Our new paper is out in Ambio!
http://www.ncbi.nlm.nih.gov/pubmed/24165869

Here, we tested different accessibility measures in land use / land cover change models in Amazonia. Proper time distance surfaces are most useful when doing modelling the deforestation patterns of the Peruvian Amazonia. However, also combinations of Euclidean distance surfaces (Euclidean distance from the cities and from the rivers) perform fairly well at least in our study area.