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   51篇
  免费   2篇
财政金融   10篇
工业经济   1篇
计划管理   16篇
经济学   8篇
运输经济   2篇
贸易经济   9篇
农业经济   4篇
经济概况   3篇
  2021年   1篇
  2020年   1篇
  2019年   1篇
  2017年   3篇
  2016年   2篇
  2015年   2篇
  2014年   6篇
  2013年   10篇
  2012年   2篇
  2011年   3篇
  2010年   4篇
  2009年   1篇
  2008年   4篇
  2007年   2篇
  2006年   2篇
  2005年   1篇
  2003年   1篇
  2002年   2篇
  2001年   1篇
  2000年   1篇
  1999年   1篇
  1992年   1篇
  1982年   1篇
排序方式: 共有53条查询结果,搜索用时 15 毫秒
1.
This survey examines the empirical literature on the relationship between public R&D subsidies and private R&D investment over the past five decades. The survey reveals a considerable heterogeneity of empirical results that cannot be explained fully by methodological issues. We aim to provide further explanations of the possible causes of that heterogeneity. In particular, we emphasise a set of issues that, in our view, are critical to understanding the potential effect of public R&D subsidies on private R&D spending. Special attention is paid to the dynamic aspects and composition of firm R&D, the constraints faced by the firm (such as financial constraints), and the amount and source of public subsidies. None of these issues have been investigated in depth. We formulate a set of research assumptions to guide future empirical research in this field.  相似文献   
2.
Research on spatial segregation has suggested that social mix may be a temporary phase in class displacement, where relations between different groups are at best divided or ‘tectonic’, for instance in England. Political and policy discourses, by contrast, tend to uncritically valorize social mix as a means to breaking up concentrations of poverty and providing neighbourhoods with a middle‐class voice. In the literature, little attention has been paid to power dynamics in socially mixed neighbourhoods and the implications this may have for understanding theory and policy. The five articles that make up this symposium address the ways in which social and ethnic groups interact in major cities in Europe and North America and, as the title suggests, this involves taking into account power relations, domination and negotiation between the different groups. There is a need to connect the experience of the deployment of power within neighbourhoods (and between them) with the discussions of power mechanisms at work in wider urban processes.  相似文献   
3.
I find that when a reseller with market power serves an airline company and only linear contracts are feasible, the airline prefers that the reseller utilizes the Name‐Your‐Own‐Price (NYOP) (a la Priceline) instead of the Posted Price (PP) (a la Hotwire) model. Essentially, the airline can better extract the surplus of the reseller if power over pricing is in the hands of numerous consumers, each bidding according to her preferences, instead of being concentrated in the hands of the reseller. Introducing two part tariff contracts or competition among resellers eliminates the distinction between the two pricing models. Either form of pricing generates the same outcome as vertical integration of the airline with the downstream market of resellers.  相似文献   
4.
A buyer procuring a single input possesses private information about each potential supplier's degree of fit with the buyer's needs. She can search among suppliers either sequentially or simultaneously. As long as the distribution of the fit parameter is not overly skewed to the left, sharing information with suppliers yields intensified price competition under simultaneous search. Moreover, the buyer cannot benefit by providing suppliers additional information beyond their own fitness parameter. Information revelation is never optimal with sequential search.  相似文献   
5.
This article presents an open discussion of the processes of urban secession and gentrification in contemporary European cities, arguing that intergroup social dynamics in urban spaces are generally more complex than either extreme mutual avoidance or the colonization of neighbourhoods by the wealthiest groups. We analyse the residential strategies of urban upper‐middle class managers in various European metropolitan areas through in‐depth semi‐structured interviews to argue that these groups develop complex strategies of proximity and distance in relation to other social groups. The development of these ‘partial exit’ strategies takes place through specific combinations of practices that allow groups to select the dimensions they are willing to share with other social groups, and those in which they prefer a more segregated social environment for themselves and their families. The responses of our interviewees were consistently more nuanced and complex than suggested by a simplistic theory about their drive to withdraw from society, forcing us to develop more sophisticated conceptual frameworks to account for the growing prevalence of multi‐layered identities and spheres of reference and solidarity, specific combinations of elective segregation and local involvement, and more active patterns of mobility combined with local embeddedness.  相似文献   
6.
In the course of the reconstruction of the European financial supervisory framework all level 3-committees (namely CEIOPS for the insurance sector) were re-established as fully-fledged authorities of the European Union. These authorities are granted authority to take decisions with immediate effect towards national supervisors. The European Financial Supervisory Authorities, however, form but the upper level of the European micro-prudential supervisory system. The day-to-day supervision of the financial markets will remain to be vested in the national supervisory authorities. By retaining a system, in which the financial supervision takes place primarily at the national level, one also remains to be faced with problems, where insurance undertakings or insurance groups act under the jurisdiction of several national supervisors. Disagreements between these supervisors will, thus, remain to be commonplace. In order to dissolve such disputes, the European legislator has provided for a formalised dispute resolution procedure in granting EIOPA a power to settle disagreements.  相似文献   
7.
Drainwater Management for Salinity Mitigation in Irrigated Agriculture   总被引:1,自引:0,他引:1  
Salinity and drainage management options include source control, reuse, and evaporation ponds. This article identifies efficient strategies to maintain hydrologic balance in closed drainage basins and evaluates their impact on regional agricultural profits. Theoretical analysis suggests that economic efficiency requires acknowledgment of the nonseparability between water use and land value. Empirically, our solution involves a modest amount of source control, a substantial amount of reuse, and the elimination of evaporation ponds often associated with large environmental damages, while maintaining grower income. Various policy instruments and options are introduced and discussed, including a system of drainwater charges, marketable permits, and land retirement.  相似文献   
8.
Abstract.  This paper illustrates how restricting trade instruments to non-discrimination links trade agreements to non-trade agreements and, under certain conditions, helps governments further lower tariffs and/or domestic standards (policies). These conditions are: (i) governments' objective functions are sufficiently concave with respect to domestic standards (policies); (ii) domestic standards are sufficiently valued; and (iii) policies are strategic complements. These can then be used as a rationale for restricting safeguard measures to non-discrimination.  相似文献   
9.
Adults' Statistical Literacy: Meanings, Components, Responsibilities   总被引:2,自引:0,他引:2  
Statistical literacy is a key ability expected of citizens in information-laden societies, and is often touted as an expected outcome of schooling and as a necessary component of adults'numeracy and literacy. Yet, its meaning and building blocks have received little explicit attention. This paper proposes a conceptualization of statistical literacy and describes its key components. Statistical literacy is portrayed as the ability to interpret, critically evaluate, and communicate about statistical information and messages. It is argued that statistically literate behavior is predicated on the joint activation of five interrelated knowledge bases (literacy, statistical, mathematical, context, and critical), together with a cluster of supporting dispositions and enabling beliefs. Educational and research implications are discussed, and responsibilities facing educators, statisticians, and other stakeholders are outlined.  相似文献   
10.
The quantitative approach to the analysis of the development of the civil and military-transport air fleet described in this paper lends itself to similar analyses of investment activity in different transport aircraft markets, the rating of investment opportunities, and the forecasting of purchases and joint technical projects. In addition, it is applicable in principle to pilot studies of other commercial product markets of.  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