An obsession is select one: a. a persistent idea, thought or impulse that is unwanted and inappropriate, causing marked distress. b. repetitive behavior or mental act performed to reduce or prevent stress. c. a strongly held, fixed belief that has no basis in reality.

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.