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   30843篇
  免费   732篇
财政金融   5662篇
工业经济   2275篇
计划管理   5239篇
经济学   6972篇
综合类   322篇
运输经济   198篇
旅游经济   512篇
贸易经济   4784篇
农业经济   1489篇
经济概况   4051篇
邮电经济   71篇
  2021年   188篇
  2020年   302篇
  2019年   410篇
  2018年   592篇
  2017年   587篇
  2016年   553篇
  2015年   415篇
  2014年   616篇
  2013年   2996篇
  2012年   835篇
  2011年   915篇
  2010年   736篇
  2009年   877篇
  2008年   922篇
  2007年   834篇
  2006年   763篇
  2005年   715篇
  2004年   716篇
  2003年   695篇
  2002年   651篇
  2001年   652篇
  2000年   639篇
  1999年   557篇
  1998年   561篇
  1997年   539篇
  1996年   536篇
  1995年   487篇
  1994年   527篇
  1993年   529篇
  1992年   500篇
  1991年   521篇
  1990年   478篇
  1989年   398篇
  1988年   402篇
  1987年   395篇
  1986年   406篇
  1985年   585篇
  1984年   555篇
  1983年   544篇
  1982年   527篇
  1981年   450篇
  1980年   441篇
  1979年   462篇
  1978年   394篇
  1977年   357篇
  1976年   284篇
  1975年   276篇
  1974年   254篇
  1973年   247篇
  1972年   196篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
The influence of lagged adjustment and consumer spending on retail labour productivity is investigated. Both influences result in a procyclical productivity pattern.  相似文献   
82.
Forecast improvement is often approached by attempting to find the “best” model for a given situation. Less attention has been paid to the possibility of examining past prediction errors for patterns that may suggest forecast adjustments for the future. This empirical study involves one firm’s management judgment forecasts for product sales and the attempts made to improve their accuracy by removing certain types of bias. In three of the five series examined, error reduction averaging close to thirty percent occurs as a result of the adjustment procedure. The other two series proved to be relatively free from bias and were therefore not in need of the correction method described.  相似文献   
83.
84.
85.
Social marketing involves influencing voluntary behaviour of people towards a social end. Examples of social marketing range from campaigns to encourage healthy physical behaviour to efforts to encourage tax support for public education, overcome racism, or stimulate ‘patriotic’ behaviour. Using data from a summer 2001 telephone survey of 600 young adults, this paper investigates how recruitment campaigns may benefit from considering gender differences in importance ratings of a variety of benefits promoted by the military in the USA. Importance ratings are assessed using differences in means and variances tests. Findings identify gender specific differences that may be used to enhance recruitment campaigns. Copyright © 2004 Henry Stewart Publications  相似文献   
86.
We examine the costs and benefits of the global integrationof initial public offering (IPO) markets associated with thediffusion of U.S. underwriting methods in the 1990s. Bookbuildingis becoming increasingly popular outside the United States andtypically costs twice as much as a fixed-price offer. However,on its own, bookbuilding only leads to lower underpricing whenconducted by U.S. banks and/or targeted at U.S. investors. Formost issuers, the gains associated with lower underpricing outweighedthe additional costs associated with hiring U.S. banks or marketingin the United States. This suggests a quality/price trade-offcontrasting with the findings of Chen and Ritter, particularlysince non-U.S. issuers raising US$20 million–US$80 millionalso typically pay a 7% spread when U.S. banks and investorsare involved.  相似文献   
87.
The paper asks the question – as time series analysis moves from consideration of conditional mean values and variances to unconditional distributions, do some of the familiar concepts devised for the first two moments continue to be helpful in the more general area? Most seem to generalize fairly easy, such as the concepts of breaks, seasonality, trends and regime switching. Forecasting is more difficult, as forecasts become distributions, as do forecast errors. Persistence can be defined and also common factors by using the idea of a copula. Aggregation is more difficult but causality and controllability can be defined. The study of the time series of quantiles becomes more relevant.  相似文献   
88.
Two of the main forces driving European emigration in the late nineteenth century were real wage gaps between sending and receiving regions and demographic booms in the low‐wage sending regions. Our new estimates of net migration for the countries of sub‐Saharan Africa show that exactly the same forces driving African across‐border migration are at work today. The results suggest that rapid growth in the cohort of potential young emigrants, population pressure on the resource base, and slow economic growth are likely to intensify the pressure for migration out of Africa and into high‐wage OECD countries over the next two decades.  相似文献   
89.
90.
We examine voting by a board designed to mitigate conflicts of interest between privately informed insiders and owners. Our model demonstrates that, as argued by researchers and the business press, boards with a majority of trustworthy but uninformed “watchdogs” can implement institutionally preferred policies. Our laboratory experiments strongly support this conclusion. Our model also highlights the necessity of penalties on insiders when there is dissension among board members. However, penalties for dissent appeared to have little impact on the experimental outcomes.  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