Manny is about to receive an award for perfect attendance at graduation and his step dad shows up to help him celebrate that night. Before leaving, Manny and his father walk through a strong mist of cologne. Gloria notes that despite the terrible smell, she’s never seen him get a mosquito bite. The cologne imposes external benefits (no mosquito bites) also external costs (the awful smell) on the remaining members of the household.
See more: externalities, negative externalities, private benefits, social benefits, social costs
Economics of Modern Family 