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   13946篇
  免费   1554篇
财政金融   2803篇
工业经济   1381篇
计划管理   2783篇
经济学   3033篇
综合类   88篇
运输经济   219篇
旅游经济   242篇
贸易经济   2868篇
农业经济   812篇
经济概况   1268篇
邮电经济   3篇
  2023年   62篇
  2021年   157篇
  2020年   325篇
  2019年   711篇
  2018年   463篇
  2017年   621篇
  2016年   590篇
  2015年   560篇
  2014年   643篇
  2013年   1699篇
  2012年   690篇
  2011年   695篇
  2010年   619篇
  2009年   604篇
  2008年   616篇
  2007年   496篇
  2006年   491篇
  2005年   424篇
  2004年   388篇
  2003年   397篇
  2002年   366篇
  2001年   311篇
  2000年   285篇
  1999年   223篇
  1998年   199篇
  1997年   208篇
  1996年   169篇
  1995年   173篇
  1994年   158篇
  1993年   149篇
  1992年   132篇
  1991年   128篇
  1990年   115篇
  1989年   103篇
  1988年   92篇
  1987年   107篇
  1986年   76篇
  1985年   121篇
  1984年   145篇
  1983年   133篇
  1982年   113篇
  1981年   87篇
  1980年   96篇
  1979年   85篇
  1978年   66篇
  1977年   63篇
  1976年   62篇
  1975年   35篇
  1974年   50篇
  1973年   45篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
151.
In this continuing discussion on the role of industrial improvement areas the author extends the arguments to suggest how IIAs could be a progressive planning tool linking economic, property and land-use strategies.  相似文献   
152.
The purpose of this paper is to examine changes in stock return variances following option introduction. The sample consists of National Market System stocks and employs both transaction returns and returns based on bid and ask quotes. Variances are decomposed into portions attributable to bid-ask spreads, return autocorrelations, and intrinsic variances. Spreads play a negligible role in explaining variance changes. A generally positive component to short-term autocorrelations falls following option introduction, increasing variances over short holding periods. Intrinsic variances fall prior to the October 1987 crash, but do not change after the crash with option introduction.  相似文献   
153.
The economic impact of adopting herd health programs for mastitis and reproduction by small-scale dairy producers of Central Thailand was assessed using a policy analysis matrix (PAM). Following a reduction in the incidence of bovine disease on adopter farms, an increase in private net profits is observed. More importantly the social costs of supporting dairy farmers is reduced; the PAM effective protection coefficient was reduced by 35% for mastitis program adopters and by 44% for reproductive program adopters, indicating improved social efficiency of dairy policy. Other indicators of efficiency and policy implications are discussed.  相似文献   
154.
155.
This article examines the performance of index equity funds in Australia. Despite the significant growth in index funds since 1976, when the first index mutual fund was launched in the U.S., research on their performance is sparse in the U.S. and non-existent in Australia. This study documents the existence of significant tracking error for Australian index funds. For example, the magnitude of the difference between index fund returns and index returns averages between 7.4 and 22.3 basis points per month across index funds operating for more than five years. However, there is little evidence of bias in tracking error implying that these funds neither systematically outperform nor underperform their benchmark on a before cost basis. Further analysis provides evidence that the magnitude of tracking error is related to fund cash flows, market volatility, transaction costs and index replication strategies used by the manager.  相似文献   
156.
Learning about Internal Capital Markets from Corporate Spin-offs   总被引:5,自引:0,他引:5  
We examine the investment behavior of firms before and after being spun off from their parent companies. Their investment after the spin-off is significantly more sensitive to measures of investment opportunities (e.g., industry Tobin's Q or industry investment) than it is before the spin-off. Spin-offs tend to cut investment in low Q industries and increase investment in high Q industries. These changes are observed primarily in spin-offs of firms in industries unrelated to the parents' industries and in spin-offs where the stock market reacts favorably to the spin-off announcement. Our findings suggest that spin-offs may improve the allocation of capital.  相似文献   
157.
Several studies estimate the demand for watching English professional football (soccer) as highly inelastic, a puzzling result given that clubs appear to possess a degree of monopoly power. We discuss weaknesses in earlier studies and offer an alternative method of assessing elasticity based on travel costs of spectators living different distances from the grounds. We find that elasticity varies across the 20 senior clubs for which data were available but in almost every case demand is more elastic than reported in the existing literature and pricing policy appears therefore to be more orientated towards profit maximisation than previously thought.  相似文献   
158.
Effectively managing the 'upfront or fuzzy front–end' (FFE) of the product development process is one of the most important, difficult challenges facing innovation managers. In this paper, we define the FFE as the period between when an opportunity is first considered and when an idea is judged ready for development. We classify the outcomes of the FFE into product definition, time, and people dimensions. We suggest several strategies to manage the FFE by assigning a FFE manager or team; by providing organizational support for FFE activities; by understanding the sources of FFE ambiguity; by building an information system; and by developing relationships with supporters, partners, and alliances.  相似文献   
159.
160.
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