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   3645篇
  免费   178篇
财政金融   814篇
工业经济   282篇
计划管理   513篇
经济学   705篇
综合类   27篇
运输经济   86篇
旅游经济   279篇
贸易经济   786篇
农业经济   60篇
经济概况   264篇
邮电经济   7篇
  2023年   39篇
  2022年   25篇
  2021年   40篇
  2020年   89篇
  2019年   137篇
  2018年   177篇
  2017年   181篇
  2016年   153篇
  2015年   99篇
  2014年   164篇
  2013年   642篇
  2012年   186篇
  2011年   186篇
  2010年   178篇
  2009年   173篇
  2008年   136篇
  2007年   104篇
  2006年   70篇
  2005年   84篇
  2004年   81篇
  2003年   89篇
  2002年   100篇
  2001年   57篇
  2000年   40篇
  1999年   47篇
  1998年   44篇
  1997年   31篇
  1996年   38篇
  1995年   39篇
  1994年   33篇
  1993年   34篇
  1992年   28篇
  1991年   35篇
  1990年   14篇
  1989年   17篇
  1988年   18篇
  1987年   15篇
  1986年   19篇
  1985年   17篇
  1984年   12篇
  1983年   21篇
  1982年   19篇
  1981年   16篇
  1980年   13篇
  1979年   15篇
  1978年   9篇
  1977年   14篇
  1976年   5篇
  1973年   10篇
  1971年   5篇
排序方式: 共有3823条查询结果,搜索用时 15 毫秒
161.
As the amount of information is rapidly growing, and ubiquitous urban environments are emerging, the question which kind of information to provide is a major challenge for commercial and public travel-information service providers alike. This paper reports the analyses of recent data, collected in Metropolitan Seoul, about the acquisition of travel information. The study applies CHAID analysis to find homogeneous segments in travel information acquisition. Findings indicate that contextual variables are crucial to explain information acquisition behaviour, depending on decision context. The implication is that both socioeconomic and contextual variables are important to better understand the acquisition (and provision) of travel information. The results have important implications for managers and policy-makers, in particular in the way they respond to dynamic, contextual market segmentation.  相似文献   
162.
The customisation framework for roadmapping product-service integration   总被引:2,自引:2,他引:0  
Product-service integration is becoming a dominant contemporary trend, motivated by how technology can shape areas of potential product/service interactivity and triggers interactions. Since the role of technology differs from case to case, the strategic planning of product-service integration should focus on accommodating the real-life business situation. In response, this paper suggests a customisation framework for product-service roadmapping according to the technological interface involved, and provides practical guidance in its implementation. This framework consists of five steps in three main stages. The first deals with the structural determination of roadmapping, planning ??what to plan??, determining the role of technology and the roadmapping format. The second phase plans the functional determination, dealing the issue of ??how to plan??, including deciding on the relevant roadmapping procedures and methodology. Finally, the roadmap for product-service integration is developed. To illustrate the workings of proposed approach, six case examples are provided for different modes of integration, providing a practical illustration for product-service integration.  相似文献   
163.
164.
165.
Research Summary: Combining studies on real options theory and economic short‐termism, we propose that, depending on CEOs’ career horizons, CEOs have heterogeneous interests in strategic flexibility, and thus, have different incentives to make real options investments. We argue that compared to CEOs with longer career horizons, CEOs with shorter career horizons will be less inclined to make real options investments because they may not fully reap the rewards during their tenure. In addition, we argue that long‐term incentives and institutional ownership will mitigate the relationship between CEOs’ career horizons and real options investments. U.S. public firms as an empirical setting produced consistent evidence for our predictions. Our study is the first to theoretically explain and empirically show that a CEO's self‐seeking behavior will impact real options investments. Managerial Summary: This article helps to explain how a CEO's self seeking‐behavior may shape a firm's real option investment, which could result in different level of strategic flexibility. We argue that CEOs with short career horizons have less time to exercise their firms’ real options, which should lower the investments in the firms’ real options portfolios relative to CEOs with long career horizons. We study a sample of U.S. public firms and find strong evidence that a CEO's expected tenure in the firm is positively related to the real options investments at the firm level. We find that this agency issue can be mitigated by adopting appropriate corporate governance mechanisms such as long‐term incentives and institutional investors.  相似文献   
166.
167.
In proposing the concept of flow which focuses on experiencing the sites visited by Korean Wave tourists as induced by drama or movies, the role of involvement level (variables) of Korean Wave tourists in influencing flow construct as they experience the sites of FIT (Film Induced Tourism) was investigated. The involvement level of Korean Wave visitors was found to operate as a mechanism by which challenge, skills, and focused attention on site might be more organized or more actively experienced. This recognizes that there is clearly a need for making the FIT sites exposed much by any mix of various media. The findings of this study showed that challenges and skills influence enjoyment as an output factor of flow. Film site visitors are assumed to participate in the roles of film characters, experiencing the places and the atmosphere. The degree of visitors' reflections of the film optimizes awareness of flow experiences on the site. Therefore it is necessary to provide more detailed experiential programs on the film sites with a wide variety of flow-related contents in the film.  相似文献   
168.

In this study, an appropriate nonparametric two-step approach to conditional efficiencies is used to investigate how size and time affect the performance of companies. Using a dataset of Italian manufacturing firms over the period 2006–2015, we explore the effect of size on the attainable production set (input-output space) and on the efficiency distribution, without making any a priori assumptions on the role of size on efficiency. Main findings suggest that size positively affects the efficiency of companies. By exploring the idiosyncratic efficiency, an additional empirical result from the conditional efficiency approach shows that the economic disparities between North, Centre and South of Italy not only limit the foreign investment but also seem to penalize the productivity of Italian-owned companies.

  相似文献   
169.
GMM and 2SLS estimation of mixed regressive,spatial autoregressive models   总被引:2,自引:0,他引:2  
The GMM method and the classical 2SLS method are considered for the estimation of mixed regressive, spatial autoregressive models. These methods have computational advantage over the conventional maximum likelihood method. The proposed GMM estimators are shown to be consistent and asymptotically normal. Within certain classes of GMM estimators, best ones are derived. The proposed GMM estimators improve upon the 2SLS estimators and are applicable even if all regressors are irrelevant. A best GMM estimator may have the same limiting distribution as the ML estimator (with normal disturbances).  相似文献   
170.
This paper considers identification and estimation of structural interaction effects in a social interaction model. The model allows unobservables in the group structure, which may be correlated with included regressors. We show that both the endogenous and exogenous interaction effects can be identified if there are sufficient variations in group sizes. We consider the estimation of the model by the conditional maximum likelihood and instrumental variables methods. For the case with large group sizes, the possible identification can be weak in the sense that the estimates converge in distribution at low rates.  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