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   4806篇
  免费   232篇
  国内免费   47篇
财政金融   353篇
工业经济   225篇
计划管理   780篇
经济学   1149篇
综合类   474篇
运输经济   88篇
旅游经济   210篇
贸易经济   472篇
农业经济   860篇
经济概况   473篇
信息产业经济   1篇
  2024年   8篇
  2023年   96篇
  2022年   60篇
  2021年   114篇
  2020年   218篇
  2019年   191篇
  2018年   169篇
  2017年   208篇
  2016年   205篇
  2015年   166篇
  2014年   297篇
  2013年   520篇
  2012年   313篇
  2011年   399篇
  2010年   304篇
  2009年   280篇
  2008年   272篇
  2007年   234篇
  2006年   236篇
  2005年   147篇
  2004年   118篇
  2003年   95篇
  2002年   84篇
  2001年   84篇
  2000年   42篇
  1999年   35篇
  1998年   26篇
  1997年   36篇
  1996年   32篇
  1995年   21篇
  1994年   17篇
  1993年   8篇
  1992年   11篇
  1991年   5篇
  1990年   2篇
  1989年   2篇
  1986年   2篇
  1985年   7篇
  1984年   9篇
  1983年   8篇
  1982年   1篇
  1981年   1篇
  1979年   1篇
  1978年   1篇
排序方式: 共有5085条查询结果,搜索用时 250 毫秒
51.
China has been conducting massive land consolidation (LC) projects since the late 1990s to ensure national food security which has been one of the common issues in the world. How the implementation of LC projects affects grain production stability is a question should be answered. Basing on an empirical analysis at the county level in Hubei Province, China, this paper separates the trend component and the fluctuation component from a time series of grain production over 1991-2016 using the H-P filtering method. Then we estimate the impacts of LC projects and climate change on the trend and fluctuation rate of grain production for the entire Hubei Province. Moreover, the effects on the production of different major crops for the central, eastern, southwestern, northwestern and northern areas are also examined, respectively. The results show that: (1) the production trends for five subareas and the whole area all have followed a trajectory of “increase-decrease-increase” from 1991 to 2016. The magnitude of fluctuation rate was large but became smaller in recent years. (2) The contribution of LC to the long-term trends of grain production for the entire samples in Hubei Province mainly benefits from the growth in the cultivated land area through LC; more LC investment and newly-added arable land area promote the sudden increase in grain production above the long-term trends, while the impacts of LC area are negative. (3) The impacts of LC on the major crop production vary across areas. LC exerts significant impacts on the production of major crops in the central and eastern Hubei, and this effect persists to the following year. Similarly, this influence also exists in the southwestern and northern area, while becomes insignificant in the following year. No significant effect of LC variables is found in the northwestern area. These findings may provide reference for the government to address LC inefficiency and food security problems, and an effective and innovative mechanism combining the agricultural production, land consolidation and meteorological factors needs to be established to ensure food security and long-term and stable agricultural production. In addition, the regional difference in natural conditions and LC orientations should also be considered.  相似文献   
52.
During their occupation of Sri Lanka (1640–1796) and following Sinhalese and Portuguese practices, the Dutch created an elaborate registration of people, estates, and labour services. The administrative records known as the thombos are incomparable in their level of detail, yet they have hardly been used for the purposes of demographic or economic history. This article describes the challenges involved in ‘decoding’ the thombos, that is, reconstructing the meaning of particular variables in the light of the prevailing legal pluralism in which Sinhalese common law and Roman-Dutch law co-existed uncomfortably. It also summarises research findings from a pilot study involving about two hundred small villages in Colombo province. Finally, it sketches research horizons, as the thombo ‘treasure’ holds great prospects for (comparative) studies into family systems and the impact of colonial rule on fertility and mortality.  相似文献   
53.
