作者：KATZENBA.ND; BEHRMAN, JN; GRANT, JP; EBB, LF; STOBAUGH, RB; MALMGREN, HB
作者单位：International Business Machines (IBM); IBM USA; University of North Carolina; University of North Carolina Chapel Hill; General Electric; Harvard University
作者：SCHACHTE.O; ATKESON, T; CHAYES, A; LANDSBER.H; KANIARV, DW; BALDWIN, M; HARGROVE, JL
作者单位：Harvard University; Resources for the Future
