We propose a theory of urban land use with endogenous property rights that applies to cities in developing countries. Households compete for where to live in the city and choose the property rights they purchase from a land administration which collects fees in inequitable ways. The model generates predictions regarding the levels and spatial patterns of residential informality in the city.

<p>The <i>State of the World’s Forest Genetic Resources</i> addresses the conservation, management and sustainable use of forest tree and other woody plant genetic resources of actual and potential value for human well-being in the broad range of management systems.

La République centrafricaine (RCA) couvre une superficie de 623 000 km2 et compte environ 23 millions d’hectares de forêts, soit environ 37% de sa superficie totale. Le secteur forêt-bois opère à partir du massif forestier du sud-ouest où seule l’exploitation forestière industrielle est effectuée.

The Central African Republic (CAR) has a total land area of 623,000 km2 of which close to 23 million hectares, i.e. 37%, is composed of forested lands. In the southwestern part of the country all forest operations are industrial. At present there are 11 logging companies, with an average annual production of close to 400,000 m3.

Irrigation can help to improve and stabilise agricultural productivity, thereby contributing to food security and to resilience against climate change.

Issues swirling around land across Africa have never been so central to key social and political-economic dynamics as they are at the present time. The first part of the paper briefly reviews the construction of customary tenure and the historical phases of administrative interventions into land tenure, and considers their heritage in contemporary situations.

Farmers under a sharecropping contract have been shown to exert less effort than farmers renting land due to lower incentives. They do not only choose their effort level, however, but also make investment decisions between projects of different risk-return profiles.

After the severe droughts in the 1970s and 1980s, and subsequent debates about desertification, analyses of satellite images reveal that the West African Sahel has become greener again.

Les études sur la transhumance ont souvent ciblé les pasteurs – notamment peuls – des zones sahéliennes. Pour en donner une autre perspective, la présente étude a été centrée sur les pratiques de la transhumance dans la zone soudano-sahélienne du Mali en intégrant la perception des agriculteurs et des pasteurs sédentaires concernés par la transhumance dans les zones d’accueil.