This study presents detailed evidence on the characteristics, processes, and consequences of land rental practices in a multi-ethnic rural society in Yunnan Province, Southwest China, which have rarely been explored. It contributes to the existing literature on land rental and control by considering the dimension of ethnicity. The findings show the following: Interethnic land rental is a very common and noteworthy feature in the selected Han-Jingpo multi-ethnic rural society. Han ethnic households rented and accumulated a large proportion of farmland and forestland from neighbouring Jingpo ethnic households. This was done to expand cash crops and timber forest, as opposed to the activities of Jingpo ethnic households. Interethnic land rental was mainly triggered by different development capabilities and attitudes towards agricultural commercialization supported by differences in resource assets due to ethnic living patterns and other dynamic socio-political reasons. Consequently, Jingpo ethnic households are experiencing an increasing income gap due largely to declines in farmland and forestland, while possibilities for positive interethnic interactions were found. These findings are relevant for rethinking land rental policies in China and also provide useful insights for rural sustainability in any multi-ethnic area where interethnic interactions of land or other resources coexist.  相似文献   
54.
基于SFA模型的河南省粮食产量时空变化及投入要素影响   总被引:1,自引:0,他引:1  
[目的]粮食问题影响着一个国家的国民经济发展和人民生产、生活,农业在整个社会生产活动中占有重要地位,河南省是全国农业大省,对河南省粮食产量进行分析具有重要的现实意义。[方法]以2005—2015年河南省各县粮食产量和投入要素为研究对象,将研究数据面板化,利用线性相关、随机前沿生产函数模型、脱钩分析等方法,运用ArcGIS 10.1、Eviews 8.0和SPSS 19.0等软件,对河南省各县粮食产量时空变化、投入要素影响程度和脱钩效应进行分析。[结果]模型运算结果表明文章选用模型效果较好,能够反映粮食产量的时空变化以及其与投入要素之间的关系,且符合河南省粮食产量实际情况。研究结果表明:(1)从时间上来看, 2005—2015年河南省粮食产量总体呈线性上升趋势;(2)从空间上来看,河南省中部、北部、东部和南部粮食产量较高,西部受地势因素影响粮食产量较低;(3)粮食产量与化肥施用折纯量、粮食播种面积、农民经营性收入、农药施用量、农业机械总动力和乡村农业人口呈正相关关系,与农村用电量呈负相关关系;(4)化肥施用折纯量、农村用电量、农药施用量存在脱钩效应,粮食播种面积、农民经营性收入、农业机械总动力不存在脱钩效应。[结论]应保持目前粮食播种面积不变,提高农业机械总动力,突出投入要素的影响,同时对河南省各县进行区域功能定位。  相似文献   
55.
Forest ecosystems deliver valuable services to humanity. However, many forests are being degraded and their services have been undervalued. The main problem lies in the inadequate institutional arrangements for forest governance. This paper aims to assess the effects of alternative forest governance arrangements on the provision and economic values of forest ecosystem services (FES) in Vietnam. The study presents a framework for mapping land use and land cover (LULC) change stemming from actual and hypothetical changes in forest governance regimes, quantifies the resulting changes in the provision of FES, and estimates the associated economic values. In the context of the study site in the North Western uplands of Vietnam, we test three alternative forest governance scenarios: business as usual, with a dominant government role; a community-based governance regime; and a private, individual-based forestry governance regime. Scenarios are based quite closely on the way these regimes are (or might be expected to be) implemented in Vietnam. For each forest governance scenario, we map LULC changes based on land suitability analysis and transition likelihood for the period 2010 − 2020. The resulting maps are used as inputs into the InVEST (Integrated Valuation of Environmental Services and Tradeoffs) model, which is used to estimate the quantity of three specific FES: carbon storage/sequestration, sediment yield, and water yield. We apply economic valuation methods to value these services: the social cost of carbon is used to estimate the economic values of carbon storage/sequestration; the cost of removing sediment deposited in reservoirs is applied for valuing the reduction of sediment yield, and the residual value of water supply for hydropower generation is used for valuing water yield. The results show that forest governance regimes have a significant effect not only on forest LULC, but also on the quantity and values of FES derived from forests. The FES are differentially affected by alternative forest governance regimes: some FES increase in quantity and value under some governance regimes and decrease under others. Of the three forest governance regimes examined, there is no one regime that will always be ‘better’ than the others in terms of provisioning all considered FES. For the specific context of Vietnam, we find that the private forest governance scenario is inferior to the community-based governance scenario, as an alternative to the current state-based governance. Because our results pertain to the scenarios as constructed, rather than generally to broad categories of governance regimes, there remains the possibility that regimes can be constructed that outperform all of those examined here.  相似文献   
56.
