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   2046篇
  免费   48篇
财政金融   384篇
工业经济   215篇
计划管理   336篇
经济学   477篇
综合类   15篇
运输经济   4篇
旅游经济   31篇
贸易经济   380篇
农业经济   69篇
经济概况   183篇
  2023年   12篇
  2020年   21篇
  2019年   29篇
  2018年   40篇
  2017年   45篇
  2016年   42篇
  2015年   29篇
  2014年   48篇
  2013年   320篇
  2012年   49篇
  2011年   64篇
  2010年   38篇
  2009年   71篇
  2008年   60篇
  2007年   49篇
  2006年   46篇
  2005年   47篇
  2004年   44篇
  2003年   62篇
  2002年   51篇
  2001年   42篇
  2000年   33篇
  1999年   40篇
  1998年   36篇
  1997年   36篇
  1996年   55篇
  1995年   33篇
  1994年   34篇
  1993年   48篇
  1992年   35篇
  1991年   29篇
  1990年   23篇
  1989年   28篇
  1988年   24篇
  1987年   35篇
  1986年   32篇
  1985年   38篇
  1984年   41篇
  1983年   17篇
  1982年   27篇
  1981年   28篇
  1980年   15篇
  1979年   26篇
  1978年   18篇
  1977年   24篇
  1975年   17篇
  1973年   8篇
  1972年   7篇
  1969年   8篇
  1967年   7篇
排序方式: 共有2094条查询结果,搜索用时 18 毫秒
21.
Corporate managers typically estimate the value of capital projects by discounting the project's expected future net cash flows at the cost of capital. The capital asset pricing model (CAPM) is generally used to estimate that cost. But, as anyone who has worked on the finance or business development staff of a public company can attest, there are major challenges in applying the CAPM, including largely unresolved questions about what constitutes the “market portfolio,” how to estimate market risk premiums, and how to estimate the betas of projects. In a short article published in Financial Management in 1988, Fischer Black proposed a valuation “discounting rule” that avoids all these problems—one that involves discounting a relatively certain (as opposed to an expected or average) level of operating cash flows at the risk-free rate. But Black's article does not address the question of how to calculate these “certainty equivalent” or “conditional” cash flows. In this article, the authors propose a way of implementing Black's rule that involves estimating the “conditional” cash flows in a three-step procedure:
  • • Find a benchmark security that correlates with the project's cash flows;
  • • Estimate the percentiles of the distribution in which the benchmark return equals the risk-free rate over different investment horizons;
  • • Use information from corporate managers to assess the cash flows that define the same percentiles in the cash flow distributions.
As the authors point out, the virtue of Black's rule is that it shifts the focus of the analyst away from the assessment of discount factors and puts it squarely on the more challenging, and arguably more relevant, problem of estimating the project's cash flows.  相似文献   
22.
23.
A bstract .   This article examines two mechanisms through which social networks are related to job mobility: (1) access to diverse sources of information about job openings and (2) nonredundant sources of influence. Using data on job changing and social networks among television station managers, we assess the extent to which job information and influence variables mediate the relationship between social network structure and getting a better job. Results indicate that there is an association between job mobility and having nonredundant contacts, but our measures of the information and influence mechanisms are not significant mediators. We conclude by reexamining the network-resource model that forms the basis for much of the research on the relationship between social networks and job mobility.  相似文献   
24.
This paper reports on a study of the networking and linkage practices of technology and non-technology firms within the Ottawa cluster. The work seeks to understand how and why particular patterns of networks and linkages evolve and it examines empirically the usage and value of networks and linkages. Previous work argues that technology firms need to be relatively more adept at developing external relationships in order to be successful than do non-technology based companies. This work, however, finds that technology firms exhibit fewer linkages than non-technology based companies do within the Ottawa cluster. The research suggests that the vitality of the Ottawa cluster could be further enhanced through the promotion of additional networking and linkages among regional firms. A key implication for management practice is that CEOs of technology-based firms should work towards establishing and maintaining additional valued relationships.  相似文献   
25.
Public policy making is a complex matter. Policy makers are charged with balancing a broad spectrum of competing objectives, reflecting in varying degrees the interests and aspirations of a diverse range of constituencies and stakeholders. Policy decisions have differential impacts on differing constituencies and the contributions of these impacts to objectives are frequently uncertain, difficult to quantify, and hotly disputed. Formal methods of decision analysis have been advanced as aids for coping with complexity and have been applied to some public policy issues, most notably the management of water resources. While formal methods have the apparent benefit of rationalizing the policy process and improving the efficacy and equity of policy decisions, serious questions remain concerning the acceptability and ultimate usefulness of formal analyses in the public arena. In this article we examine these questions in the context of policy making relating to government regulation of automobile designs for safety. We consider what would be involved in attempting to use a relatively modern, multiple-objective approach in this context. The key questions are how and, more importantly, why multiple-objective methods might be used. The article begins with an illustrative case study, describes the current policymaking process, identifies the parties involved in and affected by this process, elicits key objectives, looks briefly at some scalar-objective approaches, and then outlines a multiple-objective approach. The framework developed arguably is useful in assisting policy making, at least at a qualitative level. Issues which impede a more quantitative resolution of this framework are discussed. This article is intended as a pilot study which may promote research toward the achievement of a useable multiple-objective procedure applicable in the public domain.  相似文献   
26.
We experimentally investigate whether individuals can reliably detect cooperators (the nice(r) people) in an anonymous decision environment involving “connected games.” Participants can condition their choices in an asymmetric prisoners’ dilemma and a trust game on past individual (their partner’s donation share to a self-selected charity) and social (whether their partner belongs to a group with high or low average donations) information. Thus, the two measures of niceness are the individual donation share in the donation task, and the cooperativeness of one’s choice in the two games. We find that high donors achieve a higher-than-average expected payoff by cooperating predominantly with other high donors. Group affiliation proved to be irrelevant. Electronic Supplementary Material Supplementary material is available in the online version of this article at . JEL Classification C91, C72, D3  相似文献   
27.
Public sector associations have successfully developed and run employee health insurance pools for almost 30 years, providing members with savings and flexibility not available from commercial health insurance carriers. This article looks at the models, technical tools and governance philosophy that have contributed to their success in a very challenging business environment.  相似文献   
28.
Asymmetric demand responses to price changes are not an observable implication of classical demand theory, which predicts that consumers will react to a small price increase in much the same way as they do to a small price decrease. Yet applied researchers have long speculated that consumers are more sensitive to price increases than they are to price decreases. In addition, recent empirical studies generally support the theory of asymmetric demand responses. We construct a dynamic model based on data gathered from monthly telephone bills for 128 New York Telephone customers over a five-year period. Our results support the conclusion that customers react more quickly and strongly when prices go up than they do when prices go down.We would like to thank Manny Haas and Bernie Reddy for their comments and suggestions.  相似文献   
29.
30.
We summarize the literature on the effectiveness of combining forecasts by assessing the conditions under which combining is most valuable. Using data on the six US presidential elections from 1992 to 2012, we report the reductions in error obtained by averaging forecasts within and across four election forecasting methods: poll projections, expert judgment, quantitative models, and the Iowa Electronic Markets. Across the six elections, the resulting combined forecasts were more accurate than any individual component method, on average. The gains in accuracy from combining increased with the numbers of forecasts used, especially when these forecasts were based on different methods and different data, and in situations involving high levels of uncertainty. Such combining yielded error reductions of between 16% and 59%, compared to the average errors of the individual forecasts. This improvement is substantially greater than the 12% reduction in error that had been reported previously for combining forecasts.  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