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   13282篇
  免费   328篇
  国内免费   1篇
财政金融   2415篇
工业经济   1134篇
计划管理   2224篇
经济学   2910篇
综合类   183篇
运输经济   104篇
旅游经济   217篇
贸易经济   2269篇
农业经济   685篇
经济概况   1460篇
信息产业经济   1篇
邮电经济   9篇
  2021年   84篇
  2020年   151篇
  2019年   202篇
  2018年   242篇
  2017年   257篇
  2016年   255篇
  2015年   188篇
  2014年   269篇
  2013年   1299篇
  2012年   384篇
  2011年   428篇
  2010年   359篇
  2009年   420篇
  2008年   337篇
  2007年   386篇
  2006年   340篇
  2005年   257篇
  2004年   268篇
  2003年   252篇
  2002年   288篇
  2001年   250篇
  2000年   279篇
  1999年   233篇
  1998年   244篇
  1997年   239篇
  1996年   234篇
  1995年   202篇
  1994年   212篇
  1993年   208篇
  1992年   255篇
  1991年   232篇
  1990年   188篇
  1989年   161篇
  1988年   156篇
  1987年   196篇
  1986年   192篇
  1985年   261篇
  1984年   283篇
  1983年   262篇
  1982年   232篇
  1981年   230篇
  1980年   224篇
  1979年   234篇
  1978年   148篇
  1977年   140篇
  1976年   101篇
  1975年   130篇
  1974年   93篇
  1973年   93篇
  1971年   77篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
32.
33.
This article explores the price of continuously sampled Asian options. For geometric Asian options, we present pricing formulas for both backward‐starting and forward‐starting cases. For arithmetic Asian options, we demonstrate that the governing partial differential equation (PDE) cannot be transformed into a heat equation with constant coefficients; therefore, these options do not have a closed‐form solution of the Black–Scholes type, that is, the solution is not given in terms of the cumulative normal distribution function. We then solve the PDE with a perturbation method and obtain an analytical solution in a series form. Numerical results show that as compared with Zhang's ( 2001 ) highly accurate numerical results, the series converges very quickly and gives a good approximate value that is more accurate than any other approximate method in the literature, at least for the options tested in this article. Graphical results determine that the solution converges globally very quickly especially near the origin, which is the area in which most of the traded Asian options fall. © 2003 Wiley Periodicals, Inc. Jrl Fut Mark 23:535–560, 2003  相似文献   
34.
An Internet presence is a critical early component in the process of building towards a fully operational and unified e‐commerce strategy. E‐commerce has significantly impacted logistics/supply chain strategies and the development and implementation of a website have become key issues for many firms within the transportation industry. This study provides an overview of website content within the motor carrier industry. Content analysis was used to assess the site design, informational content, and the interactive content of 152 motor carrier websites, and to compare the features offered on the Top 100 motor carrier firm websites with those offered on the sites of smaller carrier firms.  相似文献   
35.
This article introduces and explores the concept of brand name imprinting. Brand name imprinting is the process of creating and strengthening the brand name node in the brand memory network through brand name exposure. Brand name imprinting at a time prior to the presentation of specific brand information is posited to improve the retention of that information by strengthening the association between the brand name and brand information. The effect is proposed to be automatic and independent of other known means to strengthen memory associations (e.g., level of attention, cognitive elaboration, stimuli vividness, and stimuli distinctiveness). This research also proposes that brand names with neutral meaning better facilitate the imprinting effect, because they do not carry perceptual baggage that can interfere with the creation of new brand name–information associations. An experiment involving brand name imprinting and the learning of brand information supports these assertions. Implications for communication strategy and brand name selection are discussed. © 2003 Wiley Periodicals, Inc.  相似文献   
36.
Firms in developing countries cite credit constraints as one of their primary obstacles to investment. Direct foreign investment may ease credit constraints by bringing in scarce capital. Alternatively, if foreign firms borrow heavily from domestic banks, they may crowd local firms out of domestic capital markets. Using firm data from the Ivory Coast, we test whether: (1) domestic firms are more credit constrained than foreign firms, and (2) whether borrowing by foreign firms exacerbates domestic firm credit constraints. Results provide support for both hypotheses. We also find that state-owned enterprises (SOEs) are less financially constrained than other domestic enterprises.  相似文献   
37.
This paper provides an evaluation of the spinoff of a for-profit company from the American Institute of Certified Public Accountants (AICPA), a nonprofit professional association. The evaluation is based on a review of the literature on public policy issues surrounding organizational conversions from nonprofit to for-profit legal status. Many criticisms of this for-profit spinoff were voiced by professional leaders and accounting regulators, and we demonstrate that these criticisms are grounded in widely recognized policy principles relating to nonprofit conversions. The public policy issues raised by this study have implications for the governance of professional associations in all disciplines.  相似文献   
38.
39.
When assessing farming strategies, it is important to account for the opportunities provided for tactically adjusting to outcomes of risk. The hypothesis that accounting for tactical adjustment is more important than accounting for risk attitude was supported in this study with regard to identifying the optimal drainage recirculation strategy for an irrigated dairy farm. Failing to account for tactical adjustment would lead to a sub-optimal choice, costing the farmer about A$3 100 in present value terms. In contrast, failing to account for risk aversion would not affect the strategy chosen. The distribution method was found to be well suited to modelling tactical adjustment.  相似文献   
40.
Cash settlement of derivative contracts makes them susceptible to manipulation by traders who expect to close large positions upon final settlement. Cash settlement also increases underlying volatility when hedgers unwind their hedges if they have no incentives to control their trading costs. Limits on the positions that traders can carry into final settlement can be used to mitigate associated economic inefficiencies when surveillance is insufficient. This article develops a model that regulators can use to set these limits that is based upon microstructure theory. The empirical findings indicate that existing position limits are largely inconsistent with those suggested by the model. © 2005 Wiley Periodicals, Inc. Jrl Fut Mark 25:945–965, 2005  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