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   6782篇
  免费   48篇
财政金融   1305篇
工业经济   497篇
计划管理   1335篇
经济学   1432篇
综合类   57篇
运输经济   60篇
旅游经济   107篇
贸易经济   1217篇
农业经济   220篇
经济概况   568篇
信息产业经济   1篇
邮电经济   31篇
  2024年   27篇
  2023年   33篇
  2022年   31篇
  2021年   73篇
  2020年   113篇
  2019年   151篇
  2018年   177篇
  2017年   202篇
  2016年   197篇
  2015年   154篇
  2014年   213篇
  2013年   761篇
  2012年   258篇
  2011年   285篇
  2010年   255篇
  2009年   295篇
  2008年   252篇
  2007年   244篇
  2006年   202篇
  2005年   198篇
  2004年   186篇
  2003年   198篇
  2002年   168篇
  2001年   143篇
  2000年   150篇
  1999年   142篇
  1998年   136篇
  1997年   104篇
  1996年   119篇
  1995年   90篇
  1994年   93篇
  1993年   87篇
  1992年   89篇
  1991年   90篇
  1990年   60篇
  1989年   45篇
  1988年   42篇
  1987年   54篇
  1986年   49篇
  1985年   70篇
  1984年   56篇
  1983年   52篇
  1982年   51篇
  1981年   51篇
  1980年   44篇
  1979年   46篇
  1978年   28篇
  1977年   29篇
  1976年   28篇
  1974年   26篇
排序方式: 共有6830条查询结果,搜索用时 0 毫秒
51.
    
This article considers the problem of testing for cross‐section independence in limited dependent variable panel data models. It derives a Lagrangian multiplier (LM) test and shows that in terms of generalized residuals of Gourieroux et al. (1987) it reduces to the LM test of Breusch and Pagan (1980) . Because of the tendency of the LM test to over‐reject in panels with large N (cross‐section dimension), we also consider the application of the cross‐section dependence test (CD) proposed by Pesaran (2004) . In Monte Carlo experiments it emerges that for most combinations of N and T the CD test is correctly sized, whereas the validity of the LM test requires T (time series dimension) to be quite large relative to N. We illustrate the cross‐sectional independence tests with an application to a probit panel data model of roll‐call votes in the US Congress and find that the votes display a significant degree of cross‐section dependence.  相似文献   
52.
Efforts to improve public agricultural research efficiency include calls to increase use of competitive grants. This paper empirically assesses different instruments the USDA uses to fund state-level research. Compared with other instruments, competitive grants focus more on basic research and are concentrated among fewer states. Model results suggest that top-ranked biology and agricultural science programs were strong determinants of states' shares of competitive grants. Other significant factors were agricultural sector size and number of agricultural scientists. USDA-funded state-level research focus did not change significantly because competitive grants comprised only 15% of these funds and other instruments counteracted their influence.  相似文献   
53.
The adaptive markets hypothesis posits that trading strategies evolve as traders adapt their behavior to changing circumstances. This paper studies the evolution of trading strategies for a hypothetical trader who chooses portfolios from foreign exchange (forex) technical rules in major and emerging markets, the carry trade, and US equities. The results show that a backtesting procedure to choose optimal portfolios improves upon the performance of nonadaptive rules. We also find that forex trading alone dramatically outperforms the S&P 500, with much larger Sharpe ratios over the whole sample, but there is little gain to coordinating forex and equity strategies, which explains why practitioners consider these tools separately. Forex trading returns dip significantly in the 1990s but recover by the end of the decade and have been markedly superior to an equity position since 1998. Overall, trading rule returns still exist in forex markets—with substantial stability in the types of rules—though they have migrated to emerging markets to a considerable degree.  相似文献   
54.
Our introduction to this compendium reviews Alfred Kahn’s academic and policy interests, his activities as a regulator and advisor to governments and companies, and the interactions between these aspects of his life as an economist. Although best known for his research on the economics of regulation and his application of microeconomic principles in his role as a regulator and advisor, Kahn’s academic research portfolio was much more diverse. He wrote about patent policy, economic development, antitrust policy, and other topics, in addition to his work on regulation and deregulation. Even before becoming a regulator he was actively involved in applying economic principles to regulatory problems as an advisor and consultant. In all of his work Kahn recognized that markets were imperfect, but that policies aimed at improving market performance often made things worse. His experience as a regulator and consultant strengthened his recognition that the costs of imperfect regulation had to be carefully balanced against the costs of imperfect markets. One had to search for the best that could be done in an imperfect world. Kahn was particularly fascinated by the challenges of designing and implementing policies to govern the transition from regulated monopoly or oligopoly to an industry that would ultimately rely primarily on competitive markets to govern firm behavior and performance. Fred Kahn was an extraordinary man who is missed greatly by his many friends and colleagues representing a wide range of political orientations and approaches to economic and public policy analysis.  相似文献   
55.
We investigate the relationship between earnings persistence and a broad measure of total accruals (TACC). We propose and find that in Australia, TACC is less persistent than cash flows. We further propose that the persistence of accrual components is positively associated with the reliability of those components. However, we find that the least reliable accrual component has the greatest persistence and suggest possible reasons for this. We then investigate the relationship between earnings persistence and managerial share ownership, but find no evidence of a consistent, strong relationship. Rather, for the non-current operating accruals we find evidence consistent with incentive alignment for large firms with high operating cash flows, whereas for small firms we find evidence consistent with efficient contracting.  相似文献   
56.
We combine natural science modelling and valuation techniques to present economic analyses of a variety of land use change scenarios generated for the UK National Ecosystem Assessment. Specifically, the agricultural, greenhouse gas, recreational and urban greenspace impacts of the envisioned land use changes are valued. Particular attention is given to the incorporation of spatial variation in the natural environment and to addressing issues such as biodiversity impacts where reliable values are not available. Results show that the incorporation of ecosystem services and their values within analyses can substantially change decisions.  相似文献   
57.
    
