Where should you look when you are backing in a straight line?
a) continuously to the target area and reference point, unless stopped.
b) in the inside rear-view mirror, using a target, until stopped.
c) straight ahead, glancing in all rear-view mirrors.
d) towards the rear with occasional glances forward.

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.