Thanks for this. The true cost-effectiveness estimate should still be reduced by whatever the displacement effect is, even if it isn’t large. If we expect 9% of a conventional egg to be consumed for switching demand to 1 cage-free egg, then we should adjust the impact of the campaign downward by whatever the welfare effect of 9% of a conventional egg is.
Thanks for this. The true cost-effectiveness estimate should still be reduced by whatever the displacement effect is, even if it isn’t large. If we expect 9% of a conventional egg to be consumed for switching demand to 1 cage-free egg, then we should adjust the impact of the campaign downward by whatever the welfare effect of 9% of a conventional egg is.