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. (shrink)

In contrast to the jeopardy caused to commonproperty regimes by conditions of open access, factorssuch as boundary ambiguity, shifts, and maintenancefailures are the causes of a different set of problemsin the Los Haitises National Park, a controversialprotected area in the Dominican Republic. Survey data,historical sources, and digital mapping informationoverlaying past boundary changes show that this areahas undergone two decades of design modifications inits perimeters. Despite a long history of communalownership in that country, there appears to be littlelikelihood of transforming this (...) tradition into amodern common property regime of use to community andenvironment in the park‘s buffer zone. This is due, atleast in part, to its highly porous, constantlychanging boundary, a source of on-going, open-accessproblems among local cultivators peripheral to thepark. (shrink)