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   7109篇
  免费   436篇
  国内免费   23篇
财政金融   974篇
工业经济   275篇
计划管理   1390篇
经济学   2162篇
综合类   52篇
运输经济   156篇
旅游经济   140篇
贸易经济   1672篇
农业经济   221篇
经济概况   516篇
邮电经济   10篇
  2024年   6篇
  2023年   138篇
  2022年   93篇
  2021年   140篇
  2020年   252篇
  2019年   286篇
  2018年   468篇
  2017年   564篇
  2016年   456篇
  2015年   257篇
  2014年   335篇
  2013年   1291篇
  2012年   410篇
  2011年   383篇
  2010年   373篇
  2009年   305篇
  2008年   253篇
  2007年   187篇
  2006年   178篇
  2005年   174篇
  2004年   121篇
  2003年   118篇
  2002年   108篇
  2001年   80篇
  2000年   61篇
  1999年   52篇
  1998年   49篇
  1997年   37篇
  1996年   31篇
  1995年   20篇
  1994年   26篇
  1993年   21篇
  1992年   20篇
  1991年   20篇
  1990年   12篇
  1989年   15篇
  1988年   7篇
  1987年   7篇
  1986年   7篇
  1985年   22篇
  1984年   21篇
  1983年   14篇
  1982年   16篇
  1981年   10篇
  1980年   8篇
  1979年   5篇
  1978年   6篇
  1976年   8篇
  1974年   11篇
  1969年   5篇
排序方式: 共有7568条查询结果,搜索用时 15 毫秒
101.
ABSTRACT

The aim of this paper is to examine the relationship between external cooperation and entrepreneurial orientation (EO). This relationship is explored in cluster environment, wherein entrepreneurial organizations compete and cooperate simultaneously to pursue opportunities. The following hypothesis is tested: External cooperation is positively correlated with entrepreneurial orientation. The hypothesis is tested with a correlation analysis on a sample of 77 small-sized enterprises operating in the Malopolska region in Poland, wherein several clusters are active. Additionally, the regression analysis is conducted to examine the associations between inter-organizational cooperation and EO dimensions. The findings confirm that external cooperation is positively correlated with EO. This observation is confronted with a pro-competitive approach that is a constitutional element of the entrepreneurship concept. Moreover, the findings show that the correlation between external cooperation and a firm’s performance is stronger than between some other EO dimensions and performance. Additionally, the findings show the important role of relationships between organizations and their clients. In the paper, several remarks for development of the theory are discussed, including the need for incorporating inter-organizational cooperation into a set of entrepreneurial traits and reflecting it in entrepreneurial orientation scales. The findings confirm the importance of that direction of theory development that focuses on inter-organizational collaboration in the context of entrepreneurship.  相似文献   
102.
Regulators often do not regulate all firms competing in a given sector. Due to product substitutability, unregulated competitors have incentives to bribe regulated firms to have them overstate their costs and produce less, thereby softening competition. The best collusion-proof contract entails distortions both for inefficient and efficient regulated firms (distortion ‘at the top’). But a contract inducing active collusion may do better by allowing the regulator to ‘team up’ with the regulated firm to indirectly tax its competitor. The best such contract is characterized. It is such that the unregulated firm pays the regulated one to have it truthfully reveals its inefficiency. We finally compare those contracts.  相似文献   
103.
The present paper considers some new models for the analysis of multidimensional contigency tables. Although the theoretical background used here appeared already in Haberman (1974), prescribed conditional interaction (PCIN) models were introduced by Rudas (1987) and their mathematical properties were worked out by Leimer and Rudas (1988). These models are defined by prescribing the values of certain conditional interactions in the contingency table. Conditional interaction is defined here as the logarithm of an appropriately defined conditional odds ratio. This conditional odds ratio is a conditional version of a generalization of the well known odds ratio of a 2×2 table and that of the three factor interaction term of a 2×2×2 table and applies to any number of dimensions and any number of categories of the variables. The well known log-linear (LL) models are special PCIN models. Estimated frequencies under PCIN models and tests of fit can be computed using existing statistical software (e.g. BMDP). The paper describes the class of PCIN models and compares it to the class of association models of Goodman (1981). As LL models are widely used in the analysis of social mobility tables, application of more general PCIN models is illustrated.  相似文献   
104.
105.
We consider a standard probabilistic model of random monitoring to analyze the interactions between a firm and a monitoring agency in the presence of “green” consumers when compliance payoffs are contingent on monitoring and monitoring costs are shared by the monitoring agency and the firm. When the amount paid by the firms if monitored is exogenously fixed, we find that full compliance is implemented with a finite fine. If there is an upper bound for the fine and the regulator determines endogenously the fine and the amount paid by the firms if monitored, we find that full compliance is also achieved, although the optimal fine is now set at its maximum level. The optimal amount paid by the firms if monitored is lower than the environmental premium the compliant firm gets.The author thanks two anonymous referees for their useful comments and suggestions  相似文献   
106.
ABSTRACT

The conservation enterprise is embedded in ideas of the environment through which it promotes a vision of the world and the relations between the non-human and human. The papers in this forum analyse conservation from various vantage points to draw the links between geopolitics and conservation. The authors use three themes to demonstrate these links. The first theme draws on the concept of environmentality to show the mobilization of ecological rationalities and power towards the creation of protected areas. The second pays attention to networks formed across the distance, and how they influence the location and governance of protected areas. The third focuses on the strategies the conservation lobby uses to align local identities with global conservation ideals and goals. Collectively, these themes highlight features of conservation geopolitics.  相似文献   
107.
108.
Rosel  Jesús  Jara  Pilar  Arnau  Jaime 《Quality and Quantity》2002,36(4):411-425
Certain manuals and computer programs mistakenly identify the mean with the constant in Box-Jenkins time series models. In this paper, it will be shown that (a) the mean and the constant have different values in autoregressive models, and (b) they have an algebraic and graphical relationship.  相似文献   
109.
Aggregation of Directional Distance Functions and Industrial Efficiency   总被引:1,自引:0,他引:1  
Three main objectives are pursued in this paper. First, we intend to analyze the aggregation problem of directional distance functions from a constructive viewpoint. We provide necessary and sufficient conditions concerning the structural properties of the production technology and of the nature of groups of firms. Indeed, exact additive aggregation holds for a linear technology and for a direction solely defined in the output space. Second, since these conditions are somewhat restrictive, we are interested in providing a measure for the aggregation bias through the relationship between industrial and structural technical efficiency. Finally, we show that this aggregation bias is a lower bound for industrial allocative efficiency.  相似文献   
110.
We examine the incentives for upstream firms to consolidate horizontally and the impact of this process on industry performance, when there are downstream entry barriers and firms negotiate bilaterally. In the short run, consumers are not worse off with upstream mergers, since consolidation only results in a redistribution of industry rents. In the long run, consumers are better off after upstream mergers, since they induce more entry into that segment. When social welfare is evaluated, a limit on upstream consolidation may prevent excessive entry; but upstream entry can be sometimes insufficient, if the retailers' intrinsic bargaining power is excessive.  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