TY - JOUR A1 - Taylor, M A A1 - Sohngen, B L A1 - Randall, A J A1 - Pushkarskaya, H T1 - Group contracts for voluntary nonpoint source pollution reductions: evidence from experimental auctions. Y1 - 2004// N1 - R828627 JF - AMERICAN JOURNAL OF AGRICULTURAL ECONOMICS J1 - AM J AGR ECON VL - 86 IS - 5 SP - 1196 EP - 1202 ER -