Macroeconomics 11th Edition by Michael Parkin

Exercise 25

The Economic Way of Thinking
Before starring in Iron Man, Robert Downey Jr. had appeared in 45 movies that grossed an average of $5 million on the opening weekend. In contrast, Iron Man grossed $102 million.
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