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   12526篇
  免费   217篇
财政金融   2242篇
工业经济   898篇
计划管理   2069篇
经济学   2645篇
综合类   94篇
运输经济   78篇
旅游经济   167篇
贸易经济   1915篇
农业经济   707篇
经济概况   1886篇
信息产业经济   1篇
邮电经济   41篇
  2020年   114篇
  2019年   176篇
  2018年   268篇
  2017年   245篇
  2016年   246篇
  2015年   154篇
  2014年   264篇
  2013年   1078篇
  2012年   354篇
  2011年   355篇
  2010年   292篇
  2009年   350篇
  2008年   341篇
  2007年   299篇
  2006年   285篇
  2005年   246篇
  2004年   248篇
  2003年   242篇
  2002年   251篇
  2001年   223篇
  2000年   256篇
  1999年   221篇
  1998年   207篇
  1997年   189篇
  1996年   204篇
  1995年   184篇
  1994年   197篇
  1993年   191篇
  1992年   210篇
  1991年   208篇
  1990年   211篇
  1989年   180篇
  1988年   143篇
  1987年   153篇
  1986年   171篇
  1985年   248篇
  1984年   226篇
  1983年   196篇
  1982年   201篇
  1981年   199篇
  1980年   190篇
  1979年   190篇
  1978年   167篇
  1977年   153篇
  1976年   150篇
  1975年   150篇
  1974年   116篇
  1973年   114篇
  1972年   106篇
  1971年   83篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
The degree of spatial market integration in European Community agricultural product markets is investigated. The methodology is based on co-integration analysis. A two-step testing procedure is applied to test the existence of the ‘Law of One Price’ which should be in force if these markets are truly integrated. The results show that market integration has not been achieved in a number of cases even when MCAs are subtracted from the price series used.  相似文献   
82.
83.
Trends in agricultural trade for South and Central America are documented and the reform process is discussed. Performance of the agricultural sector of the region is evaluated. Challenges for policy makers are reviewed, ranging from macroeconomic policy to science and technology.  相似文献   
84.
85.
Structural changes in U.S. agriculture, influenced by technological and institutional forces, have altered the economic and social characteristics of rural America, especially that segment of rural America populated by farmers and their families. Changes in the structure of agriculture have greater implications for small scale farmers, many of whom are African American, in that strategic options for their farm-firms are constrained to: increasing their farm size, exiting farming, and obtaining off-farm employment to survive. This article presents a rationale for public support of limited resource farmers, identifies structural trends in U.S. agriculture and their impacts on African American farmers, discusses economic problems unique to these farmers, and recommends needs for specific public policies and development programs.  相似文献   
86.
D. A. G. Draper 《De Economist》1994,142(2):171-192
Summary The voluntary saving rate has declined in The Netherlands over the last thirty years. In this paper the increasing share of transfer income in total income, with a high propensity to consume, and the increase in collective pension schemes are simultaneously used to explain this development. Furthermore, the influence of taxes is modelled. The planning horizon of the representative consumer is treated as a parameter to be estimated. The planning horizon obtained (about 4.5 years) appears to be short compared to expected residual lifetime, implying rather small interest elasticities. The estimation results indicate that, in case the obligatory pension schemes are diminished, the representative consumer offsets the loss in pension benefits for 75 per cent by voluntary, additional accumulation of nonhuman wealth in the long run. The working of the model is illustrated by simulation experiments.I wish to thank two anonymous referees, Prof. J. Pen, G.M.M. Gelauff, J.J. Graafland, W. Vossers and other colleagues of the CPB for their helpful comments.  相似文献   
87.
88.
The objective of providing inducements for public utilities to seek to improve the efficiency of their operations has been a longstanding regulatory concern. Among the evolving strategies for furthering that objective is a shift toward what has come to be referred to as incentive regulation. We examine here how this departure from past regulatory practice will affect the market value and market risk of the utility firm, and the specific manner in which an incentive mechanism can be implemented in order to achieve a desired valuation outcome. A particular focus is the establishment of boundaries on allowed rates of return under incentive regulation which are consistent with that desired outcome. The likely impact on utility ratepayers is considered.  相似文献   
89.
The main ideas and concepts of Economics of Shortage (by János Kornai) and Non-Price Control (edited by János Kornai and Béla Martos) are summarized. Then the notion of a normal state, and the significance of quantity signals in economic control processes are discussed, along with Kornai's views about the role of prices in economic adjustment, and the nature of the budget constraints that agents face. Finally, the paper explores the relationship between Kornai's analysis and the various types of macroeconomic equilibrium recently discussed by Malinvaud.  相似文献   
90.
This study examines the effect of the Affordable Care Act's Medicaid expansion on hospital financial outcomes. A key innovation relative to prior studies is that we explicitly account for heterogeneity across states in the timing and extent of the expansion as well as across hospital types. We find that Medicaid expansion led to a decrease in uncompensated care expenditures and an increase in average operating margins. The effects were larger in states where the Medicaid expansion led to a greater increase in program eligibility. Operating margins improved most for public hospitals and facilities located in rural areas. (JEL I11, I13, I18)  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