政府的角色

A.C. Pigou observed that the sparks of passing trains harmed the crops of farmland near a railway. However, the noise of the trains also scared away the birds feeding on the crops and because of this the price of the farmland rose. Which of the following statements is correct?

In 1920, A.C. Pigou of Cambridge advanced the argument that, with a superior road and an inferior road, car drivers flock to use the superior road and cause traffic congestion.

A divergence between private and social costs

In many countries, residents in apartments are not allowed to keep dogs, but residents in garden houses are allowed to do so. Which of the following statements is correct?

The strict enforcement of a no-smoking law

A researcher reported that people with good looks receive an income about 5% higher than average workers, other abilities adjusted. This implies

Building a highway creates a nuisance for the environment nearby. Land prices near the highway often increase after the announcement of the route. This implies that

Two adjacent houses have trees extending into each other's garden area. Both owners clear the fallen leaves in their own lawns without saying anything to one another. Which of the following statements is correct?

A divergence between private and social costs

The introduction of a new airport near a city as a rule creates noise and pollution that affect the market value of the property nearby. Also as a rule, the market value of the nearby property rises because of a substantial increase in business activities. Which of the following is correct?