> Sometimes our estimated cost-effectiveness ranges include negative numbers if we are not certain that an intervention has a positive effect, and it could have

> Sometimes our estimated cost-effectiveness ranges include negative numbers if we are not certain that an intervention has a positive effect, and it could have a negative effect, even if we think that isn’t likely. This doesn’t necessarily mean we think those interventions are equally likely to harm animals as to help them. https://animalcharityevaluators.org/charity-review/the-humane-league/2018-nov/#fn1-4-24548 https://animalcharityevaluators.org/charity-review/the-human...