论文重点分析了企业组织架构变革的动因和变革过程中应该注意的问题,在对案例进行系统剖析研究的基础上,对组织架构变革如何适应并推动公司可持续发展、变革的主要动力、变革的主要策略等方面进行了系统研究,并以此为基础,提出了企业组织架构变革的相关建议。  相似文献   
57.
[目的]改革开放40多年来,我国畜牧产业结构不断调整和优化,其生产供给结构与消费需求结构的变动与我国粮食安全问题息息相关。[方法]文章基于改革开放40多年来畜牧产业发展历程,从供给与需求两个维度分析我国畜牧产业结构变动的特征,并进一步探究畜牧产业结构变动与我国粮食安全间的作用机理,最后运用灰色关联度分析法实证其关联影响度。[结果]我国畜牧产业结构由耗粮型为主向节粮型转变,畜产品供给结构趋于合理,但不同区域间存在较大差异; 我国居民对畜产品消费需求量增加,但城乡居民畜产品消费结构及变动存在一定差异性; 畜牧产业结构变动与粮食安全有重要联系,畜牧业发展同保障国家粮食安全并不矛盾,畜牧产业结构变动主要通过耕地、基于口粮替代的食物需求结构变化及饲料粮需求3个方面作用于粮食安全; 具体来看,粮食播种面积、耗粮型畜产品比重和耗粮型畜产品饲料转化率对粮食安全水平的关联影响较大,节粮型畜产品比重与节粮型畜产品饲料转化率对粮食安全水平的关联影响小于耗粮型畜产品的影响。[结论]不断提高不同畜产品的饲料转化率,加大非粮型饲料资源开发利用度,推广非粮饲料应用技术,加快畜牧产业转型升级,满足消费者需求和保障国家粮食安全。  相似文献   
58.
Abstract:

This article clarifies the significance of “collective democracy” in the works of John R. Commons by comparing it with “judicial sovereignty” in terms of its contribution to “progress.” We can thus answer two issues that Paul D. Bush does not clearly address: (i) what setup for policy formation contributes to progress and (ii) what is the role of economists within a collective democracy? Based on the comparison, the answer to the first question is collective democracy, and regarding the second question, the roles of economists as both economists and “institutional” economists are extrapolated.  相似文献   
59.
Abstract:

Through a comprehensive review of the progressive institutional change (PIC) literature, I first discuss four possible trajectories of PIC by considering the forces of societal reaction that might frame the path, as well as the scale and scope of the changes. Thus, I pose four questions that need to be asked when related policies are formulated for PIC. To illustrate this method, I scrutinize the evidence from the construction of a socialist market economy by the Chinese government since the 1980s and argue that related policies have successfully promoted PIC from three dimensions: (1) curbing potential conflicts with power groups; (2) promoting a sense of awareness among stakeholders; and (3) minimizing disturbances to the community. Actually, the related changes demonstrate a dynamic “displacement process” for PICs. Despite the success of this sociosystem, it is found that the sustaining of PIC which requires policy factors that enhance instrumental efficiency in the Chinese context will serve as a challenge to the Chinese government ahead.  相似文献   
60.
Abstract:

This article argues that the issue of “technological unemployment” resulting from automation is the result of ceremonial encapsulation within the process of progressive institutional adjustment. While institutions of production have adjusted to account for new technological developments, institutions of distribution have not. As discussed here, the main cause of this lack of adjustment is a financialized economy, in which shareholder returns motivate and dominate economic decision making and activity. As a result, gains and benefits from technological advances exacerbate existing income inequality and reduces the power of labor. I discuss this issue in detail before explaining how progressive policies that divorce private wage-labor from access to the system of social provisioning may serve to smooth this process of institutional adjustment caused by the introduction of automated processes.  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