Before starring as Tony Stark in Iron Man, Robert Downey Jr. had acted in 45 movies that had average first-weekend box office revenues of a bit less than $5 million. Iron Man grossed 102 million on...

Before starring as Tony Stark in Iron Man, Robert Downey Jr. had acted in 45 movies that had average first-weekend box office revenues of a bit less than $5 million. Iron Man grossed
102 million on its opening weekend.

a. How do you expect the success of Iron Man to influence the opportunity cost of hiring Robert Downey Jr.?

b. How have the incentives for a movie producer to hire Robert Downey Jr. changed?