全文获取类型
收费全文 | 4597篇 |
免费 | 349篇 |
国内免费 | 16篇 |
专业分类
财政金融 | 75篇 |
工业经济 | 267篇 |
计划管理 | 1586篇 |
经济学 | 668篇 |
综合类 | 268篇 |
运输经济 | 7篇 |
旅游经济 | 32篇 |
贸易经济 | 206篇 |
农业经济 | 1449篇 |
经济概况 | 404篇 |
出版年
2024年 | 21篇 |
2023年 | 73篇 |
2022年 | 142篇 |
2021年 | 108篇 |
2020年 | 123篇 |
2019年 | 118篇 |
2018年 | 127篇 |
2017年 | 124篇 |
2016年 | 163篇 |
2015年 | 229篇 |
2014年 | 360篇 |
2013年 | 284篇 |
2012年 | 447篇 |
2011年 | 551篇 |
2010年 | 490篇 |
2009年 | 260篇 |
2008年 | 229篇 |
2007年 | 242篇 |
2006年 | 266篇 |
2005年 | 200篇 |
2004年 | 103篇 |
2003年 | 81篇 |
2002年 | 52篇 |
2001年 | 58篇 |
2000年 | 32篇 |
1999年 | 17篇 |
1998年 | 8篇 |
1997年 | 11篇 |
1996年 | 10篇 |
1995年 | 9篇 |
1994年 | 2篇 |
1993年 | 8篇 |
1992年 | 6篇 |
1991年 | 1篇 |
1990年 | 2篇 |
1985年 | 2篇 |
1984年 | 3篇 |
排序方式: 共有4962条查询结果,搜索用时 250 毫秒
11.
对浙北地区县域范围内城乡供水现状进行了分析,指出:要实现自来水供应一体化,面临着行政管理体制和水务运作体制方面的问题,并对解决这两方面的问题提出了对策。 相似文献
12.
Yoko Moriizumi 《Journal of urban economics》2003,53(3):494-509
This paper examines the extent to which wealth accumulation for housing purchase increases household savings and suppresses consumption. The study employs an estimation method based on simultaneous equations with limited dependent variables developed by Nelson and Olson to examine the relationship between wealth accumulation and housing purchase plans, using data relating to young Japanese renters. The estimation results provide evidence that young Japanese households severely reduce their consumption by around 30–40 percent. 相似文献
13.
环保型水性上光油的研制与应用 总被引:1,自引:0,他引:1
目前,涂布上光技术已被越来越多的印刷厂家所采用,促使上光油的需求量不断上升。经过近几年的努力,我院研制的环保型水性上光油已取得了突破性的进展,完全能够替代溶剂型水性上光油和油性上光油,由于水性上光油具有无毒、无味、透明感强、无有机挥发物(VOC)的排放,成本低、原材料来源广等特点,在使用中能赋予印刷良好的光泽性、耐折性、耐磨性和化学品性,尤其是它所具有的环保性能特别适合食品、药品和烟草等行业包装印刷材料的加工。 相似文献
14.
Ziv Bar-Shira Israel Finkelshtain Avi Simhon 《American journal of agricultural economics》2006,88(4):986-999
In this article we adapt Burtless and Hausman's (1978) methodology in order to estimate farmers' demand for irrigation water under increasing block-rate tariffs and empirically assess its effect on aggregate demand and inter-farm allocation efficiency. This methodology overcomes the technical challenges raised by increasing block-rate pricing and accounts for both observed and unobserved technological heterogeneity among farmers. Employing micro panel data documenting irrigation levels and prices in 185 Israeli agricultural communities in the period 1992–1997, we estimate water demand elasticity at −0.3 in the short run (the effect of a price change on demand within a year of implementation) and −0.46 in the long run. We also find that, in accordance with common belief, switching from a single to a block-price regime, yields a 7% reduction in average water use while maintaining the same average price. However, based on our simulations we estimate that the switch to block prices will result in a loss of approximately 1% of agricultural output due to inter-farm allocation inefficiencies. 相似文献
15.
文章分析了当前土工实验中的液、塑限测定过程中应当注意的问题及其存在的问题,并论述了如何对其实验数据进行处理和分析的方法。 相似文献
16.
Richard D. Horan James S. Shortle David G. Abler 《Environmental and Resource Economics》2002,21(2):189-202
We consider the design of ambient taxes forrisk-neutral and risk-averse polluters whenpolluters and the regulatory agency haveasymmetric information about environmentalrelationships and probabilities associatedwith random events. Unlike prior work, we showthat under these conditions, optimal ambienttaxes must be firm-specific, and accompaniedby additional incentives to influencepolluters' choices of abatement techniques. 相似文献
17.
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
18.
James A. Brox Ramesh C. Kumar Kenneth R. Stollery 《American journal of agricultural economics》2003,85(2):414-428
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
19.
20.