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   1237篇
  免费   60篇
财政金融   254篇
工业经济   113篇
计划管理   244篇
经济学   291篇
综合类   3篇
运输经济   11篇
旅游经济   11篇
贸易经济   215篇
农业经济   44篇
经济概况   110篇
信息产业经济   1篇
  2024年   4篇
  2023年   15篇
  2022年   10篇
  2021年   14篇
  2020年   25篇
  2019年   52篇
  2018年   53篇
  2017年   40篇
  2016年   37篇
  2015年   28篇
  2014年   49篇
  2013年   147篇
  2012年   43篇
  2011年   55篇
  2010年   66篇
  2009年   43篇
  2008年   39篇
  2007年   51篇
  2006年   40篇
  2005年   49篇
  2004年   47篇
  2003年   30篇
  2002年   40篇
  2001年   25篇
  2000年   18篇
  1999年   34篇
  1998年   33篇
  1997年   22篇
  1996年   20篇
  1995年   23篇
  1994年   11篇
  1993年   19篇
  1992年   11篇
  1991年   8篇
  1990年   4篇
  1989年   7篇
  1988年   8篇
  1987年   4篇
  1986年   3篇
  1985年   9篇
  1984年   13篇
  1983年   11篇
  1982年   3篇
  1981年   8篇
  1980年   5篇
  1979年   6篇
  1978年   4篇
  1977年   4篇
  1975年   2篇
  1973年   2篇
排序方式: 共有1297条查询结果,搜索用时 687 毫秒
111.
This paper develops an econometric model that can provide predictions of fire suppression costs (per acre and in total) for a given large fire before final fire acreage is known. The model jointly estimates cost per acre and acreage equations via Maximum Likelihood, accounting for sample truncation based on final fire size. Formulas and results are shown for predictions of costs and fire size for wildfires in general, and for large fires in particular. Marginal effects of explanatory variables on cost and acreage are discussed. The distribution of these model predictions illustrates the importance of accounting for sample truncation when generating predicted outcomes based on ex ante information.  相似文献   
112.
113.
This paper examines the supposed shift from government to governance in the context of land-use planning in England and indicates some of the problems which surround increased regional autonomy in governmental systems. It is argued that decision-making processes around land use, especially when they concern conflicts between development and environmental protection, are not easily rendered into the flexible arrangements deemed characteristic of governance. Two case studies in the housing and minerals sectors – presented to illustrate this general argument – show the existence of strong ‘strategic lines’ which tend to subsume local representations and limit the formation of partnerships. In both cases, the strategic line comes dressed in the language of technical (numerical) forecasts and projections which raises problems for any local opposition to the thrust of the strategy. In conclusion it is argued that although some recasting of the planning regime in each sector is underway this has only served to highlight continuing problems in linking strategy and locality, especially in cases of conflict around land use, which regional governance may not easily alleviate. Cet article examine le prétendu changement du gouvernementà la gouvernance dans le contexte de la planification de l’utilisation du sol en Angleterre et montre certains des problèmes liés à la croissance de l’autonomie régionale dans les systèmes gouvernementaux. Les processus de décision concernant l’utilisation du sol, particulièrement quand ils concernent des conflits entre le développement et la protection de l’environnement, ne sont pas aisément résolus par les arrangements flexibles qui sont dits caractéristiques de la gouvernance. Deux cas d’étude dans les secteurs du logement et des mineraux – présentés afin d’illustrer l’argument général – montrent l’existence de fortes ‘strategic lines’ qui ont tendance à inclure les représentations locales et qui limitent la formation d’associations. Dans les deux cas, ‘the strategic line’ prend la forme des prévisions techniques (quantitative) et des projections, ce qui pose des problèmes pour toute opposition locale à la dynamique de la stratégie. En conclusion, bien que certains remaniements soient en cours dans le régime de planification de chaque secteur, ceci n’a servi qu’à souligner les problèmes continus des liens entre la stratégie et la localité, particulièrement en cas de conflit quant à l’utilisation du sol, que la gouvernance régionale risque de ne pas pouvoir résoudre facilement.  相似文献   
114.
