When you see a lighthouse and a child asks who made this (or had it made) how will you explain? Why?
This is a good question. Some ideas that you may research futher:
1.The Lighthouse in Economics -- Ronald H. Coase
2. In Coase's book, The ...
The solution explains the question being asked briefly and concisely. Several resources have been given that will help to answer the lighthouse ownership question. There is no clear answer to the question and the response does a good job of explaining that.