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   24945篇
  免费   565篇
  国内免费   25篇
财政金融   4223篇
工业经济   1775篇
计划管理   4460篇
经济学   5792篇
综合类   447篇
运输经济   203篇
旅游经济   382篇
贸易经济   4112篇
农业经济   1245篇
经济概况   2816篇
信息产业经济   4篇
邮电经济   76篇
  2023年   127篇
  2021年   233篇
  2020年   344篇
  2019年   493篇
  2018年   538篇
  2017年   567篇
  2016年   558篇
  2015年   428篇
  2014年   669篇
  2013年   2540篇
  2012年   951篇
  2011年   1018篇
  2010年   886篇
  2009年   966篇
  2008年   913篇
  2007年   785篇
  2006年   741篇
  2005年   634篇
  2004年   515篇
  2003年   497篇
  2002年   446篇
  2001年   534篇
  2000年   476篇
  1999年   427篇
  1998年   481篇
  1997年   427篇
  1996年   427篇
  1995年   363篇
  1994年   376篇
  1993年   358篇
  1992年   364篇
  1991年   381篇
  1990年   347篇
  1989年   255篇
  1988年   263篇
  1987年   269篇
  1986年   250篇
  1985年   362篇
  1984年   365篇
  1983年   332篇
  1982年   286篇
  1981年   287篇
  1980年   283篇
  1979年   277篇
  1978年   225篇
  1977年   183篇
  1976年   182篇
  1975年   162篇
  1974年   150篇
  1973年   148篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
141.
Successful policy planning depends to a large extent on being able to predict the consequences of alternative measures. In the case of agriculture, it is important to know how the future pattern of supply and demand in this sector will be affected by government action on specific issues such as farm price support, and by expected trends in macro-economic variables such as national incomes and population. This paper illustrates the application of a model of U.K. agriculture to the projection of changes in the production and consumption of food and agriculture products between now and 1975. The demand projections show the effect of important levies, and of joining the E.E.C, on future expenditure on food, while the supply projections show how the output of a number of agricultural commodities will be affected by adjusting farm prices towards E.E.C. levels.  相似文献   
142.
The concern of the paper is public river basin development in Western Canada. It attempts to set forth public decision guides and objectives in development of water resource policy. Operational formulations that are useful in public natural resource development and management are considered. Cet article traîte du développement des bassins fluviaux publiques au Canada Ouest. Les auteurs tâchenl de formuler les indications ?opinion publique el les objectifs qui peuvent servir de guides pour arriver à une politique pour le développement des ressources ?eau. Les formulations opérationnelles qui sont utiles dans le développemenl et le ménagement des ressources nalurelles publiques sont aussi considérées.  相似文献   
143.
144.
145.
High transaction costs are detrimental to the efficient operation or existence of markets for inputs and outputs. The cost of information and the costs associated with the search for trade partners, the distance to formal markets and contract enforcement are likely to influence the marketing of food crops. This study hypothesises that the level of income generated from food-crop sales by small-scale farmers in the Impendle and Swayimana districts of KwaZuluNatal is influenced by transaction costs and certain household and farm characteristics. Regression analysis shows that the depth of marketing methods is significantly influenced by transaction cost proxies, such as cooperation with large commercial farmers and ownership of means of transport. Results from a block-recursive regression analysis show that the level of crop income generated is determined by the depth of marketing methods, the size of allocated arable land and off-farm income. Households with lower transaction costs, sizeable allocated land and off-farm income can be expected to generate higher income from food crops. Investment in public goods such as roads, telecommunications and an efficient legal system (to uphold commercial contracts), as well as farmer support services (input supply, extension, marketing information and research), would probably raise farm and non-farm income by reducing transaction costs. This would increase the effective demand for locally produced goods and services, thus contributing to rural employment and livelihoods within rural communal areas.  相似文献   
146.
We revisit a significant research topic on exchange rate behavior by restating the test procedures with an appropriate econometric methodology to re-examine three aspects. (i) Does the inflation (price) factor affect nominal exchange rate? (ii) Do relative interest rates affect a country’s exchange rate? (iii) Do the price and interest rate effects hold if controls for non-parity factors are embedded in tests? The quarterly data series for this study are taken over 55 years. The traditional parity condition model with price and interest rate as criterion variables is extended to take into account recently-verified non-parity factors, namely trade, productivity and foreign reserves. The results affirm that both parity factors and also the non-parity factors significantly affect the exchange rates of Canada, Japan, the United Kingdom and the United States. In our view, these findings relating to four free-floating currencies help extend our knowledge on how currency behavior is consistent with parity and non-parity theorems using a relevant methodological approach in this study.  相似文献   
147.
148.
This paper presents a preliminary analysis of third party complaint handling mechanisms, based on data obtained from the Hawaii Office of Consumer Protection. Specifically, the study focuses on the types of complaints processed by the Agency, the factors which affect the redress received by consumers and the length of investigation time.  相似文献   
149.
150.
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