Microeconomics · 免费预览
公共物品与搭便车者
非竞争性且非排他性的物品通过自愿付费提供时会出现供给不足，因为每个人都希望别人付费；而效率要求在总支付意愿能够覆盖成本时提供该物品。
1. Two properties, four worlds
Two properties, four worlds
2. Summing vertically
Summing vertically
3. The free rider's arithmetic
The free rider's arithmetic
4. Solutions and near-solutions
Solutions and near-solutions
5. Classifying the good
A lighthouse beam warns all ships equally, one ship's use does not dim it for others, and there is no practical way to illuminate only paying ships. What kind of good is it?
6. The efficient provision test
A park costs 60 dollars, and three residents value it at 40, 25 and 15 dollars, all consuming the same park. Should it be built, and why?
7. Summing the values
Four citizens value a new bridge at 30, 20, 15 and 10 dollars each, all using the same bridge, whose cost is 60 dollars. Compute the total value in dollars and write the number.
8. Sorting the four worlds
Which of the following is the purest public good?
9. The free rider's logic
Why do voluntary contributions underprovide a public good?
10. Surplus of the bridge
Three citizens value a bridge at 40, 30 and 20 dollars each, and the bridge costs 85 dollars to build. Compute the total surplus from building it, and write the number.