basis of relatively simple characterization of the capital constraints in the supply chain.  相似文献   
9.
Booking.com provides a massive database compiling millions of reviews about thousands of accommodations worldwide that hotel managers and academics have extensively consulted during the past decade. In 2019–2020, however, the famous website changed several aspects of its methods of calculating hotel scores, the most important one being a change from its peculiar 2.5–10 scale to a more conventional 1–10 scale. Such novelties may cause changes in hotel scores that do not reflect changes, if any, in customer satisfaction. This article offers an initial investigation into the nature and consequences of those changes that professionals and academics should consider to avoid errors in future studies that involve using Booking. com's database.  相似文献   
10.
The historic precedents in telecommunications antitrust findings have tended towards finding harm to competition when network operators integrate downstream and bundle the provision of applications and services. The reason for this is that market power in network provision is thought to be extended into the applications market(s). More recently however, proposed mergers have been between telecommunications and media distribution firms, both of whom have some degree of market power, already sell their own services in bundles, and who may or may not have been offering combined bundles already via contractual agreements. Examples include Sky/Vodafone in New Zealand, and Time Warner/AT&T in the United States as well as Vodafone/Unitymedia in Germany and Media Capital/Altice in Portugal. These complex proposed arrangements pose challenges to competition authorities, whose legal and procedural rules and precedents, especially those defining the relevant markets affected by the merger or vertical integration activity, have been developed from the analysis of simpler cases. These precedents may not be sufficient to analyse current cases, characterized by multiple products catering to heterogeneous consumer preferences, and consumers are not constrained to buying only one variant of the products in each of the upstream and downstream markets.We illustrate the challenges by way of a case study of the proposed merger between Sky and Vodafone, declined by the New Zealand Commerce Commission in February 2017. Limitations in existing market definition processes and the evaluation of market power where bundling already occurs risk overlooking complex demand-side interactions that influence the profitability and efficiency of various structural and contractual strategic choices. We propose that classic merger and antitrust analysis based on econometric cost-benefit analysis can be augmented by using simulation and numerical analysis of a range of bundle offers expected to be relevant in decision-making. We develop a simple model and use it to illustrate how it may be used to inform broadband and content mergers, and other complex antitrust cases, such the assessment of the effects of two-sided markets and firm pricing decisions.  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