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   10009篇
  免费   226篇
  国内免费   1篇
财政金融   1797篇
工业经济   824篇
计划管理   1764篇
经济学   2269篇
综合类   222篇
运输经济   48篇
旅游经济   138篇
贸易经济   1592篇
农业经济   406篇
经济概况   1141篇
信息产业经济   1篇
邮电经济   34篇
  2020年   116篇
  2019年   144篇
  2018年   191篇
  2017年   227篇
  2016年   205篇
  2015年   147篇
  2014年   210篇
  2013年   941篇
  2012年   298篇
  2011年   286篇
  2010年   273篇
  2009年   318篇
  2008年   295篇
  2007年   265篇
  2006年   213篇
  2005年   188篇
  2004年   201篇
  2003年   195篇
  2002年   164篇
  2001年   206篇
  2000年   212篇
  1999年   180篇
  1998年   180篇
  1997年   205篇
  1996年   179篇
  1995年   184篇
  1994年   168篇
  1993年   167篇
  1992年   198篇
  1991年   192篇
  1990年   153篇
  1989年   152篇
  1988年   123篇
  1987年   120篇
  1986年   127篇
  1985年   181篇
  1984年   156篇
  1983年   172篇
  1982年   140篇
  1981年   170篇
  1980年   140篇
  1979年   162篇
  1978年   134篇
  1977年   121篇
  1976年   128篇
  1975年   106篇
  1974年   104篇
  1973年   86篇
  1972年   64篇
  1971年   58篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
Burg B 《Medical economics》1993,70(19):40-2, 45-6, 48 passim
  相似文献   
103.
104.
Three general types of problems entail different strategies. Continuing to seek solutions to tame problems when we face messes, let alone wicked problems, is potentially catastrophic hence fundamentally irresponsible. In our turbulent times, it is therefore becoming a strategic necessity to learn how to solve the right problems.

But then, you may agree that it becomes morally objectionable for the planner to treat a wicked problem as though it were a tame one, or to tame a wicked problem prematurely, or to refuse to recognize the inherent wickedness of social problems. Rittel and Webber (1973).

Jonathan King is Associate Professor of Management at the College of Business at Oregon State University. His primary research interests are in the areas of moral philosophy and modern technology. His most important publications are Confronting Chaos and Common Knowledge of the Second Kind,Journal of Business Ethics (1989).  相似文献   
105.
106.
Jackknifing Bond Option Prices   总被引:2,自引:0,他引:2  
Prices of interest rate derivative securities depend cruciallyon the mean reversion parameters of the underlying diffusions.These parameters are subject to estimation bias when standardmethods are used. The estimation bias can be substantial evenin very large samples and much more serious than the discretizationbias, and it translates into a bias in pricing bond optionsand other derivative securities that is important in practicalwork. This article proposes a very general and computationallyinexpensive method of bias reduction that is based on Quenouille's(1956; Biometrika, 43, 353–360) jackknife. We show howthe method can be applied directly to the options price itselfas well as the coefficients in the models. We investigate itsperformance in a Monte Carlo study. Empirical applications toU.S. dollar swap rates highlight the differences between bondand option prices implied by the jackknife procedure and thoseimplied by the standard approach. These differences are largeand suggest that bias reduction in pricing options is importantin practical applications.  相似文献   
107.
Frictions, Heterogeneity and Optimality in Mortgage Modeling   总被引:1,自引:0,他引:1  
The purpose of this article is to provide a unified framework for incorporating frictions into a theoretical options-pricing model (OPM) for mortgages. This article presents formulation for a frictions-adjustable mortgage model that integrates borrower heterogeneity while simultaneously preserving prepayment and default financial decisions. Our model demonstrates the flexibility of the OPM by simulating separate and concurrent effects of three categories of frictions on the mortgage and mortgage components. Researchers can use our example formulation to determine the effects of specific borrower characteristics on mortgage values without destroying the options theoretic framework.  相似文献   
108.
This study investigates the influence of the source of R&D funds and management ownership on R&D productivity. The lagged effect of the source of R&D funds on R&D output is investigated for a sample of US manufacturing firms in five industries over the 1996–99 period. Estimates based on 779 firm-years show that R&D productivity increases with the proportion of stock held by managers and directors of firms primarily in the Other Electronics industry. The estimates also show that recipients of government-sponsored R&D funds in the Chemicals industry have lower levels of output (sales) for each dollar committed to R&D. In addition, output for firms in the Chemicals industry worsens as management stockholding increases, implying an agency cost rationale for the observed difference in output. The implication is that firms with high manager-owner content are less productive with government-sponsored R&D than with company-financed R&D. The reported results suggest that potential agency costs should be incorporated in government-sponsored R&D contracts. It also suggests that the source of R&D funds should be disclosed and incorporated into the valuation of intangible assets attributable to research and development.  相似文献   
109.
This paper investigates the influence of industry uncertainty on the decision by established firms to enter a new industry. Specifically, we examine the tension between the option to defer , which discourages entry in the presence of uncertainty, and the option to grow , which may encourage entry in the presence of uncertainty when there are early mover advantages. Empirical analysis on data from a broad array of industries revealed that the effect of uncertainty on entry is not monotonic. Our findings are the first to find support for the nonmonotonic effect of uncertainty that has only recently emerged in theoretical treatments of real options theory, and amplify the importance of considering both the option to defer and the option to grow when contemplating entry. Furthermore, we found evidence that the relationship between uncertainty and entry is moderated by: (a) irreversibility, which influences the value of the option to defer; (b) the total value of growth opportunities; and (c) early mover advantages, which magnify the value of growth options. Copyright © 2003 John Wiley & Sons, Ltd.  相似文献   
110.
Advertised food specials may be deceptive to consumers who mistake the advertised prices as reduced prices. Of all the advertised food specials examined in this research, at least 13 percent and as many as 25 percent of those advertised in newspapers were not reduced in price.  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