Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 186.
  1. Library Resource
    Documents et rapports de conférence
    décembre, 2004

    A leading cause of biodiversity decline is the habitat destruction associated with urban development. We use a database of county-level land use regulations to analyze the effects of local land use regulations on land use changes. We use the results of this analysis and a species-habitat associations matrix to conduct simulations that relate changes in local land use regulations to changes in biodiversity through predicted changes in land use.

  2. Library Resource
    Documents et rapports de conférence
    décembre, 2002

    Using a unique dataset on the characteristics, origin, and destination of households who engaged in intrametropolitan moves in the Columbus, Ohio area, we estimate a hybrid conditional logit choice model of residential location that separately identifies the push/pull influence of local public goods, namely school quality and public safety, from household income and other lifecycle effects.

  3. Library Resource
    Documents et rapports de conférence
    décembre, 2007
    Éthiopie

    Although a large theoretical literature discusses the possible inefficiency of sharecropping contracts, empirical evidence on this phenomenon has been ambiguous at best. Household level fixed-effect estimates from about 8,500 plots operated by households who own and sharecrop land in the Ethiopian highlands provide support for the hypothesis of Marshallian inefficiency. At the same time, a factor adjustment model suggests that the extent to which rental markets allow households to attain their desired operational holding size is extremely limited.

  4. Library Resource
    Documents et rapports de conférence
    décembre, 2005

    This paper presents the first results of the initial stages of a three years research project on optimization of the use of agricultural lands subject to risk of abandonment. After devising a physical marginality index for olive cultivation based on soil quality and slope, we estimate an approximate area of 200,000 hectares of marginal olive plantations in Andalusia. The risk of abandonment of these farmlands increases with the decoupling of the CAP subsidies and with the socio-economic characteristics of the production.

  5. Library Resource
    Documents et rapports de conférence
    décembre, 2006
    El Salvador, Honduras, Amérique centrale

    A household-level switching regression model is implemented to examine potential selectivity bias for rural households under high and low levels of investments in soil conservation in El Salvador and Honduras. In the presence of selectivity bias, separate stochastic production frontiers are estimated for low and high adopters. The main results indicate that households with higher levels of investments in soil conservation show higher average TE than those with a lower level of investments. Constrains in the rural land and credit markets are likely explanations for these differences.

  6. Library Resource
    Documents et rapports de conférence
    décembre, 2005

    This contribution discusses assets and limits of the local/territorial level as a core level to improve the sustainability of agriculture. The focus is on the issue of rural landscape maintenance through farming. Some possible institutional solutions to overcome the difficulties of family farms are examined. New institutional settings such as the "local group", constituting an interface for the negotiation among different local stakeholders, seem to effectively facilitate the stipulation of local contracts for landscape management.

  7. Library Resource
    Documents et rapports de conférence
    décembre, 2001
    Honduras

    This paper presents an econometric analysis of land-cover change in western Honduras. Ground-truthed satellite image analysis indicates that between 1987 and 1996, net reforestation occurred in the 1,015.12 km2 study region. While some reforestation can be attributed to a 1987 ban on logging, the area of reforestation greatly exceeds that of previously clear-cut areas. Further, new area was also deforested between 1987-1996. Thus, the observed land-cover changes most likely represent a complex mosaic of changing land-use patterns across time and space.

  8. Library Resource
    Documents et rapports de conférence
    décembre, 2002

    We estimate a sequential game between farmers and government auditors to determine the effectiveness of the current enforcement policy in deterring noncompliance with the conservation program on highly erodible land. The empirical results indicate that using farm program payments as leverage against noncompliance is insufficient for inducing full producer compliance.

  9. Library Resource
    Documents et rapports de conférence
    décembre, 2006

    Structural adjustments programs (SAPs) in the last two decades have eliminated all farm-support programs leading to low usage of fertilizers by Kenyan smallholders. One way of addressing this problem is use of organic nutrient resources. This paper examines their cost-effectiveness as capital investments in replenishment of Nitrogen (N), Phosphorus (P), Potassium (K) and soil organic matter (SOM) in smallholder, Maize-based cropping systems. On-farm trials were established in Maragwa and Kirinyaga Districts in 2003/04.

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