Dan and Dave are both college graduates. Dan is a patrolman and Dave is a detective in the same police precinct. While Dan's job is inherently more dangerous than Dave's, Dave passed a difficult exam to gain promotion to detective. Dave earns more than Dan because
a. Dave's job is less dangerous.
b. of efficiency wages.
c. of education as a signal.
d. Dave has more human capital.
Ans: d. Dave has more human capital.
Economics
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