cor'."'rrrE !&II!'! BENEX'ITS OF ENVTRONMENTAL, HEALTH, AND ...

10
In measuring the benefits of a regul*tion, one o{ten has availablc
data on chan'gei at difierent.le.vels ofthe model in Figure 1. It nay be
nec€ssary to report bene.fits in tenns of, for.e.xanple, ieduced exposure
to a hazard, rnther than in tcrrrrs of reducerl dollar cost^_s. It ls also
important nbt to engage in doubie , e,unting; {or.rxarr11,lr., onr shoulcl
not count, as benefits both a reductiorL irt eipa*tt, rnrl r redrrction in
dama,ge. Simlkrrl.y_, thc hcalth costs of air I'ollutiorr mry dcl1.es5 plopertl
lalups irr l,olluted tret:, lltd rvlrln rl'g1tlr,t ion i. ir,'pris'd,lbrrble
counting nul ro*ult if botlt innelsc,l I'r'oDetiv lalues and rc'll,.erl
hr.rllhcarecoslsarcireriedas benefils-'
Regulation can also cause changcs in human activity th&t havo beneffts
or"er and aboye those that leid to the redrrctions in r:osts of darnage.
The-sc include u,.e of better ttcJrnologies for. pertulming the lctir'itv
I re.