The model is also capable of analyzing the impacts of setting aside vast tracts of land on the forest fringe around the world. In addition to this modeling work, he is engaged in empirical studies with biologists and students that measure the value of leaving many forests intact for recreation, wildlife, and nontimber forest products. For example, with Chuck Peters and Al Gentry, they did the first study to measure the value of nontimber forest products in the Amazon.
Furthermore, this model can also examine the consequences of setting aside large expanses of land on the edge of forests worldwide. In addition to this modeling effort, he is collaborating with biologists and students on field studies that measure the advantages of leaving many forests undisturbed for recreation, wildlife, and non-timber forest products. For example, in collaboration with Chuck Peters and Al Gentry, they conducted a pioneering study to determine the value of non-timber forest products in the Amazon.