“…With conditions of uncertainty, there is still some debate about how BCA should proceed (Graham, 1981(Graham, , 1992Ready, 1993Ready, , 1995Chavas and Mullarkey, 2002). However, it is seems there is growing consensus that, using the definitions of Hammond (1981), it is appropriate to use an ex ante measure, i.e., based on individual's willingness to pay in an uncertain world, as opposed to an expected ex post measure in welfare analysis, or at least BCA.…”