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51.
With the implementation of the North American Free Trade Agreement (NAFTA) nearly complete, there are concerns that the easy gains in efficiency have been achieved and that additional steps towards the economic integration of the member countries are required. This poses a distinct challenge to the NAFTA governments, since the agreement did not create trinational institutions with the supranational authority to facilitate the deepening of the new trading environment. In any initiative to further the economic integration of the NAFTA countries, agriculture will be a difficult sector in which to make progress. However, at an aggregate level, the support provided directly to agricultural producers by the NAFTA governments is similar, as are tariffs at an aggregate level. All three countries have devised income support programmes that contain a countercyclical element. In each of these areas, as well as in the operation of ‘green box’ programmes that are consistent with the member countries’ obligations to the World Trade Organization, cooperation and consultation among the NAFTA members would seem crucial if they are to achieve greater integration in the agrifood sector. This article examines the opportunities and challenges facing the NAFTA members as they seek further integration in the agrifood sector. 相似文献
52.
A survey on pickup and delivery problems 总被引:1,自引:0,他引:1
This paper is the first part of a comprehensive survey on pickup and delivery problems. Basically,
two problem classes can be distinguished. The first class, discussed in this paper, deals with the transportation
of goods from the depot to linehaul customers and from backhaul customers to the depot. This class is denoted
as Vehicle Routing Problems with Backhauls (VRPB). Four subtypes can be considered, namely the Vehicle Routing
Problem with Clustered Backhauls (VRPCB – all linehauls before backhauls), the Vehicle Routing Problem
with Mixed linehauls and Backhauls (VRPMB – any sequence of linehauls and backhauls permitted), the
Vehicle Routing Problem with Divisible Delivery and Pickup (VRPDDP – customers demanding delivery
and pickup service can be visited twice), and the Vehicle Routing Problem with Simultaneous Delivery and
Pickup (VRPSDP – customers demanding both services have to be visited exactly once). The second class,
dealt with in the second part of this survey, refers to all those problems where goods are transported between
pickup and delivery locations. These are the Pickup and Delivery Vehicle Routing Problem (PDVRP –
unpaired pickup and delivery points), the classical Pickup and Delivery Problem (PDP – paired pickup
and delivery points), and the Dial-A-Ride Problem (DARP – passenger transportation between paired
pickup and delivery points and user inconvenience taken into consideration). Single as well as multi vehicle
versions of the mathematical problem formulations are given for all four VRPB types, the corresponding exact,
heuristic, and metaheuristic solution methods are discussed.
相似文献
53.
Abstract . For more than a generation, contemporary mainland Chinese have lived under first a military dictatorship and now a political party dictatorship. How to explain to an eager Chinese academic audience what the American dream of ‘liberty and justice for all’—realized only in part in some areas but approached progressively nearer in others—really means? The U.S. has predominantly a capitalist system but its people are committed to equality of opportunity. It tempers ‘rugged individualism’ by concern for the poor, the handicapped and the unfortunate. It has many serious economic, social and cultural problems but its citizens, drawn from most of the peoples of the world—not the special interest groups trying to benefit at the expense of others—are determined to solve them equitably and rationally. The trade and budget deficits are related to government instrumentalities. 相似文献
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57.
Karl Aiginger 《Journal of Industry, Competition and Trade》2006,6(2):63-66
The term competitiveness stems from the analysis of firms and is usually thought to be well defined at the firm level. Today,
however, the notion competitiveness has become a prominent concept in the assessment of countries, regions and locations.
The competitive advantage of nations and the competitiveness of locations have become important topics in economic policy.
Interest in this field has been notably stimulated by the work of Michael Porter. Although the diversity of approaches presented
in this issue may appear large to the reader, it is in reality dwarfed by the multiplicity of concepts, articles and books
which have been written in reference to the term competitiveness. The vagueness of the general term, the lack of theoretical
background, implicit preferences and prejudices, and finally the scope of policy recommendations made in reference to this
term have induced outstanding researchers to warn that the term competitiveness of a nation could be dangerous, obsessive, elusive or meaningless.1 The articles presented in this volume share some elements of this critique, but also demonstrate that research is being continued,
and that it is indeed relevant to the design and evaluation of economic policy, most notably, the so-called Lisbon Strategy
of the European Union. 相似文献
58.
Prof. Dr. Karl Heinz Hausner lehrt Volkswirtschaftslehre an der Fachhochschule des Bundes für ?ffentliche Verwaltung
in Mannheim und ist Lehrbeauftragter an der Hochschule für Bankwirtschaft Frankfurt am Main. 《Wirtschaftsdienst》2006,86(3):180-184
Dem Kompromiss über die EU-Haushaltsplanung für die Jahre 2007 bis 2013 war eine kontroverse Debatte über den Umfang des „Briten-Rabatts“
und die Gemeinsame Agrarpolitik vorausgegangen. Welche Bedeutung hat die Agrarpolitik für die EU? Welche Mitgliedstaaten geh?ren
im EU-Haushalt zu den Nettozahlern? Besteht ein Zusammenhang zwischen den Zahlungsstr?men aus dem EU-Haushalt und der Wohlstandsverteilung
innerhalb der EU? 相似文献
59.
60.
We integrate insights from family business and organizational ecology into the entrepreneurship field by constructing a theoretical framework that explains how the regional context impacts family and non-family start-ups in differing ways. Regional count data models based on a rich longitudinal dataset reveal that while economic factors such as population size and growth in regions are primarily associated with the number of non-family start-ups, factors related to regional embeddedness, such as pre-existing small family businesses as well as favorable community attitudes toward small businesses, are more strongly associated with the number of family start-ups. Our research provides support for the notion that ‘the regional context’ is an important yet under-theorized area for research on venture creation and family business. 相似文献