the baseline, we can state with a high degree of confidence that
most of the waste collected under the mandatory retail take-back
program would otherwise have gone to an MSW landfill in violation
of the state landfill bans. Clearly, making retail take-back
mandatory was highly effective at increasing compliance with the
state landfill bans and removing considerable amounts of HHWM
from improper disposal. Thus, making the program mandatory was
highly influential