info:oai:oar.icrisat.org:718info:ofi/fmt:xml:xsd:journalShiferawBShiferaw, BReddyV RReddy, V RWaniS PWani, S P2008Watershed externalities, shifting cropping patterns and groundwater depletion in Indian semi-arid villages: the effect of alternative water pricing policiesEcological Economics267327-340article