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   2028篇
  免费   70篇
财政金融   420篇
工业经济   138篇
计划管理   341篇
经济学   479篇
综合类   15篇
运输经济   27篇
旅游经济   37篇
贸易经济   310篇
农业经济   168篇
经济概况   162篇
邮电经济   1篇
  2023年   16篇
  2022年   9篇
  2020年   32篇
  2019年   39篇
  2018年   51篇
  2017年   39篇
  2016年   47篇
  2015年   31篇
  2014年   49篇
  2013年   241篇
  2012年   49篇
  2011年   45篇
  2010年   63篇
  2009年   66篇
  2008年   55篇
  2007年   66篇
  2006年   78篇
  2005年   74篇
  2004年   48篇
  2003年   66篇
  2002年   44篇
  2001年   54篇
  2000年   51篇
  1999年   59篇
  1998年   53篇
  1997年   40篇
  1996年   33篇
  1995年   26篇
  1994年   40篇
  1993年   31篇
  1992年   47篇
  1991年   27篇
  1990年   18篇
  1989年   22篇
  1988年   19篇
  1987年   24篇
  1986年   26篇
  1985年   37篇
  1984年   29篇
  1983年   24篇
  1982年   30篇
  1981年   27篇
  1980年   26篇
  1979年   20篇
  1978年   19篇
  1977年   14篇
  1976年   10篇
  1975年   16篇
  1974年   11篇
  1973年   11篇
排序方式: 共有2098条查询结果,搜索用时 765 毫秒
61.
Agricultural Extension: Good Intentions and Hard Realities   总被引:3,自引:0,他引:3  
What considerations lead policymakers to invest in agriculturalextension as a key public responsibility, and what factors andagency incentives explain differences in extension system performance?To help answer these questions, this article provides a frameworkoutlining farmers' demand for information, the public goodscharacter of extension services, and the organizational andpolitical attributes affecting the performance of extensionsystems. This conceptual framework is used to analyze severalextension modalities and their likely and actual effectiveness.The analysis highlights the efficiency gains that can come fromlocally decentralized delivery systems with incentive structuresbased on largely private provision, although in most poorercountries extension services will remain publicly funded.   相似文献   
62.
This paper critically evaluates Transnational Corporations’ (TNCs) claimed adherence to the Global Reporting Initiative (GRI)’s ‘labour’ and ‘human rights’ reporting guidelines and examines how successful the GRI has been in enhancing comparability and transparency. We found limited evidence of TNCs discharging their accountability to their workforce and, rather, we found evidence to suggest that disclosure was motivated more by enhancing their legitimacy. TNCs failed to adhere to the guidelines, which meant that material information items were often missing, rendering comparability of information meaningless. Instead, TNCs reported large volumes of generic/anecdotal information without acknowledging the impediments they faced in practice.  相似文献   
63.
This paper proposes two new weighting schemes that average forecasts based on different estimation windows in order to account for possible structural change. The first scheme weights the forecasts according to the values of reversed ordered CUSUM (ROC) test statistics, while the second weighting method simply assigns heavier weights to forecasts that use more recent information. Simulation results show that, when structural breaks are present, forecasts based on the first weighting scheme outperform those based on a procedure that simply uses ROC tests to choose and forecast from a single post-break estimation window. Combination forecasts based on our second weighting scheme outperform equally weighted combination forecasts. An empirical application based on a NAIRU Phillips curve model for the G7 countries illustrates these findings, and also shows that combination forecasts can outperform the random walk forecasting model.  相似文献   
64.
We use expert clinical and public health opinion to estimate likely changes in the prevention and treatment of important disease conditions and how they will affect future life expectancy. Focus groups were held including clinical and public health faculty with expertise in the six leading causes of death in the United States. Mortality rates and life tables for 2040 were derived by sex and age. Life expectancy at age 20 and 65 was compared to figures published by the Social Security Administration and to estimates from the Lee-Carter method. There was agreement among all three approaches that life expectancy at age 20 will increase by approximately one year per decade for females and males between now and 2040. According to the clinical experts, 70% of the improvement in life expectancy will occur in cardiovascular disease and cancer, while in the last 30 years most of the improvement has occurred in cardiovascular disease. Expert opinion suggests that most of the increase in life expectancy will be attributable to the already achieved reduction in smoking rates, especially for women.  相似文献   
65.
This paper studies the puzzling negative book equity phenomenon among US public firms. Our evidence suggests that negative book equity firms exhibit heterogeneous characteristics. We show that a great portion of these firms, while operating at excessive capital structure with leverage ratio over 100%, are financially and operationally healthy. These healthy negative book equity firms increase their debt primarily motived by a need for funds to fulfill investment demand. We also find that the off‐balance sheet intangible assets and quality of intangible assets play an important role in determining the true debt capacity of these firms.  相似文献   
66.
67.
Since all macroeconomic policies are enacted within a certain set of distributive relations and institutional structures, the employment intensity of growth is likely to vary for men and women depending on the nature and context of output growth. I examine the gendered nature of this growth-employment nexus by analyzing the differential impacts that macroeconomic policies and structures have on growth’s employment intensity by gender for eighty countries in the period from 1990 to 2012. Such an understanding is of particular relevance to policymakers concerned with the linkages between growth and human development, as the question of whether the benefits of economic growth are broadly shared is one that centers on the capacity of economies to generate high-quality employment. Although education levels and non-agricultural sectors are associated with more employment intensive growth for men and women, policies supporting reductions in non-wage care work, prioritizing public expenditures on education, and promoting secondary school enrollment for girls are especially linked with growth that is more employment intensive for women. The results I obtain here illuminate broad trends through a very wide lens and should be applied in conjunction with more intimate knowledge of how cultural, technological, legal, political, and economic activities uniquely affect one another in particular countries.  相似文献   
68.
69.
70.
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