There are fundamental differences between seeking-to-solve and seeking-to-understand. We are strongly biased toward seeking-to-solve on a number of dimensions. As a result, we are increasingly at risk in a world that is becoming increasingly complex and fast paced. We therefore need to understand these biases so that we can defend ourselves -- we need to develop (moral) concepts and methods of inquiry that transcend our dominant and pervasive analytical presuppositions.  相似文献   
115.
116.
A natural monopolist whose cost is private information produces a good which is combined with another good that can be produced by the monopolist or by other firms. The agency that regulates the monopolist can impose any of several different market structures in the industry: integrated monopoly, vertical separation with free entry downstream, or liberalization downstream (both integrated and independent production). When several firms produce downstream, a Cournot quantity-setting game with free entry determines the market price. We derive the optimal contracts to offer the monopolist under all three market structures and examine the influence of downstream cost differences on access prices.We then study the optimal regulatory policy where the regulator can condition the downstream market structure on the monopolist's cost report to the regulator. The optimal regulatory policy awards a monopoly to a low-cost upstream firm, but requires free entry downstream if the monopolist reports high upstream costs. Thus, the choice of market structure is an additional tool to limit rent extraction by the monopolist. Simulation analysis reveals the possibility of significant welfare gains from this additional regulatory tool.  相似文献   
117.
118.
Strategic Goals and Practices of Innovative Family Businesses   总被引:1,自引:0,他引:1  
A profile of 231 Washington state family businesses is presented. This article focuses on the business strategies of these firms, analyzing the relationship between strategy, performance, and business practices. Firms categorized as Prospector firms reported more gains in their current market position than all other strategic types. These firms were more likely to value an effective management and employee team and to develop new quality products and services and career development plans for non-family employees. Implications for family businesses are discussed.  相似文献   
119.
This paper examines the structural determinants of output volatility in developing countries, and especially the roles of geography and institutions. We investigate the volatility effects of market access, climate variability, the geographic predisposition to trade, and various measures of institutional quality. We find an especially important role for market access: remote countries are more likely to have undiversified exports and to experience greater volatility in output growth. Our results are based on Bayesian methods that allow us to address formally the problem of model uncertainty and to examine robustness across a wide range of specifications.  相似文献   
120.
Innovations usually have an initial impact on very few people. The period of learning or early evaluation precedes the diffusion of the technology into the wider addressed population. More than a transfer, this is best characterized as communication of benefits, costs, and compatibility with earlier technologies and a relative assessment of the new state of the art. Innovation development by an organization or individual creates not just a device (i.e., process or tacit knowledge) but concomitantly a capacity on the part of other organizations or persons to use, adopt, replicate, enhance, or modify the technology, skills, or knowledge for their own purposes. How innovations actually diffuse is to understand the communication of progress, and this framing helps one to design innovations and also design the marketing and testing programs to ready innovations for market and launch them efficiently. Diffusion theory's main focus is on the flow of information within a social system, such as via mass media and word‐of‐mouth communications. This theory presents often in the form of mathematical models of innovation and imitation. Distinct from classical diffusion models, however, consumers are not all identical in how they connect to others within a market or how they respond to information. We examine the effects of various network structures and relational heterogeneity on innovation diffusion within market networks. Specifically, network topology (the structure of how individuals in the market are connected) and the strength of communication links between innovator and follower market segments (a form of relational heterogeneity) are studied. Several research questions concerning network heterogeneity are addressed with an agent‐based modeling approach. The present study's findings are based on simulation results that show important effects of network structure on the diffusion process. The ability to speed diffusion varies significantly according to within‐ and cross‐segment communications within a heterogeneous network structure. The implications of the present approach for new product diffusion are discussed, and future research directions are suggested that may add useful insights into the complex social networks inherent to diffusion. A simple summary is that discovery of significant prime communicator nodes in a network allows innovation development practices to be better calibrated to realistically multiple market segments.  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