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   36篇
  免费   0篇
财政金融   7篇
计划管理   10篇
经济学   8篇
运输经济   2篇
农业经济   1篇
经济概况   8篇
  2020年   1篇
  2017年   2篇
  2015年   1篇
  2014年   4篇
  2013年   3篇
  2012年   2篇
  2011年   3篇
  2010年   1篇
  2009年   1篇
  2008年   2篇
  2000年   1篇
  1997年   1篇
  1994年   1篇
  1992年   3篇
  1991年   1篇
  1990年   2篇
  1988年   1篇
  1987年   1篇
  1982年   2篇
  1968年   1篇
  1958年   1篇
  1954年   1篇
排序方式: 共有36条查询结果,搜索用时 15 毫秒
1.
Freight on Transit (FOT) refers to an operational strategy where public transit vehicles and/or infrastructure are used to move freight. Examples include moving goods alongside passengers on buses, attaching cargo trailers to transit vehicles, and operating freight vehicles between trains on subway lines. This paper describes the methods and results of a three-round Delphi study engaging 34 transportation experts to explore challenges and opportunities of FOT and to conceptualize and evaluate potential FOT operations in Toronto. Traditional Delphi methods were used for the exploration of FOT challenges and opportunities, and a modified approach was formulated to integrate experts' opinions and develop new FOT concepts for Toronto. The results support previous claims that technical challenges of FOT may be easier to overcome than institutional barriers. Evaluation of potential FOT operating strategies in Toronto suggests that while the current public transit network does not have capacity to support additional movements, there may be realistic opportunities to include freight service in future projects as a means of offsetting operating costs and reducing the impacts of goods movements.  相似文献   
2.
Transatlantic Similarities and Contrasts in Rural Development Policies
The United States (US) and European Union (EU) share many general policy aims for rural areas, but they differ in the ways in which they try to achieve these aims. The principal difference lies in the role envisioned by agriculture in overall rural development. EU policies treat agriculture as a provider of public goods, and many of its 'rural' programmes target agriculture. In the US, very few Federal rural development programs are focused solely on agriculture. Differences of approach may be linked to different farm distributions, population densities, historical settlement patterns, and the historical policy process per se . In particular, in the US rural development policy does not cover the environment or income support to farmers; these are addressed through other programmes. In contrast, the EU classifies its agri-environmental programmes as rural development, claiming that more environmentally-friendly farm practices bring benefits to the broader rural economy. US State and local initiatives emphasize many themes found in the EU's Pillar II programmes, such as value-added or sustainable agriculture. Overall, although there are marked differences in the ways in which policies are implemented, the coverage of these policies in the EU and US is rather similar.  相似文献   
3.
It is argued in this article that sub-Saharan Africa, given its present institutions and endowments of capital and technology, is already dangerously close to overpopulation. The rapid growth of its population projected for the next decades will greatly increase human misery and depress economic development. Specifically, rapid population growth will have disastrous effects on the region's ability to increase exports and provide people with food. There must be a search for new ways in which these effects could be mitigated. In sub-Saharan Africa fertility either continues to be very high or is increasing, in part due to some decline in traditional practices that reduce fertility, such as prolonged breastfeeding. This situation and the expectation of declining mortality imply that African population growth may increase further. Currently, population in sub-Saharan Africa is about half that of India and a third of China. There are 2 main reasons why reduced fertility in the next few decades is unlikely in sub-Saharan Africa as a whole: Africa has low literacy, high infant and child mortality, and low urbanization; and average African fertility rates may even increase for the next 20 years or so. The question that arises is what are the implications of continuing and rapid population growth for the African food supply. The region's cereal production is largely restricted to 4 grains, i.e., millet, sorghum, maize, and rice. The volume of grain production is less, by weight, than 60% of the production of roots and tubers. There are 2 main differences between the output of these crops in sub-Saharan Africa and the rest of the world: yields/hectare are lower in Africa than in elsewhere; and yields have generally been decreasing or largely constant in Africa. The low productivity has several causes. Today, population pressure has brought diminishing returns to traditional agriculture in much of the Sahel and the savanna, in parts of East Africa, Southern Africa, and parts of the West African forest belt. There is also the absence of the Green Revolution, i.e., the use of new high yielding seeds and new technologies in agriculture that has led to marked increases in yields in most other parts of the world. A totally different and more productive agriculture might evolve if African governments were to fundamentally change their vision. Existing production technology could allow substantial increases in the yields of many crops if some basic changes were made in the policies affecting agriculture. A way to achieve such change would be to make farming profitable. The effect of population growth in diminishing returns to agriculture also lends urgency to the need for family planning. Generally, population policy in Africa badly needs strengthening.  相似文献   
4.
The Citanduy II Project's model farm program on steep slopes in West Java was started in 1981 with the dual goals of reducing erosion and increasing farmer incomes. Limited success in reaching both goats has been achieved. Subsidies used to implement the program, however, could have been allocated more efficiently.  相似文献   
5.
Two Trees     
We solve a model with two i.i.d. Lucas trees. Although the correspondingone-tree model produces a constant price-dividend ratio andi.i.d. returns, the two-tree model produces interesting asset-pricingdynamics. Investors want to rebalance their portfolios afterany change in value. Because the size of the trees is fixed,prices must adjust to offset this desire. As a result, expectedreturns, excess returns, and return volatility all vary throughtime. Returns display serial correlation and are predictablefrom price-dividend ratios. Return volatility differs from cash-flowvolatility, and return shocks can occur without news about cashflows.  相似文献   
6.
Commission of the European Communities, Directorate-General for Regional Policy, 1991: Europe 2000. Outlook for the Development of the Community's Territory. Luxembourg: Office for Official Publications of the European Communities, no price stated.

