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   23261篇
  免费   4476篇
  国内免费   94篇
财政金融   2184篇
工业经济   2490篇
计划管理   3834篇
经济学   5476篇
综合类   1715篇
运输经济   209篇
旅游经济   126篇
贸易经济   4603篇
农业经济   3267篇
经济概况   3876篇
信息产业经济   18篇
邮电经济   33篇
  2024年   176篇
  2023年   489篇
  2022年   511篇
  2021年   632篇
  2020年   831篇
  2019年   1159篇
  2018年   937篇
  2017年   1090篇
  2016年   917篇
  2015年   1010篇
  2014年   1221篇
  2013年   1649篇
  2012年   2157篇
  2011年   2146篇
  2010年   1905篇
  2009年   1604篇
  2008年   1513篇
  2007年   1543篇
  2006年   1599篇
  2005年   1477篇
  2004年   675篇
  2003年   510篇
  2002年   414篇
  2001年   366篇
  2000年   205篇
  1999年   136篇
  1998年   113篇
  1997年   100篇
  1996年   75篇
  1995年   51篇
  1994年   50篇
  1993年   69篇
  1992年   74篇
  1991年   97篇
  1990年   38篇
  1989年   35篇
  1988年   22篇
  1987年   13篇
  1986年   9篇
  1985年   18篇
  1984年   17篇
  1983年   19篇
  1982年   24篇
  1981年   12篇
  1979年   15篇
  1978年   10篇
  1973年   9篇
  1971年   10篇
  1969年   9篇
  1963年   9篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
101.
Since the initial studies of derecognition, many articles have focused on the issue, by and large pointing to a slow increase in derecognition. However, a small number have indicated it is actually much larger. This paper shows that derecognition is even greater than these suggest and that its nature has changed. The paper looks at the contexts of this rise but argues that derecognition should not yet be seen as a major problem facing the unions.  相似文献   
102.
世界经济中的种种迹象表明,国际战略联合这一国际化经营的新方式正日益显示出其重要性,并终将成为拓展国际化经营活动的主要方式。作为国际化经营活动主角的跨国公司。  相似文献   
103.
全要素生产率是理解经济增长的方式和结构的重要指标之一,中国的工业改革正好为经济学家关注和考察不同所有制的企业形式以及改革政策对生产率变动的不同影响提供了丰富的经验基础。在1978年开始的旨在向市场经济转型的中国经济体制改革正在彻底地改变着它的工业部门面临的市场结构和工业组织,并不断造就着一个与世界经济更加融合的制造业部门。新的和更有竞争力的工业部门在竞争中不断获得了高速增长和扩张的机会,使得中国工业部门的生产率改善主要依赖着非国有企业的成长和它的活力。中国工业改革的成就不是挽救了国有企业,而是收缩了国有企业部门的"战线",诱致了一个非国有的新兴工业部门的崛起。  相似文献   
104.
本文分析了入世后,上海企业家在做大商业品牌中,应正确处理好的六个关系,以及有关的述评。  相似文献   
105.
Policy discussions on agricultural pollution problems characterize prevention as more cost effective and precautionary than ex post treatment. We derive conditions under which treatment alone is more cost effective in situations involving multiple sources of emissions, multiple sites affected, and a commonly used precautionary approach to uncertainty. We also show that a greater degree of precaution can result in less reliance on prevention. An empirical case study indicates that treatment alone is the most cost-effective means of dealing with nitrate in most Maryland community water system wells. The use of leaching prevention measures is restricted to the most intensive poultry producing areas. The incremental cost of precaution is substantial.  相似文献   
106.
Modeling Conditional Yield Densities   总被引:2,自引:0,他引:2  
Given the increasing interest in agricultural risk, many have sought improved methods to characterize conditional crop-yield densities. While most have postulated the Beta as a flexible alternative to the Normal, others have chosen nonparametric methods. Unfortunately, yield data tends not to be sufficiently abundant to invalidate many reasonable parametric models. This is problematic because conclusions from economic analyses, which require estimated conditional yield densities, tend not to be invariant to the modeling assumption. We propose a semiparametric estimator that, because of its theoretical properties and our simulation results, enables one to empirically proceed with a higher degree of confidence.  相似文献   
107.
A model of farmer decision making is developed to determine the extent to which uncertainties about soil fertility and weather affect the value of site-specific technologies (SSTs) using jointly estimated risk and technology parameters. Uncertainty can lead risk-averse farmers to apply more fertilizers and generate more pollution than in the certainty case. Ignoring uncertainty and risk aversion would overestimate the economic and environmental benefits of SSTs and underestimate the subsidy required to induce adoption. Accounting for uncertainties and risk preferences might explain the low observed adoption rates of SSTs. Improving the accuracy of SSTs would increase the incentives for adoption.  相似文献   
108.
This article deals with the problem of item nonresponse in contingent valuation surveys using a payment-card method, by applying a grouped-data sample-selection estimation technique that is capable of imputing the missing values conditional upon a respondent's decision to answer a willingness-to-pay question. The advantage of the technique lies in its ability to utilize all of the information in the sample, permitting a more efficient estimation in the presence of item nonresponse bias. The major determinants of willingness to pay appear to be household income, number of children, education, perception of existing water quality, and identification with environmental issues.  相似文献   
109.
通过对《形状和位置公差》新、旧国际的对比,综述了新、旧标准间的不同之处、便于迅速了解和应用新标准。  相似文献   
110.
Summary Standard laboratory posted-offer markets respond slowly and incompletely to demand shocks. In these one-sided markets, where sellers control the setting of prices, very little information is transmitted via the process of exchange. For this reason, traders have trouble distinguishing randomness in their own experience from changes in market fundamentals. This paper reports the results of twelve laboratory markets conducted to assess whether some common variants to standard posted-offer rules can correct the adjustment deficiences. Although discounting, multiple postings and excess demand information all improve performance, we find that response remains poor, and efficiencies low.Support for this research was provided by the National Science Foundation (SBR 9319842 and SBR 9320044), and the University of Virginia Bankard Fund. Data are archived at FTP address: fido.econlab.arizona.edu. We wish to thank Charles Plott and Shyam Sunder for useful comments on an earlier draft of this paper. The usual disclaimer applies.  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