For each of the following examples, identify whether a positive or negative externality is present and whether there will be too little or too much of the activity relative to the socially optimal outcome.
A. Jerome has a beautifully landscaped front lawn with lots of colorful flowers. Landscaped lawns produce a externality. landscaped lawns exist relative to the socially efficient quantity.
B. Dave takes advantage of the low price of gas to purchase a sports utility vehicle. Sports utility vehicles generate a externality. sports utility vehicles are produced relative to the socially efficient quantity.
C. Susan decides to walk to work instead of driving. Walking to work creates a externality. walks to work exist relative to the socially efficient quantity.
D. Anita decides to smoke a cigarette while she is waiting at a busy bus stop. Cigarettes create a externality. cigarettes are produced relative to the socially efficient quantity.