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| Registros recuperados: 128 | |
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| Rahim, Afaf H.; van Ierland, Ekko C.; Wesseler, Justus. |
| The gum tree (Acacia senegal) in the Sahel-Sudan zone has many environmental benign functions. An important function is to control desertification. In this paper we analyze farmers' economic incentives to preserve the existing gum trees and their incentives to create new plantations using a real options approach. Results indicate that agricultural crops provide higher economic benefits as compared to gum agroforestry system. However, on the one hand, as gum arabic is produced during the dry period and land is abundant, there are low incentives for deforestation. Instead, farmers' tend to leave the land idle and let the tree growing. On the other hand, our results suggest that an increase in the prices of gum arabic of about 330 per cent is needed to induce... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Gum arabic; Deforestation; Entry and exit; Real options; Sudan; Crop Production/Industries; D4; N5; O13; Q12; Q23. |
| Ano: 2006 |
URL: http://purl.umn.edu/25720 |
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| Berck, Peter; Costello, Christopher; Fortmann, Louise; Hoffmann, Sandra A.. |
| One of the most controversial aspects of federal and state policies aimed at protecting old-growth ecosystems has been the potential impact of job losses on local economies. A fundamental question for historically timber-dependent communities is whether these policies will result in local economic stagnation and enduring pockets of poverty. In this paper, we examine the long-run impact of changes in timber-related employment on other types of employment and participation in major federal poverty programs. We use monthly, multi-county time series data to estimate a vector autoregressive model of the experience of northern California counties during the 1980s and 1990s. We find that employment base multiplier effects of timber employment on other types of... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Forest policy; Poverty; Employment; Time series; Food Security and Poverty; Q23; O15; R11; R15. |
| Ano: 2000 |
URL: http://purl.umn.edu/10831 |
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| Stennes, Brad; Niquidet, Kurt; van Kooten, G. Cornelis. |
| Energy has been produced from woody biomass in British Columbia for many decades, but it was used primarily within the pulp and paper sector, using residual streams from timber processing, to create heat and electricity for on-site use. More recently, there has been limited stand-alone electricity production and increasing capacity to produce wood pellets, with both using ‘waste’ from the sawmill sector. Hence, most of the low-cost feedstock sources associated with traditional timber processing is now fully employed. While previous studies model bioenergy production in isolation, we employ a transportation model of the BC forest sector with 24 regions to demonstrate that it is necessary to consider the interaction between utilization of woody feedstock for... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Bioenergy production from wood fibre; Mountain pine beetle; Competition for fibre; Environmental Economics and Policy; Resource /Energy Economics and Policy; Q23; Q42; C61; Q54. |
| Ano: 2009 |
URL: http://purl.umn.edu/50782 |
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| Sedjo, Roger A.; Sohngen, Brent. |
| Forestry has been considered to have potential in reducing the atmospheric concentration of carbon dioxide by sequestrating carbon in above-ground timber and below-ground roots and soil. This potential has been noted in the Kyoto Protocol, which identified specific forestry activities for which carbon sequestration credits could be obtained. To date, a few forestry efforts have been undertaken for carbon purposes, but most of these efforts have been on a small scale. Proposals have been under discussion, however, that would result in the creation of very large areas of new forest for the purpose of offsetting some of the additional carbon that is being released into the atmosphere. Concerns are expressed, however, that large-scale sequestration operations... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Carbon; Forests; Sequestration; Leakages; Timber markets; Prices; Models; Resource /Energy Economics and Policy; Q10; Q15; Q21; Q23; Q24. |
| Ano: 2000 |
URL: http://purl.umn.edu/10778 |
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| Nelson, Robert H.. |
| The U.S. Forest Service was founded early in the twentieth century with the progressive mission to achieve the scientific management of the forests of the United States. Scientific management was in part a political theory, holding out a model by which social values and technical considerations should function separately in the political process. However, since the 1970s the autonomy of Forest Service professionals to manage the national forests has been undermined by judicial decisions, White House and other executive branch oversight, and routine Congressional interference. Ecological management is a new attempt in the 1990s to revive scientific management but it is not likely to be any more successful than previous efforts. Instead, a new governing... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Scientific management; Progressive era; Forests; Forest Service; Environmental Economics and Policy; H41; N5; Q23; Q28. |
| Ano: 1998 |
URL: http://purl.umn.edu/10447 |
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| Sedjo, Roger A.; Sohngen, Brent; Mendelsohn, Robert. |
| This study develops cumulative carbon 'supply curves' for global forests utilizing an dynamic timber supply model for sequestration of forest carbon. Because the period of concern is the next century, and particular time points within that century, the curves are not traditional Marshallian supply curves or steady-state supply curves. Rather, the focus is on cumulative carbon cost curves (quasi-supply curves) at various points in time over the next 100 years. The research estimates a number of long-term, cumulative, carbon quasi-supply curves under different price scenarios and for different time periods. The curves trace out the relationship between an intertemporal price path for carbon, as given by carbon shadow prices, and the cumulative carbon... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Carbon supply curves; Sequestration; Timber; Forests; Model; Global warming; Prices; Markets; Resource /Energy Economics and Policy; Q10; Q15; Q21; Q23; Q24. |
| Ano: 2001 |
URL: http://purl.umn.edu/10663 |
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| Michetti, Melania; Parrado, Ramiro. |
| We present a computable general equilibrium model properly modified to analyse the potential role of the European forestry sector within climate mitigation. Improvements on database and modelling frameworks allow accounting for land heterogeneity across and within regions and for land transfers between agriculture, grazing, and forestry. The forestry sector has been modified to track carbon mitigation potential from both intensive and extensive forest margins, which have been calibrated according to a forest sectoral model. Two sets of climate policies are simulated. In a first scenario, Europe is assumed to commit unilaterally to reduce CO2 emissions of 20% and 30%, by 2020. In a second scenario, in addition to the emissions quotas, progressively higher... |
| Tipo: Presentation |
Palavras-chave: Climate Change; Climate Mitigation; General Equilibrium Modelling; Forestry; Land Economics/Use; D58; Q23; Q54; Q58. |
| Ano: 2012 |
URL: http://purl.umn.edu/124380 |
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| Registros recuperados: 128 | |
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