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   18415篇
  免费   381篇
  国内免费   2篇
财政金融   3741篇
工业经济   1349篇
计划管理   3196篇
经济学   4117篇
综合类   241篇
运输经济   82篇
旅游经济   262篇
贸易经济   2808篇
农业经济   885篇
经济概况   2038篇
邮电经济   79篇
  2020年   215篇
  2019年   299篇
  2018年   328篇
  2017年   381篇
  2016年   357篇
  2015年   246篇
  2014年   378篇
  2013年   1755篇
  2012年   470篇
  2011年   505篇
  2010年   463篇
  2009年   521篇
  2008年   470篇
  2007年   474篇
  2006年   429篇
  2005年   401篇
  2004年   355篇
  2003年   398篇
  2002年   361篇
  2001年   357篇
  2000年   396篇
  1999年   328篇
  1998年   330篇
  1997年   345篇
  1996年   330篇
  1995年   312篇
  1994年   333篇
  1993年   317篇
  1992年   345篇
  1991年   362篇
  1990年   287篇
  1989年   236篇
  1988年   249篇
  1987年   242篇
  1986年   271篇
  1985年   366篇
  1984年   352篇
  1983年   311篇
  1982年   329篇
  1981年   346篇
  1980年   293篇
  1979年   294篇
  1978年   265篇
  1977年   200篇
  1976年   191篇
  1975年   199篇
  1974年   146篇
  1973年   174篇
  1972年   131篇
  1971年   114篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
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   
22.
Canada's wheat grading system is largely based on visual criteria and it is based on relatively high quality standards. A strict varieties licensing system exists to maintain the integrity of the grade standards. One of the consequences of the licensing system is that higher yielding, lower or different quality wheats have not been grown in Canada until recently. The basic objective of this paper is to examine some of the consequences of the regulatory strategy of limiting wheat production to the traditional high quality wheats. This question is analyzed in the context of important changes in the international grain markets. Using a partial equilibrium trade model this paper estimates that if higher yielding wheats were permitted to be grown, annual producer gains would be 5 to 17 percent of current net farm income.
Le classement des blés au Canada est basé sur des critères visuels qui sont de hautes qualités. Le système actuel d'homologation des variétés est tel que l'intégrité de ce système est maintenue. En conséquent, ce système n'a pas encouragé la cultivation des blés de hauts rendements ou des varietés différentes que tout récemment. L'objectif principal de cette étude est d'examiner quelques unes des conséquences de la stratégic de la réglementation visant à limiter la production du blé aux variétés de hautes qualités. Cette question est adressée dans le contexte des changements importants qui ont eu lieu dans le marché international des grains. A l'aide d'un modèle d'équilibre partiel des échanges, la présente étude démontre gu'en permettant la production des blés de hauts rendements, le gain annuel aux producteurs serait de 5 à 17 pourcent du revenue agricole net.  相似文献   
23.
24.
25.
The Amazon is the largest tropical forest area on Earth, and has been undergoing rapid deforestation for the last four decades. In the Brazilian Amazon, large‐scale pasture for cattle ranching and soybean production are the main land uses, leading to a yearly deforestation rate of 0.5%. These conversions are mostly located in frontier areas distributed along the so‐called “arc of deforestation”. Within this large zone, various land use change processes are interacting through several modes of land valuation and organisation. From several case studies in the State of Pará (Brazil), the current project aims at analysing how landscape dynamics are related to infrastructure development, ecological conditions, zoning policies and to the evolution and the organisation of the production, consumption and marketing chains of livestock products. This paper presents the results for one test site, the region of São Félix do Xingú, South of Pará This region is the focus of land speculation, cattle expansion, and deforestation. Road construction, investments in electrical energy, financial credit for cattle, and the land reform policies have all fuelled this process. All these factors make this region one of the most dynamic agricultural frontiers in the Brazilian Amazon. The main objective of the paper is to improve our understanding of deforestation processes by crossing spatial analyses and 1ivestock economics.studies, and to characterise the role and impact of various natural and anthropic factors in the location and development of the main types of farmers, and their policy implications.  相似文献   
26.
In January 1992, Kazakhstan initiated a reform programme to move towards market-determined prices. The price liberalization process was characterized by large relative price shifts and an increase in the overall price level towards those observed in market economies. The paper shows how the piecemeal manner in which prices were liberalized resulted in strong relative price variability over a prolonged period of time, against a background of high inflation. Convergence towards international relative and absolute price levels has progressed but is not complete, with prices for energy and services in particular still below market economy levels.  相似文献   
27.
Reporting Discretion and Private Information Communication through Earnings   总被引:1,自引:0,他引:1  
We model a two-period pure exchange economy where a risk averse manager, who has private information regarding future earnings, is required to issue an earnings report to investors at the end of each period. While the manager is prohibited from directly disclosing her private information, she is allowed to bias reported earnings in the first period, subject to GAAP rules that require that a specified proportion of the bias be reversed subsequently. We show there is a minimum threshold of reversal, such that, when the proportion of required reversal is above this threshold, the manager smooths income and communicates her private information through reported earnings. Consequently, the market attaches greater weight to reported earnings than under a regime that allows no discretion. When the required reversal is below the minimum threshold, the manager increases reported earnings without limit and the equilibrium degenerates. When the manager is not endowed with any private information, the market unravels the "true" earnings and price is unaffected by earnings management. Our results underscore the importance of both allowing and restricting reporting discretion through formal mechanisms.  相似文献   
28.
This article reports on the latest in a series of international comparisons of management practices and performance outcomes of industries in various countries. Here, it is the service industries in the UK and the US which come under the microscope. Among the companies surveyed, there were more world-class performers in the US than the UK, but also more low performers. The concluding part of the article is diagnostic – the authors also suggest measures which could improve performance.  相似文献   
29.
Previous studies document a significant positive price reaction at the proposal of a buyout offer. In this study the author examines the influence of investment banking relationships on target firms associated with buyout offers. The results support the hypothesis that knowledge of an impending buyout manifests itself before a buyout’s public announcement. The evidence supports the hypothesis that investment bankers use different strategies before a buyout.  相似文献   
30.
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