Explain what determines the "optimal" amount of a public good and how this concept of optimality can change over time (as we elect new and different leaders).If you use any other sources, be sure to cite them within the text as well as provide a bibliographical citation at the end.

Provide one "unique" (i.e. don't use one that a classmate has already used!) example of the free rider problem that you have seen in yourlives. From this example, identify what is causing the market failure and a possible way to solve this problem.