Problem: For each of the following examples, identify whether a positive or negative externality is present. Next, for the cases where you find negative externalities, indicate which ones could be resolved through private bargaining and which would require some sort of government action.
a) Beer drinkers pay more for hazy IPAs because the price of hops has risen.
b) Raleigh installs more bike lanes.
c) Smithfield Foods opens another hog farm in Duplin County.
d) Your next-door neighbor plays Drake at high volume at a backyard party at 11 pm.
e) Smoking in bars and restaurants remains legal in many of the world's largest cities.