Open Access. The Published version of this work has been reproduced here in accordance with the Publisher’s self archiving and copyright policies.
This article may be downloaded for personal use only. Any other use requires prior permission of Cambridge University Press. This work was published in Environment and Development Economics, 9, (5), 2004 p.613-644 published by Cambridge University Press and can be found at Cambridge Journals online http://dx.doi.org/10.1017/S1355770X04001445
Copyright (2004) Cambridge University Press
Environment and Development Economics, 9(5): 613-644