Here is another Marginal Revolution Video on Externalities. https://marginalrevolution.com/marginalrevolution/2020/04/pollution-is-an-attack-on-human- capital.html 5. In a paragraph of at least 5 sentences, summarize the toll booth experiment, how it was conducted, and what the results were. (10 points) 6. Explain the result from another study discussed regarding how pollution affects either German chess tournament moves or umpire calls in American baseball games. (4 points)

7. What does Tabarrok mean when he summarizes that "Pollution is an attack on human capital", and why discovering this could actually be good news.