Whose work, The Logic of Collective Action, helped make the free rider problem a key concept of study in the social sciences?

The pension bubble was negatively affected by

a. the recession. b. over-hiring. c. veterans’ preference. d. all of the above.

Why was segregation in the North different from that in the South?

A) It was considered to have occurred as the result of private decisions made by individuals. B) It was more strictly enforced in the North. C) It was part of the legal system since the Revolution, whereas the South only instituted it after the Civil War. D) It occurred much less frequently. E) It never took place in the schools.