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   154篇
  免费   10篇
财政金融   27篇
工业经济   5篇
计划管理   27篇
经济学   47篇
旅游经济   1篇
贸易经济   25篇
农业经济   16篇
经济概况   16篇
  2023年   3篇
  2022年   1篇
  2021年   8篇
  2020年   7篇
  2019年   7篇
  2018年   5篇
  2017年   9篇
  2016年   8篇
  2015年   3篇
  2014年   7篇
  2013年   16篇
  2012年   5篇
  2011年   15篇
  2010年   8篇
  2009年   4篇
  2008年   4篇
  2007年   6篇
  2006年   2篇
  2005年   1篇
  2004年   3篇
  2003年   4篇
  2002年   1篇
  2000年   3篇
  1999年   3篇
  1998年   2篇
  1997年   6篇
  1996年   3篇
  1995年   1篇
  1993年   1篇
  1992年   1篇
  1991年   2篇
  1989年   2篇
  1987年   2篇
  1986年   2篇
  1985年   2篇
  1984年   1篇
  1983年   2篇
  1982年   1篇
  1981年   1篇
  1979年   2篇
排序方式: 共有164条查询结果,搜索用时 632 毫秒
51.
Our aim is to report the findings of the initial three years of road traffic injuries (RTI) surveillance at Karachi and to compare it with previously published RTI-related data from Pakistan and other low-and middle-income countries. Data were collected through the RTI surveillance programme at Karachi (RTIRP) from the five biggest emergency departments of the city, which receive almost all the major emergencies of the city for the period September 2006 till September 2009. A total of 99,272 victims were enlisted by the RTIRP during the study period. Annual incidence of RTI is calculated to be 184.3 per 100,000 populations and mortality is 5.7 per 100,000 populations. Eighty nine per cent of victims are male and 73% are between 15 and 44 years of age. Commonest road user to be affected is riders of two wheelers (45%). Only 7% of affected motorcyclists were found to be wearing helmets at the time of the accident. Trends of injuries remained uniform over the years. Most frequent injuries were external wounds, followed by orthopaedic injuries. On the basis of our surveillance system, we have presented the largest RTI-related data from a metropolitan city of Pakistan to date.  相似文献   
52.
Industries can be classified into fixprice sectors according to their pricing behaviour. Although Hicks and Morishima have broadly classified manufacturing industries into fixprice and the rest of the economy into flexprice, using cost-based input-output models, the present paper reclassifies Malaysian agrobased manufacturing into flexprice and nonagrobased manufacturing into fixprice categories. By compiling annual sectoral price indices, both for intermediate and primary inputs, the model estimates sectoral residual profits of 1978 and 1983 vintage technologies.  相似文献   
53.
A fairly comprehensive range of planting choices made by maize farmers in Kenya (including discrete endogenous variables creating self-selectivity) is modelled and estimated as one system of interrelated decisions. Two-stage and three-stage probit procedures are used to handle the simultaneity and self-selectivity problems. Results showed that population pressure and agroclimatic diversity are important determinants of crop intensification and planting regimes among maize farmers and further supported the importance of focusing maize research in terms of agroclimate and socio-economic domains. Shorter maturity and efficient double and multiple cropping methods are needed to increase land productivity and intensity of labour use in areas of high population pressure and bimodal rainfall, i.e. mid-altitude zones. On the other hand, technologies that would lead to increased productivity of capital and higher response to external inputs are desired for the highlands of Kenya. Access to extension and machine services, distance to the maize plot, and time of onset of the rains were also found to significantly influence the planting strategies of maize farmers.  相似文献   
54.
55.
In an inflation-non-indexed progressive tax system, inflation results in a “bracket-creep” effect that reduces the demand for corporate debt while the tax-deductibility of nominal interest makes the use of debt financing cheaper. The interactive effect of inflation and differential dividend and capital gains taxes on the value of a levered firm is analyzed in this paper. Under a non-indexed progressive tax system, inflation decreases the value of the unlevered firm but the effect of inflation on the firm's debt-to-asset ratio is theoretically indeterminate. The gain from leverage is also derived and compared with other valuation models.  相似文献   
56.
We investigate characteristics of cross‐market correlations using daily data from U.S. stock, bond, money, and currency futures markets using a new multivariate GARCH model that permits direct hypothesis testing on conditional correlations. We find evidence that arrival of information in a market affects subsequent cross‐market conditional correlations in the sample period following the stock market crash of 1987, but there is little evidence of such a relationship in the precrash period. In the postcrash period, we also find evidence that the prime rate of interest affects daily correlations between futures returns. Furthermore, we find that conditional correlations between currency futures and other markets decline steeply a few months before the crash and revert to normal dynamics after the crash. © 2002 Wiley Periodicals, Inc. Jrl Fut Mark 22:1059–1082, 2002  相似文献   
57.
58.
Understanding the trade-off relationships between ecological, economic and social objectives is important in designing policies to manage or restore ecosystems. Using the northern South China Sea (NSCS) as a case study, we explore the trade-offs between conservation and socio-economic objectives in managing fisheries in tropical marine ecosystems. Using a numerical optimization routine and ecosystem modelling (Ecopath with Ecosim), the study shows that current management of the NSCS is sub-optimal both in terms of conservation and economic objectives. Therefore, improvement in both conservation status and economic benefits can be achieved by reducing fishing capacity. However, the implementation of conservation plans may be hindered by the reduced number of fisheries-related jobs and the lack of alternative livelihoods. Similar trade-offs are apparent in many tropical marine ecosystems. Thus, this paper supports claims from previous studies that solving the alternative livelihood problems appears to be a priority for improving management and conservation in these ecosystems. A buy-back scheme that is funded by fishers might be effective in reducing fishing capacity. However, public funds are required if management objectives focus strongly on conservation. This might be justified by the direct or indirect benefits to society that could be provided by well-conserved ecosystems. This study highlights the conflict between maximizing conservation and social objectives, although win-win solutions between conservation and economic objectives may be possible.  相似文献   
59.
Abstract

The goal of this study is to investigate the causal relationship between financial development and economic growth in Gulf Cooperation Council (GCC) countries, i.e. Bahrain, Oman, Kuwait, Qatar, United Arab Emirates and Saudi Arabia, over the period 1980–2012. We employ panel unit root tests, and Error Correction Model and cointegration techniques to detect long-run and short-run causalities between the variables used in our study. The overall empirical results reveal that the financial sector development contributes significantly to economic growth in the GCC countries. Our results could be of great interest for policymakers since the financial sector could play a crucial role in lowering the dependency of the governments to oil revenues and could contribute significantly to spur economic growth.  相似文献   
60.
ABSTRACT

War and conflict brings about adverse changes for those who are displaced. How do entrepreneurial individuals respond to such adversity to either set-up, or continue with their existing entrepreneurial endeavours that would improve their own livelihood or that of others who have been affected? Whilst previous studies have found local knowledge, networks and resources to be crucial in the development of ventures in the war and conflict context, alienation from mainstream society within the host location often means that to succeed, those who are displaced require alternative strategies and approaches. Through examining the entrepreneurial ventures of six internally displaced entrepreneurs in Pakistan, our study identifies that entrepreneurial individuals find different ways to adapt to the new order, with both internal and external bricolage becoming the key strategies deployed to either re-establish their previous businesses or to develop new endeavours in the host location. To compensate for lack of local knowledge, networks and resources, we found that entrepreneurs followed closely their previous paths in their bricolage attempts, relying on reconfigurations of their pre-existing competencies, as well as utilizing pre-established and clandestine networks.  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