919 resultados para Natural resource


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We derive conditions that must be satisfied by the primitives of the problem in order for an equilibrium in linear Markov strategies to exist in some common property natural resource differential games. These conditions impose restrictions on the admissible form of the natural growth function, given a benefit function, or on the admissible form of the benefit function, given a natural growth function.

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Static oligopoly analysis predicts that if a single firm in Cournot equilibrium were to be constrained to contract its production marginally, its profits would fall. on the other hand, if all the firms were simultaneously constrained to reduce their productino, thus moving the industry towards monopoly output, each firm's profit would rise. We show that these very intuitive results may not hold in a dynamic oligopoly.

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Consider a general equilibrium framework where the marginal cost of extraction from several deposits of an exhaustible resource is constant in terms of an inexhaustible perfect substitute and differs between deposits. the instantaneous rate of production form the inexhaustible resource is subject to a capacity constraint.

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Nous envisageons le cas d'une ressource naturelle renouvelable exploitée en commun par des firmes qui se concurrencent à la fois dans le marché du produit et dans l'exploitation de la ressource. Nous montrons que l'introduction de la moindre différence de coûts entre les firmes peut avoir un effet drastique sur la nature de l' équilibre, à comparer avec le cas de coûts identiques. Pour ce faire, nous prenons comme point de référence un équilibre de Nash markovien parfait qui existe dans le cas de firmes identiques et qui a la propriété que les firmes jouent une stratégie linéaire jusqu'à une borne supérieure endogène du stock et la stratégie correspondant à l' équilibre de Cournot statique au-delà de cette borne. Après avoir montré qu'un équilibre de cette nature n'est pas soutenable avec des coûts asymétriques, nous proposons une caractérisation complète d'un équilibre de Nash markovien parfait au jeu différentiel correspondant à ce cas.

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Currently the push toward frontier areas, which until twenty years ago were still largely untouched by commercial agriculture, is taking place on a massive scale. This push is being driven not the least by global economic developments, such as the price increase of agriculture commodities like coffee and cocoa. In most cases the indigenous communities become trapped between the state monopoly in natural resource management and the competition for resources by external actors. In this processes the indigenous communities start to lose their access to resources. Another victim in this process is the environment where the natural resources are imbedded. International and national organizations working to conserve environment have became conscious of the important role that indigenous people could fulfill as partners in this endeavour. This partnership in struggle has produced a new discourse on the relationship between indigenous people and their environment. As a further consequence, programs were set up to develop what became known as Community Based Natural Resource Management (CBNRM) with its numerous variations. Based on a case study in a village on the eastern border of the Lore Lindu National Park in Central Sulawesi, this study questioned the basic assumption behind the concept of Community Based Natural Resource Management (CBNRM). Namely the assumption that communities living at the margin of forest are socially and culturally homogenous, still more or less egalitarian, and basically living in harmony with their natural environment. This study was inspired by the persistent critique – although still a minority – on the basic assumption the CBNRM from academicians and practitioners working through the Entitlement perspective. Another inspiration was the mounting critique toward the participatory approach. In its effort the study explore further the usefulness of certain approaches. One of the approach much relied on in this study was the local history of the community studied, through exerting oral and local written documents on local history, legends and local stories. These sources proofed quite capable in bringing the local history into the light. Another was the actor oriented approach, which later came to be supported by the concept of Social Pool Resources. The latter concept proofed to be useful as analytical instrument to integrate social institutions and the common pool resources, as a field of action for the different actors as human agencies.

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We study the role of natural resource windfalls in explaining the efficiency of public expenditures. Using a rich dataset of expenditures and public good provision for 1,836 municipalities in Peru for period 2001-2010, we estimate a non-monotonic relationship between the efficiency of public good provision and the level of natural resource transfers. Local governments that were extremely favored by the boom of mineral prices were more efficient in using fiscal windfalls whereas those benefited with modest transfers were more inefficient. These results can be explained by the increase in political competition associated with the boom. However, the fact that increases in efficiency were related to reductions in public good provision casts doubts about the beneficial effects of political competition in promoting efficiency.

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Approaches to natural resource management emphasise the importance of involving local people and institutions in order to build capacity, limit costs, and achieve environmental sustainability. Governments worldwide, often encouraged by international donors, have formulated devolution policies and legal instruments that provide an enabling environment for devolved natural resource management. However, implementation of these policies reveals serious challenges. This article explores the effects of limited involvement of local people and institutions in policy development and implementation. An in-depth study of the Forest Policy of Malawi and Village Forest Areas in the Lilongwe district provides an example of externally driven policy development which seeks to promote local management of natural resources. The article argues that policy which has weak ownership by national government and does not adequately consider the complexity of local institutions, together with the effects of previous initiatives on them, can create a cumulative legacy through which destructive resource use practices and social conflict may be reinforced. In short, poorly developed and implemented community based natural resource management policies can do considerably more harm than good. Approaches are needed that enable the policy development process to embed an in-depth understanding of local institutions whilst incorporating flexibility to account for their location-specific nature. This demands further research on policy design to enable rigorous identification of positive and negative institutions and ex-ante exploration of the likely effects of different policy interventions.

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This paper critically examines the impact of decentralization on contemporary and future governance arrangements in Ghana’s artisanal and small-scale mining (ASM) sector. The sector, while providing valuable employment in rural areas, is beleaguered by environmental and social issues. Proponents of decentralization argue that re-distributing decision-making authority leads to more responsive, transparent and efficient natural resource management. The analysis presented here, however, demonstrates how weak decentralization has exacerbated the complex, conflictual and clandestine nature of local resource politics surrounding ASM. If future decentralization reforms are going to reverse this trend and improve the governance of ASM in Ghana, then facilitating the participation of traditional authorities is imperative. It is argued that doing so requires addressing the reticence regarding the role of chiefs in resource governance; simply ironing out existing technical issues with decentralization reforms is unlikely to improve the social and environmental performance of ASM in the country. In light of the chronic resource management deficiencies in Ghana, epitomized in the ASM sector, fostering frank political debates on resource governance is becoming urgent.

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The natural resource base, terrestrial and marine, provides rural households in lower-income countries with income, food, shelter, and medicines, which are variously gathered and hunted in common lands and waters. These resources may be actively managed, whether by the government or local community; or may be de facto open access, with little effort by governments to prevent what may be de jure illegal extraction. This paper provides an appraisal of the literature that encompasses the direct value of wild resources to rural households; the extent to which these resources mitigate poverty and inequality; and the importance of the institutional context. The literature is increasingly addressing competing demands on the resource base both to support nearby livelihoods, and to enhance ecosystem services such as biodiversity; and how initiatives such as community-based payments for ecosystem services are changing how people interact with the resource base.

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Includes bibliography

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Good afternoon. Thank you for asking me to be with you today; I welcome this opportunity to talk with you, to hear what you're thinking, and to participate with you in an exchange of ideas. I've been asked to make some prepared remarks this afternoon, and when those are ended I welcome your ideas, your questions, and your comments. I look forward to more discussions with you at other times, as well. I do have open hours Friday afternoons, and encourage faculty and staff to stop by to visit, to share an idea, to ask a question, or to just visit. Sometimes duties call me away, as they will for the next few Fridays, but I try to be available as many Friday afternoons as possible for drop-in visitors. I hope you'll be among them. As a big believer in the land grant university, with our mission of teaching, research, and extension education, I also am a big believer that it takes all of us, working together, to fulfill that mission.