19. Imagine that you are trying to decide whether to cross a street without using the designated crosswalk at the traffic signal.

What are the expected marginal benefits of crossing? The expected marginal costs? How would the following conditions change your benefit–cost equation?

a. The street was busy.

b. The street was empty and it was 3 a.m.

c. You were in a huge hurry.

d. A police officer was standing 100 feet away.

e. The closest crosswalk was a mile away.

f. The closest crosswalk was 10 feet away.