Abstract
Extractive reserves, usually associated with the survival of rubber tappers in the Brazilian tropics, have close parallels elsewhere, including temperate zones. This research isolates the distinctive features of recent Amazonian reserves, illustrates parallel features in a fifty year-old management experiment in the United States, and explores the advantages extractive reserves offer land reformers interested not only in social equity and efficiency but in biological conservation. Extractive reserves stand apart from traditional land reforms in their innovative use of common property, a tenure mode well adapted to sustainable management of marginal lands