As an infant, stephanie received many penicillin injections from the doctor. when she later saw a photographer in a white coat that was similar to the doctor's coat, she started to cry. this is an example of:
a. instrumental learning
b. observational learning
c. classical conditioning
d. habituation

Mankiw attributes – chapter 1 and his 10 principles – differences in living standards within a countryover time and across countries at a moment in time to: a. the presence or absence of inflation and unemployment.b. the allocation of resources between private markets and the public sector.c. those that have dealt successfully with the efficiency v. equality tradeoff and those that haven’t.d. differences in productivity.e. ones that think at the margin and respond to incentives and those that don’t.