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   7844篇
  免费   201篇
财政金融   1759篇
工业经济   615篇
计划管理   1175篇
经济学   1767篇
综合类   141篇
运输经济   47篇
旅游经济   122篇
贸易经济   1589篇
农业经济   262篇
经济概况   565篇
邮电经济   3篇
  2023年   34篇
  2021年   61篇
  2020年   94篇
  2019年   149篇
  2018年   128篇
  2017年   125篇
  2016年   152篇
  2015年   126篇
  2014年   147篇
  2013年   845篇
  2012年   237篇
  2011年   266篇
  2010年   240篇
  2009年   266篇
  2008年   282篇
  2007年   257篇
  2006年   257篇
  2005年   256篇
  2004年   226篇
  2003年   237篇
  2002年   214篇
  2001年   167篇
  2000年   172篇
  1999年   145篇
  1998年   165篇
  1997年   136篇
  1996年   140篇
  1995年   127篇
  1994年   124篇
  1993年   122篇
  1992年   115篇
  1991年   101篇
  1990年   96篇
  1989年   82篇
  1988年   74篇
  1987年   95篇
  1986年   86篇
  1985年   156篇
  1984年   134篇
  1983年   149篇
  1982年   94篇
  1981年   105篇
  1980年   93篇
  1979年   91篇
  1978年   93篇
  1977年   110篇
  1976年   91篇
  1975年   67篇
  1974年   45篇
  1973年   57篇
排序方式: 共有8045条查询结果,搜索用时 234 毫秒
911.
Stochastic dynamic programming is used to investigate optimal holding of primary tropical forest in humid Costa Rica when future nonuse benefits of forest conservation are uncertain and increasing. The quasi-option value of maintaining primary forests is included as a component of investment in natural capital. Although the impact of uncertainty on conservation incentives is substantial, our results indicate that a rising trend in future benefits and compensation by the international community for beneficial spillovers are more important factors in determining optimal holdings of forest stocks. Without compensatory payments, however, further deforestation may be warranted.  相似文献   
912.
Handling failure and blame is key to managerial success. But roughly 70 % of Americans have a personality type that tends to react inappropriately when things go wrong. Some people are extrapunitive, always pointing a finger at someone else. Others are impunitive, denying there's a problem or that they played any role. And still others are intrapunitive, heaping too much blame on themselves and seeing disasters where none exist. Fortunately, there are ways to fix such flawed responses. The first step is to cultivate self-awareness; several personality tests can help you assess your interaction style. Next, deepen your political awareness to better understand what messages others are receiving. Once you've identified your bad habits, you can move toward more-adaptive responses. Dattner and Hogan describe several strategies that can benefit any of the personality types. You should make sure to listen and communicate well, reflect on the situation and the people involved, think carefully before acting, and look for lessons when mistakes do happen. Using detailed examples, the authors illustrate how people with the various personality types are apt to react to specific failures and explain what they might do differently. They also offer insights to help you recognize when your bosses, peers, or subordinates fit into one of the problematic categories and suggest ways to influence their behavior. The taxonomy and tactics they present will help you approach failure with an open mind and react in a balanced, constructive way.  相似文献   
913.
The 1987 market crash was associated with a dramatic and permanent steepening of the implied volatility curve for equity index options, despite minimal changes in aggregate consumption. We explain these events within a general equilibrium framework in which expected endowment growth and economic uncertainty are subject to rare jumps. The arrival of a jump triggers the updating of agents' beliefs about the likelihood of future jumps, which produces a market crash and a permanent shift in option prices. Consumption and dividends remain smooth, and the model is consistent with salient features of individual stock options, equity returns, and interest rates.  相似文献   
914.
Hospitals should take several steps in using data from the Program for Evaluating Payment Patterns Report (PEPPER) to enhance compliance efforts and identify risk areas for improper payments: Designate one person to monitor PEPPER releases and download the quarterly report. Review the reports and list all areas where the hospital is most at risk for improper payments. Prioritize at-risk areas with the national comparison, followed by jurisdictional and state comparison. Conduct small-sample case reviews in at-risk areas and determine next steps, such as process improvement or rebilling. Include hospital finance, compliance, legal, case management, and coding experts as part of discussion.  相似文献   
915.
A study of 386 potential and current members of the accounting profession in Australia and South‐East Asia provides evidence of the importance of three attributes – brand/reputation, international recognition of qualifications and career opportunities – in the decision to join a professional accounting body. While these attributes are important, logit regression models indicate that they are not discriminatory in the choice of professional body and suggest a perception of a collective, undifferentiated accounting profession. The marketing of brand/reputation and membership benefits may be a more efficient and effective strategy in attracting members and differentiating the profession if undertaken by a combined or coordinated professional body.  相似文献   
916.
We analyze how the unique characteristics of real estate investment trusts (REITs) affect IPO lockup agreements from 1980 to 2006. The findings show that, unlike industrial IPOs, lockup periods for REIT IPOs do not cluster at 180 days, tend to cover longer periods, and vary over time. Our results support the commitment device hypothesis instead of the signaling hypothesis. That is, REIT managers tend to use lockup agreements to alleviate moral hazard problems and protect post-IPO investors rather than to send signals to investors. Finally, contrary to previous studies, we find no significant negative abnormal returns around the unlock date for the whole sample. The lack of aggressive sales by insiders and the fact that REITs are not backed by venture capitalists can explain our finding.  相似文献   
917.
The crisis in the UK financial services industry has led to retail banking customers treating transactions with growing scepticism. Retail banks are having to work very hard to regain customer trust. Despite recent research in marketing that acknowledges the importance of service loyalty to service firms, studies that have examined the relative effects of trust and the different types of switching costs on attitudinal and behavioural loyalty are scant. Therefore this article aims to build a model to examine the strength of the relationships between these constructs. Using survey data collected from a convenience sample of 290 retail banking customers in the United Kingdom, the article reveals that the main drivers of attitudinal loyalty are trust and relational switching costs. In contrast, the main drivers of behavioural loyalty are trust, relational switching costs and attitudinal loyalty. Interestingly, financial and procedural switching costs exert no significant effect on either attitudinal or behavioural loyalty. Trust and relational switching costs exert a stronger effect on attitudinal than behavioural loyalty.  相似文献   
918.
Recent research has highlighted the quantitative contribution to merger analysis from extending unilateral effects models to understand the payoffs to future potential coordinated effects. Some of the emphasis of this research appears to have made its way into the 2010 Horizontal Merger Guidelines. In this paper, we demonstrate the quantification of coordinated effects in an oligopoly and procurement model, and we show that screens that are based on upward pricing pressure are not adequate in mergers where coordinated effects are a potential concern.  相似文献   
919.
920.
In this work we introduce the forecasting model with which we participated in the NN5 forecasting competition (the forecasting of 111 time series representing daily cash withdrawal amounts at ATM machines). The main idea of this model is to utilize the concept of forecast combination, which has proven to be an effective methodology in the forecasting literature. In the proposed system we attempted to follow a principled approach, and make use of some of the guidelines and concepts that are known in the forecasting literature to lead to superior performance. For example, we considered various previous comparison studies and time series competitions as guidance in determining which individual forecasting models to test (for possible inclusion in the forecast combination system). The final model ended up consisting of neural networks, Gaussian process regression, and linear models, combined by simple average. We also paid extra attention to the seasonality aspect, decomposing the seasonality into weekly (which is the strongest one), day of the month, and month of the year seasonality.  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