Kennedy, R. 1991: London. World City Moving into the 21st Century. London: Her Majesty's Stationery Office, £24.95 cloth.

Sheffield Economic Regeneration Committee, undated: Sheffield 2000. Phase One. Sheffield: Sheffield Economic Regeneration Committee, £7.50 in Sheffield, £25.00 outside Sheffield.

Stanworth, J. and Stanworth, C. 1991: Work 2000. The Future for Industry, Employment and Society. London: Paul Chapman Publishing, £15.95 cloth.  相似文献   
7.
The Urban Unbound: London's Politics and the 2012 Olympic Games   总被引:1,自引:0,他引:1  
Global events such as London's 2012 Olympic Games raise questions about the ways in which embedded political arrangements take their shape from relationships that stretch across and beyond urban boundaries. In this article, the urban politics that we wish to capture is not one that is merely located in the city, but rather one that has to constantly take into account the mediated demands folded (as it were) into the urban arena. In the first part of the article, the corporate politics of an Olympic‐related urban regeneration are outlined and then considered, first as a staged setting for interaction, a kind of placeless political engagement, and then as a more embedded spatial politics that takes into account the leverage of networked groups acting within and beyond the city. Following that, we explore the politics of regeneration when campaign groups and alternative coalitions of interest raise their own political demands by drawing on references outside of their immediate urban area and attempt to steer political dialogue in ways that extend the reach of urban politics. The urban politics at stake in this context, we argue, appears to work more through topology than a series of mapped connections; through actors registering their presence in ways that often dissolve the tension between inside and outside rather than define it in terms of separate political spaces.  相似文献   
8.
Explaining the variance of price-dividend ratios   总被引:1,自引:0,他引:1  
I report a bound on the variance of the-dividend ratios anda decomposition of their variance into terms that reflect changesin dividend growth and discount rates. The specification isnot restrictive. The test statistics do not require constructionof ex post present values; instead, they are restrictions onmeans, variances and covariances of price-dividend ratios, dividendgrowth, and discount rates. I consider implications for themean price-dividend ratio, and I evaluate whether a low meandiscount rate can rationalize the mean and variance of price-dividendratios. The results do not indicate any striking rejectionsof present value models. However, the bulk of the variance ofprice-dividend ratios must be accounted for by changing forecastsof discount rates, and discount rates must possess some unusualcharacteristics.  相似文献   
9.
In these excerpts from The Squam Lake Report, fifteen distinguished economists analyze where the global financial system failed, and how such failures might be prevented (or at least their damage better contained) in the future. Although there were many contributing factors to the crisis—including “agency” problems throughout the financial system and a bankruptcy code poorly suited for reorganizing financial firms—at the core of the problem is a potential conflict between the risk-taking proclivity of financial institutions and the interests of the economy at large that must be managed at least in part through more effective regulation. The Squam Lake Report provides a nonpartisan plan to transform the regulation of financial markets in ways designed to limit systemic risk while preserving—to the extent possible and prudent—the economies of scale and scope that justify the existence of today's large financial institutions. To reduce the risks that large banks will fail, the authors call for higher capital requirements based on more effective assessments of the risks of bank assets and liabilities, as well as a new systemic regulator that should be part of the central bank. To reduce the costs of failure when it occurs, the authors propose that banks be required to create “living wills” laying out their plan to sell assets or shut down operations in the event of financial trouble. As part of that plan, regulators are urged to “aggressively encourage” banks to issue “contingent” debt capital securities that convert into equity.  相似文献   
10.
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