1.Suppose 2,000 people would each get a benefit of $60 from a bridge. Building the bridge is socially efficient if its cost is less than $                     . If the cost is $80,000, a tax of $...

1.Suppose 2,000 people would each get a benefit of $60 from a bridge. Building the bridge is socially efficient if its cost is less than $
 . If the cost is $80,000, a tax of $
per person would generate unanimous support for the bridge.

2. An external benefit is experienced by
 .

3. A public good is
  (rival/nonrival) in consumption and

(excludable/nonexcludable).

4. The clearing of space debris is an example of
a that suffers from the
 problem. (Related to Application 1 on page 668.)