  相似文献   
58.
The paper describes the evolution of focused demand chains over an extended period of time as a major UK lighting manufacturer has sought to remain an international player in a fast changing business environment. Analysis and design procedures make use of the concepts of Wickham Skinner and Marshall Fisher to answer the strategic questions “what facilities are required and how should they be laid out to enable the necessary focused demand chains?” and to answer the tactical question “which focused demand chain is appropriate for this product?” The case study then details how the company has been transformed from operating within a traditional supply chain to driving change via the engineering of four focused demand chains. The paper concludes with a comparison of operations enablers, customer choice, and business performance metrics covering the transition period culminating in the current focused demand chain scenario. By matching products to the appropriate value stream there is a consequential reduction in product development time of 75%; manufacturing costs reduction of up to 27%; and up to 95% reduction in delivery lead times.  相似文献   
59.
    
In an increasingly globalized world, organizations that operate in more than one country are a substantial part of the world economy. It is therefore beneficial to understand the attitudes of employees in different countries and their impact on the organization. One important area is organizational justice and its relationships with organizational trust (OT) and organizational commitment. This empirical study collected survey data from university employees across China, South Korea and Australia. We proposed that OT would mediate the relationships between affective organizational commitment (AOC) and both distributive justice (DJ) and procedural justice (PJ) in all three countries. In Australia, we found that PJ and AOC were significantly related, and OT fully mediated the PJ-AOC relationship. In China and South Korea, both DJ and PJ were significantly related to AOC, and OT fully mediated the PJ-AOC relationship. OT partially mediated the DJ-AOC relationship in China but fully mediated this relationship in South Korea. Implications for theory and for management practitioners are discussed, and areas for future investigation are identified.  相似文献   
60.
This paper explores whether entrepreneurship can help less successful regions to improve their regional economic situation, without all the benefits that entrepreneurship brings when being ‘stripped out’ to more successful regions. The paper uses the idea that peripheral regions possess qualities of tradition and underdevelopment, and that these help to anchor new firms into these regions, resistant to their concentration in core regions. The paper explores whether particular entrepreneurial events can be regarded as ‘densifying’ the regional entrepreneurial environment, thereby making a positive contribution to its economic development. The paper explores the role of these negative anchors to the entrepreneurial events and the densification process by following a sequence of high-technology spin-out firms in the North East of England. Using a realist methodology attempting to interview all the firms within the sequence which could be found, the paper discovers that quite positive advantages exist within these negative qualities.The paper then considers whether these processes, such as plant closure, might drive entrepreneurship in all regions.  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